Huawei U8500 Maintenance Manual
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Huawei U8500 Maintenance Manual

Maintenance manual basic version
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U8500 Maintenance Manual Basic Version
Prepared by
Reviewed by
Approved by
V1.1
Product Department
Documentation Team
Huawei Technologies Co., Ltd.
All rights reserved
Date
2010-12-21
Date
Date

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Summary of Contents for Huawei U8500

  • Page 1 U8500 Maintenance Manual Basic Version V1.1 Product Department Prepared by Date 2010-12-21 Documentation Team Reviewed by Date Approved by Date Huawei Technologies Co., Ltd. All rights reserved...
  • Page 2 U8500 Maintenance Manual Basic Version V1.1 Internal Revision record Date Revision Revision Section Change Author Version Cause Number Description Product Department Documentation 2010-7-30 V1.0 Team Product Department Documentation 2010-12-21 V1.1 Team 2010-12-21 Huawei confidential. No spreading without permission. Page 2 of 62...

  • Page 3: Table Of Contents

    U8500 Maintenance Manual Basic Version V1.1 Internal Contents 1 PRODUCT INTRODUCTION ..........................5 1.1 P ............................5 RODUCT PPEARANCE 1.2 P ........................... 5 RODUCT PECIFICATIONS 2 MAINTENANCE INFORMATION GUIDE ....................... 7 2.1 D ............................ 7 OCUMENT PPLICATION 2.2 M ..........................7...
  • Page 4 U8500 Maintenance Manual Basic Version V1.1 Internal 10.1 K ..........................60 EYPAD NTRODUCTION 10.2 T ..............................60 OMMAND 10.3 MMI T ................................61 10.4 V ............................. 62 OICE 2010-12-21 Huawei confidential. No spreading without permission. Page 4 of 62...

  • Page 5: Product Introduction

    U8500 Maintenance Manual Basic Version V1.1 Internal Product Introduction 1.1 Product Appearance 1.2 Product Specifications Items Content Description Phone type Touch screen smart phone Dimensions 111.5mm × 57.9mm × 12.8mm Weight <110g Technical standard WCDMA/GSM WCDMA 850MHz 824MHz~849MHz/869MHz~894 MHz(Uplink /Downlink) WCDMA 2100MHz;...
  • Page 6 U8500 Maintenance Manual Basic Version V1.1 Internal Items Content Description USB interface: USB 2.0 High speed External interface Extended card interface: Micro SD 6pin USIM card connector Battery 1150 mAh Li-Battery; Input：AC 100V to 240V 50/60Hz 0.2A MAX Output：DC 5V， 400Ma...

  • Page 7: Maintenance Information Guide

    Maintenance Information Guide 2.1 Document Application This document provides instructions for maintenance of Huawei products. This manual is Huawei proprietary and is only permitted to be used by authorized service partners. Shall there be any mistakes found in this document, kindly contact our customer service personnel.

  • Page 8: Explosive View Of Product

    U8500 Maintenance Manual Basic Version V1.1 Internal Explosive View of Product 10 11 13 14 Explosive view BOM list. Description Quantity A Cover Main_Key_Asm KEY_DOME keyboard 2010-12-21 Huawei confidential. No spreading without permission. Page 8 of 62...
  • Page 9 U8500 Maintenance Manual Basic Version V1.1 Internal Description Quantity Key_Support_ASM Main board Product_Nameplate Camera cover Power Key B cover Dome_vol battery Camera lens B cover decorating parts Battery cover 2010-12-21 Huawei confidential. No spreading without permission. Page 9 of 62...

  • Page 10: Location Of Components On The Main Board

    U8500 Maintenance Manual Basic Version V1.1 Internal Location of Components on the Main Board U1701 AUDIO Chip D1101 Diodes U4101 RF LNA U4102 SAW Filter Failure Symptom: Failure Symptom: Failure Symptom: -1575.42MHz NO audio, cacophony GPS function failure Failure Symptom: FM function failure GPS No signal.
  • Page 11 U8500 Maintenance Manual Basic Version V1.1 Internal J1102 Earphone Jack J1101 Micro_B Type Failure Symptom: Failure Symptom: Earphone no voice; Can’t charge FM failure. Can’t communicate with PC J1201 BTB Connector U201 Power Management Failure Symptom: LCD display failure Failure Symptom: Can’t power on...
  • Page 12 U8500 Maintenance Manual Basic Version V1.1 Internal C216 Q202 MOSFET-P Failure Symptom: Failure Symptom: Clock failure Can’t Charge U1201 DCDC Control MIC901 MIC Chip Failure Symptom: Failure Symptom: Transmitting voice failure Can’t Charge U1101 Headphone Audio U1403 semiconducting Power Amplifier...
  • Page 13 U8500 Maintenance Manual Basic Version V1.1 Internal U1201 DCDC Control Chip Failure Symptom: LED backlight failure X4601 Crystal 26MHz U4601 chip WiFi Failure Symptom: Failure Symptom: WiFi transmission failure WiFi transmission failure J1602 MICRO SD X4001 Crystal 32MHz Receptacle Failure Symptom:...
  • Page 14 U8500 Maintenance Manual Basic Version V1.1 Internal Components BOM List: Note: The following BOM information is subject to change without notice. It is for your reference only Name Location 14240180 BTB Connector-Male-24Pin 14240199 BTB Connector -female-10pin J2,J3 15020099 Lighting Diode...
  • Page 15 U8500 Maintenance Manual Basic Version V1.1 Internal Name Location 47090032 RF LNA-1.575GHZ U4101 13010180 SAW Filter -1575.42MHz U4102 12020125 Crystal-0.032768MHz X301 07040064 Varistor Z901 07040072 ESD_EMI Filter Z1601 15010251 Schottky Diode D1201 15040031 Zener D1202 15010248 Schottky Diode D1203 15040238 Transient Suppressing Diodes...

  • Page 16: Software Upgrade

    U8500 Maintenance Manual Basic Version V1.1 Internal Software Upgrade 5.1 Preparation for Upgrade Item Contents Remark Battery The battery level shall be no less than two bars. Micro SD card 512M at most Upgrade Environment For copy upgrade file The Version is only for your information. Please...
  • Page 17 U8500 Maintenance Manual Basic Version V1.1 Internal 2010-12-21 Huawei confidential. No spreading without permission. Page 17 of 62...
  • Page 18 U8500 Maintenance Manual Basic Version V1.1 Internal 5. Start upgrade the programs. 2010-12-21 Huawei confidential. No spreading without permission. Page 18 of 62...
  • Page 19 U8500 Maintenance Manual Basic Version V1.1 Internal 6. The handset will auto restart after complete upgrade. 2010-12-21 Huawei confidential. No spreading without permission. Page 19 of 62...

  • Page 20: Force Download

    U8500 Maintenance Manual Basic Version V1.1 Internal 5.3 Force Download 1. Format micro SD card or delete its content. 2. Create a folder and named as “dload”, copy “UPDATA.APP” into it. 3. Power off handset , Insert micro SD card.
  • Page 21 U8500 Maintenance Manual Basic Version V1.1 Internal 2010-12-21 Huawei confidential. No spreading without permission. Page 21 of 62...

  • Page 22: Error Handling

    U8500 Maintenance Manual Basic Version V1.1 Internal 5.5 Error Handling Error 1 During SD card upgrade, the key pad led flash very frequently (two flashes per second), and the progress bar stop, that means an error occurs. Check whether there is a miss-operation. You can change another phone or SD card to do the test.

  • Page 23: Maintenance Tools

    U8500 Maintenance Manual Basic Version V1.1 Internal Maintenance Tools Name: Constant-temperature Hot Air Gun Purpose: Heat component. Name: Soldering Iron Purpose : Repair soldering Name: DC Power Supply Purpose: Supply voltage and current. Name: Soldering Station Purpose: Fix main board.
  • Page 24 U8500 Maintenance Manual Basic Version V1.1 Internal Name: Tool kit Purpose : Assemble and Disassemble tool Name: Electronic Screw Driver Purpose : Assemble and Disassemble tool 2010-12-21 Huawei confidential. No spreading without permission. Page 24 of 62...

  • Page 25: Disassembly Procedure

    U8500 Maintenance Manual Basic Version V1.1 Internal Disassembly Procedure 1. Make sure the ESD antistatic wrist strap connect to 2. Disassembly process of U8500. the ground is normal. 3. Remove the Battery cover. 4. Remove the Battery. 2010-12-21 Huawei confidential. No spreading without permission.
  • Page 26 U8500 Maintenance Manual Basic Version V1.1 Internal 5. Loosen all clips between the B cover decorating 6. Unscrew the screws. parts., Remove the B cover decorating parts. 7. Loosen all clips between the A Cover and the B 8. Loosen all clips between the A Cover and the B Cover.
  • Page 27 U8500 Maintenance Manual Basic Version V1.1 Internal 11. Remove the speaker. 12. Loosen the power key board. 13. Loosen the Ectypal Board. 14. Apart the Ectypal Board. 15. Loosen the Ectypal Board connector. 16. Loosen the LCD connector. 2010-12-21 Huawei confidential. No spreading without permission.
  • Page 28 U8500 Maintenance Manual Basic Version V1.1 Internal 17. Loosen the motor. 18. Loosen the keypad connector. 19. Loosen the main board. 20. Remove the main board. 21. Loosen the Touch Lens connector. 22. Remove the Key Support ASM. 2010-12-21 Huawei confidential. No spreading without permission.
  • Page 29 U8500 Maintenance Manual Basic Version V1.1 Internal 23. Loosen the OFN connector. 24. Remove the OFN. 25. Use soldering iron to remove the motor. 26. Remove the main key ASM. 27. Remove the LCD. 28. Protect the LCD with film.
  • Page 30 U8500 Maintenance Manual Basic Version V1.1 Internal 29. Protect the LCD lens with film. 30. Remove the Receiver. 31. The disassembly procedure is completed. 2010-12-21 Huawei confidential. No spreading without permission. Page 30 of 62...

  • Page 31: Assembly Procedure

    U8500 Maintenance Manual Basic Version V1.1 Internal Assembly Procedure 1. Make sure the ESD antistatic wrist strap connect to 2. Assembly process is as follow. the ground is normal. 3. Install the Receiver. 4. Remove the protective film from lens.
  • Page 32 U8500 Maintenance Manual Basic Version V1.1 Internal 5. Remove the protective film from LCD. 6. Install the LCD. 7. Install the main key ASM. 8. Use soldering iron to install the motor. 9. Install the OFN. 10. Press the OFN connector.
  • Page 33 U8500 Maintenance Manual Basic Version V1.1 Internal 11. Install the Key Support ASM. 12. Press the Touch Lens connector. 13. Install the main board. 14. Press the keypad connector. 15. Fix the motor. 16. Press the LCD connector. 2010-12-21 Huawei confidential. No spreading without permission.
  • Page 34 U8500 Maintenance Manual Basic Version V1.1 Internal 17. Press the Ectypal Board connector. 18. Fix the Ectypal Board. 19. Fix the power key board. 20. Install the speaker. 21. Install the camera cover. 22. Install the power key. 2010-12-21 Huawei confidential. No spreading without permission.
  • Page 35 U8500 Maintenance Manual Basic Version V1.1 Internal 23. Install the B cover. 24. Press the B cover. 25. Install the screws. 26. Press the B cover decorating parts. 27. Install the battery. 28. Install the battery cover. 2010-12-21 Huawei confidential. No spreading without permission.
  • Page 36 U8500 Maintenance Manual Basic Version V1.1 Internal 29. The assembly is completed. 2010-12-21 Huawei confidential. No spreading without permission. Page 36 of 62...

  • Page 37: Trouble Shootings Of Common Faults

    The main chip of system is MSM7225. Include three function modules, baseband interface management module MSM7225, power management module pm7540, RF IC RTR6285 According to functions, U8500 can be divided into the baseband processing module (including CPU-U401 and Flash-U601), power module (U201), RF transmitting module (U3801) and peripheral circuit.
  • Page 38 U8500 Maintenance Manual Basic Version V1.1 Internal High current Measure J1101 pin1 whether is short？ Remove U1201. Then inspect Replace the if it is not short? U1201 Remove U3302/ Replace the U3401/U3501.Then inspect if it is U3302/U3401/U35 not short? Replace the U201...
  • Page 39 U8500 Maintenance Manual Basic Version V1.1 Internal VPH_PWR L1702 F1101 VCHG U201 U3801 U401 U601 VCHG≈5V VBAT≈3.7V-4.2V VREG_USB C255 VPH_PWR≈3.4V-4.2V VREG_USB≈3.3V U3401 U3302 VBAT Picture 9-1 2010-12-21 Huawei confidential. No spreading without permission. Page 39 of 62...

  • Page 40: Low Current (Dc Power Supply)

    U8500 Maintenance Manual Basic Version V1.1 Internal 9.2.2 Low Current (DC power supply) Low Current Download the software. Then inspect if the U8500 is OK? Measure if the output voltage of the U201 is normal? Replace the VREG_RFRX: 2.1V U3801 VREG_RFRX2: 2.7V...
  • Page 41 U8500 Maintenance Manual Basic Version V1.1 Internal C241 VREG_MSMP C242 VREG_MSMA C247 VREG_TOUCH_OFN C235 VREG_GPS_LNA C239 VREG_TCXO C252 VREG_CAMERA_VCM_AVDD C246 VREG_CAMERA_CORE C234 VREG_RUIM C230 VREG_MSME C236 VREG_RFTX C226 VREG_MSMC1 U201 C228 VREG_MSMC2 C238 VREG_RFTX2 C248 VREG_CAMERA_IOVDD C224 VREG_PA C268 VREG_TF_CARD...

  • Page 42: Can't Charge

    U8500 Maintenance Manual Basic Version V1.1 Internal 9.3 Can’t Charge Analyzing：The IO Connector damaged causes the failure usually. 2010-12-21 Huawei confidential. No spreading without permission. Page 42 of 62...

  • Page 43: Keyboard Malfunction

    Measure if the voltage of VBAT is 3.7V-4.2V? Q202 Replace the U401 Refer to Picture 9-2 9.4 Keyboard Malfunction Analyzing： U8500 Keyboard faulty is often caused by smudginess of the DOME, clear it. 2010-12-21 Huawei confidential. No spreading without permission. Page 43 of 62...

  • Page 44: Display Malfunction

    9.5 Display Malfunction Analyzing： LCD can not display is often caused by LCD fault. U8500 display failures consist of major reasons, LCD and main board connect badness, before replace the LCD, it is strongly suggested that check whether the connection is normal.

  • Page 45: Audio Malfunction

    U8500 Maintenance Manual Basic Version V1.1 Internal Display malfunction Inspect whether the J1201 Replace the interface is dirty, or damaged? J1201 Replace the LCD. And theninspect whether the phone is OK? Replace the U401 9.6 Audio Malfunction 9.6.1 No Ring Tone Analyzing: Before replace or repair component, please reset the function or reset factory.

  • Page 46: Voice Transmitting Failure

    U8500 Maintenance Manual Basic Version V1.1 Internal D902 D901 L902 L903 Picture 9-3 9.6.2 Voice Transmitting Failure Voice Transmitting failure Test whether the impedance of Replace the MIC is about 890Ω？ Test whether Z901/C901 are Replace bad one normal? Replace the U401...

  • Page 47: Receiver Failure

    U8500 Maintenance Manual Basic Version V1.1 Internal C901 Z901 Picture 9-4 9.6.3 Receiver Failure Receiver failure Test whether the impedance of Replace the receiver is about 30Ω？ receiver Test whether D903/D904 are Replace bad one normal? Replace the U401 Refer to Picture 9-5...

  • Page 48: Earphone No Voice

    U8500 Maintenance Manual Basic Version V1.1 Internal 9.6.4 Earphone No Voice Earphone no voice Replace the Check whether J1102 is normal? J1102 Test whether LB1101/LB1102 Replace bad one are normal? Replace the U1101. Then detect if it is OK? Refer to Picture 9-6...

  • Page 49: Earphone Can't Transmit Voice

    U8500 Maintenance Manual Basic Version V1.1 Internal 9.6.5 Earphone Can’t Transmit Voice Earphone can’t transmit voice Replace the Check whether J1102 is normal? J1102 Test whether LB1103 Replace the are normal? LB1103 Replace the U401 Refer to Picture 9-6 9.7 SIM Card Failure Analyzing: Before replace or repair the parts, please reset the function or reset factory.

  • Page 50: Sd Card Failure

    U8500 Maintenance Manual Basic Version V1.1 Internal 9.8 SD Card Failure SD card failure Check whether socket is in good Re-solder/ replace socket condition soldering？ Replace the Check whether J1401 is normal? J1401 Replace the U401 9.9 Vibration Failure Vibration failure Supply voltage (3.7V) to Motor,...

  • Page 51: Camera Failure

    U8500 Maintenance Manual Basic Version V1.1 Internal 9.10 Camera Failure Camera failure Update the software. Then inspect if the data card is OK? Replace Camera whether it is Replace the U401 2010-12-21 Huawei confidential. No spreading without permission. Page 51 of 62...

  • Page 52: Gps Failure

    U8500 Maintenance Manual Basic Version V1.1 Internal 9.11 GPS Failure GPS Failure Replace the Inspect if the antenna is OK? antenna Replace U4102. Then inspect if it is OK? Replace U4101. Then inspect if it is OK? Replace U3801. Then...

  • Page 53: Wifi Failure

    U8500 Maintenance Manual Basic Version V1.1 Internal 9.12 WIFI Failure WIFI Failure Replace the Inspect if the antenna is OK? antenna Replace the Check whether U4605 is normal? U4605 Replace U4604. Then inspect if it is OK? Replace X4601. Then inspect if it is OK? Replace U4601.

  • Page 54: Rf Failure

    U8500 Maintenance Manual Basic Version V1.1 Internal 9.13 RF Failure 9.13.1 WCDMA 2100MHz Signal Failure WCDMA 2100MHz No signal, weak signal Upgrade the software. Then inspect if it is OK? Replace the Inspect if the antenna is OK? antenna Replace U3304. Then inspect if it is OK? Replace U3202.
  • Page 55 U8500 Maintenance Manual Basic Version V1.1 Internal WCDMA 2100MHz can’t register the network Upgrade the software. Then inspect if it is OK? Replace the Inspect if the antenna is OK? antenna Replace U3302. Then inspect if it is OK? Replace U3301. Then inspect if it is OK? Replace U3304.

  • Page 56: Wcdma 850Mhz Signal Failure (Optional)

    U8500 Maintenance Manual Basic Version V1.1 Internal 9.13.2 WCDMA 850MHz Signal Failure (Optional) WCDMA 850MHz No signal, weak signal Upgrade the software. Then inspect if it is OK? Replace the Inspect if the antenna is OK? antenna Replace U3404. Then inspect if it is OK? Replace U3202.
  • Page 57 U8500 Maintenance Manual Basic Version V1.1 Internal WCDMA 850MHz can’t register the network Upgrade the software. Then inspect if it is OK? Replace the Inspect if the antenna is OK? antenna Replace U3402. Then inspect if it is OK? Replace U3401. Then inspect if it is OK? Replace U3404.

  • Page 58: Gsm Signal Failure

    U8500 Maintenance Manual Basic Version V1.1 Internal 9.13.3 GSM Signal Failure GSM No signal, weak signal Upgrade the software. Then inspect if it is OK? Replace the Inspect if the antenna is OK? antenna Replace U3202. Then inspect if it is OK? Replace U3801.
  • Page 59 U8500 Maintenance Manual Basic Version V1.1 Internal GSM can’t register the network Upgrade the software. Then inspect if it is OK? Replace the Inspect if the antenna is OK? antenna Replace U3501. Then inspect if it is OK? Replace U3502. Then inspect if it is OK? Replace U3202.

  • Page 60: Functional Test

    U8500 Maintenance Manual Basic Version V1.1 Internal Functional Test 10.1 Keypad Introduction Power key Volume up key Volume down key Optical Trackpad Backtrack key End key Menu key Answer key 10.2 Test Command Engineering test command Function description *#*#2846579#*#* Engineering mode 2010-12-21 Huawei confidential.

  • Page 61: Mmi Test

    U8500 Maintenance Manual Basic Version V1.1 Internal 10.3 MMI Test Enter *#*#2846579#*#*to access MMI Test_Ⅱ test mode. Item Step Content Test method and information Test Micro-SD, if there is Micro-SD insert in, the screen will SD card test SD card test show “SD card exist”, or it will show “...

  • Page 62: Voice Call Test

    U8500 Maintenance Manual Basic Version V1.1 Internal Item Step Content Test method and information The speak will play sound, and the sound will input into Speaker test Speaker test earphone if you plunge a headset, , press answer key to continue.

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