Mitac 8050Qma Users Manual
8050QMA to the manual 137a2d8d-7614-42d1-9e13-933b7ed7a390
2015-02-09
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BY: ZX Xiao
Repair Technology Research Department /EDVD
Repair Technology Research Department /EDVD
Jun.2005 / R01
SERVICE  MANUAL FOR
8050QMA
SERVICE  MANUAL FOR
SERVICE  MANUAL FOR
8050QMA
8050QMA

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Contents
1. Hardware Engineering Specification ………………………………………………………………………
1.1  Introduction ………………………………………………………………………………………………………………..
1.2  System Hardware Parts …………………………………………………………………………………………………... 
1.3  Other Functions ……………………………………………………………………………………………………………
1.4  Power Management ……………………………………………………………………………………………………….
1.5  Appendix 1 : Intel  ICH6-M GPIO Definitions ………………………………………………………………………….
1.6  Appendix 2 : W83L950D KBC Pins Definitions …………………………………………………………………………
1.7  Appendix 3 : 8050QMA Product Spec ……………………………………………………………………………….. …
2. System View and Disassembly ……………………………………………………………………………...
2.1  System View ………………………………………………………………………………………………………………..
2.2  Tools Introduction …………………………………………………………………………………………………..…….
2.3 System Disassembly ………………………………………………………………………………………………………..
3. Definition & Location of Connectors / Switches …………………………………………………………..
3.1  Mother Board (Side A) ……………………………………………………………………………………………………
3.2 Mother Board (Side B) ……………………………………………………………………………………………………
4. Definition & Location of Major Components ……………………………………………………………..
4.1  Mother Board (Side A) ……………………………………………………………………………………………………
4.2  Mother Board (Side B) ……………………………………………………………………………………………………
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5. Pin Description of Major Component …….……………………………………………………………….
5.1  Intel 915PM North Bridge ……………………………………………………………………………………………….
5.2  Intel ICH6-M South Bridge ………………………………………………………………………………………………
6. System Block Diagram ………………………………………………………………………………………
7. Maintenance Diagnostics ……………………………………………………………………………………
7.1  Introduction ………………………………………………………………………………………………………………..
7.2  Maintenance Diagnostics…………………………………………………………………………………………………..
7.3  Error Codes ………………………………………………………………………………………………………………..
8. Trouble Shooting …………………………………………………………………………………………….
8.1  No Power ……………………………………………………………………………………………………………………
8.2  No Display ………………………………………………………………………………………………………………….
8.3  VGA Controller Failure LCD No Display ………………………………………………………………………………..
8.4  External Monitor No Display ……………………………………………………………………………………………..
8.5  Memory Test Error ………………………………………………………………………………………………………..
8.6  Keyboard (K/B) Touch-Pad (T/P) Test Error ……………………………………………………………………………
8.7  Hard Drive Test Error ……………………………………………………………………………………………………
8.8  CD-ROM Drive Test Error ………………………………………………………………………………………………
8.9  USB Port Test Error ……………………………………………………………………………………………………….
8.10  Audio Failure ……………………………………………………………………………………………………………..
8.11  LAN Test Error …………………………………………………………………………………………………………..
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8.12  PC Card Socket Failure …………………………………………………………………………………………………
9. Spare Parts List ……………………………………………………………………………………………...
10. Reference Material …...……………………………………………………………………………………. 150
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1.1 Introduction
1. Hardware Engineering Specification
This document describes the brief introduction for MiTAC 8050QMA portable notebook computer system.
1.1.1 General Description
1.1.2 System Overview
The MiTAC 8050Q model is designed for Intel Dothan processor with 533MHz FSB with Micro-FCPGA package. 
This system is based on PCI architecture and is fully compatible with IBM PC/AT specification, which has 
standard hardware peripheral interface. The power management complies with Advanced Configuration and Power 
Interface. It also provides easy configuration through CMOS setup, which is built in system BIOS software and can 
be pop-up by pressing F2 key at system start up or warm reset. System also provides icon LEDs to display system 
status, such as AC Power indicator, Battery Power indicator, Battery status indicator, HDD,CD-ROM, NUM 
LOCK, CAP LOCK, SCROLL LOCK, Wireless on/off Card Reader Accessing. It also equipped with LAN, 56K 
Fax MODEM, 4 USB port, S-Video and audio line in/out , external microphone function. 
The memory subsystem supports DDR or DDR2 SDRAM channels (64-bits wide). 
The 915PM MCH Host Memory Controller integrates a high performance host interface for Intel Dothan processor, 
a high performance PCI Express  interface, a high performance memory controller and Direct Media Interface
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(DMI) connecting with Intel ICH6-M.
The Intel ICH6-M integrates three Universal Serial Bus 2.0 Host Controllers Interface (UHCI), the Audio 
Controller with AC97 interface, the Ethernet includes a 32-bit PCI controller, the IDE Master/Slave controllers, the 
SATA controller and Direct Media Interface technology. 
The Realtek RTL8100CL is a highly integrated, cost-effective single-chip Fast Ethernet controller that provides 32-
bit performance, PCI bus master capability, and full compliance with IEEE 802.3u 100Base-T specifications and 
IEEE 802.3x Full Duplex Flow Control. It also supports the Advanced Configuration Power management Interface 
(ACPI).
The VT6301S is a single chip PCI Host Controller for IEEE 1394-1995 Release 1.0 and IEEE 1394a P2000. It 
implements the Link and PHY layers for IEEE 1394-1995 High Performance Serial Bus specification release 1.0 
and 1394a P2000. It is compliant with 1394 Open HCI 1.0 and 1.1 with DMA engine support for high performance 
data transfer via a 32-bit bus master PCI host bus interface. The VT6301S supports 100, 200 and 400 Mbit/sec 
transmission via an integrated 1-port PHY. The VT6301S services two types of data packets: asynchronous and 
isochronous (real time). The 1394 link core performs arbitration requesting, packet generation and checking, and 
bus cycle master operations. It also has root node capability and performs retry operations.
The ENE CB712 CardBus/Media Reader controller functions as a single slot PCI to Cardbus bridge and also PCI 
interface  MS/SD/MMC flash card reader. The CB712 provide one Cardbus slot and all reader interface may 
operate simultaneously. 
The W83L950D is a high performance microcontroller on-chip supporting functions optimized for embedded 
control. These include ROM, RAM, four types of timers, a serial communication interface, optional I²C bus 
interface, host interface, A/D converter, D/A converter, I/O ports and other functions needed in control system
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configurations, so that compact, high performance systems can be implemented easily. 
A full set of software drivers and utilities are available to allow advanced operating systems such as Windows ME, 
Windows 2000 and Windows XP to take full advantage of the hardware capabilities. Features such as bus mastering 
IDE, Plug and Play, Advanced Power Management (APM) with application restart, software-controlled power 
shutdown.
Following chapters will have more detail description for each individual sub-systems and functions.
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1.2 System Hardware Parts
CPU  Intel® Pentium® M Processor (Dothan) 90nm, 2M L2, 533 MHz FSB 
Intel® Celeron® M processor, 90nm, 512K L2, 400 MHz FSB 
Core logic  Intel 915PM  +  ICH6-M chipset 
System BIOS  SST49LF004A 
Memory  0MB DDR2-SDRAM on Board 
Expandable with combination of optional 128MB/256MB/512MB/1GB(P) memory 
Two 200-pin DDR2 400/533 SDRAM Memory Module 
VGA Control  Type I MXM Interface (max 25W) with 8 cells Vram 
Priority at launch: NV44M + 32MB discrete Vram + Turbo Memory 
Clock Generator  ICS 954226 
IEEE1394  VT6301S 
LAN  RTL8100CL 
PCMCIA + 4 IN 1 CARD  ENE CB712 
Audio System  AC97 CODEC: Advance Logic, Inc, ALC655 
Power Amplifier: TI TPA0212 
Modem  AC97 Link: MDC (Mobile Daughter Card)  Askey: V1456VQL-P1(INT) 
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1.2.1 Intel Dothan Processors in Micro-FCBGA Package 
Intel Dothan Processors with 479 pins Micro-FCBGA package.
It will be manufactured on Intel’s advanced 90 nanometer process technology with copper interconnect. It’s features 
include Intel Architecture with Dynamic Execution, On-die primary 32-kB instruction cache and 32-kB write-back 
data cache, on-die 2-MB second level cache with advanced Transfer Cache Architecture, Data Prefetch Logic, 
Streaming SIMD Extensions 2 (SSE2), 533-MHz FSB. 
The Streaming SIMD Extensions 2 (SSE2) enable break-through levels of performance in multimedia applications 
including 3-D graphics, video decoding/encoding, and speech recognition.
Use Source-Synchronous Transfer (SST) of address and data to improve performance by transferring data four times 
per bus clock.
Support Enhanced Intel SpeedStep technology, which enables real-time dynamic switching of the voltage and 
frequency between two performance modes. 
1.2.2 Clock Generator
System frequency synthesizer: ICS954226 is a CK410M Compliant clock synthesizer. It provides a single-chip 
solution for mobile systems built with Intel P4-M processors and Intel mobile chipsets. It is driven with a 
14.318MHz crystal and generates CPU outputs up to 400MHz. It provides the tight ppm accuracy required by 
Serial ATA and PCI-Express.
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•Supports tight ppm accuracy clocks for Serial-ATA and SRC.
•Supports spread spectrum modulation, 0 to –0.5% down spread.
•Uses external 14.318MHz crystal, external crystal load caps are required for frequency tuning.
•Supports undriven differential CPU, SRC pair in PD# for power management.
1.2.3 The Mobile Intel 915PM Express Chipset 
The Mobile Intel 915PM Express Chipset integras a memory controller hub (MCH) designed for use with the 
Dothan, Yonah and Intel Celeron M Processor. It is PCI Express based Graphics. 
The 915PM MCH integrates a system memory DDR/DDR2 controller with two, 64-bit wide interfaces. Only 
Double Data Rate (DDR/DDR2)  memory is supported; the buffers support DDR SSTL_2 and DDR2 SSTL_18 
signaling interfaces. The memory controller interface is fully configurable through a set of control registers. It 
integras a high performance transition interface PCI Express Interface. PCI Express operates at a data rate of 2.5
for 8050QMA project. GB/s. This allows a maximum theoretical bandwidth of 40 GB/s each direction. The 915PM 
MCH integrates Direct media interface (DMI) chip-to-chip interconnect between the MCH and ICH6-M. DMI 
supports DMI x2 and DMI x4 configuration.
Features:
Processor/FSB Support
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•Intel®Dothan processor
•AGTL+ bus driver technology with integrated GTL termination resistors (gated AGTL+ receivers for reduced 
power)
•Supports 32-bit AGTL+ host bus addressing
•Supports system bus at 533MT/s (533 MHz) and 400MT/s (400 MHz)
•2X Address, 4X data
•Host bus dynamic bus inversion HDINV support
•12 deep, in-order queue
Memory System
•Directly supports to two DDR or DDR2 SDRAM channels, 64-bts wide.
•Supports SO-DIMMs of the same type (e.g.,all DDR or all DDR2), not mixed.
•Maximum of two, double-sided unbuffered SO-DIMMs (4 rows populated)
•Minimum amount of memory supported is 128 MB (16 MB x 16-b x 4 devices x 1 rows = 128 MB) using 
256-MB technology
•Maximum amount of memory supported is 2 GB using 1-GB technology.
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•256-MB, 512-MB and 1-GB technology using x8 and x16 devices.
•Three memory channel organizations are supported for DDR / DDR2 :
– Single channel
– Dual channel interleaved
– Dual channel asymmetric
•Supports DDR 333 devices and DDR2 400 /533 devices
– Supports on-die termination (ODT) for DDR2
•Supports Fast Chip Select mode
•Supports partial write to memory using Data Mask signal (DM)
•Supports high-density memory package for DDR or DDR2 type devices
PCI Express Interface 
•One x16 (16 lanes) PCI Express port intended for graphics attach
•Maximum theoretical realized bandwidth on interface of 4 GB/s in each direction simultaneously, for an 
average of 8 GB/s when x16
•Automatic discovery, negotiation and training of link out of reset
•Supports traditional PCI style traffic (asynchronous snooped, PCI ordering)
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•Supports only 1.5-V AGP electrics
•32 deep AGP request queue
•Hierarchical PCI-compliant configuration mechanism for downstream devices
•Direct Media Interface (DMI) 
– Chip-to-chip interconnect between the GMCH and ICH6-M 
– DMI x2 and DMI x4 configuration supported 
– Bit swapping is supported 
– Lane reversal is not supported 
1.2.4 I/O Controller Hub : Intel ICH6-M 
The ICH6 provides extensive I/O support. Functions and capabilities include:
•PCI Express Base Specification, Revision 1.0a-compliant
•PCI Local Bus Specification, Revision 2.3-compliant with support for 33 MHz PCI operations(supports up to 
seven Req/Gnt pairs)
•ACPI Power Management Logic Support
•Enhanced DMA controller, interrupt controller and timer functions
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•Integrated Serial ATA host controller with independent DMA operation on two ports and AHCI support
•Integrated IDE controller supports Ultra ATA100/66/33
•USB host interface with support for three USB ports; three UHCI host controllers; one EHCI high-speed 
USB2.0 Host controller
•Integrated LAN controller
•System Management Bus (SMBus) Specification, Version 2.0 with additional support for I2C devices
•Supports Audio Codec ’97, Revision 2.3 Specification (a.k.a.,AC ’97 Component Specification, Revision 2.3) 
which provides a link for Audio and Telephony codecs (up to 7 channels)
•Supports Intel High Definition Audio
•Low Pin Count (LPC) interface
•Firmware Hub (FWH) interface support
1.2.5 CardBus: CB712
Features:
3.3V operation with 5V tolerant
LFBGA 169-ball package 
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Pin out Compatible with CB1410
•PCI Interface
– Compliant with PCI Local Bus Specification Revision 2.3
– Compliant with PCI Bus Power Management Interface Specification Revision 1.1
– Compliant with PCI Mobile Design Guide Version 1.1
– Compliant with Advanced Configuration and Power Interface Specification Revision 1.0
•CardBus Interface
– Compliant with PC Card Standard 8.0
– Support Standardized Zoomed Video Register Model
– Support SPKROUT CAUDIO and RIOUT#
•Secure Digital Interface
– Compliant with SD Host Controller Standard Specification Version 1.0
– Support SD Suspend/Resume Functionality 
– Support DMA Mode to Minimize CPU Overhead 
– Support High Speed with the SD Clock Frequency Up to 50Mhz
– Contain two 512-byte buffer to maximize the transfer speed
– Support Traffic LED Light
– Support Over Current Protection
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•Memory Stick Interface 
– Compliant with Memory Stick PRO Format Specification Version 1.0
– Support 4-bit Parallel Data Transfer Mode
– Memory Stick Clock Frequency Up to 40Mhz 
– Support DMA Mode to Minimize CPU Overhead 
– Support Traffic LED Light
– Support Over Current Protection
•Interrupt Configuration
– Support Parallel PCI Interrupts
– Support Parallel IRQ and Parallel PCI Interrupts
– Support Serialized IRQ and Parallel PCI Interrupts
– Support Serialized IRQ and PCI Interrupts
•Power Management Control Logic 
– Support CLKRUN# protocol
– Support SUSPEND# 
– Support PCI PME# from D3, D2, D1 and D0 
– Support PCI PME# from D3cold 
•Support Zoomed Video port 
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•Support parallel 4-wire power switch interface 
The ALC655 is a 16-bit, full duplex AC'97 2.3 compatible six channels audio CODEC designed for PC multimedia 
systems, including host/soft audio and AMR/CNR based designs. The ALC655 incorporates proprietary converter 
technology to meet performance requirements on PC99/2001 systems. The ALC655 CODEC provides three pairs of 
stereo outputs with 5-Bitvolume controls, a mono output, and multiple stereo and mono inputs, along with flexible 
mixing, gain and mute functions to provide a complete integrated audio solution for PCs. The digital interface 
circuitry of the ALC655 CODEC operates from a 3.3V power supply for use in notebook and PC applications. The 
ALC655 integrates 50mW/20ohm headset audio amplifiers at
Front-Out and Surr-Out, built-in 14.318M 24.576MHz PLL and PCBEEP generator, those can save BOM costs. The 
ALC655 also supports the S/PDIF input and output function, which can offer easy connection of PCs to consumer 
electronic products, such as AC3 decoder/speaker and mini disk devices. ALC655 supports host/soft audio from Intel 
ICH6 chipsets as well as audio controller based VIA/SIS/ALI/AMD/nVIDIA/ATI chipset. Bundled Windows series 
drivers (WinXP/ME/2000/98/NT), EAX/
Direct Sound 3D/ I3DL2/ A3D compatible sound effect utilities (supporting Karaoke, 26-kind of environment sound 
emulation,10-band equalizer), HRTF 3D positional audio and Sensaura™ 3D (optional) provide an excellent 
entertainment package and game experience for PC users. Besides, ALC655 includes Realtek’s impedance sensing 
techniques that makes device load on outputs and inputs can be detected.
1.2.6 AC’97 Audio System: Advance Logic, Inc, ALC655 
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•Meets performance requirements for audio on PC99/2001 systems
•Meets Microsoft WHQL/WLP 2.0 audio requirements
•16-bit Stereo full-duplex CODEC with 48KHz sampling rate
•Compliant with AC’97 2.3 specifications
– 14.318MHz- 24.576MHz PLL to save crystal
– 12.288MHz BITCLK input can be consumed
– Integrated PCBEEP generator to save buzzer
– Interrupt capability
•Three analog line-level stereo inputs with 5-bit volume control: LINE_IN, CD, AUX
•High quality differential CD input
•Two analog line-level mono input: PCBEEP,PHONE-IN
•Two software selectable MIC inputs applications (software selectable)
•Boost preamplifier for MIC input 50mW/20 amplifier
•External Amplifier Power Down (EAPD) capability
•Power management and enhanced power saving features
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•Stereo MIC record for AEC/BF application 
•Supports Power Off CD function
•Adjustable VREFOUT control Supports double sampling rate (96KHz) of DVD audio playback
•Support 48KHz of S/PDIF output is compliant with AC’97 rev2.3 specification
•Power support: Digital: 3.3V; Analog: 3.3V/5V
1.2.7 MDC: Pctel Modem Daughter Card PCT2303W (Askey V1456VQL-P1) 
The PCT2303W chipset is designed to meet the demand of this emerging worldwide AMR/MDC market. The 
combination of PC-TEL’s well proven PCT2303W chipset and the HSP56TM MR software modem driver allows 
systems manufactures to implement modem functions in PCs at a lower bill of materials (BOM) while maintaining 
higher system performance.
PC-TEL has streamlined the traditional modem into the Host Signal Processing (HSP) solution. Operating with the 
Pentium class processors, HSP becomes part of the host computer’s system software. It requires less power to 
operate and less physical space than standard modem solutions. PC-TEL’s HSP modem is an easily integrated, cost-
effective communications solution that is flexible enough to carry you into the future.
The PCT2303W chip set is an integrated direct access arrangement (DAA) and Codec that provides a programmable 
line interface to meet international telephone line requirements. The PCT2303W chip set is available in two 16-pin
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small outline packages (AC’97 interface on PCT303A and phone-line interface on PCT303W). The chip set 
eliminates the need for an AFE, an isolation transformer, relays, opto-isolators, and 2-to 4-wire hybrid. The
PCT2303W chip set dramatically reduces the number of discrete components and cost required to achieve 
compliance with international regulatory requirements. The PCT2303W complies with AC’97 Interface specification 
Rev. 2.1.
The chip set is fully programmable to meet world-wide telephone line interface requirements including those 
described by CTR21, NET4, JATE, FCC, and various country-specific PTT specifications. The programmable 
parameters of the PCT2303W chip set include AC termination, DC termination, ringer impedance, and ringer 
threshold. The PCT2303W chip set has been designed to meet stringent world-wide requirements for out-of-band 
energy, billing-tone immunity, lightning surges, and safety requirements.
Features:
Virtual com port with a DTE throughout up to 460.8Kbps.
G3 Fax compatible
Auto dial and auto answer
Ring detection
•AC97 2.1 compliant
•86dB dynamic range TX/RX paths
Codec/DAA Features
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•2-4-wire hybrid
•Integrated ring detector
•High voltage isolation of 4000V
•Support for “Caller ID”
•Compliant with FCC Part68, CTR21, Net4 and JATE
•Low power standby
•Low profile SOIC package 16 pins 10x3x1.55mm
•Low power consumption
•10mA @ 3.3V operation
•1mA @ 3.3V power down
•Integrated modem codec
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•Data
– ITU-T V.90 (56Kbps), V.34 (4.8Kbps TO 33.6 Kbps), V.32 bis (4.8Kbps to 14.4Kbps), V.22 bis (1.2 bps 
to 2.4 Kbps), V.21 and Bell 103 and 212A(300 to 1200 bps) modulation protocol
– Data Compression ITU-T V.42bis MNP Class 5
– Error Correction ITU-T V.42 LAPM MNP 2-4
•Fax
– ITU-T V. 17, V.29, V.27ter, V.21, Channel 2, Group 3, EIA Class I
Standard Features 
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1.2.8 IEEE1394 VT6301S
1.2.8.1 Overview
The VT6301S IEEE 1394 OHCI Host Controller provides high performance serial connectivity. It implements 
the Link and Phy layers for IEEE 1394-1995 High Performance Serial Bus specification release 1.0 and 1394a-
2000. It is compliant with 1394 Open HCI 1.0 and 1.1 with DMA engine support for high performance data 
transfer via a 32-bit bus master PCI host bus interface. The VT6301S supports 100, 200 and 400 Mbit/sec 
transmission via an integrated 1-port PHY. The VT6301S services two types of data packets: asynchronous and 
isochronous (real time). The 1394 link core performs arbitration requesting, packet generation and checking, 
and bus cycle master operations. It also has root node capability and performs retry operations. The VT6301S is 
ready to provide industry-standard IEEE 1394 peripheral connections for desktop and mobile PC platforms. 
Support for the VT6301S is built into Microsoft Windows 98, Windows ME, Windows 2000 and Windows XP
1.2.8.2 Features
•32 bit CRC generator and checker for receive and transmit data
•On-chip isochronous and asynchronous receive and transmit FIFOs for packets (2K for general 
receive plus 2K for isochronous transmit plus 2K for asynchronous transmit)
•8 isochronous transmit contexts
•4 isochronous receive contexts
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•3-deep physical post-write queue
•2-deep physical response queue
•Dual buffer mode enhancements
•Skip Processing enhancements
•Block Read Request handling
•Ack_tardy processing
Firmware Hub for Intel® 810, 810E, 815, 815E,815EP, 820, 840, 850 Chipsets 
Flexible Erase Capability 
– Uniform 4 KByte Sectors
– Uniform 16 KByte overlay blocks for SST49LF002A
– Uniform 64 KByte overlay blocks for SST49LF004A 
– Top boot block protection 
– 16 KByte for SST49LF002A 
– 64 KByte for SST49LF004A
1.2.9 System Flash Memory (BIOS) 
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– Chip-Erase for PP Mode 
Single 3.0-3.6V Read and Write Operations 
Superior Reliability 
Firmware Hub Hardware Interface Mode Supports Intel High Definition Audio
– 5-signal communication interface supporting byte Read and Write 
– 33 MHz clock frequency operation 
– WP# and TBL# pins provide hardware write protect for entire chip and/or top Boot Block
– Block Locking Register for all blocks 
– Standard SDP Command Set
– Data# Polling and Toggle Bit for End-of-Write detection 
– 5 GPI pins for system design flexibility
– 4 ID pins for multi-chip selection
1.2.10 Memory System 
1.2.10.1 256MB, 512MB, 1GB (x64) 200-Pin DDR2 SDRAM SODIMMs
•JEDEC-standard 200-pin, small-outline, dual in-line memory module (SODIMM) 
•VDD=+1.8V±0.1V, VDDQ=+1.8V±0.1V
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•JEDEC standard 1.8V I/O (SSTL_18-compatible)
•Differential data strobe (DQS,DQS#) option
•Four-bit prefetch architecture
•Differential clock input (CK,CK#)
•Command entered on each rising CK edge
•DQS edge-aligned with data for Reads
•DQS center-aligned with data for Writes
•Duplicate output strobe (RDQS) option for x8 configuration
•DLL to align DQ and DQS transitions with CK
•Four internal banks for concurrent operation 
•Data mask (DM) for masking write data
•Programmable CAS Latency (CL) : 2,3,4 and 5
•Posted CAS additive latency (AL) : 0,1,2,3 and 4
•Write latency = Read latency – 1tCK
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•Programmable burst lengths : 4 or 8
•Read burst interrupt supported by another READ
•Write burst interrupt supported by another WRITE
•Adjustable data – output drive strength
•Concurrent auto precharge option is supported 
•Auto Refresh (CBS) and Self Refresh Mode
•64ms, 8,192-cycle refresh
•Off-chip drive (OCD) impedance calibration
•On-die termination (ODT)
General
1.2.11 LAN PHY: RTL8100C(L) 
The Realtek RTL8100C(L) is a highly integrated, cost-effective single-chip Fast Ethernet controller that provides 32-
bit performance, PCI bus master capability, and full compliance with IEEE 802.3u 100Base-T specifications and 
IEEE 802.3x Full Duplex Flow Control. It also supports the Advanced Configuration Power management Interface 
(ACPI), PCI power management for modern operating systems that are capable of Operating System Directed Power
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Management (OSPM) to achieve the most efficient power management possible. The RTL8100C(L) does not 
support CardBus mode as the RTL8139C does. In addition to the ACPI feature, the RTL8100C(L) also supports 
remote wake-up (including AMD Magic Packet, LinkChg, and Microsoft® wake-up frame) in both ACPI and APM 
environments. The RTL8100C(L) is capable of performing an internal reset through the application of auxiliary 
power. When auxiliary power is applied and the main power remains off, the RTL8100C(L) is ready and waiting for 
the Magic Packet or Link Change to wake the system up. Also, the LWAKE pin provides 4 different output signals 
including active high, active low, positive pulse, and negative pulse. The versatility of the RTL8100C(L) LWAKE 
pin provides motherboards with Wake-On-LAN (WOL) functionality.  The RTL8100C(L)  also  supports Analog
Auto-Power-down,  that  is,  the  analog  part  of  the RTL8100C(L)  can  be  shut down temporarily according to 
user requirements or when the RTL8100C(L) is in a power down state with the wakeup function disabled. In 
addition, when the analog part is shut down and the IsolateB pin is low (i.e. the main power is off), then both the 
analog and digital  parts  stop  functioning  and  the  power  consumption  of  the  RTL8100C(L)  will  be  negligible. 
The RTL8100C(L)  also supports  an  auxiliary  power  auto-detect  function  and  will  auto-configure  related  bits  
of  their  own  PCI  power  management registers in PCI configuration space.
•128 pin QFP/LQFP
•Integrated Fast Ethernet MAC, Physical chip and transceiver in one chip
•10 Mb/s and 100 Mb/s operation
•Supports 10 Mb/s and 100 Mb/s N-way Auto-negotiation operation 
•PCI local bus single-chip Fast Ethernet controller
1. Compliant to PCI Revision 2.2 
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2. Supports PCI clock 16.75MHz-40MHz
3. Supports PCI target fast back-to-back transaction 
4. Provides PCI bus master data transfers and PCI memory space or I/O space mapped data transfers of 
RTL8100C(L)'s operational registers 
5. Supports PCI VPD (Vital Product Data)
6. Supports ACPI, PCI power management  
•Supports 25MHz crystal or 25MHz OSC as the internal clock source. The frequency deviation of either crystal 
or OSC must be within 50 PPM. 
•Compliant to PC99/PC2001 standard 
•Supports Wake-On-LAN function and remote wake-up (Magic Packet*, LinkChg and Microsoft® wake-up  
frame)
•Supports 4 Wake-On-LAN (WOL) signals (active high, active low, positive pulse and negative pulse) 
•Supports auxiliary power-on internal reset, to be ready for remote wake-up when main power still remains off
•Supports auxiliary power auto-detect, and sets the related capability of power management registers in PCI 
configuration space
•Includes a programmable, PCI burst size and early Tx/Rx threshold
•Supports a 32-bit general-purpose timer with the external PCI clock as clock source, to generate timer-interrupt
•Contains two large (2Kbyte) independent receive and transmit FIFOs
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•Advanced power saving mode when LAN function or wakeup function is not used
•Uses 93C46 (64*16-bit EEPROM) to store resource configuration, ID parameter and VPD data
•Supports LED pins for various network activity indications 
•Supports loop back capability
•Half/Full duplex capability
•Supports Full Duplex Flow Control (IEEE 802.3x)
The Winbond Keyboard controller architecture consists of a Turbo 51 core controller surrounded by various registers, 
nine general purpose I/O port, 2k+256 bytes of RAM, four timer/counters, dual serial ports, 40K MTP-ROM that is 
divided into four banks, two SMBus interface for master and slave, Support 4 PWM channels, 2 D-A and 8 A-D 
converters.
1.2.12 Keyboard System: Winbond W83L950D
•8051 uC based
•Keyboard Controller Embedded Controller
•Supply embedded programmable flash memory (internal ROM size: 40KB) and RAM size is 2 KB
•Support 4 Timer (8 bit) signal with 3 prescalers
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•Support 2 PWM channels, 2 D-A and 8 A-D converters
•Reduce Firmware burden by Hardware PS/2 decoding
•Support 72 useful GPIOs totally
•Support Flash utility for on board re-flash
•Support ACPI
•Hardware fast Gate A20 with software programmable 
IDE HDD 
1.2.13 Hard Disk Drive
The ICH6 IDE controller features one set of interface signals that can be enabled, tri-stated or driven low. The IDE 
interfaces of the ICH6 can support several types of data transfers:
•Programmed I/O (PIO): processor is in control of the data transfer 
•8237 style DMA: DMA protocol that resembles the DMA on the ISA bus, although it does not use the 8237 in 
the ICH6. This protocol off loads the processor from moving data. This allows higher transfer rate of up to 
16MB/s 
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•Ultra ATA/33/66/100: DMA protocol that redefines signals on the IDE cable to allow both host and target 
throttling of data and transfer rates of up to 33/66/100 MB/s
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Keys 
Combination  Feature  Meaning 
Fn + F1  Power down  Mini PCI power down 
Fn + F2  Reserve   
Fn + F3  Volume Down   
Fn + F4  Volume Up   
Fn + F5  LCD/external CRT switching  Rotate display mode in LCD only, CRT only, and 
simultaneously display. 
Fn + F6  Brightness down  Decreases the LCD brightness  
Fn + F7  Brightness up  Increases the LCD brightness  
Fn + F10  Battery Low Beep  On/Off Battery Low Beep 
Fn + F11  Panel Off/On   Toggle Panel on/off 
Fn + F12  Suspend to DRAM / HDD   Force the computer into either Suspend to HDD or 
Suspend to DRAM mode depending on BIOS Setup. 
1.3 Other Functions
1.3.1 Hot Key Function
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1.3.2 Power On/Off/Suspend/Resume Button 
1.3.2.1 APM Mode
At APM mode, Power button is on/off system power.
At ACPI mode. Windows power management control panel set power button behavior.
You could set “standby”, “power off” or “hibernate”(must enable hibernate function in power Management) to 
power button function.
Continue pushing power button over 4 seconds will force system off at ACPI mode.
1.3.2.2 ACPI Mode
1.3.3 Cover Switch 
System automatically provides power saving by monitoring Cover Switch. It will save battery power and prolong 
the usage time when user closes the notebook cover.
At ACPI mode there are four functions to be chosen at windows power management control panel.
1. None
2. Standby
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1.3.4 LED Indicators
1.3.4.1 Three LED Indicators at Front Side:
From left to right that indicate  BATTERY POWER, BATTERY STATUS  and AC POWER
-- AC POWER:
This LED lights green when the notebook was powered by AC power line, Flashes (on 1 second, off 1  
second) when entered suspend to RAM state with AC powered. The LED is off when the notebook is in 
power off state or powered by battery.
-- BATTERY POWER
This LED lights green when the notebook is being powered by Battery, and flashes (on 1 second, off 1 
second) when entered suspend to RAM state with AC powered. The LED is off when the notebook is in 
power off state or powered by AC adapter.
-- BATTERY STATUS:
During normal operation, this LED stays off as long as the battery is charged. When the battery charge 
drops to 10% of capacity, the LED lights red, flashes per 1 second and beeps per 2 second. When AC is 
3. Off
4. Hibernate (must enable hibernate function in power management)
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connected, this indicator glows green if the battery pack is fully charged or orange (amber) if the battery is  
being charged.
AC POWER:This LED lights green when AC is powering the notebook, and flash (on 1 second, off 1 second) 
when Suspend to RAM no matter using AC power or Battery power. The LED is off when the 
notebook is off or powered by battery.
BATTERY POWER: This LED lights green when the notebook is being powered by Battery, and flash (on 1 
second, off 1 second) when Battery is low. The LED is off when the notebook is off or 
powered by AC adaptor.
1.3.4.2 Seven LED Indicators:
System has seven status LED indicators at front side which to display system activity. From left to right that 
indicate HARD DISK, CD-ROM, NUM LOCK, CAPS LOCK, SCROLL LOCK, Wireless on/off, Card Reader 
Accessing Blue-Tooth.
1.3.5 Battery Status
1.3.5.1 Battery Warning
-- System also provides Battery capacity monitoring and gives users a warning signal to alarm they to
store data before battery dead. This function also protects system from mal-function while battery 
capacity is low.
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-- Battery Warning: Capacity below 10%, Battery Capacity LED flashes , and system beeps per 2 seconds.
-- System will Suspend to HDD after 2 Minutes to protect users data.
1.3.5.2 Battery Low State
After Battery Warning State, and battery capacity is below 5%, system will generate beep sound for twice per 
second.
1.3.5.3 Battery Dead State
When the battery voltage level reaches 11.5 volts, system will shut down automatically in order to extend the 
battery packs' life.
FAN is controlled by W83L950D embedded controller-using ADT7460 to sense CPU and VGA temperature and 
PWM control fan speed.  Fan speed is depended on CPU and VGA temperature. Higher CPU or VGA  temperature 
faster Fan Speed. 
1.3.6 Fan Power On/Off Management
1.3.7 CMOS Battery
CR2032 3V 220mAh lithium battery
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When AC in or system main battery inside, CMOS battery will consume no power.
AC or main battery not exists, CMOS battery life at less  (220mAh/5.8uA) 4 years.
One Power Supply Jack
One External DVI-I Connector For DVI Display
Supports four USB port for all USB devices.
One MODEM RJ-11 phone jack for PSTN line 
One RJ-45 for LAN.
One IEEE1394 port
One TV-Out port
Reserve 1 connector on board for USB 2.0 Device
Headphone Out Jack. 
Microphone Input Jack.
1.3.8 I/O Port 
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Implanted H/W current limit and battery learning circuit to enhance protection of battery. 
1.3.9 Battery Current Limit and Learning
Line in Jack
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1.4 Power Management
The 8050MB system has built in several power saving modes to prolong the battery usage for mobile purpose. User 
can enable and configure different degrees of power management modes via ROM CMOS setup (booting by pressing 
F2 key). Following are the descriptions of the power management modes supported. 
1.4.1 System Management Mode
1.4.1.1 Full on Mode
In this mode, each device is running with the maximal speed. CPU clock is up to its maximum.
1.4.1.2 Doze Mode
In this mode, CPU will be toggling between on & stop grant mode either. The technology is clock throttling. This 
can save battery power without loosing much computing capability.
The CPU power consumption and temperature is lower in this mode.
1.4.1.3 Standby Mode
For more power saving, it turns of the peripheral components. In this mode, the following is the status of each 
device:
-- CPU: Stop grant
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-- LCD: backlight off
-- HDD: spin down 
1.4.1.4 Suspend to DRAM
The most chipset of the system is entering power down mode for more power saving. In this mode, the following 
is the status of each device:
Suspend to DRAM
-- CPU: off
-- Intel 915GM: Partial off 
-- VGA: Suspend
-- PCMCIA: Suspend
-- Audio: off
-- SDRAM: self refresh
Suspend to HDD
-- All devices are stopped clock and power-down
-- System status is saved in HDD
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-- All system status will be restored when powered on again
Implanted H/W current limit and battery learning circuit to enhance protection of battery. 
1.4.2 Other Power Management Functions
1.4.2.1 HDD & Video Access
System has the ability to monitor video and hard disk activity. User can enable monitoring function for video 
and/or hard disk individually. When there is no video and/or hard disk activity, system will enter next PMU state 
depending on the application. When the VGA activity monitoring is enabled, the performance of the system will 
have some impact.
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1.5 Appendix 1: Intel  ICH6-M GPIO Definitions (1)
Pin name  Current Define    Power plane 
GPIO0 PCI_REQ6#  I  MAIN 
GPIO1 MINIPCI_ACT#  I  MAIN 
GPIO2 PCI_INTE#  I  MAIN 
GPIO3 PCI_INTF#  I  MAIN 
GPIO4 PCI_INTG#  I  MAIN 
GPIO5 PCI_INTH#  I  MAIN 
GPIO6 PM_BMBUSY#  I  MAIN 
GPIO9 X  I  RESUME 
GPIO10 X  I  RESUME 
GPIO11 SMBALERT#  I  RESUME 
GPIO12 KBD_US/JP#  I  MAIN 
GPIO13 WAKE_UP#  I  RESUME 
GPIO14 X  I  RESUME 
GPIO15 X  I  RESUME 
GPIO16 SB_BY_ON#  O  MAIN 
GPIO17 SCI#  I  MAIN 
GPIO18 STOP_PCI#  O  MAIN 
GPIO20 STOP_CPU#  O  MAIN 
GPIO23 WIRELESS_PD#  O  MAIN 
GPIO24 SPK_OFF  I/O  RESUME 
GPIO25   I/O  RESUME 
GPIO26 PANEL_ID0  I  MAIN 
GPIO27 X  I/O  RESUME 
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Pin name  Current Define    Power plane 
GPIO28 X  I/O  RESUME 
GPIO29 PANEL_ID1  I  MAIN 
GPIO30 PANEL_ID2  I  MAIN 
GPIO31 PANEL_ID3  I  MAIN 
GPIO32 PCLKRUN#  I/O  MAIN 
GPIO33 MB_ID0  I/O  MAIN 
GPIO34 MB_ID1  I/O  MAIN 
GPIO40 MXM_DETECT#  I  MAIN 
GPIO41 CRT_IN#  I  MAIN 
GPIO48 X  O  MAIN 
GPIO49 HPWRGD  OD O  MAIN 
1.5 Appendix 1: Intel  ICH6-M GPIO Definitions (2)
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1.6 Appendix 2: W83L950D KBC Pins Definitions (1)
Port Pin Function Implement
P0 0-7 KO[0..7]
P1 0-7 KO[8..15]
P3 0-7 KI[0..7]
0 LPC enable H8_THRM#
1GPIO x1 H8_WAKE_UP#
2 BATT_G#
3 BATT_R#
4EXTSMI#
5CAP#
6 NUM#
7 SCROLL#
0H8_ENABKL
1CHARGING
2LEARING
3 H8_SUSB
4 KBRST H8_HRCIN#
5 A20 A20GATE
6H8_SCI
7H8_PWRON
0GPIO x1 SW_VDD3
1H8_LIDSW#
2 BATT_DEAD#
3H8_ADEN#
4 BATT_LED#
5 KBC_PWRON_VDD3S
6BLADJ
7H8_I_CTR
Scan matrix
P2
SMBUS1 or UART
GPIO x4
P4
Xcin/cout or PWM 2,3
GPIO x2 (INT1)
GPIO x2
P5
GPIO x3 (INT20,30,40)
GPIO x2
D/A, PWM 2,3
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Port Pin Function Implement
0 PWRBTN#
1 KBC_RI#
2 AC_ POWER#
3 BATT_V
4 BATT_T
5H8_I_LIMIT
6H8_PROCHOT#
7 +BC_CPUCORE
0T_DATA
1H8_RSMRST
2 ICH_PWRBTN
3T_CLK
4 H8_PWRON_SUSB#
5SUSC#
6 BAT_DATA
7BAT_CLK
0 PCICLK_KBC
1SERIRQ
2LAD3
3LAD2
4LAD1
5LAD0
6 KBC_PCIRST#
7LFRAME#
P8 LPC interface
P6 A/D (INT5-12)
P7
PS/2 port x3
SMBUS
1.6 Appendix 2: W83L950D KBC Pins Definitions (2)
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1.7 Appendix 3:  8050QMA Product Spec (1)
Item  Description 
CPU 
Intel® Pentium® M Processor (Dothan) 90nm, 2M L2, 533 MHz FSB 
Intel® Celeron® M processor, 90nm, 512K L2, 400 MHz FSB 
-   CPU Thermal ceiling: 27W 
Core logic 
Intel 915PM + ICH6M 
-   Dual Channel Memory Support 
-   DDR2 400/533 
Expandable to 2048MB(P) 
System BIOS 
Inside 512KB Flash EPROM  
Include System BIOS, VGA BIOS 
ACPI2.0; 2.31 compliants 
Boot from USB mass storage device 
Memory 
-   200-pin SO-DIMM DDR2 Memory Slot x2 
-   Support DDR2  400/533 
-   0MB Memory onboard ; Expandable to 2.0GB(P) 
VGA Controller  -   Type I MXM Interface (max 25W) with 8 cells Vram 
-   Priority at launch: NV44M + 32MB discrete Vram + Turbo Memory 
ROM Drive 
12.7mm Optical Drive 
-   Combo Drive 
-   DVD Dual 
-   DVD Super Multi drive 
HDD 
One 2.5"  9.5 mm height HDD; 
-   5400/7200 RPM Serial PATA HDD 
-   40/60/80 GB Capacity 
Display  15.4" Wide WXGA TFTLCD 
-   Resolution: 1280 x 800 
Keyboard 
-   Key pitch: 19mm, Key travel: 3.0mm 
-   Windows Logo Key x 2 
-   W/z Hot Key Functions 
Touch Pad  -   Intelligence Glide pad without scroll button 
-   2 touch pad buttons 
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1.7 Appendix 3:  8050QMA Product Spec (2)
Item  Description 
Audio/AV Function 
-   AC97, support S/PDIF output  
-   5.1 channel analog output 
-    2.1 channel system speaker. two full range speakers(1W*2 Front), one subwoofer(3W) 
-   Build in microphone 
Multi Card reader  -   4 in 1 Card Reader (SD/MMC/MS/MS Pro) 
Indicator on board 
-   3 LEDs for Power/Battery status (AC In status/Battery status/Reserved Power  
-   System Status) (on inverter board) 
-   2 LEDs for HDD Access, ODD Access 
-   3 LEDs for Number lock, Caps lock, Scroll lock 
-   1 LED for Wireless on/off 
-   1 LED for Card Reader Accessing 
PC CARD  1x  Type II PCMCIA Interface without Zoom Video 
Support Support 3.3V, 5V device 
I/O Ports 
I/O: 
USB (support USB 1.1 and USB 2.0) port x 4 
Reserve 1 connector on board for USB 2.0 Device 
RJ-11 port x 1 (4Pin) 
RJ-45 port x 1  
DC input (2.5 * 5.5 * 11mm) x 1 
IEEE1394 x 1(4 pin). 
Type III B MiniPCI x 1 (For wireless LAN) 
Audio(Normal /5.1Analog output): 
Line - out/SPDIF x 1 (5.1 mode: Front 2 channels)  
Mic - in x 1 (5.1 mode: LBF/Middle channels)  
Line - in x 1 (5.1 mode: Rear 2 channels) 
Video 
DVI- I x 1 
TV-Out x 1 (7 Pin S-Video connector NTSC/PAL) 
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Item  Description 
Communication  PCI 10/100 LAN MDC 56K, V.90 Modem 
802.11g wireless LAN (Mini PCI optional) with built-in Antenna 
Power Supply  6 cell Li-ion (2400mAH/3.7V) Battery pack 
Battery Life > 3HRs 
AC adapter  Universal AC adapter 2 Pin 2.5*5.5*11 65W 19V DC output, Input: 100-240V, 50/60Hz AC
Dimensions  35mm x 250mm x 25 ~ 38mm(Max)(P) 
Weight 2.8KG (TBD) 
Manuals  EN, GR , Pan-EU 
Accessories 
AC Adapter, 
Power Cord,  
RJ-11 cable, (Option) 
SAFETY LOCK     Security Lock hole (Kensington Lock) 
Architecture  - Support PC2001 specifications; 
- WHQL-certified for Windows XP Professional/Home edition SP2 
Sales Region  Europe 
USA 
Agency  FCC, CE, CB, 
Retailer Option Summary
CPU 
Memory 
Wireless Card 
HDD 
Battery 
ODD 
MDC 
1.7 Appendix 3:  8050QMA Product Spec (3)
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2.1 System View
2.1.1 Front View
2.1.2 Left-side View
2. System View and Disassembly 
Line In Connector
MS/SD/MMC Card Slot
1394 Port
MIC In Connector
Line Out Connector
Top Cover Latch
S-Video Port
RJ-11 Connector
DVI Port
Ventilation Openings
USB Ports *2
RJ-45 Connector
PCMCIA Card Socket
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2.1.3 Right-side View
2.1.4 Rear View
Lock
AC Power Connector
USB Ports *2
CD/DVD-ROM Drive
Kensington Lock
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2.1.5 Bottom View
2.1.6 Top-open View
Hard Disk Drive
CPU
Battery Park
Stereo Speaker Set
LCD Screen
Internal MIC In
Keyboard
Stereo Speaker Set
Power Button
Device LED Indicators
Touch Pad
AC Power Indicator
Battery Charge Indicator
Battery Power Indicator
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2.2 Tools Introduction
2mm
2mm
Bit Size
#0     
Screw Size                          Tooling                      Tor.                       Bit Size
1.  M2.0                       Auto-Screw driver                 2.0-2.5 kg/cm2                   #0   
2. Auto screw driver for notebook assembly & disassembly.
1. Minus screw driver with bit size 2mm for notebook assembly & disassembly.   
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2.3 System Disassembly 
The section discusses at length each major component for disassembly/reassembly and show corresponding               
illustrations.Use the chart below to determine the disassembly sequence for removing components from the                      
notebook.
NOTE: Before you start to install/replace these modules, disconnect all peripheral devices and make  sure the 
notebook is not turned on or connected to AC power.
Modular Components
LCD Assembly Components 
Base Unit Components 
NOTEBOOK
2.3.1 Battery Pack
2.3.2 Keyboard
2.3.3 CPU
2.3.4 HDD Module
2.3.5 CD/DVD-ROM Drive
2.3.6 DDR-SDRAM
2.3.7 Modem Card
2.3.8 LCD Assembly
2.3.9 LCD Panel
2.3.10 Inverter Board
2.3.11 System Board
2.3.12 Touch Pad
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1. Carefully put the notebook upside down.
2. Slide the two release lever outwards to the  “unlock” position (), while take the battery pack out of  the
compartment (). (Figure 2-1)
1. Replace the battery pack into the compartment. The battery pack should be correctly connected when you hear a 
clicking sound.
2. Slide the release lever to the “lock” (     ) position.
2.3.1 Battery Pack 
Disassembly
Figure 2-1  Remove the battery pack
Reassembly
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2.3.2 Keyboard
1. Remove the battery pack. (Refer to section 2.3.1 Disassembly)
2. Open the top cover. 
3. Loosen the five latches locking the keyboard. (Figure 2-2)
Figure 2-2  Loose the five latches
Disassembly
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Figure 2-3 Free the keyboard
Reassembly
1. Reconnect the keyboard cable and fit the keyboard back into place. 
2. Replace the keyboard fasten the five latches.
3. Replace the battery pack. (Refer to section 2.3.1 Reassembly)
4. Slightly lift up the keyboard and disconnect the cable from the system board, then separate the keyboard.  
(Figure 2-3)
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2.3.3 CPU
Figure 2-4 Remove the seven screws Figure 2-5 Free the heatsink
Disassembly
1. Remove the battery pack. (Refer to section 2.3.1 Disassembly)
2. Remove the seven screws fastening the CPU cover. (Figure 2-4)
3. Remove the four spring screws and two screws that secure the heatsink upon the CPU and disconnect the fan’s 
power cord from the system board. (Figure 2-5)
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Reassembly
1. Carefully, align the arrowhead corner of the CPU with the beveled corner of the socket, then insert CPU pins 
into the holes. Tighten the screw by a flat screwdriver to locking the CPU.
2. Connect the fan’s power cord to the system board, fit the heatsink upon the CPU, then secure with four spring 
screws and two screws. 
3. Replace the CPU cover and secure with seven screws.
4. Replace the battery pack. (Refer to section 2.3.1 Reassembly)
4. To remove the existing CPU, loosen the screw by a flat screwdriver, upraise the CPU socket to unlock the CPU.  
(Figure 2-6)
Figure 2-6 Remove the CPU
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2.3.4 HDD Module 
Figure 2-8 Remove HDD moduleFigure 2-7 Remove the HDD compartment 
cover
Disassembly
1. Carefully put the notebook upside down. Remove the battery pack. (Refer to section 2.3.1 Disassembly)
2. Remove the two screws fastening the HDD compartment cover. (Figure 2-7)
3. Remove the one screw and slide the HDD module out of the compartment. (Figure 2-8) 
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4. Remove the four screws to separate the hard disk drive from the bracket, remove the hard disk drive. (Figure 2-9)
Reassembly
1. Attach the bracket to hard disk drive and secure with four screws.
2. Slide the HDD module into the compartment and secure with one screw.
3. Place the HDD compartment cover and secure with two screws.
4. Replace the battery pack. (Refer to section 2.3.1 Reassembly)
Figure 2-9 Remove hard disk drive
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1. Push the CD/DVD-ROM drive into the compartment and secure with one screw.
2. Replace the battery pack. (See section 2.3.1 Reassembly)
Disassembly
1. Carefully put the notebook upside down. Remove the battery pack. (See section 2.3.1 Disassembly)
2. Remove the one screw fastening the CD/DVD-ROM drive. (Figure 2-10) 
3. Insert a small rod, such as a straightened paper clip, into CD/DVD-ROM drive’s manual eject hole () and 
push firmly to release the tray. Then gently pull out the CD/DVD-ROM drive by holding the tray that pops 
out ().
2.3.5 CD/DVD-ROM Drive
Reassembly
Figure 2-10 Remove the CD/DVD-ROM drive
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1. To install the DDR, match the DDR's notched part with the socket's projected part and firmly insert the 
SO-DIMM into the socket at 20-degree angle. Then push down until the retaining clips lock the DDR into
position.
2. Replace the CPU cover and secure with seven screws. (Refer to the step 3 of section 2.3.3 Reassembly)
3. Replace the battery pack. (See section 2.3.1 Reassembly)
Disassembly
1. Carefully put the notebook upside down. Remove the battery pack. (See section 2.3.1 Disassembly)
2. Remove the seven screws fastening the CPU cover. (Refer to the step 2 of section 2.3.3 Disassembly)
2.3.6 DDR-SDRAM
3. Pull the retaining clips outwards () and remove the SO-DIMM (). (Figure 2-11)
Reassembly
Figure 2-11 Remove the SO-DIMM
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2.3.7 Modem Card
Figure 2-12 Remove two screws Figure 2-13 Disconnect the cord
1. Reconnect the cord and fit the modem card.
2. Fasten the modem card by two screws.
3. Replace the CPU cover by seven screws. (Refer to step 3 of section 2.3.3 Reassembly).
4. Replace the battery pack. (Refer to section 2.3.1 Reassembly)
Disassembly
1. Carefully put the notebook upside down. Remove the battery pack. (Refer to section 2.3.1 Disassembly)
2. Remove seven screws fastening CPU cover. (Refer to step 2 of section 2.3.3 Disassembly)
3. Remove two screws fastening the modem card. (Figure 2-12)
4. Lift up the modem card and disconnect the cord. (Figure 2-13)
Reassembly
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2.3.8 LCD ASSY
Figure 2-14 Remove the eighteen screws
and separate the antenna
Figure 2-15 Free the top cover
Disassembly
1. Remove the battery pack, keyboard, CPU, hard disk drive, CD/DVD-ROM drive, DDR and modem card. 
(See sections 2.3.1, 2.3.2, 2.3.3, 2.3.4, 2.3.5, 2.3.6 and 2.3.7 Disassembly)
2. Remove the eighteen screws fastening the housing and separate the antenna from the Mini PCI compartment. 
(Figure 2-14)
3. Disconnect the touch pad’s cable from the system board and remove the two screws, then free the top cover.
(Figure 2-15)
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4. Remove the seven screws and lift the top shielding up, then free the top shielding. (Figure 2-16)
5. Separate the antenna and disconnect the two cables from the system board. (Figure 2-17)
Figure 2-16 Remove the seven screws Figure 2-17 Disconnect the two cables 
and separate the antenna
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6. Remove the two screws and lift the two hinge covers up, then free the two hinge covers. (Figure 2-18)
7. Remove the four screws, then free the LCD assembly. (Figure 2-19)
Figure 2-18 Free the two hinge covers Figure 2-19 Free the LCD assembly
1. Attach the LCD assembly to the base unit and secure with four screws. 
2. Replace the antenna back into Mini PCI compartment.
3. Reconnect the two cables to the system board. 
4. Replace the two hinge covers and secure with two screws.
5. Replace the top shielding and secure with seven screws.
6. Replace the top cover and secure with two screws, then reconnect the touch pad’s cable into the system board.
7. Secure with eighteen screws fasten the housing.
8. Replace the modem card, DDR, CD/DVD-ROM drive, hard disk drive, CPU, keyboard and battery pack. 
(Refer to previous section reassembly) 
Reassembly
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2.3.9 LCD Panel
Disassembly
1. Remove the battery, keyboard, CPU, hard disk drive, CD/DVD-ROM drive, DDR, modem card and LCD
assembly. (Refer to section 2.3.1, 2.3.2, 2.3.3, 2.3.4, 2.3.5, 2.3.6, 2.3.7 and 2.3.8 Disassembly)
2. Remove the two rubber pads and two screws on the corners of the panel. (Figure 2-20)
3. Insert a flat screwdriver to the lower part of the LCD cover and gently pry the frame out. Repeat the process 
until the cover is completely separated from the housing.
4. Remove the ten screws and disconnect the cable. (Figure 2-21)
Figure 2-21 Remove the ten screws and 
disconnect the cable
Figure 2-20 Remove LCD cover
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Reassembly
1. Replace the cable to the LCD panel.
2. Attach the LCD panel’s brackets back to LCD panel and secure with four screws. 
3. Replace the LCD panel into LCD housing and secure with ten screws. 
4. Reconnect one cable to inverter board.
5. Fit the LCD cover and secure with two screws and rubber pads.
6. Replace the LCD assembly, modem card, DDR, CD/DVD-ROM drive, hard disk drive, CPU, keyboard and 
battery pack. (Refer to previous section reassembly) 
Figure 2-23 Free the LCD panel
5. Remove the four screws that secure the LCD brackets. (Figure 2-22)
6. Disconnect the cable to free the LCD panel. (Figure 2-23)
Figure 2-22 Remove the four screws
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2.3.10 Inverter Board
Disassembly
1. Remove the battery, keyboard, CPU, hard disk drive, CD/DVD-ROM drive, DDR, modem card, LCD 
assembly and LCD panel. (Refer to section 2.3.1, 2.3.2, 2.3.3, 2.3.4, 2.3.5, 2.3.6, 2.3.7, 2.3.8 and 2.3.9
Disassembly)
2. Remove the one screw fastening the inverter board, then free the inverter board. (Figure 2-24)
Figure 2-24 Free the inverter board
Reassembly
1. Fit the inverter board back into place and secure with one screw.  
2. Replace the LCD panel, LCD assembly, modem card, DDR, CD/DVD-ROM drive, hard disk drive, CPU  
keyboard and battery pack. (Refer to previous section reassembly) 
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2.3.11 System Board
Figure 2-25 Remove the two screws Figure 2-26 Remove the two screws
Disassembly
1. Remove the battery, keyboard, CPU, hard disk drive, CD/DVD-ROM drive, DDR, modem card and LCD 
assembly. (Refer to sections 2.3.1, 2.3.2, 2.3.3, 2.3.4, 2.3.5, 2.3.6, 2.3.7 and 2.3.8 Disassembly)
2. Remove the two screws fastening the housing. (Figure 2-25) 
3. Remove the two screws fastening the housing. (Figure 2-26)
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4. Disconnect the three speakers’ cables from the system board and separate the (R&L) rear covers. (Figure 2-27)
5. Remove the four screws and lift the system board from the housing. (Figure 2-28)
Figure 2-27 Disconnect the cables and 
separate the rear covers
Figure 2-28 Remove the four screws
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Reassembly
1. Fit the system board into the I/O bracket and secure with two screws.
2. Replace the system board into the housing and secure with four screws.
3. Reconnect the three speakers’ cables into the system board and replace the (R&L) rear covers.
4. Secure with four screws fasten the housing.
5. Replace the LCD assembly, modem card, DDR, CD/DVD-ROM drive, hard disk drive, CPU, keyboard and
battery pack. (Refer to the section 2.3.8, 2.3.7, 2.3.6, 2.3.5, 2.3.4, 2.3.3, 2.3.2 and 2.3.1 Reassembly) 
6. Remove the two screws and separate the I/O bracket from the system board, then free the system board. 
(Figure 2-29)
Figure 2-29 Free the system board
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2.3.12 Touch Pad 
1. Remove the battery pack, keyboard, CPU, hard disk drive, CD/DVD-ROM drive, DDR and modem card. 
(See sections 2.3.1, 2.3.2, 2.3.3, 2.3.4, 2.3.5, 2.3.6 and 2.3.7 Disassembly)
2. Remove the top cover. (Refer to the steps 1-3 of 2.3.8 section Disassembly) 
3. Remove the four screws and lift the shielding, then free the touch pad. (Figure 2-30)
Disassembly
Figure 2-30 Free the touch pad
Reassembly
1. Replace the touch pad, then fit the shielding and secure with two screws.
2. Replace the top cover. (Refer to the step 6 of section 2.3.8 Disassembly)
3. Replace the modem card, DDR, CD/DVD-ROM drive, hard disk drive, CPU, keyboard and battery pack.
(See sections 2.3.8, 2.3.7, 2.3.6, 2.3.5, 2.3.4, 2.3.3, 2.3.2 and 2.3.1 Reassembly)
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3. Definition & Location of Connectors / Switches 
3.1 Mother Board (Side A)
J8
J2
J1
J3
J5
J4
J7
SW3
SW4
SW2
J1 : Inverter Board Connector
J2 : LCD Panel Connector
J3 : Internal Left Speaker Connector
J4 : Touch-pad Module Connector
J5 : Internal Key-board Connector
J7 : Internal Right Speaker Connector
J8 : PCMCIA Card Connector
SW2 : Power Button
SW3 : Left Button Switch of Touch-pad
SW4 : Right Button Switch of Touch-pad
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3. Definition & Location of Connectors / Switches 
3.2 Mother Board (Side B)
J706
PJ701
J701 J716
J713
J714
J501
J703
J710 J715
J702
J502
J709
J507
J704 J503
J504
J720
J721
J508
J509
J719
J723
PJ701 : AC Adaptor Connector
J701&J706 : USB Port Connector
J702 : DVI Connector
J703 : Battery Connector
J704 : S-video Connector
J709 : RJ45 & RJ11 Connector
J710 : CD-ROM IDE Connector
J713&J714 : DDR SO-DIMM Module Socket
J715 : Hard Disk Driver Connector
J716 : Mini-PCI Connector   
J723 : MXM_Connector
J501 : Internal Subwoofer Speaker
J502 : FAN Connector
J504 : FAN Connector
J508 : MS/SD/MMC Connector
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4. Definition & Location of Major Components
4.1 Mother Board (Side A)
PU2
PU12
U13
U19
U14
PU5
PU6
PU3
U7
U18
PU2 : +3VS/+5VS Voltage Generator
PU3 : Charging Voltage Controller
PU5 :  CPU_Core Voltage Generator
PU6 : +1.5VS/+1.05VS Voltage Generator
PU12 : +1.8V_P/0.9VS_P Voltage Generate
U7 : CLOCK SYNTHERIZER
U13 : WINBOND KBC Controller
U14 : SYSTEM BIOS
U18 : SUBWOOFER AMP Controller
U19 : AUDIO AMPLIFIER
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4. Definition & Location of Major Components
4.2 Mother Board (Side B)
U710
U711
U717
U722
U724
U709
U517
U709 : Intel ICH6-M South Bridge
U710 : Intel 915PM North Bridge 
U711 : Intel Dothan CPU
U717 : LAN-RTL8100CL Controller
U722 : IEEE1394 Controller
U724 :  Serial ATA Bridge 88SA8040
U517 : Audio CODEC(ALC655)
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5.1 Intel 915PM North Bridge(1)
Host Interface Signals 
Signal Name  Type  Description 
HADS# I/O  
AGTL+  Host Address Strobe: 
The system bus owner asserts HADS# to indicate the first of two 
cycles of a request phase. The GMCH can also assert this signal for 
snoop cycles and interrupt messages. 
HBNR# I/O 
AGTL+  Host Block Next Request: 
Used to block the current request bus owner from issuing a new 
request. This signal is used to dynamically control the CPU bus 
pipeline depth. 
HBPRI# O 
AGTL+  Host Bus Priority Request: 
The GMCH is the only Priority Agent on the system bus. It asserts 
this signal to obtain the ownership of the address bus. This signal has 
priority over symmetric bus requests and will cause the current 
symmetric owner to stop issuing new transactions unless the 
HLOCK# signal was asserted. 
HBREQ0# I/O 
AGTL+  Host Bus Request 0#: 
The GMCH pulls the processor bus HBREQ0# signal low during 
HCPURST#. The signal is sampled by the processor on the 
active-to-inactive transition of HCPURST#. 
HBREQ0# should be tri-stated after the hold time requirement has 
been satisfied. 
HCPURST# O 
AGTL+  Host CPU Reset: 
The CPURST# pin is an output from the GMCH. The GMCH asserts 
HCPURST# while RSTIN# is asserted and for approximately 1 ms 
after RSTIN# is deasserted. HCPURST# allows the processor to 
begin execution in a known state. 
HDBSY# I/O 
AGTL+  Host Data Bus Busy:   
Used by the data bus owner to hold the data bus for transfers 
requiring more than one cycle. 
HDEFER# O 
AGTL+  Host Defer: 
Signals that the GMCH will terminate the transaction currently being 
snooped with either a deferred response or with a retry response. 
HDINV[3:0]# I/O 
AGTL+  Host Dynamic Bus Inversion: 
Driven along with the HFD[63:0]# signals. Indicates if the associated 
signals are inverted or not. HDINVF[3:0]# are asserted such that the 
number of data bits driven electrically low (low voltage) within the 
corresponding 16-bit group never exceeds 8. 
HDINV#       Data Bits 
HDINV[3]#      HD[63:48]# 
HDINV[2]#      HD[47:32]# 
HDINV[1]#      HD[31:16]# 
HDINV[0]#      HD[15:0]# 
Host Interface Signals (Continued) 
Signal Name  Type  Description 
HDRDY# I/O 
AGTL+ Host Data Ready: 
Asserted for each cycle that data is transferred. 
HA[31:3]# I/O 
AGTL+ 
2X 
Host Address Bus: 
HA[31:3]# connects to the CPU address bus. During processor cycles 
the HA[31:3]# are inputs. The GMCH drives HA[31:3]# during 
snoop cycles on behalf of DMI.   
HA[31:3]# are transferred at 2x rate. 
Note that the address is inverted on the CPU bus. 
HADSTB[1:0]# I/O 
AGTL+
2X 
Host Address Strobe: 
HA[31:3]# connects to the CPU address bus. During CPU cycles, the 
source synchronous strobes are used to transfer HA[31:3]# and 
HREQ[4:0]# at the 2x transfer rate. 
Strobe        Address Bits 
HADSTB[0]#     HA[16:3]#, HREQ[4:0]# 
HADSTB[1]#     HA[31:17]# 
HD[63:0]# I/O 
AGTL+
4X 
Host Data: 
These signals are connected to the CPU data bus. HD[63:0]# are 
transferred at 4x rate. 
Note that the data signals are inverted on the CPU bus depending on 
the HDINV[3:0]# signals. 
HDSTBP[3:0]# 
HDSTBN[3:0]#
I/O 
AGTL+
4X 
Host Differential Host Data Strobes: 
The differential source synchronous strobes are used to transfer 
HD[63:0]# and HDINV[3:0]# at the 4x transfer rate. 
Strobe         Data Bits 
HDSTBP[3]#,      HDSTBN[3]# HD[63:48]#, HDINV[3]# 
HDSTBP[2]#,      HDSTBN[2]# HD[47:32]#, HDINV[2]# 
HDSTBP[1]#,      HDSTBN[1]# HD[31:16]#, HDINV[1]# 
HDSTBP[0]#,      HDSTBN[0]# HD[15:00]#, HDINV[0]# 
HHIT# I/O 
AGTL+ Host Hit: 
Indicates that a caching agent holds an unmodified version of the 
requested line.   
Also, driven in conjunction with HITM# by the target to extend the 
snoop window. 
HHITM# I/O 
AGTL+ Host Hit Modified: 
Indicates that a caching agent holds a modified version of the 
requested line and that this agent assumes responsibility for providing 
the line. 
Also, driven in conjunction with HIT# to extend the snoop window. 
5. Pin Descriptions of Major Components
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5.1 Intel 915PM North Bridge(2)
Host Interface Signals (Continued) 
Signal Name  Type  Description 
HLOCK# I 
AGTL+  Host Lock: 
All CPU bus cycles sampled with the assertion of HLOCK# and 
HADS#, until the negation of HLOCK# must be atomic, i.e. PCI 
Express graphics access to System Memory is allowed when 
HLOCK# is asserted by the CPU. 
HREQ[4:0]# I/O 
AGTL+ 
2X 
Host Request Command: 
Defines the attributes of the request. HREQ[4:0]# are transferred at 
2x rate. 
Asserted by the requesting agent during both halves of the Request 
Phase. In the first half the signals define the transaction type to a level 
of detail that is sufficient to begin a snoop request. In the second half 
the signals carry additional information to define the complete 
transaction type. 
HTRDY# O 
AGTL+  Host Target Ready: 
Indicates that the target of the processor transaction is able to enter 
the data transfer phase. 
HRS[2:0]# O 
AGTL+  Host Response Status: 
Indicates the type of response according to the following the table: 
HRS[2:0]#     Response type 
000           Idle state 
001           Retry response 
010           Deferred response 
011           Reserved (not driven by GMCH) 
100           Hard Failure (not driven by GMCH) 
101           No data response 
110           Implicit Write back 
111           Normal data response 
HDPWR# O 
AGTL+  Host Data Power: 
Used by GMCH to indicate that a data return cycle is pending within 
2 HCLK cycles or more. CPU use’s this signal during a read-cycle to 
activate the data input buffers in preparation for HDRDY# and the 
related data. 
HCPUSLP# O 
CMOS  Host CPU Sleep: 
When asserted in the Stop-Grant state, causes the processor to enter 
the Sleep state. During Sleep state, the processor stops providing 
internal clock signals to all units, leaving only the Phase-Locked 
Loop (PLL) still operating. Processors in this state will not recognize 
snoops or interrupts. 
Host Interface Reference and Compensation 
Signal Name  Type  Description 
HVREF I 
A  Host Reference Voltage: 
Reference voltage input for the Data, Address, and Common clock 
signals of the Host AGTL+ interface. 
HXRCOMP I/O 
A  Host X RCOMP: 
Used to calibrate the Host AGTL+ I/O buffers.   
This signal is powered by the Host Interface termination rail (VCCP). 
HXSCOMP I/O 
A  Host X SCOMP: 
Slew Rate Compensation for the Host Interface 
HXSWING I 
A  Host X Voltage Swing: 
These signals provide reference voltages used by the HXRCOMP 
circuits. 
HYRCOMP I/O 
A  Host Y RCOMP: 
Used to calibrate the Host AGTL+ I/O buffers. 
HYSCOMP I/O 
A  Host Y SCOMP: 
Slew Rate Compensation for the Host Interface 
HYSWING I 
A  Host Y Voltage Swing: 
These signals provide reference voltages used by the HYRCOMP 
circuitry. 
DMI 
Signal Name  Type  Description 
DMI_RXP[1:0] 
DMI_RXN[1:0]
I 
PCIE  DMI input from ICH6-M: 
Direct Media Interface receive differential pair 
DMI_TXP[1:0] 
DMI_TXN[1:0]
O 
PCIE  DMI output to ICH6-M: 
Direct Media Interface transmit differential pair 
DMI x2 is supported for Intel 915GMS chipset 
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5.1 Intel 915PM North Bridge(3)
DDR / DDR2 SDRAM Channel A Interface 
Signal Name  Type  Description 
SA_DQ[63:0] I/O 
SSTL1.8/2 
2x 
Data Bus: 
DDR / DDR2 Channel A data signal interface to the SDRAM data 
bus. 
Single channel mode: Route to SO-DIMM 0 & SO-DIMM1   
Dual channel mode: Route to SO-DIMM A 
SA_DM[7:0] I/O 
SSTL1.8/2 
2x 
Data Mask: 
These signals are used to mask individual bytes of data in the case of 
a partial write, and to interrupt burst writes.   
When activated during writes, the corresponding data groups in the 
SDRAM are masked. There is one SA_DM[7:0] for every data byte 
lane. 
Single channel mode: Route to SO-DIMM 0 & SO-DIMM1   
Dual channel mode: Route to SO-DIMM A 
SA_DQS[7:0] I/O 
SSTL1.8 
2x 
Data Strobes: 
DDR: The rising and falling edges of SA_DQS[7:0] are used for 
capturing data during read and write transactions. 
DDR2: SA_DQS[7:0] and its complement signal group make up a 
differential strobe pair. The data is captured at the crossing point of 
SA_DQS[7:0] and its SA_DQS[7:0]# during read and write 
transactions. 
Single channel mode: Route to SO-DIMM 0 & SO-DIMM1   
Dual channel mode: Route to SO-DIMM A 
SA_DQS[7:0]# I/O 
SSTL1.8 
2x 
Data Strobe Complements 
DDR1: No Connect. These signals are not used for DDR devices   
DDR2 : These are the complementary DDR2 strobe signals. 
Single channel mode: Route to SO-DIMM 0 & SO-DIMM1   
Dual channel mode: Route to SO-DIMM A 
SA_MA[13:0] O 
SSTL1.8/2  Memory Address: 
These signals are used to provide the multiplexed row and column 
address to the SDRAM. 
Single channel mode: Route to SO-DIMM 0 
Dual channel mode: Route to SO-DIMM A 
Note: SA_MA13 is for support of 1 Gb devices. 
SA_BS[2:0] O 
SSTL1.8/2  Bank Select: 
These signals define which banks are selected within each SDRAM 
rank. 
Single channel mode: Route to SO-DIMM 0 
Dual channel mode: Route to SO-DIMM A 
Note: SA_BS2 is for support for DDR2 only for 8 bank devices. 
DDR / DDR2 SDRAM Channel A Interface (Continued) 
Signal Name  Type  Description 
SA_RAS# O 
SSTL1.8/2 RAS Control signal: 
Used with SA_CAS# and SA_WE# (along with SM_CS#) to define 
the SDRAM commands.   
Single channel mode: Route to SO-DIMM 0 
Dual channel mode: Route to SO-DIMM A 
SA_CAS# O 
SSTL1.8/2 CAS Control signal: 
Used with SA_RAS# and SA_WE# (along with SM_CS#) to define 
the SDRAM commands. 
Single channel mode: Route to SO-DIMM 0 
Dual channel mode: Route to SO-DIMM A 
SA_WE# O 
SSTL1.8/2 Write Enable Control signal: 
Used with SA_RAS# and SA_CAS# (along with SM_CS#) to define 
the SDRAM commands. 
Single channel mode: Route to SO-DIMM 0 
Dual channel mode: Route to SO-DIMM A 
SA_RCVENIN# O 
SSTL1.8/2 Clock Input: 
Used to emulate source-synch clocking for reads. Connects internally 
to SA_RCVENOUT#. 
Leave as No Connect. 
SA_RCVENOUT
# 
O 
SSTL1.8/2 Clock Output: 
Used to emulate source-synch clocking for reads. Connects internally 
to SA_RCVENIN#. 
Leave as No Connect. 
PCI Express Based Graphics Interface Signals 
Signal Name  Type  Description 
EXP_RXN[15:0] 
EXP_RXP[15:0]
I 
PCIE 
PCI Express Receive Differential Pair 
EXP_TXN[15:0] 
EXP_TXP[15:0]
O 
PCIE 
PCI Express Transmit Differential Pair 
EXP_ICOMPO I 
A 
PCI Express Output Current and Resistance Compensation 
EXP_COMPI I 
A 
PCI Express Input Current Compensation 
PCI Express Based Graphics is supported for Intel 915GM and Intel 915PM chipsets. 
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5.1 Intel 915PM North Bridge(4)
DDR / DDR2 SDRAM Channel B Interface 
Signal Name  Type  Description 
SB_DQ[63:0] I/O 
SSTL1.8/2 
2x 
Data Lines: 
DDR / DDR2 Channel B data signal interface to the SDRAM data 
bus. 
Single Channel mode: No connect. 
Dual channel mode: Route to SO-DIMM B 
NOTE: Signals do not exist in Intel 915GMS. 
SB_DM[7:0] O 
SSTL1.8/2 
2x 
Data Mask: 
When activated during writes, the corresponding data groups in the 
SDRAM are masked. There is one SB_DM[7:0] for every data byte 
lane. These signals are used to mask individual bytes of data in the 
case of a partial write, and to interrupt burst writes. 
Single Channel mode: No connect. 
Dual channel mode: Route to SO-DIMM B 
NOTE: Signals do not exist in Intel 915GMS. 
SB_DQS[7:0] I/O 
SSTL1.8/2 
2x 
Data Strobes: 
DDR: The rising and falling edges of SB_DQS[7:0] are used for 
capturing data during read and write transactions.   
DDR2: SB_DQS[7:0] and its complement signal group make up a 
differential strobe pair. The data is captured at the crossing point of 
SB_DQS[7:0] and its SB_DQS[7:0]# during read and write 
transactions. 
Single Channel mode: No connect. 
Dual channel mode: Route to SO-DIMM B 
NOTE: Signals do not exist in Intel 915GMS. 
SB_DQS[7:0]# I/O 
SSTL1.8 
2x 
Data Strobe Complements (DDR2 only): 
DDR1: No Connect. These signals are not used for DDR devices 
DDR2 : These are the complementary DDR2 strobe signals. 
Single Channel mode: No connect. 
Dual channel mode: Route to SO-DIMM B 
NOTE: Signals do not exist in Intel 915GMS. 
SB_MA[13:0] O 
SSTL1.8/2  Memory Address: 
These signals are used to provide the multiplexed row and column 
address to the SDRAM. 
Single channel mode: Route to SO-DIMM 1 
Dual channel mode: Route to SO-DIMM B 
NOTE: SB_MA13 is for support of 1 Gb devices. 
SB_BS[2:0] O 
SSTL1.8/2  Bank Select: 
These signals define which banks are selected within each 
SDRAM rank.   
Single channel mode: Route to SO-DIMM 1 
Dual channel mode: Route to SO-DIMM B 
NOTE: SB_BS2 is for DDR2 support only. 
DDR / DDR2 SDRAM Channel B Interface (Continued) 
Signal Name  Type  Description 
SB_RAS# O 
SSTL1.8/2 RAS Control signal: 
Used with SB_CAS# and SB_WE# (along with SM_CS#) to define 
the SDRAM commands. 
Single channel mode: Route to SO-DIMM 1 
Dual channel mode: Route to SO-DIMM B 
SB_CAS# O 
SSTL1.8/2 CAS Control signal: 
Used with SB_RAS# and SB_WE# (along with SM_CS#) to define 
the SDRAM commands. 
Single channel mode: Route to SO-DIMM 1 
Dual channel mode: Route to SO-DIMM B 
SB_WE# O 
SSTL1.8/2 Write Enable Control signal: 
Used with SB_RAS# and SB_CAS# (along with SM_CS#) to define 
the SDRAM commands. 
Single channel mode: Route to SO-DIMM 1 
Dual channel mode: Route to SO-DIMM B 
SB_RCVENIN# I 
SSTL1.8/2 Clock Input: 
Used to emulate source-synch clocking for reads. 
Leave as No Connect. 
NOTE: Signals do not exist in Intel 915GMS. 
SB_RCVENOUT
# O 
SSTL1.8/2 Clock Output: 
Used to emulate source-synch clocking for reads. 
Leave as No Connect. 
NOTE: Signals do not exist in Intel 915GMS. 
DMI 
Signal Name  Type  Description 
DMI_RXP[3:0] 
DMI_RXN[3:0]
I 
PCIE  DMI input from ICH6-M: 
Direct Media Interface receive differential pair 
DMI_TXP[3:0] 
DMI_TXN[3:0]
O 
PCIE  DMI output to ICH6-M: 
Direct Media Interface transmit differential pair 
DMI x2 or x4 is supported for Intel 915GM, Intel 915PM and Intel 910GML chipsets. 
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5.1 Intel 915PM North Bridge(5)
DDR / DDR2 Common Signals 
Signal Name  Type  Description 
SM_CK[1:0], 
SM_CK[4:3] O 
SSTL1.8/2  SDRAM Differential Clock: 
The crossing of the positive edge of SM_CKx and the negative edge 
of its complement SM_CKx# are used to sample the command and 
control signals on the SDRAM. 
SM_CK[0:1] and its complement SM_CK[1:0]# signal make a 
differential clock pair output. 
Single channel mode: Route to SO-DIMM 0 
Dual channel mode: Route to SO-DIMM A 
SM_CK[4:3] and its complement SM_CK[4:3]# signal make a 
differential clock pair output. 
Single channel mode: Route to SO-DIMM 1 
Dual channel mode: Route to SO-DIMM B 
NOTE: SM_CK2 and SM_CK5 are reserved and not supported. 
SM_CK[1:0]#, 
SM_CK[4:3]# O 
SSTL1.8/2  SDRAM Inverted Differential Clock: 
These are the complementary Differential DDR2 Clock signals. 
NOTE: SM_CK2# and SM_CK5# are reserved and not supported. 
SM_CS[3:0]# O 
SSTL1.8/2  Chip Select: (1 per Rank): 
These signals select particular SDRAM components during the active 
state. There is one Chip Select for each SDRAM rank 
SM_CS[1:0]# : 
Single channel mode: Route to SO-DIMM 0 
Dual channel mode: Route to SO-DIMM A 
SM_CS[3:2]# : 
Single channel mode: Route to SO-DIMM 1 
Dual channel mode: Route to SO-DIMM B 
SM_CKE[3:0] O 
SSTL1.8/2  Clock Enable: (1 per Rank): 
SM_CKE[3:0] is used: 
.To initialize the SDRAMs during power-up 
.To power-down SDRAM ranks 
. To place all SDRAM ranks into and out of self-refresh during STR.
SM_CKE[1:0]: 
Single channel mode: Route to SO-DIMM 0 
Dual channel mode: Route to SO-DIMM A 
SM_CKE[3:2]: 
Single channel mode: Route to SO-DIMM 1 
Dual channel mode: Route to SO-DIMM B 
DDR / DDR2 Common Signals (Continued) 
Signal Name  Type  Description 
SM_ODT[3:0] O 
SSTL1.8/2 On Die Termination: Active Termination Control. (DDR2 only) 
SM_ODT[1:0]: 
Single channel mode: Route to SO-DIMM 0 
Dual channel mode: Route to SO-DIMM A 
Signal Description 
The crossing of the positive edge of SM_CKx and the negative edge 
of its 
complement SM_CKx# are used to sample the command and control 
SM_CK[0:1] and its complement SM_CK[1:0]# signal make a 
differential 
SM_CK[4:3] and its complement SM_CK[4:3]# signal make a 
differential 
NOTE: SM_CK2 and SM_CK5 are reserved and not supported. 
These are the complementary Differential DDR2 Clock signals. 
NOTE: SM_CK2# and SM_CK5# are reserved and not supported. 
These signals select particular SDRAM components during the active 
To place all SDRAM ranks into and out of self-refresh during STR. 
On Die Termination: Active Termination Control. (DDR2 only) 
SM_ODT[3:2]: 
Single channel mode: Route to SO-DIMM 1 
Dual channel mode: Route to SO-DIMM B 
DDR: Leave as no connects. Not used for DDR devices. 
DDR2: On-die termination for DDR2 devices. 
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5.1 Intel 915PM North Bridge(6)
CRT DAC Signals 
Signal Name  Type  Description 
RED O 
A  RED Analog Video Output: 
This signal is a CRT Analog video output from the internal color 
palette DAC. 
RED# O 
A  RED# Analog Output: 
This signal is an analog video output from the internal color palette 
DAC. This signal is used to provide noise immunity. 
GREEN O 
A  GREEN Analog Video Output: 
This signal is a CRT Analog video output from the internal color 
palette DAC. 
GREEN# O 
A  GREEN# Analog Output: 
This signal is an analog video output from the internal color palette 
DAC. This signal is used to provide noise immunity. 
BLUE O 
A  BLUE Analog Video Output: 
This signal is a CRT Analog video output from the internal color 
palette DAC. 
BLUE# O 
A  BLUE# Analog Output: 
This signal is an analog video output from the internal color palette 
DAC. This signal is used to provide noise immunity. 
REFSET O 
A  Resistor Set: 
Set point resistor for the internal color palette DAC. A 256-Ω ± 1% 
resistor is required between REFSET and motherboard ground. 
HSYNC O 
HVCMOS  CRT Horizontal Synchronization: 
This signal is used as the horizontal sync (polarity is programmable) 
or “sync interval”. 
VSYNC O 
HVCMOS  CRT Vertical Synchronization: 
This signal is used as the vertical sync (polarity is programmable). 
Analog TV-out Signals 
Signal Name  Type  Description 
TVDAC_A O 
A  TVDAC Channel A Output: 
TVDAC_A supports the following: 
Composite: CVBS signal 
Component: Chrominance (Pb) analog signal 
TVDAC_B O 
A  TVDAC Channel B Output: 
TVDAC_B supports the following: 
S-Video: Luminance analog signal 
Component: Luminance (Y) analog signal 
TVDAC_C O 
A  TVDAC Channel C Output: 
TVDAC_C supports the following: 
S-Video: Chrominance analog signal 
Component: Chrominance (Pr) analog signal 
TV_IRTNA O 
A  Current Return for TVDAC Channel A: 
Connect to ground on board 
TV_IRTNB O 
A  Current Return for TVDAC Channel B: 
Connect to ground on board 
TV_IRTNC O 
A  Current Return for TVDAC Channel C: 
Connect to ground on board 
TV_REFSET O 
A  TV Resistor set: 
TV Reference Current uses an external resistor to set internal 
reference voltage levels. A 5-k §Ù ± 0.5% resistor is required 
between REFSET and motherboard ground. 
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5.1 Intel 915PM North Bridge(7)
LVDS Signals 
Signal Name  Type  Description 
LDVS Channel A 
LADATAP[2:0] I/O 
LVDS 
Channel A differential data output - positive 
LADATAN[2:0] I/O 
LVDS 
Channel A differential data output –negative 
LACLKP I/O 
LVDS 
Channel A differential clock output – positive 
LACLKN I/O 
LVDS 
Channel A differential clock output – negative 
LDVS Channel B 
LBDATAP[2:0] I/O 
LVDS 
Channel B differential data output – positive 
NOTE: Signals do not exist in Intel 915GMS. 
LBDATAN[2:0] I/O 
LVDS 
Channel B differential data output –negative 
NOTE: Signals do not exist in Intel 915GMS. 
LBCLKP I/O 
LVDS 
Channel B differential clock output – positive 
NOTE: Signals do not exist in Intel 915GMS. 
LBCLKN I/O 
LVDS 
Channel B differential clock output – negative 
NOTE: Signals do not exist in Intel 915GMS. 
LFP Panel power and backlight control 
LVDD_EN O 
HVCMOS
LVDS panel power enable: Panel power control enable control. 
This signal is also called VDD_DBL in the CPIS specification and is 
used to control the VDC source to the panel logic. 
LBKLT_EN O 
HVCMOS
LVDS backlight enable: Panel backlight enable control.   
This signal is also called ENA_BL in the CPIS specification and is 
used to gate power into the backlight circuitry. 
LBKLT_CRTL O 
HVCMOS
Panel backlight brightness control: Panel brightness control. 
This signal is also called VARY_BL in the CPIS specification and is 
used as the PWM Clock input signal. 
LVDS Reference signals 
LIBG I/O 
Ref 
LVDS Reference Current. – 
1.5 kΩ Pull down resistor needed 
LVREFH I 
Ref 
Reserved. - No connect. 
LVREFL I 
Ref 
Reserved. - No connect. 
LVBG O 
A 
Reserve. - No connect 
Note: LVDS Channel B interface is not supported and do not exist for Intel 915GMS 
DDR SDRAM Reference and Compensation 
Signal Name  Type  Description 
SMRCOMPN I/O 
A  System Memory RCOMP N: 
Buffer compensation 
This signal is powered by the System Memory rail (2.5 V for DDR, 
1.8 V for DDR2). 
SMRCOMPP I/O 
A  System Memory RCOMP P: 
Buffer compensation 
This signal is powered by the System Memory rail 
SMXSLEWIN I 
A  X Buffer Slew Rate Input control. 
SMXSLEWOUT O 
A  X Buffer Slew Rate Output control. 
SMYSLEWIN I 
A  Y Buffer Slew Rate Input control. 
SMYSLEWOUT O 
A  Y Buffer Slew Rate Output control. 
SMVREF[1:0] I 
A  SDRAM Reference Voltage: 
Reference voltage inputs for each DQ, DQS, & RCVENIN#. 
Also used during ODT RCOMP. 
SMOCDCOMP[1
:0] I 
A  On-Die DRAM OCD driver compensation 
OCD compensation 
Display Data Channel (DDC) and GMBUS Support 
Signal Name  Type  Description 
LCTLA_CLK I/O 
COD 
I2C Based control signal (Clock) for External SSC clock chip 
control – 
LCTLB_DATA I/O 
COD 
I2C Based control signal (Data) for External SSC clock chip control –
DDCCLK I/O 
COD 
CRT DDC clock monitor control support 
DDCDATA I/O 
COD 
CRT DDC Data monitor control support 
LDDC_CLK I/O 
COD 
EDID support for flat panel display 
LDDC_DATA I/O 
COD 
EDID support for flat panel display 
SDVOCTRL_CL
K I/O 
COD 
I2C Based control signal (Clock) for SDVO device 
SDVOCTRL_DA
TA I/O 
COD 
I2C Based control signal (Data) for SDVO device 
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5.1 Intel 915PM North Bridge(8)
Serial DVO Interface. 
Signal Name  Type  Description 
SDVO B Interface 
SDVOB_CLKP O 
PCIE 
Serial Digital Video B Clock. 
Multiplexed with EXP_TXP_3. 
SDVOB_CLKN O 
PCIE 
Serial Digital Video B Clock Complement. 
Multiplexed with EXP_TXN_3. 
SDVOB_RED O 
PCIE 
Serial Digital Video B Red Data. 
Multiplexed with EXP_TXP_0. 
SDVOB_RED# O 
PCIE 
Serial Digital Video B Red Data Complement. 
Multiplexed with EXP_TXN_0. 
SDVOB_GREEN O 
PCIE 
Serial Digital Video B Green Data. 
Multiplexed with EXP_TXP_1. 
SDVOB_GREEN
# O 
PCIE 
Serial Digital Video B Green Data Complement. 
Multiplexed with EXP_TXN_1. 
SDVOB_BLUE O 
PCIE 
Serial Digital Video B Blue Data. 
Multiplexed with EXP_TXP_2. 
SDVOB_BLUE# O 
PCIE 
Serial Digital Video B Blue Data Complement. 
Multiplexed with EXP_TXN_2. 
SDVO C Interface 
SDVOC_RED O 
PCIE 
Serial Digital Video C Red Data / SDVO B Alpha. 
Multiplexed with EXP_TXP_4. 
NOTE: Signals do not exist in Intel 915GMS.. 
SDVOC_RED# O 
PCIE 
Serial Digital Video C Red Complement / Alpha Complement. 
Multiplexed with EXP_TXN_4. 
NOTE: Signals do not exist in Intel 915GMS. 
SDVOC_GREEN O 
PCIE 
Serial Digital Video C Green. 
Multiplexed with EXP_TXP_5. 
NOTE: Signals do not exist in Intel 915GMS. 
SDVOC_GREEN
# 
O 
PCIE 
Serial Digital Video C Green Complement. 
Multiplexed with EXP_TXN_5. 
NOTE: Signals do not exist in Intel 915GMS. 
SDVOC_BLUE O 
PCIE 
Serial Digital Video Channel C Blue. 
Multiplexed with EXP_TXP_6. 
NOTE: Signals do not exist in Intel 915GMS. 
SDVOC_BLUE# O 
PCIE 
Serial Digital Video C Blue Complement. 
Multiplexed with EXP_TXN_6. 
NOTE: Signals do not exist in Intel 915GMS. 
Serial DVO Interface (Continued) 
Signal Name  Type  Description 
SDVO C Interface 
SDVOC_CLKP O 
PCIE 
Serial Digital Video C Clock. 
Multiplexed with EXP_TXP_7. 
NOTE: Signals do not exist in Intel 915GMS. 
SDVOC_CLKN O 
PCIE 
Serial Digital Video C Clock Complement. 
Multiplexed with EXP_TXN_7. 
NOTE: Signals do not exist in Intel 915GMS. 
SDVO Common Signals 
SDVO_TVCLKI
N 
I 
PCIE 
Serial Digital Video TVOUT Synchronization Clock. 
Multiplexed with EXP_RXP_0. 
SDVO_TVCLKI
N# 
I 
PCIE 
Serial Digital Video TV-out Synchronization Clock Complement. 
Multiplexed with EXP_RXN_0. 
SDVO_FLDSTA
LL 
I 
PCIE 
Serial Digital Video Field Stall. 
Multiplexed with EXP_RXP_2. 
SDVO_FLDSTA
LL# 
I 
PCIE 
Serial Digital Video Field Stall Complement. 
Multiplexed with EXP_RXN_2. 
SDVOB_INT I 
PCIE 
Serial Digital Video Input Interrupt. 
Multiplexed with EXP_RXP_1. 
SDVOB_INT# I 
PCIE 
Serial Digital Video Input Interrupt Complement. 
Multiplexed with EXP_RXN_1. 
SDVOC_INT I 
PCIE 
Serial Digital Video Input Interrupt. 
Multiplexed with EXP_RXP_5. 
SDVOC_INT# I 
PCIE 
Serial Digital Video Input Interrupt Complement. 
Multiplexed with EXP_RXN_5. 
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5.1 Intel 915PM North Bridge(9)
PLL Signals 
Signal Name  Type  Description 
HCLKP I 
Diff Clk Differential Host Clock In: 
Differential clock input for the Host PLL. Used for phase cancellation 
for FSB transactions. This clock is used by all of the GMCH logic 
that is in the Host clock domain. Also used to generate core and 
system memory internal clocks. This is a low voltage differential 
signal and runs at ¼ the FSB data rate. 
HCLKN I 
Diff Clk Differential Host Clock Input Complement: 
GCLKP I 
Diff Clk Differential PCI Express based Graphics / DMI Clock In: 
These pins receive a differential 100 MHz Serial Reference clock 
from the external clock synthesizer. This clock is used to generate the 
clocks necessary for the support of PCI Express. 
GCLKN I 
Diff Clk Differential PCI Express based Graphics / DMI Clock In 
complement 
DREF_CLKP I 
Diff Clk Display PLLA Differential Clock In – 
Display PLL Differential Clock In, no SSC support – 
DREF_CLKN I 
Diff Clk Display PLLA Differential Clock In Complement – 
Display PLL Differential Clock In Complement - no SSC support 
DREF_SSCLKP I 
Diff Clk Display PLLB Differential Clock In – 
Optional Display PLL Differential Clock In for SSC support – 
NOTE: Differential Clock input for optional SSC support for LVDS 
display. 
DREF_SSCLKN I 
Diff Clk Display PLLB Differential Clock In complement – 
Optional Display PLL Differential Clock In Complement for SSC 
support 
NOTE: Differential Clock input for optional SSC support for LVDS 
display. 
Note: PLL interfaces signal group are supported the Mobile Intel 915GM/PM/GMS and Intel   
910GML Express chipsets, unless otherwise noted. 
Reset and Miscellaneous Signals 
Signal Name  Type  Description 
RSTIN# I 
HVCMOS  Reset In: 
When asserted this signal will asynchronously reset the GMCH logic. 
This signal is connected to the PLT_RST# output of the ICH6-M. 
This input has a Schmitt trigger to avoid spurious resets. This input 
buffer is 3.3-V tolerant. 
PWROK I 
HVCMOS  Power OK: 
When asserted, PWROK is an indication to the GMCH that core 
power has been stable for at least 10 µs. 
This input buffer is 3.3-V tolerant. 
H_BSEL [2:0] 
 (CFG[2:0]) I 
HVCMOS  Host Bus Speed Select: 
At the deassertion of RSTIN#, the value sampled on these pins 
determines the expected frequency of the bus. 
External pull-ups are required. 
CFG[17:3] I 
AGTL+  HW straps: 
CFG [17:3] has internal pull up. 
NOTE: Not all CFG Balls are supported for Intel 915GMS. 
CFG[20:18] I 
HVCMOS  HW straps: 
CFG [20:18] has internal pull down 
NOTE: Not all CFG Balls are supported for Intel 915GMS. 
BM_BUSY# O 
HVCMOS  GMCH Integrated Graphics Busy: 
Indicates to the ICH that the integrated graphics engine within the 
MCH is busy and transitions to low power states should not be 
attempted until that is no longer the case. 
THRMTRIP# O 
COD  GMCH Thermal Trip: 
Assertion of THERMTRIP# (Thermal Trip) indicates the GMCH 
junction temperature has reached a level beyond which damage may 
occur. Upon assertion of THERMTRIP#, the GMCH will shut off its 
internal clocks (thus halting program execution) in an attempt to 
reduce the GMCH core junction temperature. To protect GMCH, its 
core voltage (Vcc) must be removed following the assertion of 
THERMTRIP#. Once activated,    THERMTRIP# remains latched 
until RSTIN# is asserted. While the assertion of the RSTIN# signal 
will deassert THERMTRIP#, if the GMCH’s junction temperature 
remains at or above the trip level, THERMTRIP# will again be 
asserted. 
EXT_TS[1:0]# I 
HVCMOS  External Thermal Sensor Input: 
If the system temperature reaches a dangerously high value then this 
signal can be used to trigger the start of system memory throttling. 
NOTE: EXT_TS1# functionality is not supported in 915GMS. A pull 
up is required on this pin 
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5.1 Intel 915PM North Bridge(10)
Power and Ground 
Interface Ball Name Description 
Host VTT (VCCP)  FSB power supply (1.05 V) - (VCCP) 
VCCA_SM  VCCASM is the Analog power supply for SM data buffers used for 
DLL & other logic (1.5 V) 
DRAM 
VCCSM  System memory power supply (DDR=2.5 V; DDR2=1.8 V) 
VCC3G  PCI Express / DMI Analog power supply (1.5 V) 
VCCA_3GBG  PCI Express / DMI band gap power supply (2.5 V) 
PCI Express 
Based 
Graphics /DMI VSSA_3GBG  PCI Express / DMI band gap ground 
VCCA_HPLL  Power supply for the Host VCO in the host/mem/core PLL (1.5 V)
VCCA_MPLL  Power supply for the mem VCO in the host/mem/core PLL (1.5 V)
VCCD_HMPL
L 
Power Supply for the digital dividers in the HMPLL (1.5 V) 
VCCA_3GPLL  Power supply for the 3GIO PLL (1.5 V) 
VCCA_DPLL
A 
Display A PLL power supply (1.5 V) 
PLL Analog 
VCCA_DPLL
B 
Display B PLL power supply (1.5 V) 
High Voltage 
Interfaces VCCHV  Power supply for the HV buffers (2.5 V) 
VCCA_CRTD
AC 
Analog power supply for the DAC (2.5 V) 
VSSA_CRTD
AC 
Analog ground for the DAC 
CRT DAC 
VCC_SYNC  Power supply for HSYNC/ VSYNC (2.5 V) 
VCCD_LVDS  Digital power supply (1.5 V) 
VCCTX_LVD
S 
Data/Clk Tx power supply (2.5 V) 
VCCA_LVDS  LVDS analog power supply (2.5 V) 
LVDS 
VSSALVDS LVDS analog VSS 
Power and Ground (Continued) 
Interface Ball Name Description 
VCCA_TVBG TV DAC Band Gap Power (3.3 V) 
VSSA_TVBG TV DAC Band Gap VSS 
VCCD_TVDA
C 
Dedicated Power Supply for TVDAC (1.5 V) 
VCCDQ_TVD
AC 
Power Supply for Digital Quiet TVDAC (1.5 V) 
VCCA_TVDA
CA 
Power Supply for TV Out Channel A (3.3 V) 
VCCA_TVDA
CB 
Power Supply for TV Out Channel B (3.3 V) 
TVDAC 
VCCA_TVDA
CC 
Power Supply for TV Out Channel C (3.3 V) 
Core VCC  Core VCC – (1.05 V or 1.5 V) 
Ground VSS Ground 
Non-Critical To Function power signals: 
“NCTF” (Non-Critical To Function) have been designed into the package footprint 
to enhance the Solder Joint Reliability of our products by absorbing some of the 
stress introduced by the Characteristic Thermal Expansion (CTE) mismatch of the 
Die to package interface. It is expected that in some cases, these balls may crack 
partially or completely, however, this will have no impact to our product 
performance or reliability. Intel has added these balls primarily to serve as sacrificial 
stress absorbers. 
NOTE: Signals do not exist in Intel 915GMS. 
VTT_NCTF NCTF FSB power supply (1.05 V or 1.2 V) 
VCC_NCTF NTCF Core VCC – (1.05 V or 1.5 V) 
VCCSM_NCT
F 
NTCF System memory power supply (DDR=2.5 V; DDR2=1.8 V) 
NCTF 
VSS_NCTF NTCF Ground 
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5.2 Intel ICH6-M South Bridge(1)
PCI Interface Signals   
Name Type Description 
AD[31:0] I/O  PCI Address/Data: AD[31:0] is a multiplexed address and data bus. 
During the first clock of a transaction, AD[31:0] contain a physical 
address (32 bits). During subsequent clocks, AD[31:0] contain data. 
The Intel® ICH6 will drive all 0s on AD[31:0] during the address 
phase of all PCI Special Cycles. 
C/BE[3:0]#  I/O  Bus Command and Byte Enables: The command and byte enable 
signals are multiplexed on the same PCI pins. During the address 
phase of a transaction, 
C/BE[3:0]# define the bus command. During the data phase 
C/BE[3:0]# define the Byte Enables. 
C/BE[3:0]#   Command Type 
0000b        Interrupt Acknowledge 
0001b        Special Cycle 
0010b        I/O Read 
0011b        I/O Write 
0110b        Memory Read 
0111b        Memory Write 
1010b        Configuration Read 
1011b        Configuration Write 
1100b        Memory Read Multiple 
1110b        Memory Read Line 
1111b        Memory Write and Invalidate 
All command encodings not shown are reserved. The ICH6 does not 
decode reserved values, and therefore will not respond if a PCI master 
generates a cycle using one of the reserved values. 
DEVSEL#  I/O  Device Select: The ICH6 asserts DEVSEL# to claim a PCI 
transaction. As an output, the ICH6 asserts DEVSEL# when a PCI 
master peripheral attempts an access to an internal ICH6 address or an 
address destined DMI (main memory or graphics). As an input, 
DEVSEL# indicates the response to an ICH6-initiated transaction on 
the PCI bus. DEVSEL# is tri-stated from the leading edge of 
PLTRST#. DEVSEL# remains tri-stated by the ICH6 until driven by 
a target device. 
FRAME#  I/O  Cycle Frame: The current initiator drives FRAME# to indicate the 
beginning and duration of a PCI transaction. While the initiator 
asserts FRAME#, data transfers continue. When the initiator negates 
FRAME#, the transaction is in the final data phase. FRAME# is an 
input to the ICH6 when the ICH6 is the target, and FRAME# is an 
output from the ICH6 when the ICH6 is the initiator. FRAME# 
remains tri-stated by the ICH6 until driven by an initiator. 
PCI Interface Signals (Continued)
Name Type Description 
IRDY#  I/O  Initiator Ready: IRDY# indicates the ICH6's ability, as an initiator, 
to complete the current data phase of the transaction. It is used in 
conjunction with TRDY#. A data phase is completed on any clock 
both IRDY# and TRDY# are sampled asserted. During a write, 
IRDY# indicates the ICH6 has valid data present on AD[31:0]. 
During a read, it indicates the ICH6 is prepared to latch data. IRDY# 
is an input to the ICH6 when the ICH6 is the target and an output 
from the ICH6 when the ICH6 is an initiator. IRDY# remains 
tri-stated by the ICH6 until driven by an initiator. 
TRDY#  I/O  Target Ready: TRDY# indicates the ICH6's ability as a target to 
complete the current data phase of the transaction. TRDY# is used in 
conjunction with IRDY#. A data phase is completed when both 
TRDY# and IRDY# are sampled asserted. 
During a read, TRDY# indicates that the ICH6, as a target, has placed 
valid data on AD[31:0]. During a write, TRDY# indicates the ICH6, 
as a target is prepared to latch data. TRDY# is an input to the ICH6 
when the ICH6 is the initiator and an output from the ICH6 when the 
ICH6 is a target. TRDY# is tri-stated from the leading edge of 
PLTRST#. TRDY# remains tri-stated by the ICH6 until driven by a 
target. 
STOP#  I/O  Stop: STOP# indicates that the ICH6, as a target, is requesting the 
initiator to stop the current transaction. STOP# causes the ICH6, as an 
initiator, to stop the current transaction. STOP# is an output when the 
ICH6 is a target and an input when the ICH6 is an initiator. 
PAR  I/O  Calculated/Checked Parity: PAR uses “even” parity calculated on 
36 bits, AD[31:0] plus C/BE[3:0]#. “Even” parity means that the 
ICH6 counts the number of one within the 36 bits plus PAR and the 
sum is always even. The ICH6 always calculates PAR on 36 bits 
regardless of the valid byte enables. The ICH6 generates PAR for 
address and data phases and only guarantees PAR to be valid one PCI 
clock after the corresponding address or data phase. The ICH6 drives 
and tri-states PAR identically to the AD[31:0] lines except that the 
ICH6 delays PAR by exactly one PCI clock. PAR is an output during 
the address phase (delayed one clock) for all ICH6 initiated 
transactions. PAR is an output during the data phase (delayed one 
clock) when the ICH6 is the initiator of a PCI write transaction, and 
when it is the target of a read transaction. ICH6 checks parity when it 
is the target of a PCI write transaction. If a parity error is detected, the 
ICH6 will set the appropriate internal status bits, and has the option to 
generate an NMI# or SMI#. 
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PCI Interface Signals (Continued) 
Name Type Description 
PERR#  I/O  Parity Error: An external PCI device drives PERR# when it receives 
data that has a parity error. The ICH6 drives PERR# when it detects a 
parity error. The ICH6 can either generate an NMI# or SMI# upon 
detecting a parity error (either detected internally or reported via the 
PERR# signal). 
REQ[0:3]# 
REQ[4]# / GPI[40] 
REQ[5]# / GPI[1] 
REQ[6]# / GPI[0] 
I  PCI Requests: The ICH6 supports up to 7 masters on the PCI bus. 
The REQ[4]#, REQ[5]#, and REQ[6]# pins can instead be used as a 
GPI. 
GNT[0:3]# 
GNT[4]# / 
GPO[48] 
GNT[5]# / 
GPO[17]# 
GNT[6]# / 
GPO[16]# 
O  PCI Grants: The ICH6 supports up to 7 masters on the PCI bus. The 
GNT[4]# pin can instead be used as a GPO. 
Pull-up resistors are not required on these signals. If pull-ups are 
used, they should be tied to the Vcc3_3 power rail. 
GNT[5]#/GPO[17] and GNT[6]#/GPO[17] both have an internal 
pull-up. 
NOTE: GNT[6] is sampled at the rising edge of PWROK as a 
functional strap. See Section 2.22.1 for more details. There is a weak, 
integrated pull-up resistor on the GNT[6] pin. 
PCICLK  I  PCI Clock: This is a 33 MHz clock. PCICLK provides timing for all 
transactions on the PCI Bus. 
PCIRST#  O  PCI Reset: This is the Secondary PCI Bus reset signal. It is a logical 
OR of the primary interface PLTRST# signal and the state of the 
Secondary Bus Reset bit of the Bridge Control register (D30:F0:3Eh, 
bit 6).   
NOTE: PCIRST# is in the VccSus3_3 well. 
PLOCK#  I/O  PCI Lock: This signal indicates an exclusive bus operation and may 
require multiple transactions to complete. ICH6 asserts PLOCK# 
when it performs non-exclusive transactions on the PCI bus. 
PLOCK# is ignored when PCI masters are granted the bus. 
SERR#  OD I/O  System Error: SERR# can be pulsed active by any PCI device that 
detects a system error condition. Upon sampling SERR# active, the 
ICH6 has the ability to generate an NMI, SMI#, or interrupt. 
PME#  OD I  PCI Power Management Event: PCI peripherals drive PME# to 
wake the system from low-power states S1–S5. PME# assertion can 
also be enabled to generate an SCI from the S0 state. In some cases 
the ICH6 may drive PME# active due to an internal wake event. The 
ICH6 will not drive PME# high, but it will be pulled up to VccSus3_3 
by an internal pull-up resistor. 
Serial ATA Interface Signals 
Name Type Description 
SATA[0]TXP 
SATA[0]TXN 
O  Serial ATA 0 Differential Transmit Pair: These are outbound 
high-speed differential signals to Port 0. 
SATA[0]RXP 
SATA[0]RXN 
I  Serial ATA 0 Differential Receive Pair: These are inbound 
high-speed differential signals from Port 0. 
SATA[1]TXP 
SATA[1]TXN 
O  Serial ATA 1 Differential Transmit Pair: These are outbound 
high-speed differential signals to Port 1. 
SATA[1]RXP 
SATA[1]RXN 
I  Serial ATA 1 Differential Receive Pair: These are inbound 
high-speed differential signals from Port 1. 
SATA[2]TXP 
SATA[2]TXN 
O  Serial ATA 2 Differential Transmit Pair: These are outbound 
high-speed differential signals to Port 2. 
SATA[2]RXP 
SATA[2]RXN 
I  Serial ATA 2 Differential Receive Pair: These are inbound 
high-speed differential signals from Port 2. 
SATA[3]TXP 
SATA[3]TXN 
O  Serial ATA 3 Differential Transmit Pair: These are outbound 
high-speed differential signals to Port 3. 
SATA[3]RXP 
SATA[3]RXN 
I  Serial ATA 3 Differential Receive Pair: These are inbound 
high-speed differential signals from Port 3. 
SATARBIAS O  Serial ATA Resistor Bias: These are analog connection points for an 
external resistor to ground. 
SATARBIAS# I  Serial ATA Resistor Bias Complement: These are analog 
connection points for an external resistor to ground. 
SATA[0]GP / 
GPI[26]  I  Serial ATA 0 General Purpose: This is an input pin which can be 
configured as an interlock switch corresponding to SATA Port 0. 
When used as an interlock switch status indication, this signal should 
be drive to ‘0’ to indicate that the switch is closed and to ‘1’ to 
indicate that the switch is open. 
If interlock switches are not required, this pin can be configured as 
GPI[26].  
NOTE: All SATAxGP pins must be configured with the same 
function: as either SATAxGP pins or GPI pins. 
SATA[1]GP / 
GPI[29]  I  Serial ATA 1 General Purpose: Same function as SATA[0]GP, 
except for SATA Port 1. 
If interlock switches are not required, this pin can be configured as 
GPI[29]. 
SATA[2]GP / 
GPI[30]  I  Serial ATA 2 General Purpose: Same function as SATA[0]GP, 
except for SATA Port 2. 
If interlock switches are not required, this pin can be configured as 
GPI[30]. 
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Serial ATA Interface Signals (Continued) 
Name Type Description 
SATA[3]GP / 
GPI[31]  I  Serial ATA 3 General Purpose: Same function as SATA[0]GP, 
except for SATA Port 3. 
If interlock switches are not required, this pin can be configured as 
GPI[31]. 
SATALED#  OC O  Serial ATA LED: This is an open-collector output pin driven during 
SATA command activity. It is to be connected to external circuitry 
that can provide the current to drive a platform LED. When active, 
the LED is on. When tri-stated, the LED is off. An external pull-up 
resistor to Vcc3_3 is required. 
NOTE: An internal pull-up is enabled only during PLTRST# 
assertion. 
LAN Connect Interface Signals 
Name Type Description 
LAN_CLK I  LAN I/F Clock: This signal is driven by the LAN Connect 
component. The frequency range is 5 MHz to 50 MHz. 
LAN_RXD[2:0]  I  Received Data: The LAN Connect component uses these signals to 
transfer data and control information to the integrated LAN 
controller. These signals have integrated weak pull-up resistors. 
LAN_TXD[2:0]  O  Transmit Data: The integrated LAN controller uses these signals to 
transfer data and control information to the LAN Connect component. 
LAN_RSTSYNC O  LAN Reset/Sync: The LAN Connect component’s Reset and Sync 
signals are multiplexed onto this pin. 
Other Clocks 
Name Type Description 
CLK14 I  Oscillator Clock: This clock is used for 8254 timers. It runs at 
14.31818 MHz. This clock is permitted to stop during S3 (or lower) 
states. 
CLK48 I  48 MHz Clock: This clock is used to run the USB controller. IT runs 
at 48.000 MHz. 
This clock is permitted to stop during S3 (or lower) states. 
SATA_CLKP 
SATA_CLKN 
I  100 MHz Differential Clock: These signals are used to run the 
SATA controller. Runs at 100 MHz. This clock is permitted to stop 
during S3 (or lower) states. 
DMI_CLKP, 
DMI_CLKN 
I  100 MHz Differential Clock: These signals are used to run the 
Direct Media Interface. Runs at 100 MHz. 
Interrupt Signals 
Name Type Description 
SERIRQ I/O  Serial Interrupt Request: This pin implements the serial interrupt 
protocol. 
PIRQ[D:A]# OD I  PCI Interrupt Requests: In non-APIC mode the PIRQx# signals can 
be routed to interrupts 3, 4, 5, 6, 7, 9, 10, 11, 12, 14 or 15 as described 
in the Interrupt Steering section. Each PIRQx# line has a separate 
Route Control register. 
In APIC mode, these signals are connected to the internal I/O APIC in 
the following fashion: PIRQA# is connected to IRQ16, PIRQB# to 
IRQ17, PIRQC# to IRQ18, and PIRQD# to IRQ19. This frees the 
legacy interrupts. 
PIRQ[H:E]# / 
GPI[5:2] 
OD I  PCI Interrupt Requests: In non-APIC mode the PIRQx# signals can 
be routed to interrupts 3, 4, 5, 6, 7, 9, 10, 11, 12, 14 or 15 as described 
in the Interrupt Steering section. Each PIRQx# line has a separate 
Route Control register. 
In APIC mode, these signals are connected to the internal I/O APIC in 
the following fashion: PIRQE# is connected to IRQ20, PIRQF# to 
IRQ21, PIRQG# to IRQ22, and PIRQH# to IRQ23. This frees the 
legacy interrupts. If not needed for interrupts, these signals can be 
used as GPI. 
IDEIRQ I  IDE Interrupt Request: This interrupt input is connected to the IDE 
drive. 
LPC Interface Signals 
Name Type Description 
LAD[3:0] / 
FWH[3:0] 
I/O  LPC Multiplexed Command, Address, Data: For LAD[3:0], 
internal pull-ups are provided. 
LFRAME# / 
FWH[4] 
O  LPC Frame: LFRAME# indicates the start of an LPC cycle, or an 
abort. 
LDRQ[0]# 
LDRQ[1]# / 
GPI[41] 
I  LPC Serial DMA/Master Request Inputs: LDRQ[1:0]# are used to 
request DMA or bus master access. These signals are typically 
connected to external Super I/O device. An internal pull-up resistor is 
provided on these signals. 
LDRQ[1]# may optionally be used as GPI. 
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IDE Interface Signals 
Name Type Description 
DCS1# O  IDE Device Chip Selects for 100 Range: For ATA command 
register block. This output signal is connected to the corresponding 
signal on the IDE connector. 
DCS3# O  IDE Device Chip Select for 300 Range: For ATA control register 
block. This output signal is connected to the corresponding signal on 
the IDE connector. 
DA[2:0] O  IDE Device Address: These output signals are connected to the 
corresponding signals on the IDE connector. They are used to indicate 
which byte in either the ATA command block or control block is 
being addressed. 
DD[15:0] I/O  IDE Device Data: These signals directly drive the corresponding 
signals on the IDE connector. There is a weak internal pull-down 
resistor on DD7. 
DDREQ I  IDE Device DMA Request: This input signal is directly driven from 
the DRQ signal on the IDE connector. It is asserted by the IDE device 
to request a data transfer, and used in conjunction with the PCI bus 
master IDE function and are not associated with any AT compatible 
DMA channel. There is a weak internal pull-down resistor on this 
signal. 
DDACK# O  IDE Device DMA Acknowledge: This signal directly drives the 
DAK# signal on the IDE connector. DDACK# is asserted by the Intel 
ICH6 to indicate to IDE DMA slave devices that a given data transfer 
cycle (assertion of DIOR# or DIOW#) is a DMA data transfer cycle. 
This signal is used in conjunction with the PCI bus master IDE 
function and are not associated with any AT-compatible DMA 
channel. 
DIOR# / (DWSTB 
/ RDMARDY#) 
O  DIOR# / 
Disk I/O Read (PIO and Non-Ultra DMA): This is the command to 
the IDE device that it may drive data onto the DD lines. Data is 
latched by the ICH6 on the de-assertion edge of DIOR#. The IDE 
device is selected either by the ATA register file 
chip selects (DCS1# or DCS3#) and the DA lines, or the IDE DMA 
acknowledge (DDAK#) 
Disk Write Strobe (Ultra DMA Writes to Disk): This is the data write 
strobe for writes to disk. When writing to disk, ICH6 drives valid data 
on rising and falling edges of DWSTB. 
Disk DMA Ready (Ultra DMA Reads from Disk): This is the DMA 
ready for reads from disk. When reading from disk, ICH6 de-asserts 
RDMARDY# to pause burst data transfers. 
IDE Interface Signals (Continued)   
Name Type Description 
DIOW# / (DSTOP) O  Disk I/O Write (PIO and Non-Ultra DMA): This is the command to 
the IDE device that it may latch data from the DD lines. Data is 
latched by the IDE device on the de-assertion edge of DIOW#. The 
IDE device is selected either by the ATA register file chip selects 
(DCS1# or DCS3#) and the DA lines, or the IDE DMA acknowledge 
(DDAK#). 
Disk Stop (Ultra DMA): ICH6 asserts this signal to terminate a burst. 
IORDY / (DRSTB 
/ WDMARDY#) 
I  I/O Channel Ready (PIO): This signal will keep the strobe active 
(DIOR# on reads, DIOW# on writes) longer than the minimum width. 
It adds wait-states to PIO transfers. 
Disk Read Strobe (Ultra DMA Reads from Disk): When reading from 
disk, ICH6 latches data on rising and falling edges of this signal from 
the disk.   
Disk DMA Ready (Ultra DMA Writes to Disk): When writing to 
disk, this is de-asserted by the disk to pause burst data transfers. 
System Management Interface Signals 
Name Type Description 
INTRUDER# I  Intruder Detect: This signal can be set to disable system if box 
detected open. 
This signal’s status is readable, so it can be used like a GPI if the 
Intruder Detection is not needed. 
SMLINK[1:0] OD I/O System Management Link: SMBus link to optional external system 
management ASIC or LAN controller. External pull-ups are required. 
Note that SMLINK0 corresponds to an SMBus Clock signal, and 
SMLINK1 corresponds to an SMBus Data signal. 
LINKALERT# OD I/O SMLink Alert: Output of the integrated LAN and input to either the 
integrated ASF or an external management controller in order for the 
LAN’s SMLINK slave to be serviced. 
SM Bus Interface Signals 
Name Type Description 
SMBDATA OD I/O SMBus Data: External pull-up resistor is required. 
SMBCLK OD I/O SMBus Clock: External pull-up resistor is required. 
SMBALERT#/ 
GPI[11] 
I  SMBus Alert: This signal is used to wake the system or generate 
SMI#. If not used for SMBALERT#, it can be used as a GPI. 
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5.2 Intel ICH6-M South Bridge(5)
USB Interface Signals 
Name Type Description 
USBP[0]P, 
USBP[0]N, 
USBP[1]P, 
USBP[1]N 
I/O  Universal Serial Bus Port [1:0] Differential: These differential pairs 
are used to transmit Data/Address/Command signals for ports 0 and 1. 
These ports can be routed to UHCI controller #1 or the EHCI 
controller. 
NOTE: No external resistors are required on these signals. The ICH6 
integrates 15 KΩ?pull-downs and provides an output driver 
impedance of 45Ωwhich requires no external series resistor 
USBP[2]P, 
USBP[2]N, 
USBP[3]P, 
USBP[3]N 
I/O  Universal Serial Bus Port [3:2] Differential: These differential pairs 
are used to transmit data/address/command signals for ports 2 and 3. 
These ports can be routed to UHCI controller #2 or the EHCI 
controller.  
NOTE: No external resistors are required on these signals. The ICH6 
integrates 15 KΩ?pull-downs and provides an output driver 
impedance of 45Ωwhich requires no external series resistor 
USBP[4]P, 
USBP[4]N, 
USBP[5]P, 
USBP[5]N 
I/O  Universal Serial Bus Port [5:4] Differential: These differential pairs 
are used to transmit Data/Address/Command signals for ports 4 and 5. 
These ports can be routed to UHCI controller #3 or the EHCI 
controller.  
NOTE: No external resistors are required on these signals. The ICH6 
integrates 15 KΩ?pull-downs and provides an output driver 
impedance of 45Ωwhich requires no external series resistor 
USBP[6]P, 
USBP[6]N, 
USBP[7]P, 
USBP[7]N 
I/O  Universal Serial Bus Port [7:6] Differential: These differential pairs 
are used to transmit Data/Address/Command signals for ports 6 and 7. 
These ports can be routed to UHCI controller #4 or the EHCI 
controller. 
NOTE: No external resistors are required on these signals. The ICH6 
integrates 15 KΩ?pull-downs and provides an output driver 
impedance of 45Ωwhich requires no external series resistor 
OC[3:0]#  
OC[4]# / GPI[9] 
OC[5]# / GPI[10] 
OC[6]# / GPI[14] 
OC[7]# / GPI[15] 
I  Overcurrent Indicators: These signals set corresponding bits in the 
USB controllers to indicate that an overcurrent condition has 
occurred. 
OC[7:4]# may optionally be used as GPIs. 
NOTE: OC[7:0]# are not 5 V tolerant. 
USBRBIAS O  USB Resistor Bias: Analog connection point for an external resistor. 
Used to set transmit currents and internal load resistors. 
USBRBIAS# I  USB Resistor Bias Complement: Analog connection point for an 
external resistor. Used to set transmit currents and internal load 
resistors. 
Miscellaneous Signals 
Name Type Description 
INTVRMEN I  Internal Voltage Regulator Enable: This signal enables the internal 
1.5 V Suspend regulator when connected to VccRTC. When 
connected to Vss, the internal regulator is disabled 
SPKR O  Speaker: The SPKR signal is the output of counter 2 and is internally 
“ANDed” with Port 61h bit 1 to provide Speaker Data Enable. This 
signal drives an external speaker driver device that in turn drives the 
system speaker. Upon PLTRST#, its output state is 0. 
NOTE: SPKR is sampled at the rising edge of PWROK as a 
functional strap. See Section 2.22.1 for more details. There is a weak 
integrated pull-down resistor on SPKR pin. 
RTCRST# I  RTC Reset: When asserted, this signal resets register bits in the RTC 
well. 
NOTES: 
1.  Unless CMOS is being cleared (only to be done in the G3 power 
state), the RTCRST# input must always be high when all other 
RTC power planes are on. 
2.  In the case where the RTC battery is dead or missing on the 
platform, the RTCRST# pin must rise before the RSMRST# pin. 
TP[0] I  Test Point 0: This signal must have an external pull-up to 
VccSus3_3. 
TP[1] O  Test Point 1: Route signal to a test point. 
TP[2] O  Test Point 2: Route signal to a test point. 
TP[3] I  Test Point 3: Route signal to a test point. 
TP[4] O  Test Point 4: Route signal to a test point. 
EEPROM Interface Signals 
Name Type Description 
EE_SHCLK O  EEPROM Shift Clock: This signal is the serial shift clock output to 
the EEPROM. 
EE_DIN I  EEPROM Data In: This signal transfers data from the EEPROM to 
the Intel ® ICH6. This signal has an integrated pull-up resistor. 
EE_DOUT O  EEPROM Data Out: This signal transfers data from the ICH6 to the 
EEPROM. 
EE_CS O  EEPROM Chip Select: This is the chip select signal to the 
EEPROM. 
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5.2 Intel ICH6-M South Bridge(6)
Power Management Interface Signals   
Name Type Description 
PWRBTN# I  Power Button: The Power Button will cause SMI# or SCI to indicate 
a system request to go to a sleep state. If the system is already in a 
sleep state, this signal will cause a wake event. If PWRBTN# is 
pressed for more than 4 seconds, this will cause an unconditional 
transition (power button override) to the S5 state. Override will occur 
even if the system is in the S1-S4 states. This signal has an internal 
pull-up resistor and has an internal 16 ms de-bounce on the input. 
RI# I  Ring Indicate: This signal is an input from a modem. It can be 
enabled as a wake event, and this is preserved across power failures. 
SYS_RESET# I  System Reset: This pin forces an internal reset after being debounced. 
The ICH6 will reset immediately if the SMBus is idle; otherwise, it 
will wait up to 25 ms ± 2 ms for the SMBus to idle before forcing a 
reset on the system. 
RSMRST# I  Resume Well Reset: This signal is used for resetting the resume 
power plane logic. 
LAN_RST#  I  LAN Reset: When asserted, the internal LAN controller will be put 
into reset. This signal must be asserted for at least 10 ms after the 
resume well power (VccSus3_3 and VccSus1_5) is valid. When 
de-asserted, this signal is an indication that the resume well power is 
stable.  
NOTE: LAN_RST# must de-assert at some point to complete ICH6 
power up sequencing. 
WAKE#  I  PCI Express* Wake Event: Sideband wake signal on PCI Express 
asserted by components requesting wakeup. 
MCH_SYNC#  I  MCH SYNC: This input is internally ANDed with the PWROK 
input. 
Connected to the ICH_SYNC# output of (G)MCH. 
SUS_STAT# / 
LPCPD# O  Suspend Status: This signal is asserted by the ICH6 to indicate that 
the system will be entering a low power state soon. This can be 
monitored by devices with memory that need to switch from normal 
refresh to suspend refresh mode. It can also be used by other 
peripherals as an indication that they should isolate their outputs that 
may be going to powered-off planes. This signal is called LPCPD# on
the LPC I/F. 
SUSCLK  O  Suspend Clock: This clock is an output of the RTC generator circuit 
to use by other chips for refresh clock. 
VRMPWRGD  I  VRM Power Good: This should be connected to be the processor’s 
VRM Power Good signifying the VRM is stable. This signal is 
internally ANDed with the PWROK input. 
Power Management Interface Signals (Continued) 
Name Type Description 
PLTRST# O  Platform Reset: The ICH6 asserts PLTRST# to reset devices on the 
platform (e.g., SIO, FWH, LAN, (G)MCH, IDE, TPM, etc.). The 
ICH6 asserts PLTRST# during power-up and when S/W initiates a 
hard reset sequence through the Reset Control register (I/O Register 
CF9h). The ICH6 drives PLTRST# inactive a minimum of 1 ms after 
both PWROK and VRMPWRGD are driven high. The ICH6 drives 
PLTRST# active a minimum of 1 ms when initiated through the Reset 
Control register (I/O Register CF9h). 
NOTE: PLTRST# is in the VccSus3_3 well. 
THRM# I  Thermal Alarm: This is an active low signal generated by external 
hardware to generate an SMI# or SCI. 
THRMTRIP# I  Thermal Trip: When low, this signal indicates that a thermal trip 
from the processor occurred, and the ICH6 will immediately 
transition to a S5 state. The ICH6 will not wait for the processor stop 
grant cycle since the processor has overheated. 
SLP_S3# O  S3 Sleep Control: SLP_S3# is for power plane control. This signal 
shuts off power to all non-critical systems when in S3 (Suspend To 
RAM), S4 (Suspend to Disk), or S5 (Soft Off) states. 
SLP_S4# O  S4 Sleep Control: SLP_S4# is for power plane control. This signal 
shuts power to all non-critical systems when in the S4 (Suspend to 
Disk) or S5 (Soft Off) state.   
NOTE: This pin must be used to control the DRAM power in order 
to use the ICH6’s DRAM power-cycling feature. Refer to Chapter 
5.14.10.2 for details. 
SLP_S5# O  S5 Sleep Control: SLP_S5# is for 
p
ower plane control. This signal is 
used to shut power off to all non-critical systems when in the S5 (Soft 
Off) states. 
PWROK I  Power OK: When asserted, PWROK is an indication to the ICH6 
that core power has been stable for at least 99 ms and PCICLK has 
been stable for at least 1 mS. An exception to this rule is if the system 
is in S3 HOT , in which PWROK may or may notstay asserted even 
though PCICLK may be inactive. PWROK can be driven 
asynchronously. When PWROK is negated, the ICH6 asserts 
PLTRST#. 
NOTE: PWROK must de-assert for a minimum of three RTC clock 
periods in order for the ICH6 to fully reset the power and properly 
generate the PLTRST# output 
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5.2 Intel ICH6-M South Bridge(7)
Processor Interface Signals 
Name Type Description 
A20M# O  Mask A20: A20M# will go active based on either setting the 
appropriate bit in the Port 92h register, or based on the A20GATE 
input being active. 
CPUSLP# O  Processor Sleep: This signal puts the processor into a state that saves 
substantial power compared to Stop-Grant state. However, during that 
time, no snoops occur. 
The Intel® ICH6 can optionally assert the CPUSLP# signal when 
going to the S1 state, and will always assert it when going to C3 or 
C4. 
FERR# I  Numeric Coprocessor Error: This signal is tied to the coprocessor 
error signal on the processor. FERR# is only used if the ICH6 
coprocessor error reporting function is enabled in the OIC.CEN 
register (Chipset ConfigurationRegisters:Offset 31FFh: bit 1). If 
FERR# is asserted, the ICH6 generates an internal IRQ13 to its 
interrupt controller unit. It is also used to gate the IGNNE# signal to 
ensure that IGNNE# is not asserted to the processor unless FERR# is 
active. FERR# requires an external weak pull-up to ensure a high 
level when the coprocessor error function is disabled. 
NOTE: FERR# can be used in some states for notification by the 
processor of pending interrupt events. This functionality is 
independent of the OIC register bit setting. 
IGNNE# O  Ignore Numeric Error: This signal is connected to the ignore error 
pin on the processor. IGNNE# is only used if the ICH6 coprocessor 
error reporting function is enabled in the OIC.CEN register (Chipset 
Configuration Registers:Offset 31FFh: bit 1). If FERR# is active, 
indicating a coprocessor error, a write to the Coprocessor Error 
register (I/O register F0h) causes the IGNNE# to be asserted. 
IGNNE# remains asserted until FERR# is negated. If FERR# is not 
asserted when the Coprocessor Error register is written, the IGNNE# 
signal is not asserted. 
INIT# O  Initialization: INIT# is asserted by the ICH6 for 16 PCI clocks to 
reset the processor. 
ICH6 can be configured to support processor Built In Self Test 
(BIST). 
INIT3_3V# O  Initialization 3.3 V: This is the identical 3.3 V copy of INIT# 
intended for Firmware Hub. 
INTR O  Processor Interrupt: INTR is asserted by the ICH6 to signal the 
processor that an interrupt request is pending and needs to be 
serviced. It is an asynchronous output and normally driven low. 
Processor Interface Signals (Continued) 
Name Type Description 
NMI O  Non-Maskable Interrupt: NMI is used to force a non-Maskable 
interrupt to the processor. The ICH6 can generate an NMI when 
either SERR# is asserted or IOCHK# goes active via the SERIRQ# 
stream. The processor detects an NMI when it detects a rising edge on 
NMI. NMI is reset by setting the corresponding NMI source 
enable/disable bit in the NMI Status and Control register (I/O 
Register 61h). 
SMI# O  System Management Interrupt: SMI# is an active low output 
synchronous to PCICLK. It is asserted by the ICH6 in response to one 
of many enabled hardware or software events. 
STPCLK# O  Stop Clock Request: STPCLK# is an active low output synchronous 
to PCICLK. It is asserted by the ICH6 in response to one of many 
hardware or software events. 
When the processor samples STPCLK# asserted, it responds by 
stopping its internal clock. 
RCIN# I  Keyboard Controller Reset CPU: The keyboard controller can 
generate INIT# to the processor. This saves the external OR gate with 
the ICH6’s other sources of INIT#. When the ICH6 detects the 
assertion of this signal, INIT# is generated for 16 PCI clocks. 
NOTE: The ICH6 will ignore RCIN# assertion during transitions to 
the S1, S3, S4, and S5 states. 
A20GATE I  A20 Gate: A20GATE is from the keyboard controller. The signal 
acts as an alternative method to force the A20M# signal active. It 
saves the external OR gate needed with various other chipsets. 
CPUPWRGD / 
GPO[49] 
OD 
O  Processor Power Good: This signal should be connected to the 
processor’s PWRGOOD input to indicate when the processor power 
is valid. This is an open- drain output signal (external pull-up resistor 
required) that represents a logical AND of the ICH6’s PWROK and 
VRMPWRGD signals. 
This signal may optionally be configured as a GPO. 
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5.2 Intel ICH6-M South Bridge(8)
General Purpose I/O Signals 1,2 
Name Type Tolerance Power Well Description 
GPO[49] OD O  V_CPU_I
O
`Core  This signal is fixed as output only and can 
instead be used as CPUPWRGD. 
GPO[48] O  3.3 V  Core  This signal is fixed as output only and can 
instead be used as GNT4#. 
GPIO[47:42] N/A  N/A  N/A  This signal is not implemented. 
GPI[41] I  3.3 V  Core  This signal is fixed as input only and can be used
instead as LDRQ1#. 
GPI[40] I  5 V  Core  This signal is fixed as input only and can be used
instead as REQ4#. 
GPIO[39:35] N/A  N/A  N/A  This signal is not implemented. 
GPIO[34:33] I/O  3.3 V  Core  This signal can be input or output and is 
unmultiplexed 
GPIO[32] I/O  3.3 V  Core  This signal can be input or output. 
GPI[31] I  3.3 V  Core  This signal is fixed as input only and can instead 
be used for SATA[3]GP. 
GPI[30] I  3.3 V  Core  This signal is fixed as input only and can instead 
be used for SATA[2]GP. 
GPI[29] I  3.3 V  Core  This signal is fixed as input only and can instead 
be used for SATA[1]GP. 
GPIO[28:27] I/O  3.3 V  Resume  This signal can be input or output and is 
unmultiplexed. 
GPI[26] I  3.3 V  Core  This signal is fixed as input only and can instead 
be used for SATA[0]GP. 
GPIO[25] I/O  3.3 V  Resume  This signal can be input or output and is 
unmultiplexed. It is a strap for internal Vcc2_5 
regulator. See Section 2.22.1. 
GPIO[24] I/O  3.3 V  Resume  This signal can be input or output and is 
unmultiplexed. 
GPO[23] O  3.3 V  Core  This signal is fixed as output only. 
GPIO[22] N/A  N/A  N/A  This signal is not Implemented 
GPO[21] O  3.3 V  Core  This signal is fixed as output only and is 
unmultiplexed 
GPO[20] O  3.3 V  Core  This signal is fixed as output only. 
GPO[19] O  3.3 V  Core  This signal is fixed as output only. 
NOTE: GPO[19] may be programmed to blink 
(controllable by GPO_BLINK (D31:F0:Offset 
GPIOBASE+18h:bit 19)). 
General Purpose I/O Signals 1,2 (Continued) 
Name Type Tolerance Power Well Description 
GPO[18]  O  3.3 V  Core  This signal is fixed as output only. 
NOTE: GPO[18] will blink by default 
immediately after reset (controllable by 
GPO_BLINK (D31:F0:Offset 
GPIOBASE+18h:bit 18)). 
GPO[17]  O  3.3 V  Core  This signal is fixed as output only and can be 
used instead as PCI GNT[5]#. 
GPO[16]  O  3.3 V  Core  This signal is fixed as output only and can be 
used instead as PCI GNT[6]#. 
GPI[15:14]3  I  3.3 V  Resume  This signal is fixed as input only and can be used 
instead as OC[7:6]# 
GPI[13]3  I  3.3 V  Resume  This signal is fixed as input only and is 
unmultiplexed. 
GPI[12]3  I  3.3 V  Core  This signal is fixed as input only and is 
unmultiplexed. 
GPI[11]3  I  3.3 V  Resume  This signal is fixed as input only and can be used 
instead as SMBALERT#. 
GPI[10:9]3  I  3.3 V  Resume  This signal is fixed as input only and can be used 
instead as OC[5:4]#. 
GPI[8]3  I  3.3 V  Resume  This signal is fixed as input only and is 
unmultiplexed. 
GPI[7]3  I  3.3 V  Core  This signal is fixed as input only and is 
unmultiplexed. 
GPI[6]3  I  3.3 V  Core  This signal is fixed as input only. 
GPI[5:2]3  I  5 V  Core  This signal is fixed as input only and can be used 
instead as PIRQ[H:E]#. 
GPI[1:0]3  I  5 V  Core  This signal is fixed as input only and can be used 
instead as PCI REQ[6:5]#. 
NOTES: 
1.All inputs are sticky. The status bit remains set as long as the input was asserted for two   
clocks.GPIs are sampled on PCI clocks in S0/S1. GPIs are sampled on RTC clocks in S3/S4/S5. 
2.Some GPIOs exist in the VccSus3_3 power plane. Care must be taken to make sure GPIO   
signals are not driven high into powered-down planes. Some ICH6 GPIOs may be connected to   
pins on devices that exist in the core well. If these GPIOs are outputs, there is a danger that a 
loss of core power (PWROK low) or a Power Button Override event will result in the Intel   
ICH6 driving a pin to a logic 1 to another device that is powered down. 
3.GPI[15:0] can be configured to cause a SMI# or SCI. Note that a GPI can be routed to either   
an SMI# or an SCI, but not both. 
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5.2 Intel ICH6-M South Bridge(9)
Power and Ground Signals 
Name Description 
Vcc3_3  3.3 V supply for core well I/O buffers (22 pins). This power may be shut off in S3, 
S4, S5 or G3 states. 
Vcc1_5_A  1.5 V supply for core well logic, group A (52 pins). This power may be shut off in 
S3, S4, S5 or G3 states. 
Vcc1_5_B  1.5 V supply for core well logic, group B (45 pins). This power may be shut off in 
S3, S4, S5 or G3 states. 
Vcc2_5  2.5V supply for internal logic (2 pins). This power may be shut off in S3, S4, S5 or 
G3 states. 
NOTE: This voltage may be generated internally (see Section 2.22.1 for strapping 
option). If generated internally, these pins should not be connected to an external 
supply. 
V5REF  Reference for 5 V tolerance on core well inputs (2 pins). This power may be shut 
off in S3, S4, S5 or G3 states. 
VccSus3_3  3.3 V supply for resume well I/O buffers (20 pins). This power is not expected to 
be shut off unless the system is unplugged. 
VccSus1_5  1.5 V supply for resume well logic (3 pin). This power is not expected to be shut 
off unless the system is unplugged.   
This voltage may be generated internally (see Section 2.22.1 for strapping option). 
If generated internally, these pins should not be connected to an external supply. 
V5REF_Sus  Reference for 5 V tolerance on resume well inputs (1 pin). This power is not 
expected to be shut off unless the system is unplugged. 
VccRTC  3.3 V (can drop to 2.0 V min. in G3 state) supply for the RTC well (1 pin). This 
power is not expected to be shut off unless the RTC battery is removed or 
completely drained. 
NOTE: Implementations should not attempt to clear CMOS by using a jumper to 
pull VccRTC low. Clearing CMOS in an ICH6-based platform can be done by 
using a jumper on RTCRST# or GPI. 
VccUSBPLL  1.5 V supply for core well logic (1 pin). This signal is used for the USB PLL. This 
power may be shut off in S3, S4, S5 or G3 states. This signal must be powered 
even if USB not used. 
VccDMIPLL  1.5 V supply for core well logic (1 pins). This signal is used for the DMI PLL. This 
power may be shut off in S3, S4, S5 or G3 states. 
VccSATAPLL  1.5 V supply for core well logic (1 pins). This signal is used for the SATA PLL. 
This power may be shut off in S3, S4, S5 or G3 states. This signal must be 
powered even if SATA not used. 
V_CPU_IO  Powered by the same supply as the processor I/O voltage (3 pins). This supply is 
used to drive the processor interface signals listed in Table 2-13. 
Vss  Grounds (172 pins). 
AC ’97/Intel ® High Definition Audio Link Signals 
NOTES: 
1.  Some signals have integrated pull-ups or pull-downs. Consult table in Section 3.1 for   
details. 
2.  Intel High Definition Audio mode is selected through D30:F1:40h, bit 0: AZ/AC97#. This 
bit selects the mode of the shared Intel High Definition Audio/AC ‘97 signals. When set to 0   
AC ’97 mode is selected. When set to 1 Intel High Definition Audio mode is selected. The bit   
defaults to 0 (AC ‘97 mode). 
Name Type Description 
ACZ_RST# O  AC ’97/Intel ® High Definition Audio Reset: Master hardware reset 
to external codec(s). 
ACZ_SYNC O  AC ’97/Intel High Definition Audio Sync: 48 kHz fixed rate sample 
sync to the codec(s). Also used to encode the stream number. 
ACZ_BIT_CLK I/O  AC ’97 Bit Clock Input: 12.288 MHz serial data clock generated by 
the external codec(s). This signal has an integrated pull-down resistor 
(see Note below). 
Intel High Definition Audio Bit Clock Output: 24.000 MHz serial 
data clock generated by the Intel® High Definition Audio controller 
(the Intel ICH6). Thissignal has an integrated pull-down resistor so 
that ACZ_BIT_CLK does not float when an 
Intel High Definition Audio codec (or no codec) is connected but the 
signals are temporarily configured as AC ’97. 
ACZ_SDOUT O  AC ’97/Intel High Definition Audio Serial Data Out: Serial TDM 
data output to the codec(s). This serial output is double-pumped for a 
bit rate of 48 Mb/s for Intel High Definition Audio. 
NOTE: ACZ_SDOUT is sampled at the rising edge of PWROK as a 
functional strap. See Section 2.22.1 for more details. There is a weak 
integrated pull-down resistor on the ACZ_SDOUT pin. 
ACZ_SDIN[2:0] I  AC ’97/Intel High Definition Audio Serial Data In [2:0]: Serial 
TDM data inputs from the three codecs. The serial input is 
single-pumped for a bit rate of 24 Mb/s for Intel High Definition 
Audio. These signals have integrated pull-down resistors, which are 
always enabled. 
Firmware Hub Interface Signals 
Name Type Description 
FWH[3:0] / 
LAD[3:0] 
I/O  Firmware Hub Signals. These signals are multiplexed with the LPC 
address signals. 
FWH[4] / 
LFRAME# 
O  Firmware Hub Signals. This signal is multiplexed with the LPC 
LFRAME# signal. 
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5.2 Intel ICH6-M South Bridge(10)
Functional Strap Definitions 1 
Signal Usage When Sampled Description 
GNT[6]#/ 
GPO[16] 
Top-Block Swa
p
Override 
Rising Edge of 
PWROK 
The signal has a weak internal pull-up. If the 
signal is sampled low, this indicates that the 
system is strapped to the “top-block swap” mode 
(ICH6 inverts A16 for all cycles targeting FWH 
BIOS space). The status of this strap is readable 
via the Top Swap bit (Chipset Configuration 
Registers:Offset 3414h:bit 0). Note that software 
will not be able to clear the Top-Swap bit until 
the system is rebooted without GNT6# being 
pulled down. 
LINKALERT
# 
Reserved    This signal requires an external pull-up resistor.
SPKR  No Reboot  Rising Edge 
ofPWROK 
The signal has a weak internal pull-down. If the 
signal is.sampled high, this indicates that the 
system is strapped to.the “No Reboot” mode 
(ICH6 will disable the TCO Timer. system 
reboot feature). The status of this strap is 
readable. via the NO REBOOT bit (Chipset 
Configuration. Registers:Offset 3410h:bit 5). 
INTVRMEN IntegratedVccS
u
1_5VRM 
Enable/Disabl
e
Always  This signal enables integrated VccSus1_5 VRM 
when.sampled high. 
GPIO[25] Integrated 
Vcc2_5 VRM 
Enable/ Disabl
e
Rising Edge of 
RSMRST# 
This signal enables integrated Vcc2_5 VRM 
when sampled low. This signal has a weak 
internal pull-up during RSMRST# and is 
disabled within 100 ms after RSMRST# 
de-asserts. 
EE_CS  Reserved    This signal has a weak internal pull-down. 
NOTE: This signal should not be pulled high. 
GNT[5]#/ 
GPO[17] 
Boot BIOS 
Destination 
Selection 
Rising Edge of 
PWROK 
This signal has a weak internal pull-up. Allows 
for select memory ranges to be forwarded out the 
PCI Interface as opposed to the Firmware Hub. 
When sampled high, destination is LPC. Also 
controllable via Boot BIOS Destination bit 
(Chipset Configuration Registers:Offset 
3410h:bit 3). 
NOTE: This functionality intended for 
debug/testing only. 
Functional Strap Definitions 1 (Continued) 
Signal Usage When Sampled Description 
EE_DOUT    Reserved    This signal has a weak internal pull-up.   
NOTE: This signal should not be pulled low. 
ACZ_SDOU
T 
XOR Chain 
Entrance / PCI 
Express* Port 
Configu-ratio
n
bit 1 
Rising Edge of 
PWROK 
Allows entrance to XOR Chain testing when 
TP[3] pulled low at rising edge of PWROK. See 
Chapter 24 for XOR Chain functionality 
information.  
When TP[3] not pulled low at rising edge of 
PWROK, sets bit 1 of RPC.PC (Chipset 
Configuration Registers:Offset 224h). See 
Section 7.1.30 for details. 
This signal has a weak internal pull-down. 
ACZ_SYNC  PCI Express Po
r
Configu-ratio
n
bit 0 
Rising Edge of 
PWROK 
This signal has a weak internal pull-down.   
Sets bit 0 of RPC.PC (Chipset Configuration 
Registers: Off set 224h). See Section 7.1.30 for 
details. 
TP[1]  Reserved    This signal has a weak internal pull-down.   
NOTE: This signal should not be pulled high. 
SATALED#  Reserved    This signal has a weak internal pull-up enabled 
only when PLTRST# is asserted. 
NOTE: This signal should not be pulled low. 
REQ[4:1]# XOR Chain 
Selection 
Rising Edge of 
PWROK 
See Chapter 24 for functionality information. 
TP[3] XOR Chain 
Entrance 
Rising Edge of 
PWROK 
See Chapter 24 for functionality information. 
This signal has a weak internal pull-up. 
NOTE: This signal should not be pulled low 
unless using XOR Chain testing. 
Real Time Clock Interface 
Name Type Description 
RTCX1 Special Crystal Input 1: This signal is connected to the 32.768 kHz crystal. 
If no external crystal is used, then RTCX1 can be driven with the 
desired clock rate. 
RTCX2 Special Crystal Input 2: This signal is connected to the 32.768 kHz crystal. 
If no external crystal is used, then RTCX2 should be left floating. 
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6. System Block Diagram
DVI Connector
RGB Signal
Flat Panel
LVDS Signal
200 Pins DDR2 SO-DIMM Socket * 2
USB * 4
FSB
U711
Intel CPU
Dothan
U710
North Bridge 
915PM
U715
Card Bus
CB712
U509
Power Switch
CP2211A
U19
Amplifier
TPA0212
J507
M.D.C RJ-11 Jack 
U517
Audio Codec
ALC655
Mic-in Connector
Internal Speaker
Headphone
CD-ROM
U724
SATA Bridge
U709
South Bridge
ICH6-M
U717
LAN Controller
RTL8110SBL
RJ-45 Jack
DMI
PCMCIA
Slot
U722
IEEE1394
VT6301T
PCI Bus
FAN
Power Button
Keyboard
Touch Pad
U13
Keyboard BIOS
Winbond
W83L950D
LPC BUS 
IDE
U7
Clock Generator
ICS954226
U14
System BIOS
MINI PCI Slot
PCI-E_LAN
FWH BUS  U505
ADT7460
SMBUS
THRMDA/THRMDC
TV Connector
TV Signal
PATA HDD
MXM_Connector
U18
SUBWOOFER AMP Subwoofer Jack
J719
1394 port
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7. Maintenance Diagnostics
7.1 Introduction
Each time the computer is turned on, the system BIOS runs a series of internal checks on the hardware. This power-
on self test (post) allows the computer to detect problems as early as the power-on stage. Error messages of post can 
alert you to the problems of your computer.
If an error is detected during these tests, you will see an error message displayed on the screen. If the error occurs 
before the display is initialized, then the screen cannot display the error message. Error codes or system beeps are 
used to identify a post error that occurs when the screen is not available.
The value for the diagnostic port  is written at the beginning of the test. Therefore, if the test failed, the user can 
determine where the problem occurred by reading the last value written to the port-80H by the debug card plug at 
MINI PCI slot.
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7.2 Maintenance Diagnostics
7.2.1 Diagnostic Tool for Mini PCI Slot :
P/N:411906900001
Description: PWA; PWA-MPDOG/MINI PCI DOGKILLER CARD
Note: Order it from MIC/TSSC
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7.3 Error Codes-1
Following is a list of error codes in sequent display on the MINI PCI debug board.  
Test 8237A Page Registers1Fh
Initialize Monochrome Adapter1Eh
Initialize Color Adapter1Dh
Initialize Video (6845Regs)1Ch
Initialize Video Adapter(s)1Bh
Reset PIC’s1Ah
Check sum the ROM19h
Dispatch to RAM Test18h
Size Memory17h
User Register Config through CMOS16h
Reset Counter / Timer 115h
Search for ISA Bus VGA Adapter14h
Initialize the Chipset13h
Signal Power On Reset12h
Turn off FAST A20 for Post11h
Some Type of Lone Reset10h
POST Routine DescriptionCode
Sign on Messages Displayed2Fh
Search for Color Adapter2Eh
Search for Monochrome Adapter2Dh
Going to Initialize Video2Ch
Setup Shadow2Bh
Protected Mode Exit Successful2Ah
RAM Test Completed29h
Protected Mode Entered Safely28h
RAM Quick Sizing27h
Initialize Int Vectors26h
Initialize 8237A Controller25h
Test the DMA Controller24h
Test Battery Fail & CMOS X-SUM23h
Check if CMOS RAM valid22h
Test Keyboard Controller21h
Test Keyboard20h
POST Routine DescriptionCode
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7.3 Error Codes-2
Following is a list of error codes in sequent display on the MINI PCI debug board.  
Special Init of COMM and LPT Ports3Fh
Update NUMLOCK status3Eh
Search and Init the Mouse3Dh
Initialize the Hardware Vectors3Ch
Test for RTC ticking3Bh
Test if 18.2Hz Periodic Working3Ah
Setup Cache Controller39h
Update Output Port38h
Protected Mode Exit Successful37h
RAM Test Complete36h
Protected Mode Entered Safely(2)35h
Test, Blank and Count all RAM34h
Test Keyboard Command Byte33h
Test Keyboard Interrupt32h
Test if Keyboard Present31h
Special Init of Keyboard Controller30h
POST Routine DescriptionCode
Jump into Bootstrap Code49h
Dispatch to Operate System Boot48h
OEM functions before Boot47h
Test for Coprocessor Installed46h
Update NUMLOCK Status45h
OEM’s Init of Power Management44h
Initialize Option ROMs43h
Initialize the Hard Disk42h
Initialize the Floppies41h
Configure the COMM and LPT ports40h
POST Routine DescriptionCode
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8. Trouble Shooting
8.1  No Power(*1)
8.2  No Display(*2)
8.3  VGA Controller Test Error LCD No Display
8.4  External Monitor No Display
8.5  Memory Test Error
8.6  Keyboard (K/B) Touch-Pad (T/P) Test Error
8.7  Hard Drive Test Error
8.8  CD-ROM Drive Test Error
8.9  USB Port Test Error 
8.10  Audio Test Error
8.11  LAN Test Error
8.12  PC Card Socket Test Error
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*1: No Power Definition
Base on ACPI Spec. We define the no power as while we press the power button, the system can’t leave S5 status
or none the PG signal send out from power supply.  
*2: No Display Definition 
Base on the digital IC three basic working conditions: working power, reset, Clock. We define the no display as 
while system leave S5 status but can’t get into S0 status.
Judge condition:
Check whether there are any voltage feedback control to turn off the power.
Check whether no CPU power will cause system can’t leave S5 status.
If there are not any diagram match these condition, we should stop analyzing the schematic in power supply sending
out the PG signal. If yes, we should add the effected analysis into no power chapter.     
Judge condition:
Check which power will cause no display.
Check which reset signal will cause no display.
Check which Clock signal will cause no display
Base on these three conditions to analyze the schematic and edit the no display chapter. 
S5: Soft Off
S0: Working
Keyword:
For detail please refer the ACPI specification
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When the power button is pressed, nothing happens, no fan activity is heard and power indicator is not light up.
AC
Power
Battery
BATT
BAT_T
BAT_V
BAT_CLK
BAT_DATA
PU3
PL507
PF501
PQ506
PD505
PL508
PD507
PQ503
Where from
power source problem 
(first  use AC to 
power it)? 
Check following parts and signals:
Check following parts and signals:
Parts:                     Signals:
No
Board-level
Troubleshooting
Replace
Motherboard
No Power
Try another known good
battery or AC adapter.
Is the
notebook connected
to power (either AC adaptor
or battery)?
Connect AC adaptor
or battery.
No
Replace the faulty AC
adaptor or battery.
Power
OK?
Yes
Yes
8.1 No Power-1
Parts
PJ701
PL1
PF1
PQ501
PD502
U513
U515
Signals
ADINP
LEARNING
H8_I_LIMIT
SW_VDD3
Parts
Q37
Q50
U11
Signals
+PWR_VDDIN
+DVMAIN
ADINP
LEARNING
I_LIMIT
Main Board
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When the power button is pressed, nothing happens, no fan activity is heard and power indicator is not light up.
Main Voltage Map
+DVMAINADINPPOWER IN
PWR_VDDIN
PJ701
PF1 PL1
PL2
PD505
Discharge
PD502
PD503
BATT
PF501,PL506,PQ503
PU3,PL507,PL508,PD507
PQ506
Charge
Discharge
F4,U513
PQ501
P32
P28P32
P31
P32
8.1 No Power-2
J703
P32
+VDD5
Q50
+3V
+VDD3
U515 +VDD1.5+VDD3S
Q49 U11
+VDD3_RTC
D34,
P26
P26
P26 P26 P26
P11
+VDD3_AVREF
P26 Q37
PF502,PL512
PL506,PU5
PU503,PU504
PU506,PU511
PU512 +CPU_CORE
P30
+KBC_CPUCORE
R711 P23
PU502,PL503
PR508 +3VS_P
P27
PU2
+3V
P25
JS505~
JS507 +3VS
U504,L509
L501 P26
+3VS_HDD_ANALOG
L564 P14
L562 P14
+1.8VS_HDD
+3VS_HDD
P14
+1394_AVCC
P19
+3VS_CLK
P9
+1.8VS
P26
+3VS_TVDAC[A,B,C]
P6
+3VS_ATVBG
P6
L563
L531
L31
L32
U9
L40,L33
L41
L42
PU501,PL502
PR527 +5VS_P +5V
JS501~
JS504 P25P27
+5VS
L503,U502
L504 P26
L49 +5VS_CDROM
P14
AMPVDD
L73 P22
+5VS_HDD
L64 P14
+2.5V
P26
U8
+AVDDL
P15
L531
+2.5VS_CRTDAC
L39 P6
+2.5VS_ALVDS
+2.5VS_TXLVDS
L37
+2.5VS_HV
P6
P6
P6
L44
L35
+2.5VS
P26
Q12
+DVDD
P15
L533
PR42
PU12
PU509,PU510
PL516 +1.8V_P +1.8V
JS6,
JS515 P25P29
+DDR2_VREF
R606
R242 P8
+0.9VS_P +0.9VS
JS517~
JS518 P25P29
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When the power button is pressed, nothing happens, no fan activity is heard and power indicator is not light up.
Main Voltage Map
8.1 No Power-3
PL514,PL515
PU6
PU507,PL514 +1.05VS_P +VCCP
JS508~
JS510 P25P28
+VCC_GMCH
L50 P6
+1.5VS_P +1.5VS
JS511~
JS513
P28
+1.5VS_DPLLA
P6
L34
+DVMAIN
P28
PU508,PL515
+1.5VS_DPLLB
P6
L46
+1.5VS_HPLL
P6
L519
+1.5VS_MPLL
P6
L518
+1.5VS_3GPLL
P6
L51
+1.5VS_QTVDAC
P6
L43
+1.5VS_DLVDS
P6
L38
+1.5VS_DDRDLL
P6
L63
+1.5VS_PCIE
P6
L516
+1.5VS_TVDAC
P6
L36
P25
:  Page 25 on M/B Board circuit diagram. 
NOTE :
P25
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When the power button is pressed, nothing happens, no fan activity is heard and power indicator is not light up.
8.1 No Power-4
+DVMAIN
ADINP
PC532
1000P
PC528
0.01µ
S
D
2
3
1
6
7
8
5
G
PR503
100K
PR502
470K
PQ501
AQ4407
LEARNING
PR505
1M
23
+PWR_VDDIN
PD504
SBM1040
AK
PQ502
2N7002
U13
Keyboard 
BIOS 
W83L950D
P23
SW_VDD3 17
PJ701
POWER IN
PL2
120Z/100M
PC2
0.01U
PL1
120Z/100M
1
2~4
PD501
RLZ24D
PC501
1U
PF1
7A/24VDC
P31
JO2,JO1
SPARKGAP_6
PR1
10
4
5
6
RS+
OUT
RS-
PU1
PC3
1U
PC1
0.01U
3
VCC
1
GND0
2
GND1
MAX4173FEUT-T
JO502
OPEN-SMT4
PR501
.01
P31
H8_I_LIMIT 76
I_LIMIT
PC502
0.01U
PR506
4.7K
PC520
0.01µ
PD502
SCS140P
AK
LEARNING
+3V
+VDD3
C389
4.7µ
DS
G
+PWR_VDDIN 
+VDD3
+3V
+VDD3
Q50
AO3413
Q47
DDTC144WCA
SW_VDD3
C327
0.1µ
R397
100K
DS
G
Q37
AO3413
U513
NTC78L05
F4
3216FF-1
+PWR_VDDIN 3IN OUT 1
P26
2
C767
1µ
C324
10µ
+VDD5
R340
0
U515
AMS3107
INPUT OUTPUT 3
P26
2,4 C689
10µ
+VDD3_AVREF
1
PD505
SCS140P
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When the power button is pressed, nothing happens, no fan activity is heard and power indicator is not light up.
Charge
ADINP
PD507
SSA34
P32
PL508
33µH
PQ8
2N7002
G
S
D
PQ7
DTA144WK
PC29
0.01µ VCC
OUTPUTCTRL
REF 2IN- DTC 4
FEEDBACK
PR32
100K
3
1IN-
2IN+ 16
2
PU3
PWM
TL594C
C1,C2
PD4
BAS32L
PR45
4.7K
PR46
4.7K
PQ11
MMBT2222A
8,11
PR59
100K
PD506
SSA34
4
G
S
D
2
3
1
6
7
8
5
PQ503
AO4407
CHARGING
From H8 U13
2IN+
12
13
14
5
6
CT
RT
PR34
7.5K
PC21
1000P
PC22
0.01µ
PC30
1µ
PC23
0.1µ
P32
PR35
10K
PC25
0.1µ
15
REF
PR25
124K
PJS1
SHORT-SMT3
P23
GND GNDB
PR11
.02
GND
H8_I_CTRL
From U13
P23
PR36
590K
PR37
100K
1.25V
6
PR33
80.6K
PC24
0.1µ
+
_
+VDD3
5
PU4B
LMV393M
7
84
+DVMAIN
PR38
1K
PQ6
SCK431CSK-5
+VDD3
PC33
0.01µ BATT_DEAD#
To H8 U13
P23
8.1 No Power-5
PF501
TR/3216FF-3A
PL506
BEAD_120Z/100M
PC525
0.01µ
PC524
0.01µ
PC533
10µ
BATT
PD509
BZV55C15V
PC534
10µ
Q43
DDTC144TCA
PR47
0
PL507
3.0µH
PC535
10µ
PC536
0.01µ
PR28
287K
PQ5
2N7002
CHARGING
From H8 U510 P23
PR27
20K
PC17
0.1µ
PR24
13.7K
PR136
976K
PR135
2M
PJOL1
OPEN-SMT4
PJOH1
OPEN-SMT4
2IN+
12.65V
PR26
0
PR12
2.49K
BATT_DEAD
PC18
0.01µ
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+VDD3_AVREF
1
2
3
C332
0.1µ
C333
0.1µ
D16
BAV70LT1
77
78
PC19
0.1µ
PR29
100K
PR510
499K
PL505
120Z/100M
PF701
TR/SFT-10A
PL504
120Z/100M
PC514
0.01µ
1,2
5
PC523
0.01µ
+VDD3_AVREF
PR134
4.99K
PR8
20K
PC10
0.1µ
When the power button is pressed, nothing happens, no fan activity is heard and power indicator is not light up.
Discharge
BAT_T
BAT_V
BAT_C
BAT_D
U13
Keyboard
BIOS
W83L950D
2
3
BAT_CLK
BAT_DATA
J703
Battery Connector
P31
R344
2.7K
+VDD3
R385
2.7K
P23
3
4
+VDD3
3
PD2
BAV99
2
1
+VDD3
3
PD3
BAV99
2
1
PR13
0
PR14
0
PQ504
2N7002
PR511
33K
ADEN#14
+DVMAIN
PR512
100K
BATT
G
S
D
2
3
1
6
7
8
5
PQ506
AO4407
JO10
SPARKGAP-6
PC526
1000P
PC527
0.01µ
JP1
SPARKGAP-6
4
8.1 No Power-6
+VDD3
DS
G
+VDD3S
R1
R378
100K
Q49
SI2301DS
D20
BAS32L
Q40
DDTC144TCA
RP502
10K
L81
120Z/100M +VDD3
12 KBC_PWRON_VDD3S
ADEN#
PQ507
DTC144WCA
PR509
226K
ADINP
PD505
SCS140P
AK +PWR_VDDIN
72
81
63
54
RP4
22*4
PC617
1000P
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U709
South 
Bridge
ICH6-M
P11
ICH_PWRBTN 7
ICH_PWRBTN#
R347
0
Q45
FDV301N
RSMRST#
8H8_RSMRST
S
D
G
When the power button is pressed, nothing happens, no fan activity is heard and power indicator is not light up.
Power Controller
8.1 No Power-7
18
1PWRBTN#
R12
1K
SW2
TCD010-PSS11CET
C7
1000P
U13
Keyboard
BIOS
W83L950D
P23
+VDD3_AVREF
+VDD3
+KBC_CPUCORE
C325
10µ
PU12
SC486
P29
+DVMAIN
+1.8V_P
+0.9VS_P
H8_PWRON
PU2
LTC3728L
P27
+DVMAIN +5VS_P
H8_PWRON
+VDD3
R435
10K
C388
0.01µ R396
100K
H8_RESET#
MN
VCC
RESET
GND
U21
IMP811
P26
25
29
X2
8MHz
C326
22P
28
C330
22P
21
KBC_X-
KBC_X+
R328
1M
+3VS_P
H8_PWRON
2
1
4
53
U726
AHC1G08DCK
+VDD3
H8_RESET#
5H8_PWRON_SUSB#
+VDD3S
R358
10K
U6C
74AHC14_V
+VDD3
56
147
PWRON_SUSB#
PWRON_SUSB6#
R69
0U504
AO4419
P26
+3V +3VS
PWRON_SUSB5#
R43
0
+5V +5VS
U502
AO4419
P26
+DVMAIN +1.5VS_P
PU6
ISL6227
P28
U6A
74AHC14_V
+VDD3
12
147
PWRON_SUSB1# +1.05VS_P
+2.5V
+2.5VS
Q12
AO3413
P26
U6D
74AHC14_V
+VDD3
98
147
PWRON_SUSB3#
+DVMAIN +1.8V_P
PU12
SC486
P29
U6E
74AHC14_V
+VDD3
11 10
147
PWRON_SUSB4# +0.9VS_P
+DVMAIN
+CPU_CORE
PU5
ISL6218
P30
U6B
74AHC14_V
+VDD3
34
147
PWRON_SUSB2#
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There is no display on both LCD and VGA monitor after power on although the LCD and monitor is known-good. 
8.2 No Display-1
No Display
Monitor
or LCD module
OK?
Replace monitor
or LCD.
Board-level
Troubleshooting
System
BIOS writes
error code to port
378H?
Yes
No
Yes
No
Refer to port 378H
error code description
section to find out 
which part is causing 
the problem.
Make sure that CPU module,
DIMM memory are installed
Properly.
Display
OK?
Yes
No
Correct it.
To be continued
Clock,reset and power checking
Check system clock, 
reset circuit and 
reference power
Replace
Motherboard
1.Try another known good CPU module,
DIMM module and BIOS.
2.Remove  all of I/O device ( HDD,
CD-ROM…….) from motherboard
except LCD or monitor. 
Display
OK?
1. Replace faulty part.
2. Connect the I/O device to the M/B    
one at a time to find out which part 
is causing the problem. 
Yes
No
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U13
W83L950D
P23
56PCICLK_KBC70
R114
33
U709
South Bridge
ICH6-M
P11
46
8
SMBCLK SMB_CLK
PCICLK_ICH
R207
2.2K
R206
2.2K
+VDD3S
To J714,J713
P8
47 SMBDATA SMB_DATA
33R93
R131 12.1
52 14M_ICH
12 CLK_USB48
54
24
STOP_PCI#
STOP_CPU#
CLK_ICH
55
33R98
R80 33
R97 33
R96 33
26
27
CLK_ICH#
CLK_SATA
CLK_SATA#
25
33R95
Q13
2N7002
G
S
D
Q14
2N7002
G
S
D
+3VS
R144
10K
R142
10K
PCICLK_F0
R103
10K
+3VS
FS_A
R76
10K
CLK_PCI_STOP#
CLK_CPU_STOP#
R127 33
R126 33
44
43
HCLK_CPU
HCLK_CPU#
R123 33
R122 33
36
35
CLK_ITP_CPU
CLK_ITP_CPU#
R111 33
R113 33
31
30
R125 33
R124 33
41
40
HCLK_MCH
HCLK_MCH#
CLK_GMCH
CLK_GMCH#
****** System Clock Check ******
8.2 No Display-2
U711
CPU
DOTHAN
P2
49
50
X1
14.318MHz
C97
56P
C98
56P
21
U7
Clock
Generator
ICS954226
P9
U710
North Bridge
GMCH
P4
39 R136 475
U715
CB712
P18
R94 33 5
PCICLK_CARD
J716
P20
PCICLK_MINIPCI 25
R92 33 R710 0
9
U717
RTL8100CL
P15
4PCICLK_LAN28
R104
33
L32
120Z/100M
+3VS C80
2.2µ C78
2.2µ
L31
120Z/100M +3VS_CLK
U14
SST49LF004A
P24
3PCICLK_FWH31
R105
33
R99 33
R87 33
R101 33
R100 33
17
18
14
15
DREFSSCLK
DREFSSCLK#
DREFCLK
DREFCLK#
133 MHzHLL
100 MHz (Default)HLH
BCLK FrequencyFS_AFS_BFS_C
R71 1K
R72 1K
16
53
CFG1
CFG2
FS_B
FS_C
HBSEL0
HBSEL1
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PLT_RST# 4
5
6
14
7
+3VS
FWH_PCIRST#
U14
System
BIOS
P24
JL20
JP_NET10 2
U10B
74AHC08_V
GMCH_RST#
JL21
JP_NET10
To North Bridge U710
LAN_RST#
JL26
JP_NET10
J710
CDROM 
Connector
P145RSTDRV#
+5VS
R311
10K 
Q18
DDTC144TCA
1
2
3
14
7
+3VS
KBC_PCIRST# U13
W83L950D
P23
JL19
JP_NET10 64
U10A
74AHC08_V R319
0 
U724
88SA8040
P14
JL18
JP_NET10
17
IDE_RST#
+5VS
R293
10K 
Q17
DDTC144TCA
IDE_RST#
PCIRST#
U10C
74AHC08_V
9
10
8
14
7
+3VS
PCI_PCIRST#
U715
Card Bus
CB712
P18
CARD_GRST#
U717
LAN Controller
P15
27LAN_PCIRST#
26MINIPCI_PCIRST# J716
MINI-PCI Slot
P20
JL22
JP_NET10
JL23
JP_NET10
JL25
JP_NET10
****** Power Good & Reset Circuit Check ******
8.2 No Display-3
U709
South 
Bridge
ICH6-M
P9
VRMPWRGD 12
+3VS
14
13
7
11
U10D
74AHC08_V
From PU5
P30
U711
CPU
Dothan
P2
U710
North Bridge
Intel 915PM
P4
PWROK
+3VS
C374
0.1µ
R392
10K
VCC
RESET
GND
U20
MAX809
P26
J507
MDC
U517
Audio Codec
ALC655
P21
11 ACRST#
25
P21
HPWRGD
+VCCP
R169
200
HCPURST#
3
1
2
PWROK
R548
22 ICH_VGATE
PWROK
JL17
JP_NET10 J723
MXM
Connector
MXM_RST# P5
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Display
OK?
Replace faulty
LCD or monitor.
Display
OK?
VGA Controller Failure
LCD No Display
1. Confirm LCD panel or monitor is good 
and check the cable are connected  
properly.
2. Try another known good monitor or 
LCD module.   
Remove all the I/O device & cable from 
motherboard except LCD panel or 
extended monitor.
Connect the I/O device & cable to 
the M/B one at a time to find out 
which part is causing the problem.
Yes
No
Yes
No
Re-soldering.
One of the following parts on the mother-board may be 
defective, use an oscilloscope to check the following signal or 
replace the parts one at a time and test after each replacement.
Board-level
Troubleshooting
Replace
Motherboard
Yes
No
8.3 VGA Controller Test Error LCD No Display-1
There is no display or picture abnormal on LCD although power-on-self-test is passed.
Check if 
J1, J2 are cold
solder?
Parts
U710
U709
U13
J506
J1
J2
J723
Signals
+3VS
LVDS_TX[0..2]+
LVDS_TX[0..2]-
LVDS_CLK+
LVDS_CLK-
LVDS_ENBKL
H8_ENABKL
Parts
L10~L13
SW1
R3
C1
R1
Signals
ENABKL
BLADJ
COVER_SW
Daughter BoardMain Board
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L19
120Z/100M
+3VS
R31
1M
F1
2A
Q4
AO4419
S
D
2
3
1
6
7
8
5
G
R28
0
1,2
C10
1µ
LVDS_ENVDD C15
0.22µ
8.3 VGA Controller Test Error LCD No Display-2
There is no display or picture abnormal on LCD although power-on-self-test is passed.
U710
North Bridge
Intel 915PM
P5
17
19
20
PANEL_ID0
PANEL_ID1
PANEL_ID2
J2
LCD Connector
P10
LVDS_CLK
LVDS_CLK#
EDID_CLK
EDID_DATA
LVDS_TX2
LVDS_TX2#
LVDS_TX1
LVDS_TX1#
13
15
19
21
27
25
22
20
U709
South Bridge
ICH6-M
P9
LCD
Inverter Board
+3VS
R13
20K
+3VS
R14
20K
+3VS
R15
20K
J1
Inverter
P10
L23
120Z/100M
+VDD3S 9
ENABKL_VGA
U13
Keyboard BIOS
W83L950D
P23
L25
120Z/100M
+DVMAIN 1,2
3
L22
130Z/100M
L21
130Z/100M 4
C22
0.01µ
C11
1000P
C13
0.1µ
C12
0.1µ
R3
0
+3VS
LVDS_ENBKL
H8_ENABKL
80
BLADJ
11
H8_LIDSW#16
R1
470K
+3V
R511
1K
Cover Switch
SW1
30V/0.1A
C1
0.1µ
LVDS_ENBKL 1
2
PANEL_ID3
+3VS
R25
20K
S
D
G
R33
10K
Q5
2N7002 J723
MXM_Connector
P5
IGP_LVDS_CLK
IGP_LVDS_CLK#
IGP_EDID_CLK
IGP_EDID_DATA
IGP_LVDS_TX2
IGP_LVDS_TX2#
IGP_LVDS_TX1
IGP_LVDS_TX1#
From J723
P5
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8.4 External Monitor No Display-1
There is no display or picture abnormal on CRT monitor, but it is OK for LCD.
Yes Re-soldering.
No
One of the following parts on the mother-board may be 
defective, use an oscilloscope to check the following signal or 
replace the parts one at a time and test after each replacement.
Parts:
U710
U2
J702
J723
L11
L2
L10
L30
Signals:
+3VS
CRT_DDDA
CRT_HSYNC
CRT_VSYNC
CRT_DDCK
CRT_RED
CRT_GREEN
CRG_BLUE
Check if 
J702
are cold solder?
Display
OK?
External Monitor No Display
1. Confirm monitor is good and check
the cable are connected properly. 
2. Try another known good  monitor.     
Remove all the I/O device & cable from 
motherboard except monitor.
Display
OK?
Replace faulty  monitor.
Connect the I/O device & cable 
to the M/B one at a time to find 
out which part is causing the 
problem.
Yes
No
Yes
No
Board-level
Troubleshooting
Replace
Motherboard
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8.4 External Monitor No Display-2
There is no display or picture abnormal on CRT monitor, but it is OK for LCD.
IGP_CRT_RED
IGP_CRT_GREEN
IGP_CRT_BLUE
1
2
3
CON_RED
CON_GREEN
CON_BLUE
L2
130OHM/100M
L11
130OHM/100M
L10
130OHM/100M
JO52JO53 JO51
IGP_CRT_DDDA
IGP_CRT_HSYNC
IGP_CRT_VSYNC
IGP_CRT_DDCK
12
14
72
63
54
81
CP1
47P*4
U710
North Bridge
Intel 915PM
GMCH
P5
J702
P10
External DVI Connector
CON_DDDA
13CON_HSYNC
CON_VSYNC
15CON_DDCK
L568
130Z/100M
L569
130Z/100M
L15
130Z/100M
L14
130Z/100M
1A
2A
1Y
2Y
U2
SN74LVC2G125
P10
VCC 6
3
2
5
8
JO48
JO47 JO49
JO50
J723
MXM_Connector
139
141
220
218
R216
0
R219
0
DVI_DDDA
CRT_HSYNC
CRT_VSYNC
DVI_DDCK
CRT_RED
CRT_GREEN
CRT_BLUE
144
140
136
+DVMAIN
L30
120Z/100M
+3VS
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8.5 Memory Test Error-1
Extend DDRAM is failure or system hangs up.
Memory Test Error
One of the following components or signals on the motherboard 
may be defective ,Use an oscilloscope to check the signals or 
replace the parts one at a time and test after each replacement.
Test
OK? Correct it.
Yes
No
Parts:
U710
U7
J713
J714
R691
R692
R606
R242
C285
C604
Signals:
1. Check if on board SDRAM chips are no cold  
solder.
2. Check  the extend SDRAM  module is installed 
properly. ( J713,J714)
3. Confirm the SDRAM socket (J713,J714) is 
ok,no band pins.
If your system host bus clock running at 
266MHZ then make sure that SO-DIMM 
module meet require of  PC 266.
Test
OK?
Yes
No
+1.8V
+3VS
S[A..B]_MA[0..13] 
CKE#[0..3]
CS#[0..3]
ODT[0..3]
S[A..B]_BS#[0..2]
S[A..B]_CAS#
S[A..B]_RAS#
S[A..B]_WE#
S[A..B]_DQS#[0..7]
S[A..B]_DQS[0..7]
S[A..B]_DM[0..7]
S[A..B]_DQ[0..63]
Board-level
Troubleshooting
Replace
Motherboard
Replace the faulty 
DDRAM module.
SMBDATA
SMBCLK
NB_CLK _DDR[0,1,3,4]
NB_CLK _DDR[0,1,3,4]#
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8.5 Memory Test Error-2
Extend DDRAM is failure or system hangs up.
R243,R263….
56
+0.9VS
SMBDATA
SMBCLK
J713
P8
DDR SODIMM
+DDR2_VREF
R606
75
+1.8V
R242
75
C304
0.1µ
C604
2.2µ
C295
2.2µ
S[A..B]_DQS#[0..7], S[A..B]_DQS[0..7]
S[A..B]_A[0..13], CKE#[0..3], CS#[0..3], ODT[0..3] 
S[A..B]_BS#[0..2], S[A..B]_CAS#, S[A..B]_RAS#, S[A..B]_WE#
S[A..B]_DM[0..7], S[A..B]_DQ[0..63]
NB_CLK_DDR[0,1,3,4], NB_CLK_DDR[0,1,3,4]#
U7
Clock
Generator
ICS954226
SMBDATA
SMBCLK
R692
10K
R691
10K
+3VS
47
46
SA_DQS#[0..7], SA_DQS[0..7]
SA_MA[0..13], CKE#[0..1], CS#[0..1], ODT[0..1] 
SA_BS#[0..2], SA_CAS#, SA_RAS#, SA_WE#
SA_DM[0..7], SA_DQ[0..63]
NB_CLK_DDR[0,1], NB_CLK_DDR[0,1]#
J714
P8
DDR SODIMM
SB_DQS#[0..7], SB_DQS[0..7]
SB_MA[0..13], CKE#[2..3], CS#[2..3], ODT[2..3] 
SB_BS#[0..2], SB_CAS#, SB_RAS#, SB_WE#
SB_DM[0..7], SB_DQ[0..63]
NB_CLK_DDR[3,4], NB_CLK_DDR[3,4]#
C285
0.1µ
P9
U710
North Bridge
915PM
GMCH
P4P7
SMBDATA
SMBCLK
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8.6 Keyboard (K/B) Touch-Pad (T/P) Test Error-1
Error message of keyboard or touch-pad failure is shown or any key does not work.
Keyboard or Touch-Pad
Test Error
Try another known good Keyboard 
or Touch-pad.
Test
Ok?
Replace the faulty 
Keyboard or Touch-Pad.
Check
J4, J5
for cold solder?
Yes
No
One of the following parts or signals on the motherboard
may be defective, use an oscilloscope to check the signals 
or replace the parts one at a time and test after each 
replacement.
Yes
No
Re-soldering.
Parts
U13
U14
U709
X2
SW3
SW4
F2
J4
J5
L48
Signals
+3VS
+VDD3
+KBC_CPUCORE
KI[0..7]
KO[0..15]
T_CLK
T_DATA
Is K/B or T/P
cable connected to notebook
properly?
Yes
No Correct it.
Board-level
Troubleshooting
Replace
Motherboard
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C330
22P
28
29
C326
22P
X2
8MHZ
R328
1M
T_CLK
T_DATA
6
9
L47 130Z/100M 11,12
9,10
TP_CLK
TP_DATA
U709
South Bridge
ICH6-M
+VDD3 71
U13
Keyboard 
BIOS
W83L950D
8.6 Keyboard (K/B) Touch-Pad (T/P) Test Error-2
Error message of keyboard or touch-pad failure is shown or any key does not work.
U14
SYSTEM 
BIOS
SST49LF004A
P24
P11
SERIRQ 69
13~15,17 LAD[0..3] 65~68
J5
+5V
L48
120Z/100MHZ
C537
0.1µ
Touch-Pad
P24
F2
0.5A/POLYSW
1,2
SW_RIGHT 5,6
7,8
SW_LEFT
R346
10K
R348
10K
+5VS
74
+KBC_CPUCORE
R704
10K
+3VS
LAD[0..3]
P23
KI[0..7]
KO[0..15]
17~24
1~16
Internal
Keyboard Connector
P23
J4
55~62
39~54
KBD_US/JP# 25
R146
10K
+3VS
LFRAME#
LFRAME#
23 63
+3VS
7
32,1
C694
0.1µ
8
25,27
R317            4.7K
R315            4.7K C709
4.7µ
KBD_US/JP#
R168
0
C541
47P
C542
47P
C539
47P
C540
47P
L72 130Z/100M
SW3
1
5
32
4
SW4
1
5
32
4
+5V
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Hard Disk Drive
Test Error
One of the following parts or signals on the motherboard may 
be defective, use an oscilloscope to check the signals or replace 
the parts one at a time and test after each replacement.
Yes
No
Re-boot
OK? Replace the faulty parts.
1. Check if BIOS setup is OK?.
2. Try another working drive.
Check the system driver for proper 
installation.
No
Re - Test
OK? End
Yes
Board-level
Troubleshooting
8.7 Hard Disk Drive Test Error-1
Either an error message is shown, or the drive motor spins non-stop, while reading data from or writing
data to hard disk.
Parts: Signals:
U709
U724
J715
X4
L64
D26
C294
C303
C309
C575
C577
C580
C582
+5VS
+5VS_HDD
SATA_RXN0
SATA_RXP0
SATA_TXN0
SATA_TXP0
DDRQ
DIORDY
DIRQ
DD[0..15]
DA[0..2]
DCS[0..1]#
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Motherboard
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+1.8VS_HDD 41,56
C126
12P
23
22
C125
12P
X4
25MHZ
R225
1M
+5VS
R422
0
D26
CL-190G
R439
470
SATA_TXP
SATA_TXN
SATA_RXP
SATA_RXN
C582
3900P
C580
3900P
C577
3900P
C575
3900P
SATA_TXP0
SATA_TXN0
SATA_RXP0
SATA_RXN0
27
28
32
31
DDRQ 2460
DIORDY 1855
DIRQ 1453
DD[0..15] 27~421~3,5~7…
DA[0..2] 9,10,1249~51
DCS[0..1]# 7,847,48
DACK#,DIOR#,DIOW#,DRST# 16,20,22,4454,58,59,16
R824
10k 11
R825
470 17
8.7 Hard Disk Drive Test Error-2
Either an error message is shown, or the drive motor spins non-stop, while reading data from or writing
data to hard disk.
U709
South Bridge
ICH6-M
P11
J715
P14
PATA HDD Connector
U724
88SA8040
P14
+3VS
R819
8.2K
R818
4.7K
R817
5.6K
+5VS
C303
0.1µ
C309
0.1µ
L64
120Z/100MHZ
3,4
+5VS_HDD
C294
22µ
HDD_LED# 6
+3VS_HDD 44
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8.8 CD-ROM Drive Test Error-1
An error message is shown when reading data from CD-ROM drive.
CD-ROM Driver 
Test  Error
One of the following parts or signals on the motherboard may 
be defective, use an oscilloscope to check the signals or replace 
the parts one at a time and test after each replacement.
Yes
No
Parts: Signals:
Test
OK? Replace the faulty parts.
1. Try another known good compact disk.
2. Check install for correctly.
Check the CD-ROM drive for 
proper installation.
No
Re - Test
OK?
U709
J710
L49
D27
C198
C208
C209
R198
R414
R441
R558
Yes
Board-level
Troubleshooting
+5VS
+5VS_CDROM
SD_D[0..15]
SDA1
IDEIRQ
SDDACK#
SIORDY
SDIOW#
SDDREQ
SDIOR#
SDA0
SDCS1#
SDCS3#
SDA2
End
Replace
Motherboard
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8.8 CD-ROM Drive Test Error-2
An error message is shown when reading data from CD-ROM drive.
J710
P14
CD-ROM Connector
R441
470
D27
CL-190G CD_LED#
+5VS
+3VS
R558
4.7K 5
37
6~21
38~42
31
29
28
27
25
22
24
35
36
34
33
+5VS
C198
10µ
C209
0.1µ
L49
120Z/100MHZ
IDEIRQ
SIORDY
SDIOW#
SDDREQ
SDDACK#
SDIOR#
SDA1
RSTDRV#
SD_D[0..15]
SDA0
SDCS1#
SDCS3#
SDA2
RSTDRV#
Refer Section 8.2(No display-3)
+5VS_CDROM
R414
0
IDEIRQ
SIORDY
SDIOW#
SDDREQ
SDDACK#
SDIOR#
SDA1
SDA0
SDCS1S#
SDCS3S#
SDA2
+3VS
R198
8.2K
U709
South Bridge
ICH6-M
P11
SD_D[0..15]
C208
0.1µ
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8.9 USB Test Error-1
An error occurs when a USB I/O device is installed.
Re-test
OK?
Test
OK?
USB Test Error
Check if the USB device is installed  
properly. 
No
Yes
No
Yes
Check the following parts for cold solder or one of the following 
parts on the mother-board may be defective, use an oscilloscope 
to check the following signal or replace the parts one at a time
and test after each replacement.
Replace another known good USB
device.
Board-level
Troubleshooting
Correct it.
Correct it.
Replace
Motherboard
Signals:
USB_OC0#
USB_OC1#
USBP[0..3]+
USBP[0..3]-
+VCC_USB_0
+VCC_USB_1
+VCC_USB_2
+VCC_USB_3
+5V
SW_VDD3
Parts:
U709
U501
U503
J701
J706
L5
L6
L10
L13
F503
F504
C2
C501
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8.9 USB Test Error-2
An error occurs when a USB I/O device is installed.
U709
South Bridge
ICH6-M
P11
U501
RT9701-CB
P14
USB Port
J701
2
3
L5
90Z/100M
32
14
1
+VCC_USB_1
L6
90Z/100M
41
23
A3
A2
A1
P14
R502
33K
C505
1000P
VIN
3
+5V
C172
1µ
VOUT0,1 1,5
C504
150µ
R503
47K +VCC_USB_0
R791
22 4CE C503
0.1µ
L502
120Z/100M
C502
0.1µ
L501
120Z/100M
SW_VDD3
From U13
P23
USB_OC0#
USBP0+
USBP0-
USBP1-
USBP1+
GND 2
R179
0
R180
0
R192
0
R186
0
F503
1.1A
U503
RT9701-CB
P14
USB Port
J706
2
3
L10
90Z/100M
23
41
1
+VCC_USB_3
L13
90Z/100M
14
32
A3
A2
A1
P14
R10
33K
C163
1000P
VIN
3
+5V
C178
1µ
VOUT0,1 1,5
C2
150µ
R159
47K +VCC_USB_2
R792
22 4CE C4
0.1µ
L1
120Z/100M
C769
0.1µ
L552
120Z/100M
SW_VDD3
From U13
P23
USB_OC1#
USBP2+
USBP2-
USBP3-
USBP3+
GND 2
R191
0
R190
0
R786
0
R787
0
F504
1.1A
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8.10 Audio Test Error-1
No sound from speaker after audio driver is installed.
Re-test 
OK?
Test 
OK?
Audio Failure
1. Check if  speaker cables are 
connected properly.
2. Make sure all the drivers are 
installed properly.
Try another known good
speaker, CD-ROM.
Board-level
Troubleshooting
Yes
Yes
Check the following parts for cold solder or one of the following parts on the 
motherboard may be defective,use an oscilloscope to check the following signal 
or replace parts one at a time and test after each replacement.
1.If no sound cause
of line out, check 
the following 
parts & signals:
2. If no sound cause 
of  MIC, check  
the following
parts & signals:
3. If no sound cause
of CD-ROM, check
the following
parts & signals:
No
No Parts:
U517
U19
U709
J509
J7
J3
L60
L61
Q48
L20
L18
L73
Q510
Signals:
AMP_RIGHT
AMP_LEFT
DEVICE_DECT
DECT_HP#OPT
SPDIFOUT
SPK_OFF
EAPD
OPTIN#
Parts:
U517
U709
U16
U17
MIC1
J720
J721
L71
L74
D4
L554
L543
L548
Signals:
+5VS
+3VS
+VA
MIC_VREF
MIC1
MIC2
MIC_EXT
Parts:
U709
U517
J710
R420
R407
R438
R419
R406
R434
Signals:
CDROM_LEFT
CDROM_RIGHT
CDROM_COMM
Correct it.
Correct it.
Replace
Motherboard
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AGND
R406
6.8K
R419
6.8K
8.10 Audio Test Error-2 (Audio In)
U517
Audio Codec
ALC655
U709
South Bridge
ICH6-M
U715
PC14510GHK
C335
1µ
C339
0.1µ
SBSPKR
R336
10K
CARDSPK 12 PC_BEEP
SPK_OFF
To next page
1
24
+VA
DVDD1,2
AVDD1,2
25,38
P21
P18
R337
47K
R338
47K
+VA
L71
120Z/100M
C755
0.1µ
+3VS 1,9
20
C380
1µ CDROM_RIGHT
J710
CDROM 
Connector
2
P14
R420
6.8K
18
C377
1µ CDROM_LEFT 1
R407
6.8K
19 C385
0.22µ CDROM_COMM 3
R438
0
AGND
+5VS
C581
10µ
C351
10µ
C725
0.1µ
ACSYNC
ACRST#
ACSDOUT
ACSDIN0
ACBITCLK
8
5
10
11
R391                 22
6R390                 22
P11
No sound from speaker after audio driver is installed.
C741
0.1µ
C748              1µ
C746              1µ
31
32
AGND
VIN
1OUT
U17
RT9167-47CB
5
P19
3CE ADJ 4
GND
2
C364
0.01µ
C763
1µ
C756
1µ
23
24
LINE_IN/L
LINE_IN/R
R436
0
R417
0
AGND
R418
22K
R437
22K
J721
Line In Jack
2
3,5 P21
L79
BEAD_600Z/100M
L78
BEAD_600Z/100M
C578
0.1µ
L74                    220
R205
0
D31
BAV70LT1
2
13
KBC_DEEP
From U13
P23
AVCC
U16
NC7S32
P21 Y
B
5
R335
1K
C334
100P
External MIC
J720
1
2
6
3
5
4
P21
R784
4.7K
R783
0
C764
1µ
21 MIC
22 MIC2
C757
1µ
CAGND
MIC1
28 MIC_VREF
R405
0
R412
5.6K
C751
1µ
R785
0MIC_EXT
CAGND
C381
100P
L554
BEAD_600Z/100M
JO518
MIC1 P21
+
-
1
2
L520
BEAD_600Z/100M JO517
AGND
L62
BEAD_600Z/100M
AGND
To next page
36
35
AOUT_R
AOUT_L
AMP_RIGHT
AMP_LEFT
R758
0
R767
0
R756
0
R771
0
R434
0
CAGND
C378
100P
CAGNDCAGND
J10 J9
SPDIFOUT
To next page
48
L543
BEAD_600Z/100M
AGND
34
12
CAGND
L548
120OHM/100MHZ
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8.10 Audio Test Error-3 (Audio Out)
U19
Audio
Amplifier
TPA0212
R343
1K
C345
100P
R380
1K
C365
100P
C354
100µ
R379
22
P22
J7
21
16
ROUT+
ROUT-
1
2RInternal Speaker
Connector
C341
100µ
R404
22
L83
BEAD_600Z/100M
L76
BEAD_600Z/100M
C356
1µ
C347
1µ
AMP_RIGHT 20
23
From previous page RLINEIN
RHPIN
+5VS
7,18 PVDD0/PVDD1
AGND
C342
100µ
L73
120Z/100M
C734
0.1µ
C735
0.1µ
22SPK_OFF#
GAIN1 3
R362
100K
R741
100K
GAIN0 2
J3
4
9
LOUT+
LOUT-
1
2LInternal Speaker
Connector
15,17 DEVICE_DECT
+5VS
R1
Q31
DDTC144TCA
R729
4.7K
GND
LLINEIN
AMP_LEFT
5
6LHPIN
From previous page
C360
1µ
C355
1µ
19 VDD
+AMPVDD
R61                    BEAD_600Z/100M
J509 P22
No sound from speaker after audio driver is installed.
P22
P22
AGND
+5VS
R365
1.3M
SPK_OFF
From previous page
R73
0
D514
BAW56
2
13
OPTIN#
GND
R208
1K
R60                    BEAD_600Z/100M
R18                  BEAD_600Z/100M
R20                  BEAD_600Z/100M
Drive
IC
LED
L539
BEAD_600Z/100M
SPDIFOUT 7
8
9
LINE OUT
From previous page
+VA
R400
10K
Q48
DDTC144TCA
DEVICE_DECT#
L547
BEAD_600Z/100M
3
2
1
5
4
L546                 0
AGND
AGND
+VA
R775
10K
R381
4.7K
DECT_HP#OPT
+3VS
DS
G
R1
R754
10K
Q509
AM2301P
Q510
DDTC144TCA
OPTIN#
L538
BEAD
600Z/100M
DECT_HP#OPT
DEVICE_DECT#
L77                BEAD_600Z/100M
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8.11 LAN Test Error-1
An error occurs when a LAN device is installed.
LAN Test Error
Yes
No
Test
OK?
No
Check if BIOS setup is ok. 
Re-test
OK?
Board-level
Troubleshooting
Check the following parts for cold solder or one of the following 
parts on the mother-board may be defective, use an oscilloscope
to check the following signal or replace the parts one at a time and 
test after each replacement.
Parts: Signals:
1.Check if the driver is installed properly.
2.Check if the notebook connect with the 
LAN properly.  
Yes
U717
U709
U511
J506
U507
X503
L508
L510
L511
L512
R682
R683
R667
R670
+3V
ICH_PME#
PCI_C/BE#[0..3]
PCIKRUN#
PCI_DEVESEL#
PMDI[0..3]+
PMDI[0..3]-
EECS
EECK
EEDI
EEDO
PCI_SERR#
Correct it.
Correct it.
Replace
Motherboard
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PCI_AD[0..31] 33…
PCI_AD20 46
ICH_PME# 31
PCI_C/BE[0..3] 44…
PCLKRUN# 65
PCI_DEVSEL# 68
PCI_FRAME# 61
PCI_GNT3# 29
PCI_REQ3# 30
PCI_INTE# 25
PCI_IRDY# 63
PCI_TRDY# 67
PCI_PAR 76
PCI_PERR# 70
PCI_SERR# 75
PCI_STOP# 69
MCT1
MCT3
MCT2
MCT4
24
21
18
15
R227
75
GND_45
R20
75
R204
75
R202
75
C263
1000P
MDI0+
MDI0-
MDI1+
MDI1-
MDI2+
MDI2-
MDI3+
MDI3-
13
14
16
17
19
20
22
23
1
2
3
6
4
5
7
8
L512
90Z/100M
32
14
L63
90Z/100M
L68
90Z/100M
L67
90Z/100M
PJTX0+
PJTX0-
PJRX1+
PJRX1-
MDO2+
MDO2-
MDO3+
MDO3-
U507
NS692408
P15 P15
J506
RJ45 LAN Connector
R670
49.9
R667
49.9
C651
0.01µ
GND
R683
49.9
R682
49.9
C668
0.01µ
GND
12
11
9
8
6
5
3
2
1
2
5
6
14
15
18
19
PMDI0+
PMDI0-
PMDI1+
PMDI1-
PMDI2+
PMDI2-
PMDI3+
PMDI3-
8.11 LAN Test Error-2
An error occurs when a LAN device is installed.
U717
LAN
Controller
RTL8100CL
P15
+3V
U709
South Bridge
ICH6-M
P11
LAN_XTAL1
LAN_XTAL2
C682
27P
121
122
C681
27P
X503
25MHZ
R686
1M
U511
93C46
P15
3
4
2
1
C660
1µ
DI
DO
SK
CS
GND
VCC
5
8
109
108
111
106
EEDI
EEDO
EECK
EECS
+3V
R696
3.6K
R508
100
R213
0
+AVDDL
+AVDDH
+DVDD
32
14
32
14
32
14
MiTac Secret
Confidential Document

134
80
8050QMA
50QMA N/B Maintenance
N/B Maintenance
Re-test
OK?
Test
OK?
PC Card Socket Failure
1. Check if the PC Card device is installed 
properly.
2. Confirm PC Card driver is installed ok. 
Yes
No
Yes
No
Change the faulty 
part then end.
Check the following parts for cold solder or one of the following 
parts on the mother-board may be defective, use an oscilloscope
to check the following signal or replace the parts one at a time and 
test after each replacement.
Parts:
U715
U709
U509
J8
R625
R604
R240
Try another known good PC 
Card or device.
Correct it
Board-level
Troubleshooting
Signals
PCI_REQ0#
PCI_SERR#
PCI_PERR#
PCI_DEVSEL#
PCI_FRAME#
PCI_IRDY#
PCI_TRDY#
PCI_STOP#
PCLKRUN#
PCI_PME#
PCI_GNT0#
PIC_PAR
PCI_AD[0..31]
PCI_C/BE#[0..3]
VCC5_EN#
VCC3_EN#
VPPD0
VPPD1
8.12 PC Card Socket Test Error-1
An error occurs when a PC card device is installed.
Replace
Motherboard
MiTac Secret
Confidential Document

135
80
8050QMA
50QMA N/B Maintenance
N/B Maintenance
PCI_C/BE#[0..3]
PCI_PAR, PCI_STOP#
PCI_SERR#, PCI_PERR#
PCI_AD[0..31] 
PCI_TRDY#, PCI_IRDY#
PCI_DEVSEL#
PCLKRUN#
PCI_GNT0#,  PCI_REQ0#
IDSEL
PCI_FRAME#
R240
43.2
R2_D2, R2_D14, R2_A18
CAUDIO, CSTSCHG
8.12 PC Card Socket Test Error-2
An error occurs when a PC card device is installed.
CRST#, CCD[1,2]#,CVS[1,2]#
CAD[0..31], CC/BE[0..3]#
CFRAME#, CIRDY#, CTRDY#, 
CREQ#, CGNT#, CINT#
CBLOCK#, CSTOP#, CDEVSEL#
U715
CardBus
Controller
CB712
P18
+3VS
C650
0.1µ
+CARD_VCC J8
Card Bus Socket
P16
C657
0.1µ
C662
0.1µ
+VPPOUT
VPPD0
VPPD1
VCC5_EN#
VCC3_EN#
3.3VA,B
AVCCC,B,A
AVPP
1
2
15
14
VCCD1
VCCD0
VDDP0
VDDP1
U509
CP2211A
P16
16
SHDN
5,6 5VA,B
C603
0.1µ
+5VS
+3VS
3,4
11-13
10
C610
0.1µ
CARD_VCC
VCC[1..10]
C628
0.1µ
VCCA1/2
U709
South Bridge
ICH6-M
P11
CARD_PCIRST#
Refer Section 7.2(No display-3)
OC 8
R604
10K
R625
10K
PCI_PME#
+3VS
CPAR, CPERR#, CSERR#
MiTac Secret
Confidential Document

Reference Material
Intel Pentium-M  Processor                                                       Intel, INC
Intel 915PM North Bridge Data Sheet                                         Intel, INC
Intel ICH6 South Bridge Data Sheet                            Intel, INC
System Explode View                                              Technology.Corp./MiTAC
8050QMA Hardware Engineering Specification                    Technology.Corp./MiTAC

SERVICE MANUAL FOR 8050QMA
Sponsoring Editor : Jesse Jan
Author : ZX.Xiao
Assistant Editor : Ping Xie
Publisher : MiTAC International Corp.
Address : 1, R&D Road 2, Hsinchu Science-Based Industrial, Hsinchu, Taiwan, R.O.C.
Tel : 886-3-5779250                                        Fax : 886-3-5781245
First Edition : Jun. 2005
E-mail : Willy.Chen @ mic.com.tw
Web : http: //www.mitac.com                         http: //www.mitacservice.com