Huawei Ascend Maintenance Manual
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Huawei Ascend Maintenance Manual

Huawei Ascend Maintenance Manual

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Y210 Mobile Phone

Maintenance Manual

Issue
1.0
Date
2012-11-28
HUAWEI TECHNOLOGIES CO., LTD.

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Summary of Contents for Huawei Ascend

  • Page 1: Maintenance Manual

    Y210 Mobile Phone Maintenance Manual Issue Date 2012-11-28 HUAWEI TECHNOLOGIES CO., LTD.
  • Page 2 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"...

  • Page 3: About This Document

    About This Document Author Prepared by Date R&D Reviewed by Date Maintenance support team Approved by Date Service representative Change History Date Version Change Reason Section Description Author Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 4: Table Of Contents

    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.
  • Page 5 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.

  • Page 6: Product Overview

    Y210 Mobile Phone Maintenance Manual 1 Product Overview 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.

  • Page 7: Features

     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), Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 8 ≤ –104 dBm Static sensitivity Operating temperature: –10° C to +55° C Temperature  Storage temperature: –40° C to +70° C  Humidity Operating humidity: 5% to 95% RH Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 9: 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.

  • Page 10: 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 Description Quantity Touch panel Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 11 Receiver insulation film Printed circuit board assembly (PCBA) Volume button FPC assembly Motor Speaker Main antenna support assembly Camera support foam Camera Rear cover assembly Battery Screws Battery cover Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 12: Components On The Pcba

    Speaker malfunctions Network registration failure U3401 power module, PA U4202 power module, PA Faults caused if damaged: Faults caused if damaged: RF transmit error RF transmit error Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 13 Power button malfunctions D1602 D1603 D1604 power MIC1501 microphone button LED Faults caused if damaged: Faults caused if damaged: No sounds for recordings Functional keys backlight off Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 14: Software Upgrade

    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.
  • Page 15 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.

  • Page 16: Maintenance Tools

    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.
  • Page 17 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.

  • Page 18: Disassembly Procedure

    3. Remove the battery cover: Press the upper part of 4. Remove the battery. the battery cover and push it towards the bottom. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 19 8. Use a cover opener to release the latches between upper left corner. the rear cover and the front cover. 9. Remove the volume key. 10. Release the volume key FPC. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 20 LCD. 13. Remove the PCBA. 14. Release the BTB connector, and remove the camera. 16. Apply a protective film on the LCD. 15. Remove the LCD. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 21 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.

  • Page 22: 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. 4. Install the speaker. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 23 10. Gently press the PCBA to close the latches and PCBA is in good contact with the front cover at the secure the PCBA. power button position. Snap the latches in place. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 24 13. Install the rear cover: Snap the rear cover's bottom, and press its top. 15. Install the battery: Insert it into the battery 16. Install the battery cover. compartment bottom first. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 25 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.

  • Page 26: Principles And Failure Analysis

    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.

  • Page 27: Functions Of The Pcba

    Provides camera, pulse code User interface processing unit modulation (PCM), broadband codec, vocoder, RF, HKADC, LCD, microSD card, USB, UART, USIM card, southbound interface (SBI), GPIO, JTAG/ETM, and keypad Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 28 19.2 MHz local synthesizer 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.
  • Page 29 Driver mode, connection mode, Emits sound during a call. receiver component Microphone Interface circuit, connection The phone has two built-in mode, microphone component microphones to eliminate the Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 30 Mainly controls the low-dropout management (power-on/off (LDO) regulator power supply to analysis) 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.

  • Page 31: Baseband Unit

    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.
  • Page 32 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.
  • Page 33 Figure 9-2 No current Power-on failure: no current Is the battery connector J902 Replace J902 normal? Replace Q201 Is Q201 normal? Re-solder or replace U201  Weak current Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 34 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.

  • Page 35: Charging Management Circuits

    J902. Replace Q201. Is Q201 normal? Remove U201. Do short Replace U201. circuits still exist? 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.

  • Page 36: Rf Unit

    Q201' pin 2 and pin 3? Replace the Is the battery damaged? battery 9.3 RF Unit 9.3.1 RF Failure Troubleshooting Transmission Failure  GSM/DCS transmission failure Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 37 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 Table 9-4 U3501 working status (2) GSM_PA_BAND Mode GSM850/900 DCS1800/1900 Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 38 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.
  • Page 39 U3302's pin 2 and Check U3302 pin 9 approximately 0.6 dB? Check U3301 Is U3301's output 24 dB? Does U3801's pin A7 have Check U3801 output? Check U401 Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 40: Gps

    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.
  • Page 41 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.

  • Page 42: Peripheral Circuits

    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.
  • Page 43 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.
  • Page 44 Cathode of the backlight LED LED_K Cathode of the backlight LED Brightness control signals from the PWM_OU Reserved Brightness control signals from the LCD_BL_ GPIO1 (PM8029) phone's main chip Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 45: 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.
  • Page 46 I2C control signal I2C0_SDA GPIO_061 (MSM7225A) I2C_SDA MCAMIF_RESET GPIO_049 (MSM7225A) Reset Reset signal MCAMIF_ID GPIO_9 (MSM7225A) 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.
  • Page 47 Is J1001 poorly soldered or Re-solder or replace are its contacts defective? J1001 Replace the camera. Is the problem solved? Return the phone to the factory Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 48: Usb

    Is the 5-pin mini USB Re-solder the USB connector poorly soldered? connector Re-install the phone's firmware. Is the problem solved? Return the phone to the factory Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 49: Headset Jack

    The Y210 supports only the LRGM headsets and does not support LRMG headsets. Figure 9-17 Headset jack circuit  No sound comes from the headset during a call. Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 50 Is the problem solved? Insert the headset. Is the voltage on J1101's pin 4 at Check that J1101 is a low level? properly soldered. Return the phone to the factory Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 51: Keys And Buttons

    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.

  • Page 52: Tricolor Indicator And Touch Key Backlight Circuits

    Driver Pin (PM8029) Remarks 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.

  • Page 53: Battery Connector

    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.

  • Page 54: Accelerometer

    Table 9-14 Accelerometer pins Component Network MSM7225A Description I2C1_SCL GPIO_131 I2C bus 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.

  • Page 55: Compass

    MSM7225A Pin Description I2C1_SCL GPIO_131 I2C bus 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.
  • Page 56 MSM7225A-0 Pin Description I2C1_SCL GPIO_131 I2C bus I2C1_SDA GPIO_132 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.

  • Page 57: Vibration Motor

    U1207 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.

  • Page 58: Receiver

    Is the voltage on VIB_DRV_N equal to Replace D902 the battery voltage? 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.
  • Page 59 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.
  • Page 60 Does the phone mistakenly Replace the detect the insertion of a headset connector headset? Replace the receiver. Is the problem solved? Return the phone to the f actory Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 61: Microphone

    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.

  • Page 62: During A Call

    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.

  • Page 63: Sim Card

    UIM1_MSM_CLK UIM1_CLK 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.

  • Page 64: Microsd Card

    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.
  • Page 65 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.

  • Page 66: Solder Points On The Pcba And Bga Chip

    Blue (R: 0, G: 0, B: 255) : 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.
  • Page 67 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.
  • Page 68 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.
  • Page 69 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.
  • Page 70 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.
  • Page 71 Y210 Mobile Phone Maintenance Manual 10 Solder Points on the PCBA and BGA Chip Issue 1.0 (2012-11-28) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

  • Page 72: Functional Tests

    Press the volume down button to start the next test. 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.
  • Page 73 Play button. If the main loopback test USB port) 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.
  • Page 74 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.

  • Page 75: Voice Call Test

    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.

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