Huawei Release Notes F Tanjim OTB Y210 Maintenance Manual
2014-08-11
User Manual: Huawei
Open the PDF directly: View PDF 
.
Page Count: 75
| Download | |
| Open PDF In Browser | View PDF |
Y210 Mobile Phone Maintenance Manual Issue 1.0 Date 2012-11-28 HUAWEI TECHNOLOGIES CO., LTD. Copyright © Huawei Technologies Co., Ltd. 2012. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd. Trademarks and Permissions and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders. Notice The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied. The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied. Huawei Technologies Co., Ltd. Address: Huawei Industrial Base Bantian, Longgang Shenzhen 518129 People's Republic of China Website: http://www.huawei.com Email: support@huawei.com Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. i Y210 Mobile Phone Maintenance Manual About This Document About This Document Author Prepared by R&D Date - Reviewed by Maintenance support team Date - Approved by Service representative Date - Change History Date Version Issue 1.0 (2012-11-28) Change Reason Section Description Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. Author ii Y210 Mobile Phone Maintenance Manual Contents Contents About This Document .................................................................................................................... ii 1 Product Overview ......................................................................................................................... 1 1.1 Appearance ....................................................................................................................................................... 1 1.2 Features ............................................................................................................................................................ 2 2 Applicable Scope and Precautions ............................................................................................ 4 2.1 Applicable Scope .............................................................................................................................................. 4 2.2 Precautions ....................................................................................................................................................... 4 2.3 How to Obtain Product and Repair Information .............................................................................................. 4 3 Exploded View............................................................................................................................... 5 4 Components on the PCBA ........................................................................................................... 7 5 Software Upgrade ......................................................................................................................... 9 5.1 Upgrade Preparation......................................................................................................................................... 9 5.2 Performing an Upgrade .................................................................................................................................... 9 6 Maintenance Tools ...................................................................................................................... 11 7 Disassembly Procedure .............................................................................................................. 13 8 Assembly Procedure ................................................................................................................... 17 9 Principles and Failure Analysis ............................................................................................... 21 9.1 Block Diagram ............................................................................................................................................... 21 9.1.1 Functions of the PCBA ......................................................................................................................... 22 9.2 Baseband Unit ................................................................................................................................................ 26 9.2.1 Power-on Management Circuits ............................................................................................................ 26 9.2.2 Charging Management Circuits ............................................................................................................ 30 9.3 RF Unit ........................................................................................................................................................... 31 9.3.1 RF Failure ............................................................................................................................................. 31 9.3.2 GPS ....................................................................................................................................................... 35 9.3.3 Wi-Fi/Bluetooth/FM Module ................................................................................................................ 35 9.4 Peripheral Circuits .......................................................................................................................................... 37 9.4.1 Display .................................................................................................................................................. 37 9.4.2 Camera .................................................................................................................................................. 40 Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. iii Y210 Mobile Phone Maintenance Manual Contents 9.4.3 USB....................................................................................................................................................... 43 9.4.4 Headset Jack.......................................................................................................................................... 44 9.4.5 Keys and Buttons .................................................................................................................................. 46 9.4.6 Tricolor Indicator and Touch Key Backlight Circuits ........................................................................... 47 9.4.7 Battery Connector ................................................................................................................................. 48 9.4.8 Accelerometer ....................................................................................................................................... 49 9.4.9 Compass ................................................................................................................................................ 50 9.4.10 Proximity Sensor ................................................................................................................................. 50 9.4.11 Vibration Motor ................................................................................................................................... 52 9.4.12 Receiver .............................................................................................................................................. 53 9.4.13 Microphone ......................................................................................................................................... 56 9.4.14 Touch Panel ......................................................................................................................................... 57 9.4.15 SIM Card............................................................................................................................................. 58 9.4.16 microSD Card ..................................................................................................................................... 59 10 Solder Points on the PCBA and BGA Chip ......................................................................... 61 11 Functional Tests......................................................................................................................... 67 11.1 MMI Test ...................................................................................................................................................... 67 11.2 Voice Call Test .............................................................................................................................................. 70 Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. iv Y210 Mobile Phone Maintenance Manual 1 Product Overview 1 Product Overview 1.1 Appearance Figure 1-1 shows the appearance of the HUAWEI Ascend Y210 mobile phone (Y210 for short). Figure 1-1 Y210 mobile phone Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 1 Y210 Mobile Phone Maintenance Manual 1 Product Overview 1.2 Features Table 1-1 describes the features of the Y210. Table 1-1 Features Item Description Dimensions (H x W x D) 12.4 mm x 117 mm × 62 mm Technical standards Y210-0010: W2100/W900, GSM900/1800/1900 Y210-0100: W2100/W900, GSM850/900/1800/1900 Y210-0151: W2100/W1900/W850, GSM850/900/1800/1900 Y210-0200: W2100/W900, GSM850/900/1800/1900 Y210-0251: W2100/W1900/W850, GSM850/900/1800/1900 GSM = Global System for Mobile Communications Frequency bands Y210-0010: W2100/W900, GSM900/1800/1900 Y210-0100: W2100/W900, GSM850/900/1800/1900 Y210-0151: W2100/W1900/W850, GSM850/900/1800/1900 Y210-0200: W2100/W900, GSM850/900/1800/1900 Y210-0251: W2100/W1900/W850, GSM850/900/1800/1900 Frequency ranges: Issue 1.0 (2012-11-28) WCDMA 900 MHz: 880–915 MHz (uplink), 925–960 MHz (downlink) WCDMA 2100 MHz: 1920–1980 MHz (uplink), 2110–2170 MHz (downlink) WCDMA 1900 MHz: 1850–1910 MHz (uplink), 1930–1990 MHz (downlink) WCDMA 850 MHz: 824–849 MHz (uplink), 869–894 MHz (downlink) GSM 850 MHz: 824–849 MHz (uplink), 869–894 MHz (downlink) GSM 900 MHz: 880–915 MHz (uplink), 925–960 MHz (downlink) GSM 1800 MHz: 1710–1785 MHz (uplink), 1805–1880 MHz (downlink) GSM 1900 MHz: 1850–1910 MHz (uplink), Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 2 Y210 Mobile Phone Maintenance Manual 1 Product Overview Item Description 1930–1990 MHz (downlink) WCDMA = Wideband Code Division Multiple Access Weight < 130 g with battery Type Bar type Antenna Built-in Card type Subscriber identity module (SIM) and universal subscriber identity module (USIM) Charger 5 V, 550 mA Battery 1250 mAh Li-ion Display Ports Standby time: up to 305 hours Talk time: up to 670 minutes (depending on network conditions) Resolution 320 x 480 pixels Liquid crystal display (LCD) type Thin film transistor (TFT) Color 262K LCD size 3.5 inches Charging port Micro Universal Serial Bus (USB) port USB port Micro USB port microSD card slot microSD card slot Headset jack 3.5 mm (LRGM) Maximum transmit power 23–33 dBm Static sensitivity ≤ –104 dBm Temperature Operating temperature: –10°C to +55°C Storage temperature: –40°C to +70°C Humidity Issue 1.0 (2012-11-28) Operating humidity: 5% to 95% RH Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 3 Y210 Mobile Phone Maintenance Manual 2 Applicable Scope and Precautions 2 Applicable Scope and Precautions 2.1 Applicable Scope This document provides repair instructions for technicians at service centers authorized by Huawei. Being Huawei proprietary, this document is accessible only for authorized service centers and companies. Although every effort was made to ensure the accuracy of this document, errors may still exist. If you find any errors or have any suggestions, please contact Huawei's customer service. 2.2 Precautions Only qualified technicians are allowed to perform repair and calibration. Perform all operations in electrostatic discharge (ESD) rooms and wear ESD wrist straps throughout the operations. Ensure that all the components, screws, and insulators are properly installed after repair and calibration, and that all cables and wires are installed and connected correctly. Ensure that the soldering is lead-free and compliant with eco-friendly requirements. 2.3 How to Obtain Product and Repair Information To obtain product and maintenance information, visit Huawei website at: http://www.huaweidevice.com/cn/technicaIndex.do. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 4 Y210 Mobile Phone Maintenance Manual 3 Exploded View 3 Exploded View Figure 3-1 shows the exploded view of the Y210. Figure 3-1 Exploded view The components listed in the following table are structural parts of the phone and cannot be used as reference to request spare parts. Table 3-1 lists the components in the exploded view. Table 3-1 Components in the exploded view No. Description Quantity 1 Touch panel 1 Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 5 Y210 Mobile Phone Maintenance Manual 3 Exploded View No. Description Quantity 2 Front cover assembly 1 3 Power button flexible printed circuit (FPC) assembly 1 4 Receiver 1 5 LCD 1 6 LCD conductive rubber 2 7 Receiver insulation film 1 8 Printed circuit board assembly (PCBA) 1 9 Volume button FPC assembly 1 10 Motor 1 11 Speaker 1 12 Main antenna support assembly 1 13 Camera support foam 1 14 Camera 1 15 Rear cover assembly 1 16 Battery 1 17 Screws 8 18 Battery cover 1 Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 6 Y210 Mobile Phone Maintenance Manual 4 Components on the PCBA 4 J1101 headset jack Faults caused if damaged: Handset malfunctions J1601 touch panel port Faults caused if damaged: Touch panel malfunctions Components on the PCBA J1302 LCD port Faults caused if damaged: LCD malfunctions L901 motor contact J901 USB port Faults caused if damaged: USB connection failure U6100 Wi-Fi chip Faults caused if damaged: Wi-Fi malfunctions U1204 Gravity sensor Faults caused if damaged: Gravity sensor malfunctions U1303 backlight driver IC Faults caused if damaged: Black screen J1402 SIM card holder Faults caused if damaged: SIM card identification failure U6000 Bluetooth & FM chip Faults caused if damaged: Bluetooth or FM malfunctions J1403 dual card SIM 2 card holder Faults caused if damaged: SIM card identification failure U601 MCP chip Faults caused if damaged: Power-on failure or software failure U3801 WCMDA/GSM transception chip Faults caused if damaged: RF function error J1605 volume button FPC port Faults caused if damaged: Volume button malfunctions U3302 power module, PA Faults caused if damaged: U401 CPU-MSM7225A Faults caused if damaged: Power-on failure or system not responding U3501 power module, PA Faults caused if damaged: GSM900 transmit error U201 PMIC-PM8029 Faults caused if damaged: Power failure U3201 RF switch Faults caused if damaged: Network registration failure J902 battery connector Faults caused if damaged: Battery power supply failure SP1501 speaker contact Faults caused if damaged: Speaker malfunctions J3204 RF connector Faults caused if damaged: Network registration failure U3401 power module, PA Faults caused if damaged: RF transmit error Issue 1.0 (2012-11-28) J1401 SD card slot Faults caused if damaged: SD card malfunctions U4202 power module, PA Faults caused if damaged: RF transmit error Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 7 Y210 Mobile Phone Maintenance Manual 4 Components on the PCBA D1601 tri-color indicator Faults caused if damaged: Indicator off SP1502 receiver contact MIC1501 microphone Faults caused if damaged: No sounds for recordings Issue 1.0 (2012-11-28) J1608 J1608 power button spring Faults caused if damaged: Power button malfunctions D1602 D1603 D1604 power button LED Faults caused if damaged: Functional keys backlight off Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 8 Y210 Mobile Phone Maintenance Manual 5 Software Upgrade 5 Software Upgrade 5.1 Upgrade Preparation Prepare the items listed in Table 5-1 before a software upgrade. Table 5-1 Items to be prepared Item Description Remarks Upgrade environment Computer The computer is used to copy upgrade software. microSD card The microSD card must have more than 1 GB free space. Battery The battery level must not be lower than 30%. Main upgrade package dload/UPDATE.app Vendor upgrade package vendor_XXX_XXX/UPDATE.app Using the microSD card Normal upgrade Upgrade file Upgrade method Forcible upgrade 5.2 Performing an Upgrade To upgrade the Y210, perform the following steps: Step 1 Format the microSD card. Step 2 Create a dload folder in the microSD card's root directory. Step 3 Copy the upgrade file to the dload folder. Step 4 Insert the microSD card to the Y210, and power on the phone. On the standby screen, enter *#*#2846579#*#*, select SD card upgrade, and touch Confirm. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 9 Y210 Mobile Phone Maintenance Manual 5 Software Upgrade Before the upgrade, NV items backup is performed (if the phone's NV items has never been backed up). Then, the phone restarts and the upgrade starts. The upgrade progress is displayed on the LCD. Figure 5-1 shows the upgrade progress. Figure 5-1 Upgrade progress After the upgrade, the phone restarts and the NV items are restored. Step 5 After the phone is upgraded using the main upgrade package, upgrade the phone using the vendor upgrade package in the same way. ----End If the phone fails to start, use either of the following methods to perform a forcible upgrade: Install the battery on the phone. If the screen splashes, remove the battery, wait for 5 seconds, and re-install the battery. Press and hold the volume up and down buttons, and press the power button. The phone then enters forcible upgrade mode. The software download process is similar to that during a normal upgrade. If no battery is installed, press and hold the volume up and down buttons, and connect the charger. The phone then enters forcible upgrade mode. It is recommended that you upgrade the software using the charger. If the upgrade still fails, replace the microSD card and try again. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 10 Y210 Mobile Phone Maintenance Manual 6 Maintenance Tools 6 Maintenance Tools Name: constant-temperature heat gun Usage: to heat components Name: constant-temperature heat gun Usage: to heat components Name: soldering iron Usage: to maintain and solder components Name: direct current (DC) power supply Usage: to supply DC current Name: soldering table Usage: to secure the PCBA Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 11 Y210 Mobile Phone Maintenance Manual 6 Maintenance Tools Name: lead-free solder wire Usage: to solder components Name: digital multimeter Usage: to measure during repair Name: toolkit Usage: to assemble and disassemble phone Name: electric screwdriver Usage: to fasten and remove screws Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 12 Y210 Mobile Phone Maintenance Manual 7 Disassembly Procedure 7 Disassembly Procedure 1. Wear an electro-static discharge (ESD) wrist strap, and ensure that the strap is grounded properly. 2. Follow the Y210 disassembly instructions. 3. Remove the battery cover: Press the upper part of the battery cover and push it towards the bottom. 4. Remove the battery. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 13 Y210 Mobile Phone Maintenance Manual 7 Disassembly Procedure 5. Remove the eight screws from the rear cover. 7. Use the disassembly tab to release the latch in the upper left corner. 9. Remove the volume key. Issue 1.0 (2012-11-28) 6. Use the disassembly tab to release the latch in the upper left corner. 8. Use a cover opener to release the latches between the rear cover and the front cover. 10. Release the volume key FPC. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 14 Y210 Mobile Phone Maintenance Manual 7 Disassembly Procedure 11. Release the BTB connector cable between the touch panel and the LCD. 12. Release the two latches on the PCBA. 13. Remove the PCBA. 14. Release the BTB connector, and remove the camera. 15. Remove the LCD. Issue 1.0 (2012-11-28) 16. Apply a protective film on the LCD. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 15 Y210 Mobile Phone Maintenance Manual 7 Disassembly Procedure 17. Apply a protective film on the inner side of the touch panel. 18. Remove the power button FPC. 20. Remove the speaker. 19. Remove the receiver. 21. Remove the motor. 22. The phone is then disassembled. The Y210 has two versions: single card and dual card versions. The pictures for disassembling and assembling a single-card Y210 are used. The phone disassembly and assembly methods for the two versions are the same. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 16 Y210 Mobile Phone Maintenance Manual 8 Assembly Procedure 8 Assembly Procedure 2. Follow the Y210 assembly instructions. 1. Wear an ESD wrist strap, and ensure that the strap is grounded properly. 3. Install the motor. Issue 1.0 (2012-11-28) 4. Install the speaker. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 17 Y210 Mobile Phone Maintenance Manual 8 Assembly Procedure 5. Install the receiver. 6. Install the power button FPC. 7. Remove the protective film from the LCD. 8. Install the LCD. Ensure that the two latches are snapped in place and that the LCD is even. 9. Place the PCBA on the front cover. Ensure that the PCBA is in good contact with the front cover at the power button position. Snap the latches in place. Issue 1.0 (2012-11-28) 10. Gently press the PCBA to close the latches and secure the PCBA. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 18 Y210 Mobile Phone Maintenance Manual 8 Assembly Procedure 11. Snap the LCD's BTB connector and then the touch panel's BTB connector in place. 12. Install the volume button: Install the volume button FPC into the ZIF connector, and attach them to the front cover. 14. Install the eight screws onto the rear cover. 13. Install the rear cover: Snap the rear cover's bottom, and press its top. 15. Install the battery: Insert it into the battery compartment bottom first. Issue 1.0 (2012-11-28) 16. Install the battery cover. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 19 Y210 Mobile Phone Maintenance Manual 8 Assembly Procedure 17. The phone is then assembled. The Y210 has two versions: single card and dual card versions. The pictures for disassembling and assembling a single-card Y210 are used. The phone disassembly and assembly methods for the two versions are the same. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 20 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis 9 Principles and Failure Analysis 9.1 Block Diagram Figure 9-1 shows the block diagram of the Y210. Figure 9-1 Block diagram MSM7X2XA (The Y210U uses the MSM7225A) is the baseband signal processing chip, mainly responsible for processing the input and output of image, video, audio, memory support, RF interface, and connectivity signals. The baseband chip provides keypad, LCD, microSD card, Wi-Fi, Bluetooth, camera, microphone, and touch panel interfaces. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 21 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis The PM8029 is mainly responsible for: Detecting the connection and disconnection of the external power supply. Supplying power to the phone. Providing analog multi-channel switch, real-time clock circuit, temperature compensated crystal oscillator (TCXO) clock circuit, motor driver circuit, and speaker driver circuit. The RTR6285A is the radio frequency (RF) signal processing chip, responsible for converting Universal Mobile Telecommunications System (UMTS)/GSM uplink/downlink RF signals and using I/Q signals to exchange data with the baseband chip. 9.1.1 Functions of the PCBA By function, the PCBA can be divided into four subsystems: baseband, RF, power, and user interface subsystems. Table 9-1 describes the subsystems' modules and units, as well as their functions. Table 9-1 PCBA subsystems' modules, units, and their functions Subsystem Module Unit Function Baseband subsystem MSM7225A Modem subsystem The modem subsystem includes the ARM11 processor, modem digital signal processor (DSP), modem Advanced High-performance Bus (AHB), interruption controller, and sleep controller. The ARM9 is a 400 MHz modem processor, responsible for modulation and demodulation of WCDMA, Global Positioning System (GPS), and GSM signals. Application subsystem The subsystem includes Advanced RISC Machines (ARM) A5 processor, application DSP, and dedicated data mover. The A5 processor has a clock rate of 1400 MHz, supporting function modules such as the microSD card, EBI2, UART/USIM, I2C, GPIO, and clock modules. User interface processing unit Issue 1.0 (2012-11-28) UART = universal asynchronous receiver/transmitter I2C = Inter-Integrated Circuit GPIO = General Purpose Input/Output Provides camera, pulse code modulation (PCM), broadband codec, vocoder, RF, HKADC, LCD, microSD card, USB, UART, USIM card, southbound interface (SBI), GPIO, JTAG/ETM, and keypad Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 22 Y210 Mobile Phone Maintenance Manual Subsystem Module 9 Principles and Failure Analysis Unit Function interfaces. Multimedia and game engine The multimedia and game engine of the MSM7227 runs Mpeg/jpeg hardware engine and game engine, JAVA accelerator, and provides MP3/MMS/MIDI functions. MP3 = MPEG audio layer-3 MMS = multimedia messaging service MIDI = musical instrument digital interface Power supply voltage monitoring Lists objects being monitored, such as the external power supply input, Li-ion battery, and charger. Temperature monitoring Monitors the battery temperature. NAND NAND feature, power consumption, file system support Stores applications and NV items. Capacity: 4 GB. DDR1 RAM Memory Provides storage space for running applications. Capacity: 512 GB. PM8029 RAM = random access memory RF subsystem WCDMA, and GSM/DCS signal transmission and reception AFC circuit, APC circuit, AGC circuit, and each component Performs the RF function of WCDMA signal reception and transmission, and mainly includes the RTR6285A RF chip and the peripheral circuit. GPS GPS reception Receives and processes GPS signals and mainly includes the RTR6285A chip and the peripheral circuit. Bluetooth interface Bluetooth/Wi-Fi/Frequency modulation (FM) 3-in-1 module Performs baseband function for Bluetooth and Wi-Fi signals, and transmits and receives Bluetooth and Wi-Fi RF signals. It mainly includes the Bluetooth and Wi-Fi module and its peripheral circuit. Wi-Fi interface Same as the Bluetooth interface. Same as the Bluetooth interface. Oscillator and frequency synthesizer Crystal oscillators Generates highly accurate VCTCXO frequency for the 19.2 MHz local reference clock. The RTR6285A has a built-in local oscillator (LO) providing clock frequency for transmitting and receiving WCDMA and GPS signals. VCTCXO = Voltage Controlled Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 23 Y210 Mobile Phone Maintenance Manual Subsystem 9 Principles and Failure Analysis Module Unit Function Temperature Compensated Crystal Oscillator User interface subsystem Antenna External antenna, internal interface component, antenna protection The phone uses internal antennas for wireless communication, supporting WCDMA high and low frequency bands. The antennas are the main antenna, GPS antenna, diversity antenna, Wi-Fi/Bluetooth antenna, and FM antenna (headset). Coupler Power coupler Couples part of the power output from the WCDMA power amplifier to the RTR6285A for power monitoring. UART interface - MSM7225A subsystem's UART1 interface for Bluetooth. USB interface Driver, protection circuit, output interface component The peripheral circuit, protection circuit and interface connectors of the USB interface in the MSM7225A subsystem. It is the major data service channel for the engineering sample, and can be used to debug and test devices during product development. USIM card interface Power supply, protection circuit, USIM card holder Mainly includes the USIM card holder and related connection circuits. Keypad and backlight Keypad driver circuit, external keypad, backlight light emitting diode (LED) control circuit Supports GPIO for keypad scanning. Provides backlight LED. When a key is pressed, the backlight is on. Works in conjunction with PM8029 to provide the keypad backlight brightness adjustment function. Color LCD and backlight LCD driver, interface mode, and backlight control Phone's LCD with 256K colors. The brightness of the LCD backlight can be adjusted by users. Speaker for playback of MIDI ringtone Driver mode, connection mode, speaker component Plays polyphonic ringtones for incoming calls. The maximum power of the speaker is 500 mW. It has good frequency response for playing 20–20000 Hz ringtones. It can also play monophonic MP3 audio files. Receiver Driver mode, connection mode, receiver component Emits sound during a call. Microphone Interface circuit, connection mode, microphone component The phone has two built-in microphones to eliminate the Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 24 Y210 Mobile Phone Maintenance Manual Subsystem Module 9 Principles and Failure Analysis Unit Function environmental noise. Power subsystem Headset Headset, headset interface circuit, microphone interface circuit The phone provides a headset jack to output music playback audio or voice during a call. The microphone on the headset cable can pick sound and input it into the phone. The headset jack is compatible with iPhone headsets. Vibration motor interface Driver mode, connection mode, motor When there is an incoming call, the motor can vibrate to notify the user of the call. Accelerometer I2C interface control Senses acceleration to help implement game functions. Battery Li-ion battery 3.7 V/1700 mAh (the battery must be certified and comply with relevant safety regulations). External power supply (travel charger) Adapter and interface component The charger meets the requirements of China, Europe, the USA, and Australia. Charger specifications: 90–240 V, 45–55 Hz, AC input. The model differs with different markets. The output voltage of the charger is 5 ±0.25 V. The charger must be CE and CCC certified. The charger's output current must be able to charge the battery and supply power to the phone for normal operation at the same time. The charging current requirement is 550 mA. Power distribution network and power management function Power distribution network Includes filter networks and PCB traces for the power supply. PM8029 enhanced function Battery management, charging circuit, charging mode, and charging protection Manages battery charging and discharging, provides overcharging and over-discharging protection, and charges the capacitor that supplies power to maintain the real-time clock (RTC). Board circuit power management (power-on/off analysis) Mainly controls the low-dropout (LDO) regulator power supply to flexibly manage power supply. Based on the service status and the requirements of the protocols and Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 25 Y210 Mobile Phone Maintenance Manual Subsystem 9 Principles and Failure Analysis Module Unit Function power-saving analysis, the board software manages the power supplies to the units on the board to reduce power consumption. RTC The built-in RTC circuit uses a sleep clock of 32.768 kHz to provide precise time. HKADC Contains 8 multipurpose pin (MPP) interfaces. Analog-to-digital conversion can be implemented inside the PM8029. TCXO driver The PM8029 has a built-in TCXO driver providing two analog signal output channels and two digital signal output channels. UVLO Provides the Undervoltage-Lockout (UVLO) function. When the input voltage is lower than the threshold for a specific period of time, the phone powers off. Overheat protection When the on-chip junction temperature exceeds 150°C, the phone powers off. Internal driver circuit Provides one vibration motor driver and one speaker driver. Interrupt management The built-in interrupt manager handles related interrupt signals. USB driver Supports USB 2.0; does not support USB On-The-Go (USB OTG). 9.2 Baseband Unit 9.2.1 Power-on Management Circuits On the Y210U, most power supplies are provided by the power management chip PM8029. The PM8029 provides two types (switched-mode power supply and LDO regulators) of programmable voltage regulators with a total of 24 output channels. Table 9-2 lists the voltage regulator parameters. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 26 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis Table 9-2 Voltage regulator specifications Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 27 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis Troubleshooting Process To troubleshoot the power-on failure, check whether the I/O connector (battery connector) is damaged. If the I/O connector (battery connector) is not damaged, use a DC regulated power supply to supply power to the phone, and test the phone's current. The power-on failure may be caused by any of the following conditions: No current Figure 9-2 No current Power-on failure: no current Is the battery connector J902 normal? N Replace J902 Y Is Q201 normal? N Replace Q201 Y Re-solder or replace U201 Issue 1.0 (2012-11-28) Weak current Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 28 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis Figure 9-3 Weak current Power-on failure: weak current Reinstall the phone's firmware. Is the problem solved? Y End N Is U210's output voltage normal? N Replace U201 Y Does X301 have 32.768 kHz output? N Replace X301 Y Replace U601 and reinstall the phone's firmware. Is the problem solved? Y End N Replace U401 Excessive current Excessive current is caused by short circuits. When excessive current occurs, to prevent damage to components, do not connect the charger to the phone. Power-on failure due to excessive current is usually the result of short-circuited VBAT circuit. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 29 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis Figure 9-4 Excessive current Power-on failure: excessive current Test the VBAT circuit. Is it a short circuit? N Check whether VPH_PWR and PM outputs are short-circuited. Y N Is J902 normal? Re-solder or replace J902. Y Is Q201 normal? N Replace Q201. Y Remove U201. Do short circuits still exist? Y Replace U201. N Replace U401. 9.2.2 Charging Management Circuits Figure 9-5 Charging management circuits Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 30 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis Troubleshooting Charging Failure Figure 9-6 Charging failure Charging failure N Is the charger working properly? Replace the charger Y Is J901 poorly soldered? Y Re-solder J901 N N Is the battery in good contact with the battery connector? Repair or replace J902 Y N Does VPH_PWR have voltages? Replace U201 Y Is there voltage difference Y Q201' pin 2 and between pin 3? Y N Replace Q201 Y Is the battery damaged? Replace the battery N End 9.3 RF Unit 9.3.1 RF Failure Troubleshooting Transmission Failure Issue 1.0 (2012-11-28) GSM/DCS transmission failure Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 31 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis Before starting the following process, ensure that the USIM card and the antenna are well connected. Figure 9-7 GSM/DCS transmission failure GSM/DCS transmission failure N When the RF cable is not inserted, are J3204's pin 1 and pin 2 connected? Check J3204 Y N Are U3201's control signals normal? Check U3201 and U401 Y N Are U3501's GSM output and DCS output approximately 33 dBm and 30 dBm respectively? Y Check U3501 N Do U3801's Y pin A10 and pin A9 have output? Check U3801 Y Check U401 Table 9-3 and Table 9-4 describe the working status of the GSM/DCS power amplifier U3501. Table 9-3 U3501 working status (1) GSM_PA_EN PA H ON L OFF Table 9-4 U3501 working status (2) GSM_PA_BAND Mode L GSM850/900 H DCS1800/1900 Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 32 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis H: voltage higher than 1.3 V. L: voltage lower than 0.5 V. WCDMA transmission failure (use W2100 as an example) Before starting the following process, ensure that the USIM card and the antenna are well connected. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 33 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis Figure 9-8 WCDMA transmission failure W2100 transmission failure Check J3204 N When the RF cable is not inserted, are J3204's pin 1 and pin 2 connected? Check J3204 Y N Are U3201's control signals normal? Check U3201 and U401 Y N Is the insertion loss between U3304's pin 1 and pin 3 approximately 1.1–1.4 dB? Check U3304 Y N Is the insertion loss Y U3302's pin 2 and between pin 9 approximately 0.6 dB? Y Check U3302 N Check U3301 Is U3301's output 24 dB? Y Y N Does U3801's pin A7 have output? Check U3801 Check U401 Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 34 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis Table 9-5 and Table 9-6 describe the working status of the WCDMA power amplifier. Table 9-5 WCDMA power amplifier working status (1) PA_ON PA H ON L OFF Table 9-6 WCDMA power amplifier working status (1) PA_R PA_R1 Mode L L HI Power L H MI Power H H LO Power H: 1.3–1.8 V. L: < 0.5 V. 9.3.2 GPS The GPS channel consists of filter U4102, filter U4103 and LNA U4101. GPS signals are sent to the RTR6285A's input interface after going through the filters and LNA. Figure 9-9 shows the circuit. Figure 9-9 GPS circuit 9.3.3 Wi-Fi/Bluetooth/FM Module The Y210 uses a WCN2243 (Bluetooth/FM 2-in-1 module)+AR6005 (Wi-Fi module)+switch to realize Wi-Fi, Bluetooth, and FM functions. The Bluetooth and Wi-Fi functions share one antenna and one RF switch. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 35 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis The MSM7225A provides PCM and UART interfaces that are directly connected to the Bluetooth module's PCM and UART signal output. Table 9-7 describes the signals' definitions. Table 9-7 Signal definitions (PCM and UART interfaces) MSM7225A Signal Definition GPIO_44 UART1_CTS_N "ready to receive" signal sent from the host to the slave. GPIO_43 UART1_RFR_N "clear to send" signal sent from the slave to the host. GPIO_46 UART1_TX Transmission signal GPIO_45 UART1_RX Reception signal GPIO_69 AUX_PCM_DIN PCM input GPIO_68 AUX_PCM_DOUT PCM output GPIO_70 AUX_PCM_SYNC PCM synchronization GPIO_71 AUX_PCM_CLK PCM clock GPIO_107 MSM_WAKES_BT Waking up the host GPIO_83 BT_WAKES_MSM Waking up the Bluetooth The MSM7225A provides SDIO3 interfaces that are directly connected to the Wi-Fi module's SDIO signal output. Table 9-8 describes the signals' definitions. Table 9-8 Signal definitions (SDIO3 interface) MSM7225A Signal Definition GPIO_64 SDC2_DATA3 GPIO_65 SDC2_DATA2 GPIO_66 SDC2_DATA1 GPIO_67 SDC2_DATA0 GPIO_62 SDC2_CLK Clock GPIO_63 SDC2_CMD Control signal Data The PM8029 provides audio input interfaces that are directly connected to the FM module's left and right channels. Table 9-9 describes the signals' definitions. Table 9-9 Signal definitions (audio input interfaces) BCM4330 Network MSM7225A Description FM_RXP FM_ANT - FM antenna (headset) Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 36 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis BCM4330 Network MSM7225A Description FM_RXN - - - FM_VDD2P5 SR_AVDD2P5 - - FM_AOUT1 FM_OUT_L PM8029 LINE_IN_LP FM OUTPUT FM_AOUT2 FM_OUT_R PM8029 LINE_IN_RM FM OUTPUT 9.4 Peripheral Circuits 9.4.1 Display The MSM7225A uses Mobile Industry Processor Interfaces (MIPIs) to send instructions and data to the LCD. The Y210's LCD uses MIPIs, supporting a 60 Hz refresh rate, and requiring only one pair of differential clock lines, one pair of differential signal lines, and one pair of power supply lines. The LCD also supports frame synchronization, using the MDP_VSYNC signals (GPIO_097) as data transmission synchronization signals to avoid screen tearing. Dot matrix: Half-size VGA (HVGA, 480 x 320 pixels) Color: 256K colors Figure 9-10 shows the connections between the MSM7225A and the LCD. Figure 9-10 Connections between the MSM7225A and the LCD Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 37 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis Table 9-10 describes the signals' definitions. Table 9-10 Signal definitions Category Description Name in the Circuit Network MSM7225A GPIO/PM8029 MPP Power supply Digital power supply input VREG_S3 VREG_S3 (PM8029) Analog power input VREG_L12_2P8 5 VREG_L12_2P85 (PM8029) MIPI data MIPI_DSI_LAN E1_P MIPI_DSI_LANE1_P MIPI data MIPI_DSI_LAN E1_N MIPI_DSI_LANE1_N Synchronization signal Frame synchronization clock MDP_VSYNC_ P GPIO97 Clock signal MIPI clock MIPI_DSI_CLK _P MIPI_DSI_CLK_P MIPI clock MIPI_DSI_CLK _N MIPI_DSI_CLK_N Control signal Reset LCD_RESET_N GPIO129 Identification signal LCD model identification LCD_ID0 GPIO9 (PM8029) LCD model identification LCD_ID1 GPIO10 (PM8029) Data Y210's LCD backlight control: The Y210 uses a 3.5-inch LCD whose backlight is provided by six LEDs connected in series. The backlight LEDs are controlled by the backlight driver chip TPS61160A. The ground resistance of the driver chip pin FB is set to 10 Ω, providing up to 20 mA current to the LEDs (duty:100%). The backlight brightness (driver output current) is controlled by the PWM signal. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 38 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis Figure 9-11 LCD backlight circuit Backlight signals Issue 1.0 (2012-11-28) Anode of the backlight LED LED_A Anode of the backlight LED Cathode of the backlight LED LED_K Cathode of the backlight LED Brightness control signals from the LCD PWM_OU T Reserved Brightness control signals from the phone's main chip LCD_BL_ PWM GPIO1 (PM8029) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 39 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis Troubleshooting Display Failure Figure 9-12 Display failure LCD fails to display Y Re-install the phone's firmware. Is the problem solved? End N Clean the LCD 50-pin male & female connectors. Snap them in place again. Is the problem solved? Y End N Replace the LCD. Is the problem solved? Y End N Return the phone to the factory 9.4.2 Camera The Y210 uses a 3.0-megapixel full-frame camera. The 3.0-megapixel full-frame camera uses a 24-pin board to board (BTB) connector and is controlled by the I2C bus. The data is transmitted in MIPI mode. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 40 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis Figure 9-13 Camera circuit Table 9-11 Signal definitions Signal Name Pin Camera Voltage Remarks CAM_VIO VREG_S3 (analog switch) IOVDD 1.8 - CAM_VIO VREG_S3 (analog switch) DVDD 1.8 - VREG_CAM_2P85 VREG_L17 (PM8029) AVDD 2.85 Power supply to the camera autofocus motor CAM_AVDD VREG_L17 (PM8029) AVDD 2.85 - CAMIF_MCLK GPIO_015 (MSM7225A) MCLK 1.8 Camera reference clock MCAMIF_SHDN GPIO_119 (MSM7225A) PWDN 1.8 Camera shutdown signal CAM_VCM_PD_N GPIO_07 (MSM7225A) - 1.8 Camera autofocus motor control signal I2C0_SCL GPIO_060 (MSM7225A) I2C_SCL 1.8 I2C control signal I2C0_SDA GPIO_061 (MSM7225A) I2C_SDA 1.8 - MCAMIF_RESET GPIO_049 (MSM7225A) Reset 1.8 Reset signal MCAMIF_ID GPIO_9 (MSM7225A) ID 1.8 Module supplier identification MIPI_CSI2_CLK_P MIPI_CSI2_CLK_P PCLK - MIPI clock MIPI_CSI2_CLK_N MIPI_CSI2_CLK_N NCLK - MIPI clock Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 41 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis Signal Name Pin Camera Voltage Remarks MIPI_CSI2_LANE1_P MIPI_CSI2_LANE1_P MIPI DATA - Data communication signal MIPI_CSI2_LANE1_N MIPI_CSI2_LANE1_N MIPI DATA - Data communication signal MIPI_CSI2_LANE0_P MIPI_CSI2_LANE0_P MIPI DATA - Data communication signal MIPI_CSI2_LANE0_N MIPI_CSI2_LANE0_N MIPI DATA - Data communication signal The camera interface circuit is designed for compatibility with multiple types of cameras. The Y210 uses a 3.0-megapixel full-frame camera, so the CAM_VCM_PD_N and VREG_CAM_2P85 lines are not used. Troubleshooting Camera Failure Figure 9-14 Camera failure Failure to take photos or record video using the camera Y Reinstall the phone's firmware. Is the problem solved? End N Y Is J1001 poorly soldered or are its contacts defective? Re-solder or replace J1001 N Y Replace the camera. Is the problem solved? End N Return the phone to the factory Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 42 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis 9.4.3 USB Figure 9-15 USB circuit Troubleshooting USB Connection Failure Figure 9-16 USB connection failure USB connection failure Y Use a normal USB cable. Is the problem solved? End N Y Is the 5-pin mini USB connector poorly soldered? Re-solder the USB connector N Re-install the phone's firmware. Is the problem solved? Y End N Return the phone to the factory Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 43 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis 9.4.4 Headset Jack The Y210 has a 3.5-mm headset jack. When the headset jack has no headset inserted, the headset jack's pin 3 and pin 4 are open, and the headset detection voltage is at a high level. After a headset is inserted, pin 3 and pin 4 are closed, and the headset detection voltage is at a low level, indicating the insertion of a headset. The HS_DETECT (GPIO86) pin is used to detect the headset insertion. The HSED_MICBIAS (PM8029/HSED_BIAS1) supplies power to the headset microphone. The HSED_HSKEY_ADC (PM8029 MPP5) is used to detect the headset button press. The Y210 supports only the LRGM headsets and does not support LRMG headsets. Figure 9-17 Headset jack circuit Issue 1.0 (2012-11-28) No sound comes from the headset during a call. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 44 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis Figure 9-18 No sound Af ter a call is established, no sound can be heard from the headset N Is the in-call volume set to a normal level? End Y Y Replace the headset. Is the problem solved? End N N Is a headset icon displayed on the screen? Replace the headset jack Y Return the phone to the f actory The headset button cannot be used to answer a call. Figure 9-19 Headset button malfunctioning The headset button cannot be used to answer a call Y Replace the headset. Is the problem solved? End N Insert the headset. Is the voltage on J1101's pin 4 at a low level? N Check that J1101 is properly soldered. Y Return the phone to the factory Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 45 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis 9.4.5 Keys and Buttons The Y210 has six keys and buttons, three of which are the Menu, Home and Back keys on the touch panel. The MSM7225A's GPIO_42 and GPIO_41 pins are connected to the volume up and down buttons. The side key FPC is connected to the PCBA via the ZIF connector J1605. The power button press is detected by the PM8029's KYPD_PWR_N pin. The power button FPC is connected to the PCBA using press-fit contacts. Figure 9-20 Key and button circuit Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 46 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis Troubleshooting Key or Button Failure Figure 9-21 Key or button failure Key or button failure N Is the keypad on the FPC in good contact with the dome sheet? Clean the keypad and the dome sheet Y N Are the FPC and ZIF connector connected properly? Re-connect them Y Return the phone to the factory 9.4.6 Tricolor Indicator and Touch Key Backlight Circuits The Y210's battery charging indicator (tricolor indicator) provides red, green and blue light sources that are driven by the PM8029's three LED driver. Table 9-12 Light source and driver pins Light Source Driver Pin (PM8029) Remarks Red LED_RED_DRV_N (MPP3) Adjusted using electric current Green LED_GREEN_DRV_N (MPP5) Adjusted using electric current Blue LED_BLUE_DRV_N (MPP8) Adjusted using electric current Figure 9-22 Status indicator circuit Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 47 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis The KYPD_DRV_N (PM8029) is used to adjust the brightness of the keypad's backlight, and VPH_PWR is used to supply power to the backlight LEDs. The keypad backlight is provided by two white LEDs. The light from the LEDs is transmitted to the key area using a light guide film. Table 9-13 Keypad backlight driver Keypad Backlight Driver VPH_PWR Power supply Backlight power supply KPD_DRV_N Backlight driver pin When this pin's voltage is at a low level, the two backlight LEDs turn on. Figure 9-23 Touch key backlight circuit 9.4.7 Battery Connector Figure 9-24 Battery connector circuit Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 48 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis 9.4.8 Accelerometer Figure 9-25 Accelerometer circuit Table 9-14 Accelerometer pins Component Pin Network MSM7225A Pin Description SCL I2C1_SCL GPIO_131 I2C bus SDA I2C1_SDA GPIO_132 INT1 MEMS_INT1 GPIO_28 Accelerometer interrupt signal INT2 MEMS_INT2 GPIO_111 Accelerometer interrupt signal (sleep) Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 49 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis 9.4.9 Compass Figure 9-26 Compass circuit Table 9-15 Compass pins Component Pin Network MSM7225A Pin Description SCL I2C1_SCL GPIO_131 I2C bus SDA I2C1_SDA GPIO_132 DRDY COMPASS_INT GPIO_18 Compass interrupt signal 9.4.10 Proximity Sensor The Y210 uses a 3-in-1 light, proximity and infrared sensor. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 50 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis Figure 9-27 Sensor circuit Table 9-16 Sensor pins Component Pin Network MSM7225A-0 Pin Description SCL I2C1_SCL GPIO_131 I2C bus SDA I2C1_SDA GPIO_132 INT PRO_INT GPIO_17 3-in-1 interrupt signal Functions Detect the intensity of environmental light. Detect the proximity of objects. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 51 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis Figure 9-28 Sensor failure The phone's display does not turn off when near the user's ear during a call (The phone is in portrait orientation; no headset is connected; handsfree mode is disabled.) Y Is the touch panel's light sensor hole dirty or blocked? Clean the hole N Y Re-install the phone's firmware. Is the problem solved? End N Y Is U1207 poorly soldered or dirty? Re-solder, clean or replace U1207 N Return the phone to the factory 9.4.11 Vibration Motor Figure 9-29 Vibration motor circuit The vibration motor's driving voltage is controlled by PM VIB_DRV_N. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 52 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis Troubleshooting Vibration Failure Figure 9-30 Vibration failure Vibration failure Y Re-install the phone's firmware. Is the problem solved? End N Y Replace the motor. Is the problem solved? End N Y Is the voltage on VIB_DRV_N equal to the battery voltage? Replace D902 N Return the phone to the factory 9.4.12 Receiver The receiver receives differential earphone output from the MSM chip. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 53 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis Figure 9-31 Receiver circuit The MSM chip's EARI output signal is connected to the receiver. D1503 and D1504 are the ESD protection components on the receiver. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 54 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis Troubleshooting the Failure that No Sound Can Be Heard During a Call Figure 9-32 No sound during a call No sound is heard during a call N Is the in-call volume set to a normal level? End Y Y Does the phone mistakenly detect the insertion of a headset? Replace the headset connector N Y Replace the receiver. Is the problem solved? End N Return the phone to the f actory Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 55 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis 9.4.13 Microphone Figure 9-33 Microphone circuit Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 56 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis Troubleshooting the Failure that No Sound Can Be Heard by the Other Party During a Call Figure 9-34 No sound heard by the other party during a call No sound can be heard by the other party during a call Y Re-install the phone's firmware. Is the problem solved? End N N Is the MIC_BIAS voltage equal to 1.8 V? Check U201 Y Y Replace the microphone. Is the problem solved? End N Return the phone to the factory 9.4.14 Touch Panel Figure 9-35 Touch panel circuit The Y210's 3.5-inch capacitive touch panel has a touch key area containing three touch keys. The backlight LEDs for the three touch keys are located on the PCBA. A light guide film is Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 57 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis used to guide light from the LEDs to the touch key area. Table 9-17 describes the interfaces between the touch panel, MSM7225A, and PM8029. Table 9-17 Interfaces between touch panel, MSM7225A, and PM8029 Touch Panel Interface Pin Description VDD_2V8_TP VREG_L12_2P85 (PM8029) Touch panel analog power supply, 2.85 V VREG_S3 VREG_S3 (PM8029) Touch panel digital power supply and I/O connector power supply, 1.8 V TOUCH_INT GPIO_82 (MSM7225A) Touch panel interrupt signal I2C1_SCL GPIO_131 (MSM7225A) Touch panel's I2C clock I2C1_SDA GPIO_132 (MSM7225A) Touch panel's I2C data TOUCH_RST_N GPIO_96 (MSM7225A) Touch panel reset signal 9.4.15 SIM Card The MSM7225A is not compatible with the SIM card interface. The PM8029's MPP pins are used to convert voltage levels of the signals for communication between the MSM7225A and the SIM card. The voltage of VREG_L16_UIM1 can be set to 1.5–3.05 V. The USIM interface's operating voltage is usually 1.8 V or 3.0 V. Table 9-18 describes the voltage level conversion interface of the PM8029. Table 9-18 Voltage level conversion interface of the PM8029 Signal for Interfacing with the MSM Voltage Level Signal for Interfacing with the USIM Card Voltage Level - VREG_S3 UIM1_RESET VREG_L16_UIM1 UIM1_MSM_CLK UIM1_CLK (configured by the phone's firmware) UIM1_MSM_DATA UIM1_DATA Considering that SIM card operations are frequent, transient-voltage-suppression (TVS) diodes are added to the circuit to provide ESD and surge protection. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 58 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis Table 9-19 USIM card circuit 9.4.16 microSD Card The microSD card connector's SD_DETECT pin is used to detect the insertion of a microSD card. When a microSD card is inserted, the pin is grounded and its voltage is at a low level. When no microSD is inserted, its voltage is at a high level. The U1402 is an electromagnetic interference (EMI) and ESD protection component for the microSD card. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 59 Y210 Mobile Phone Maintenance Manual 9 Principles and Failure Analysis Figure 9-36 microSD card circuit Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 60 Y210 Mobile Phone Maintenance Manual 10 Solder Points on the PCBA and BGA Chip 10 Solder Points on the PCBA and BGA Chip Red (R: 255, G: 0, B: 0) Green (R: 0, G: 255, B: 0) Blue (R: 0, G: 0, B: 255) : Vacant point : Ground point : Solder point Figure 10-1, Figure 10-2, Figure 10-3, and Figure 10-4 show magnified views of sections. Figure 10-5 shows the complete PCB view. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 61 Y210 Mobile Phone Maintenance Manual 10 Solder Points on the PCBA and BGA Chip Figure 10-1 PM section Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 62 Y210 Mobile Phone Maintenance Manual 10 Solder Points on the PCBA and BGA Chip Figure 10-2 MSM7225A+NAND MCP section Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 63 Y210 Mobile Phone Maintenance Manual 10 Solder Points on the PCBA and BGA Chip Figure 10-3 Wi-Fi/Bluetooth/FM section Figure 10-4 RTR8285A section Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 64 Y210 Mobile Phone Maintenance Manual 10 Solder Points on the PCBA and BGA Chip Figure 10-5 Complete PCB view Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 65 Y210 Mobile Phone Maintenance Manual Issue 1.0 (2012-11-28) 10 Solder Points on the PCBA and BGA Chip Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 66 Y210 Mobile Phone Maintenance Manual 11 Functional Tests 11 Functional Tests 11.1 MMI Test On the home screen, enter *#*#2846579#*#* to enter MMI test mode. Press the volume down button to start a test. Touch the Menu key on the touch panel to skip the current test and go to the next step. Touch the Back key to return to the previous test. NOTE When no battery is installed or the battery voltage is low, the phone will prompt that the battery is low and MMI test cannot be started. During a test, if you touch the Menu key on the touch panel, the test will be skipped and marked as a failed test. Table 11-1 MMI test No. Category Item Test Method 1 microSD card test microSD card test Automatically test the microSD card functions. If a microSD card is found and is available, the test passes; otherwise, the test fails. If this test passes, the next test automatically starts. 2 SIM card test SIM card test Automatically test whether the SIM card can be recognized. If the SIM card cannot be recognized, a message will be displayed, indicating that this test fails. If this test passes, the next test automatically starts. 3 Battery test Battery test Automatically test whether the battery is in place and whether its power is sufficient. If this test fails, a message will be displayed. If this test passes, the next test automatically starts. 4 Keypad test Keys Touch or press all the keys and buttons. When a key or button is touched or pressed, the color of the corresponding key displayed on the screen will change (from white to blue, or from blue to white). Press the volume down button to start the next test. 5 LCD test White screen The LCD displays a white screen. Press the volume down button to start the next test. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 67 Y210 Mobile Phone Maintenance Manual No. Category 11 Functional Tests Item Test Method Black screen The LCD displays a black screen. Press the volume down button to start the next test. Red and blue bars The LCD displays red and blue bars. Press the volume down button to start the next test. 6 LCD backlight test LCD backlight and tricolor status indicator If the LCD backlight repeatedly turns on and off, the LCD backlight is normal. The status indicator is normal if its color repeatedly changes in the sequence of red, green and blue. Press the volume down button to start the next test. 7 Keypad backlight test Keypad backlight LEDs If the keypad backlight repeatedly turns on and off, the backlight LEDs are normal. Press the volume down button to start the next test. 8 Camera test Camera test Automatically test the camera. The phone's camera is turned on, and the LCD displays the preview. Check the image quality visually and test the camera's response speed to determine the camera's performance. Press the volume down button to start the next test. 9 Touch panel test Touch panel Place your finger on the touch panel, and slide your finger along the touch panel edges. The areas near the route that your finger passes should turn red. Press the volume down button to start the next test. 10 11 12 Proximity test Environmental light test Vibration test Proximity and light sensor's proximity detection function Place the light shielding plate approximately 4 mm above the light hole. If the portrait icon changes to an in-call icon, the function is normal. Proximity and light sensor's function to sense environmental light Check whether the environmental light sensing data is detected: Use your hand to block the light hole, the light sensing number will decrease to approximately 10 if the light sensor functions properly. Vibration motor The motor will vibrate intermittently. If this test passes, the next test automatically starts. If this test passes, the next test automatically starts. Check whether the vibration (including the vibration sound) is normal. Press the volume down button to start the next test. 13 Speaker test Speaker test Automatically test the speaker. (Do not insert the headset.) If the speaker emits sound during the test, it is normal. Press the volume down button to start the next test. 14 Main microphone loopback test Main microphone (located near the USB port) Do not insert the headset. Touch the Record button. Speak to the main microphone, and then touch the Play button. If the main microphone is normal, you can hear the voice recording from the receiver. Press the volume down button to start the next test. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 68 Y210 Mobile Phone Maintenance Manual 11 Functional Tests No. Category Item Test Method 15 Secondary microphone loopback test Secondary microphone (located above the camera at the phone's rear) Do not insert the headset. Touch the Record button. Speak to the secondary microphone, and then touch the Play button. If the secondary microphone is normal, you can hear the voice recording from the receiver. Main and secondary microphones Do not insert the headset. Touch the Record button. Speak to the phone as you do during a call, and then touch the Play button. If the main and secondary microphones are normal, you can hear the voice recording from the receiver. 16 Dual microphone loopback test Press the volume down button to start the next test. Press the volume down button to start the next test. 17 Headset loopback test Insert the headset. Touch the Record button. Speak to the headset microphone, and then touch the Play button. If the headset is normal, you can hear the voice recording from the headset's earphones. Headset Keep the headset inserted. Press the volume down button to start the next test. 18 FM test The testing software will detect whether a headset is inserted. If no headset is inserted, a message requesting a headset to be inserted will be displayed. After a headset is inserted, the phone will search for and play an FM channel. Three frequencies (88 MHz, 98 MHz and 107 MHz) will be tested. The 88 MHZ frequency will be tested first. To test the next frequency, touch Next. FM test Remove the headset. Press the volume down button to start the next test. 19 Headset button test Headset button test Insert the headset. The IN icon will turn green. Press the headset button, the round dot will become smaller. Remove the headset, the OUT icon will turn green. Press the volume down button to start the next test. 20 Bluetooth test Bluetooth test Automatically test the Bluetooth functions. During the test, the phone will search for nearby Bluetooth devices, and display the MAC addresses of the Bluetooth devices that have been found. (Note: This test requires another device with Bluetooth enabled.) Press the volume down button to start the next test. 21 Tilt-sensor test Accelerometer The LCD displays the current acceleration in the X, Y and Z axes. Place the phone in a position where the angles between the X, Y and Z axes are 45°. If the acceleration in the X, Y and Z axes is equal to each other, the phone passes this test. If this test passes, the next test automatically starts. 22 Compass test Compass If this test passes, the next test automatically starts. If this test fails, a message will appear, indicating the failure. 23 Wi-Fi test Wi-Fi test Automatically test the Wi-Fi functions. During the test, the phone will search for nearby hotspots, and Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 69 Y210 Mobile Phone Maintenance Manual No. 11 Functional Tests Category Item Test Method display the MAC addresses of the hotspots that have been found. (Note: This test requires an active hotspot in the testing environment.) Press the volume down button to start the next test. 24 Displaying test results Displaying test results Display the MMI test results. Failed test items will be listed. 11.2 Voice Call Test To test the voice call function, perform the following steps: Step 1 Install a UIM card and battery on the phone. Step 2 Press the power button to power the phone on. Step 3 Check whether the signal strength displayed on the LCD is normal (given that the network is normal). Step 4 Make a call to a fixed-line phone, and check the voice quality during the call. If no problems are found, finish the voice call test. If any problems are found, troubleshoot the phone or send it to an advanced service site for repair. ----End Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 70
Source Exif Data:
File Type : PDF File Type Extension : pdf MIME Type : application/pdf PDF Version : 1.5 Linearized : No Page Count : 75 Language : zh-CN Title : Release Notes Author : Wuguoyan KF25758 Creator : Microsoft® Office Word 2007 Create Date : 2012:12:12 17:57:53 Modify Date : 2012:12:12 17:57:53 Producer : Microsoft® Office Word 2007EXIF Metadata provided by EXIF.tools