Clevo W250HU, W250HUQ, W251HUQ C, W252HUM, W252HUM W255HU, W255HU W255HUM, W255HUM W258HUQ C Service Manual. Www.s Ma W250hu W250huq Manual

User Manual: Notebook Clevo W251HUQ-C - Service manuals and Schematics, Disassembly / Assembly. Free.

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Service Manual

W250HU/W250HUQ/W251HUQ-C/W252HUM/W252HUM-C

W255HU/W255HU-C/W255HUM/W255HUM-C/W258HUQ-C

Preface

Notebook Computer

W250HU/W250HUQ/W251HUQ-C/W252HUM/W252HUM-C/

W255HU/W255HU-C/W255HUM/W255HUM-C/W258HUQ-C

Service Manual

Preface

Notice

The company reserves the right to revise this publication or to change its contents without notice. Information contained

herein is for reference only and does not constitute a commitment on the part of the manufacturer or any subsequent ven-

dor. They assume no responsibility or liability for any errors or inaccuracies that may appear in this publication nor are

they in anyway responsible for any loss or damage resulting from the use (or misuse) of this publication.

This publication and any accompanying software may not, in whole or in part, be reproduced, translated, transmitted or

reduced to any machine readable form without prior consent from the vendor, manufacturer or creators of this publica-

tion, except for copies kept by the user for backup purposes.

Brand and product names mentioned in this publication may or may not be copyrights and/or registered trademarks of

their respective companies. They are mentioned for identification purposes only and are not intended as an endorsement

of that product or its manufacturer.

Version 2.0

March 2011

Trademarks

Intel and Intel Core are trademarks of Intel Corporation.

Windows® is a registered trademark of Microsoft Corporation.

Other brand and product names are trademarks and /or registered trademarks of their respective companies.

Preface

III

Preface

About this Manual

This manual is intended for service personnel who have completed sufficient training to undertake the maintenance and

inspection of personal computers.

It is organized to allow you to look up basic information for servicing and/or upgrading components of the W250HU/

W250HUQ/W251HUQ-C/W252HUM/W252HUM-C/W255HU/W255HU-C/W255HUM/W255HUM-C/W258HUQ-

C series notebook PC.

The following information is included:

Chapter 1, Introduction, provides general information about the location of system elements and their specifications.

Chapter 2, Disassembly, provides step-by-step instructions for disassembling parts and subsystems and how to upgrade

elements of the system.

Appendix A, Part Lists

Appendix B, Schematic Diagrams

Appendix C, Updating the FLASH ROM BIOS

Preface

IMPORTANT SAFETY INSTRUCTIONS

Follow basic safety precautions, including those listed below, to reduce the risk of fire, electric shock and injury to per-

sons when using any electrical equipment:

1. Do not use this product near water, for example near a bath tub, wash bowl, kitchen sink or laundry tub, in a wet

basement or near a swimming pool.

2. Avoid using a telephone (other than a cordless type) during an electrical storm. There may be a remote risk of elec-

trical shock from lightning.

3. Do not use the telephone to report a gas leak in the vicinity of the leak.

4. Use only the power cord and batteries indicated in this manual. Do not dispose of batteries in a fire. They may

explode. Check with local codes for possible special disposal instructions.

5. This product is intended to be supplied by a Listed Power Unit with an AC Input of 100 - 240V, 50 - 60Hz, DC Output

of 19V, 3.42A or 18.5V, 3.5A (65W) minimum AC/DC Adapter.

CAUTION

This Computer’s Optical Device is a Laser Class 1 Product

FCC Statement

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

This device may not cause harmful interference.

This device must accept any interference received, including interference that may cause undesired operation.

Preface

Instructions for Care and Operation

The notebook computer is quite rugged, but it can be damaged. To prevent this, follow these suggestions:

1. Don’t drop it, or expose it to shock. If the computer falls, the case and the components could be damaged.

2. Keep it dry, and don’t overheat it. Keep the computer and power supply away from any kind of heating element. This

is an electrical appliance. If water or any other liquid gets into it, the computer could be badly damaged.

3. Follow the proper working procedures for the computer. Shut the computer down properly and don’t forget to save

your work. Remember to periodically save your data as data may be lost if the battery is depleted.

Do not expose the computer

to any shock or vibration. Do not place it on an unstable

surface. Do not place anything heavy

on the computer.

Do not expose it to excessive

heat or direct sunlight. Do not leave it in a place

where foreign matter or mois-

ture may affect the system.

Don’t use or store the com-

puter in a humid environment. Do not place the computer on

any surface which will block

the vents.

Do not turn off the power

until you properly shut down

all programs.

Do not turn off any peripheral

devices when the computer is

on.

Do not disassemble the com-

puter by yourself. Perform routine maintenance

on your computer.

Preface

4. Avoid interference. Keep the computer away from high capacity transformers, electric motors, and other strong mag-

netic fields. These can hinder proper performance and damage your data.

5. Take care when using peripheral devices.

Power Safety

The computer has specific power requirements:

• Only use a power adapter approved for use with this computer.

• Your AC adapter may be designed for international travel but it still requires a steady, uninterrupted power supply. If you are

unsure of your local power specifications, consult your service representative or local power company.

• The power adapter may have either a 2-prong or a 3-prong grounded plug. The third prong is an important safety feature; do

not defeat its purpose. If you do not have access to a compatible outlet, have a qualified electrician install one.

• When you want to unplug the power cord, be sure to disconnect it by the plug head, not by its wire.

• Make sure the socket and any extension cord(s) you use can support the total current load of all the connected devices.

• Before cleaning the computer, make sure it is disconnected from any external power supplies.

Use only approved brands of

peripherals. Unplug the power cord before

attaching peripheral devices.

Do not plug in the power

cord if you are wet. Do not use the power cord if

it is broken. Do not place heavy objects

on the power cord.



Power Safety

Warning

Before you undertake

any upgrade proce-

dures, make sure that

you have turned off the

power, and discon-

nected all peripherals

and cables (including

telephone lines). It is

advisable to also re-

move your battery in

order to prevent acci-

dentally turning the

machine on.

Preface

VII

Preface

Battery Precautions

• Only use batteries designed for this computer. The wrong battery type may explode, leak or damage the computer.

• Do not continue to use a battery that has been dropped, or that appears damaged (e.g. bent or twisted) in any way. Even if the

computer continues to work with a damaged battery in place, it may cause circuit damage, which may possibly result in fire.

• Recharge the batteries using the notebook’s system. Incorrect recharging may make the battery explode.

• Do not try to repair a battery pack. Refer any battery pack repair or replacement to your service representative or qualified service

personnel.

• Keep children away from, and promptly dispose of a damaged battery. Always dispose of batteries carefully. Batteries may explode

or leak if exposed to fire, or improperly handled or discarded.

• Keep the battery away from metal appliances.

• Affix tape to the battery contacts before disposing of the battery.

• Do not touch the battery contacts with your hands or metal objects.

Battery Guidelines

The following can also apply to any backup batteries you may have.

• If you do not use the battery for an extended period, then remove the battery from the computer for storage.

• Before removing the battery for storage charge it to 60% - 70%.

• Check stored batteries at least every 3 months and charge them to 60% - 70%.



Battery Disposal

The product that you have purchased contains a rechargeable battery. The battery is recyclable. At the end of its useful life, under var-

ious state and local laws, it may be illegal to dispose of this battery into the municipal waste stream. Check with your local solid waste

officials for details in your area for recycling options or proper disposal.

Caution

Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer.

Discard used battery according to the manufacturer’s instructions.

Battery Level

Click the battery icon in the taskbar to see the current battery level and charge status. A battery that drops below a level of 10%

will not allow the computer to boot up. Make sure that any battery that drops below 10% is recharged within one week.

Preface

VIII

Preface

Related Documents

You may also need to consult the following manual for additional information:

User’s Manual on CD/DVD

This describes the notebook PC’s features and the procedures for operating the computer and its ROM-based setup pro-

gram. It also describes the installation and operation of the utility programs provided with the notebook PC.

System Startup

1. Remove all packing materials.

2. Place the computer on a stable surface.

3. Insert the battery and make sure it is locked in position.

4. Securely attach any peripherals you want to use with the computer

(e.g. keyboard and mouse) to their ports.

5. Attach the AC/DC adapter to the DC-In jack at the rear of the

computer, then plug the AC power cord into an outlet, and connect

the AC power cord to the AC/DC adapter.

6. Use one hand to raise the

lid/LCD to a comfortable viewing angle

(do

not exceed 130 degrees)

;

use the other hand (as illustrated in Figure

1) to support the base of the computer (Note: Never lift the computer

by the lid/LCD).

7. Press the power button to turn the computer “on”.



Shut Down

Note that you should al-

ways shut your com-

puter down by

choosing Shut Down

from the Start Menu.

This will help prevent

hard disk or system

problems.

130 ﾟ

Figure 1

Opening the Lid/LCD/

Computer with AC/DC

Adapter Plugged-In

Preface

Contents

Introduction ..............................................1-1

Overview .........................................................................................1-1

Specifications ..................................................................................1-2

External Locator - Top View with LCD Panel Open ......................1-4

External Locator - Front & Right Side Views .................................1-5

External Locator - Left Side & Rear View .....................................1-6

External Locator - Bottom View .....................................................1-7

Mainboard Overview - Top (Key Parts) .........................................1-8

Mainboard Overview - Bottom (Key Parts) ....................................1-9

Mainboard Overview - Top (Connectors) .....................................1-10

Mainboard Overview - Bottom (Connectors) ...............................1-11

Disassembly ...............................................2-1

Overview .........................................................................................2-1

Maintenance Tools ..........................................................................2-2

Connections .....................................................................................2-2

Maintenance Precautions .................................................................2-3

Disassembly Steps ...........................................................................2-4

Removing the Battery ......................................................................2-5

Removing the Hard Disk Drive .......................................................2-6

Removing the Optical (CD/DVD) Device ......................................2-8

Removing the System Memory (RAM) ..........................................2-9

Removing and Installing a Processor ............................................2-11

Removing the Wireless LAN Module ...........................................2-14

Removing the Keyboard ................................................................2-15

Part Lists ..................................................A-1

Part List Illustration Location ........................................................A-2

Top (W251HU/W252HU/W255HU SERIES) ...............................A-3

Top (W258HU SERIES) ................................................................A-4

Bottom ............................................................................................A-5

Combo ............................................................................................ A-6

DVD ............................................................................................... A-7

LCD (W25X HUQ) ....................................................................... A-8

LCD (W25X HUM) ....................................................................... A-9

Schematic Diagrams.................................B-1

System Block Diagram ...................................................................B-2

CPU 1/7 (DMI, PEG, FDI) .............................................................B-3

CPU 2/7 (CLK, MISC, JTAG) .......................................................B-4

CPU 3/7 (DDR3) ............................................................................B-5

CPU 4/7 (Power) .............................................................................B-6

CPU 5/7 (Graphics Power) .............................................................B-7

CPU 6/7 (GND) ..............................................................................B-8

CPU 7/7 (RESERVED) ..................................................................B-9

DDR3 SO-DIMM_0 .....................................................................B-10

DDR3 SO-DIMM_1 .....................................................................B-11

LVDS, Inverter .............................................................................B-12

HDMI, CRT ..................................................................................B-13

CougarPoint - M 1/9 .....................................................................B-14

CougarPoint - M 2/9 .....................................................................B-15

CougarPoint - M 3/9 .....................................................................B-16

CougarPoint - M 4/9 .....................................................................B-17

CougarPoint - M 5/9 .....................................................................B-18

CougarPoint - M 6/9 .....................................................................B-19

CougarPoint - M 7/9 .....................................................................B-20

CougarPoint - M 8/9 .....................................................................B-21

CougarPoint - M 9/9 .....................................................................B-22

New Card, Mini PCIE ...................................................................B-23

CCD, 3G, TPM .............................................................................B-24

Card Reader/LAN JMC251C .......................................................B-25

LAN (JMC251C), SATA HDD, ODD .........................................B-26

Preface

USB 3.0 NEC, USB Charger .......................................................B-27

KBC-ITE IT8518 ......................................................................... B-28

LED, MDC, BT ............................................................................ B-29

Audio Codec ALC269 .................................................................. B-30

USB, Fan, TP, Multi-Conn ........................................................... B-31

5VS, 3VS, 1.05VS, 1.5VS_CPU .................................................. B-32

VDD3, VDD5 ............................................................................... B-33

Power 1.5V/0.75V/1.8VS ............................................................. B-34

Power 1.05VS ............................................................................... B-35

Power 0.85VS ............................................................................... B-36

Power V-Core1 ............................................................................. B-37

Power V-Core2 ............................................................................. B-38

Charger, DC In .............................................................................B-39

Click Board ..................................................................................B-40

Audio Board/USB ........................................................................ B-41

Power Switch & LID Board ......................................................... B-42

External ODD Board .................................................................... B-43

Power Sequence ........................................................................... B-44

Updating the FLASH ROM BIOS......... C-1

To update the FLASH ROM BIOS you must: C-1

Download the BIOS ....................................................................... C-1

Unzip the downloaded files to a bootable CD/DVD/ or USB Flash

drive ................................................................................................ C-1

Set the computer to boot from the external drive ........................... C-1

Use the flash tools to update the BIOS ..........................................C-2

Restart the computer (booting from the HDD) .............................. C-2

Introduction

Overview 1 - 1

1.Introduction

Chapter 1: Introduction

Overview

This manual covers the information you need to service or upgrade the W250HU/W250HUQ/W251HUQ-C/

W252HUM/W252HUM-C/W255HU/W255HU-C/W255HUM/W255HUM-C/W258HUQ-C series notebook comput-

er. Information about operating the computer (e.g. getting started, and the Setup utility) is in the User’s Manual. Infor-

mation about dri-vers (e.g. VGA & audio) is also found in the User’s Manual. The manual is shipped with the computer.

Operating systems (e.g. Windows Vista/ Window 7, etc.) have their own manuals as do application softwares (e.g. word

processing and database programs). If you have questions about those programs, you should consult those manuals.

The W250HU/W250HUQ/W251HUQ-C/W252HUM/W252HUM-C/W255HU/W255HU-C/W255HUM/W255HUM-

C/W258HUQ-C series notebook is designed to be upgradeable. See Disassembly on page 2 - 1 for a detailed description

of the upgrade procedures for each specific component. Please take note of the warning and safety information indicated

by the “” symbol.

The balance of this chapter reviews the computer’s technical specifications and features.

Introduction

1 - 2 Specifications

1.Introduction

Specifications



Latest Specification Information

The specifications listed here are correct at the

time of sending them to the press. Certain items

(particularly processor types/speeds) may be

changed, delayed or updated due to the manu-

facturer's release schedule. Check with your

service center for more details.



CPU

The CPU is not a user serviceable part. Ac-

cessing the CPU in any way may violate your

warranty.

Processor Options

Intel® Core™ i7 Processor

i7-2620M (2.70GHz)

4MB L3 Cache, 32nm, DDR3-1333MHz, TDP 35W

Intel® Core™ i5 Processor

i5-2540M (2.60GHz), i5-2520M (2.50GHz), 

i5-2410M (2.30GHz)

3MB L3 Cache, 32nm, DDR3-1333MHz, TDP 35W

Intel® Core™ i3 Processor

i3-2310M (2.10GHz)

3MB L3 Cache, 32nm, DDR3-1333MHz, TDP 35W

Core Logic

Intel® HM65 Chipset

LCD

15.6" (39.62cm) HD/HD+ TFT LCD

Memory

Two 204 Pin SO-DIMM Sockets Supporting DDR3 1066/

1333MHz Memory

Memory Expandable up to 8GB

Video Adapter

Intel ® HM65 Integrated Video

Shared Memory Architecture of up to 1748MB

MS DirectX® 10 compatible

BIOS

One 32Mb SPI Flash ROM

AMI BIOS

Security

Security (Kensington® Type) Lock Slot

BIOS Password

Storage

(Factory Option) One Changeable 12.7mm(h) Optical

Device Type Drive (Super Multi Drive Module or Blu-Ray

Combo Drive Module)

One Changeable 2.5" 9.5 mm (h) SATA HDD

Audio

High Definition Audio Compliant Interface

2 * Built-In Speakers

Built-In Microphone

Communication

Built-In Gigabit Ethernet LAN

(Factory Option) 300K/1.3M Pixel USB PC Camera Module

(Factory Option) 3.75G/HSPA Mini-Card Module

WLAN/ Bluetooth Half Mini-Card Modules:

(Factory Option) Intel® Centrino® Wireless-N 100 (802.11b/

g/n)

(Factory Option) Intel® Centrino® Wireless-N 130 Wireless

LAN (802.11b/g/n) + Bluetooth 3.0

(Factory Option) Intel® Centrino® Wireless-N 1030 Wire-

less LAN (802.11b/g/n) + Bluetooth 3.0

(Factory Option) Third-Party Wireless LAN (802.11b/g/n)

(Factory Option) Third-Party Wireless LAN (802.11b/g/n) +

Bluetooth 3.0

Keyboard

Full-size “WinKey” keyboard (with numeric keypad)

Pointing Device

Built-in Touchpad

Mini Card Slots

Slot 1 for WLAN Module or Combo WLAN and Bluetooth

Module

(Factory Option) Slot 2 for 3.75G/HSPA Module

Introduction

Specifications 1 - 3

1.Introduction

Interface

Three USB 2.0 Ports

One HDMI-Out Port

One Headphone-Out Jack

One Microphone-In Jack

One RJ-45 LAN Jack

One DC-in Jack

One External Monitor Port

Card Reader

Embedded Multi-In-1 Card Reader

MMC (MultiMedia Card) / RS MMC

SD (Secure Digital) / Mini SD / SDHC/ SDXC

MS (Memory Stick) / MS Pro / MS Duo

Power

6 Cell Smart Lithium-Ion Battery Pack, 48.84WH

(Factory Option) 6 Cell Smart Lithium-Ion Battery Pack,

62.16WH

(Factory Option) 4 Cell Smart Lithium-Ion Battery Pack,

32.56WH

Full Range AC/DC Adapter

AC Input: 100 - 240V, 50 - 60Hz

DC Output: 19V, 3.42A or 18.5V, 3.5A (65W)

Energy Star 5.0 Compliant

Environmental Spec

Temperature

Operating: 5°C - 35°C

Non-Operating: -20°C - 60°C

Relative Humidity

Operating: 20% - 80%

Non-Operating: 10% - 90%

Dimensions & Weight

374mm (w) * 250mm (d) * 14.3 - 34.1mm (h)

2.3 kg (with 48.84WH Battery and ODD)

374mm (w) * 250mm (d) * 14.3 - 35.3mm (h)

2.3 kg (with 48.84WH Battery and ODD)

Introduction

1 - 4 External Locator - Top View with LCD Panel Open

1.Introduction

External Locator - Top View with LCD Panel Open

Figure 1

Top View

1. PC Camera

(Optional)

2. LCD

3. Power Button

4. LED Status

Indicators

5. Keyboard

6. Built-In

Microphone

7. Touchpad &

Buttons

15.6” (39.62cm)

Introduction

External Locator - Front & Right Side Views 1 - 5

1.Introduction

External Locator - Front & Right Side Views

Figure 2

Front View

1. LED Power

Indicator

Figure 3

Right Side View

1. Microphone-In

Jack

2. Headphone-Out

Jack

3. USB 2.0 Port

4. Optical Device

Drive Bay

5. Emergency Eject

Hole

FRONT VIEW

RIGHT SIDE VIEW

1 2 3 5

Introduction

1 - 6 External Locator - Left Side & Rear View

1.Introduction

External Locator - Left Side & Rear View

Figure 4

Left Side View

1. DC-In Jack

2. External Monitor

Port

3. RJ-45 LAN Jack

4. HDMI-Out Port

5. USB 2.0 Port

6. Vent

7. USB 2.0 Port

8. Multi-in-1 Card

Reader

LEFT SIDE VIEW

12345

678

Figure 5

Rear View

1. Security Lock Slot

2. Battery

REAR VIEW

Introduction

External Locator - Bottom View 1 - 7

1.Introduction

External Locator - Bottom View

Figure 6

Bottom View

1. Battery

2. Component Bay

Cover

3. Vent

4. Hard Disk Bay

Cover

5. Speakers

6. USIM Card Cover



Overheating

To prevent your com-

puter from overhea-

ting, make sure no-

thing blocks any vent

while the computer is

in use.

Introduction

1 - 8 Mainboard Overview - Top (Key Parts)

1.Introduction

Mainboard Overview - Top (Key Parts)

Figure 7

Mainboard Top

Key Parts

1. KBC-ITE IT8518

2. Audio Codec

ALC269

Introduction

Mainboard Overview - Bottom (Key Parts) 1 - 9

1.Introduction

Mainboard Overview - Bottom (Key Parts)

Figure 8

Mainboard Bottom

Key Parts

1. Memory Slots

DDR3 SO-DIMM

2. CPU Socket (no

CPU installed)

3. Platform Controller

Hub

4. Mini-Card

Connector (WLAN

Module)

Introduction

1 - 10 Mainboard Overview - Top (Connectors)

1.Introduction

Mainboard Overview - Top (Connectors)

Figure 9

Mainboard Top

Connectors

1. HDMI-Out Port

2. USB Port 2.0

3. USB 2.0 Port

4. Speaker Cable

Connector

5. Microphone

Cable Connector

6. Audio Board

Connector

7. TouchPad Cable

Connector 1

8. TouchPad Cable

Connector 2

9. Keyboard Cable

Connector

10. Switch Board

Cable Connector

Introduction

Mainboard Overview - Bottom (Connectors) 1 - 11

1.Introduction

Mainboard Overview - Bottom (Connectors)

Figure 10

Mainboard Bottom

Connectors

1. Battery

Connector

2. ODD Connector

3. HDD Connector

4. CMOS Battery

Connector

5. CPU Fan Cable

Connector

6. Multi-in-1 Card

Reader

7. RJ-45 LAN Jack

8. External Monitor

Port

9. DC-In Jack

10. CCD Cable

Connector

11. LCD Cable

Connector

Introduction

1 - 12

1.Introduction

Disassembly

Overview 2 - 1

2.Disassembly

Chapter 2: Disassembly

Overview

This chapter provides step-by-step instructions for disassembling the W250HU/W250HUQ/W251HUQ-C/W252HUM/

W252HUM-C/W255HU/W255HU-C/W255HUM/W255HUM-C/W258HUQ-C series notebook’s parts and subsys-

tems. When it comes to reassembly, reverse the procedures (unless otherwise indicated).

We suggest you completely review any procedure before you take the computer apart.

Procedures such as upgrading/replacing the RAM, optical device and hard disk are included in the User’s Manual but are

repeated here for your convenience.

To make the disassembly process easier each section may have a box in the page margin. Information contained under

the figure # will give a synopsis of the sequence of procedures involved in the disassembly procedure. A box with a 

lists the relevant parts you will have after the disassembly process is complete. Note: The parts listed will be for the dis-

assembly procedure listed ONLY, and not any previous disassembly step(s) required. Refer to the part list for the previ-

ous disassembly procedure. The amount of screws you should be left with will be listed here also.

A box with a  will also provide any possible helpful information. A box with a  contains warnings.

An example of these types of boxes are shown in the sidebar.



Information



Warning

Disassembly

2 - 2 Overview

2.Disassembly

NOTE: All disassembly procedures assume that the system is turned OFF, and disconnected from any power supply (the

battery is removed too).

Maintenance Tools

The following tools are recommended when working on the notebook PC:

• M3 Philips-head screwdriver

• M2.5 Philips-head screwdriver (magnetized)

• M2 Philips-head screwdriver

• Small flat-head screwdriver

• Pair of needle-nose pliers

• Anti-static wrist-strap

Connections

Connections within the computer are one of four types:

Locking collar sockets for ribbon connectors To release these connectors, use a small flat-head screwdriver to

gently pry the locking collar away from its base. When replac-

ing the connection, make sure the connector is oriented in the

same way. The pin1 side is usually not indicated.

Pressure sockets for multi-wire connectors To release this connector type, grasp it at its head and gently

rock it from side to side as you pull it out. Do not pull on the

wires themselves. When replacing the connection, do not try to

force it. The socket only fits one way.

Pressure sockets for ribbon connectors To release these connectors, use a small pair of needle-nose pli-

ers to gently lift the connector away from its socket. When re-

placing the connection, make sure the connector is oriented in

the same way. The pin1 side is usually not indicated.

Board-to-board or multi-pin sockets To separate the boards, gently rock them from side to side as

you pull them apart. If the connection is very tight, use a small

flat-head screwdriver - use just enough force to start.

Disassembly

Overview 2 - 3

2.Disassembly

Maintenance Precautions

The following precautions are a reminder. To avoid personal injury or damage to the computer while performing a re-

moval and/or replacement job, take the following precautions:

1. Don't drop it. Perform your repairs and/or upgrades on a stable surface. If the computer falls, the case and other

components could be damaged.

2. Don't overheat it. Note the proximity of any heating elements. Keep the computer out of direct sunlight.

3. Avoid interference. Note the proximity of any high capacity transformers, electric motors, and other strong mag-

netic fields. These can hinder proper performance and damage components and/or data. You should also monitor

the position of magnetized tools (i.e. screwdrivers).

4. Keep it dry. This is an electrical appliance. If water or any other liquid gets into it, the computer could be badly

damaged.

5. Be careful with power. Avoid accidental shocks, discharges or explosions.

•Before removing or servicing any part from the computer, turn the computer off and detach any power supplies.

•When you want to unplug the power cord or any cable/wire, be sure to disconnect it by the plug head. Do not pull on the wire.

6. Peripherals – Turn off and detach any peripherals.

7. Beware of static discharge. ICs, such as the CPU and main support chips, are vulnerable to static electricity.

Before handling any part in the computer, discharge any static electricity inside the computer. When handling a

printed circuit board, do not use gloves or other materials which allow static electricity buildup. We suggest that

you use an anti-static wrist strap instead.

8. Beware of corrosion. As you perform your job, avoid touching any connector leads. Even the cleanest hands pro-

duce oils which can attract corrosive elements.

9. Keep your work environment clean. Tobacco smoke, dust or other air-born particulate matter is often attracted

to charged surfaces, reducing performance.

10. Keep track of the components. When removing or replacing any part, be careful not to leave small parts, such as

screws, loose inside the computer.

Cleaning

Do not apply cleaner directly to the computer, use a soft clean cloth.

Do not use volatile (petroleum distillates) or abrasive cleaners on any part of the computer.



Power Safety

Warning

Before you undertake

any upgrade proce-

dures, make sure that

you have turned off the

power, and discon-

nected all peripherals

and cables (including

telephone lines). It is

advisable to also re-

move your battery in

order to prevent acci-

dentally turning the

machine on.

Disassembly

2 - 4 Disassembly Steps

2.Disassembly

Disassembly Steps

The following table lists the disassembly steps, and on which page to find the related information. PLEASE PERFORM

THE DISASSEMBLY STEPS IN THE ORDER INDICATED.

To remove the Battery: