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Huawei Mediapad S7-PRO Maintenance Manual

Huawei Mediapad S7-PRO Maintenance Manual

Basic version v2.1
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S7-PRO Maintenance Manual (Basic Version V2.1)
INTERNAL
Mediapad Maintenance Manual (Basic Version V2.1)
Huawei Technologies Co., Ltd.
All Rights Reserved
2012-07-20
Huawei Proprietary and Confidential
Page 1 of 97
Copyright © Huawei Technologies Co., Ltd.

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Summary of Contents for Huawei Mediapad S7-PRO

  • Page 1 S7-PRO Maintenance Manual (Basic Version V2.1) INTERNAL Mediapad Maintenance Manual (Basic Version V2.1) Huawei Technologies Co., Ltd. All Rights Reserved 2012-07-20 Huawei Proprietary and Confidential Page 1 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 2: Table Of Contents

    8 Assembly Procedures ......................... 33 9 Troubleshooting for Common Failures .................. 37 9.1 Principle ................................. 37 9.2 Power-on Failure ............................40 9.2.1 Power-on Failure — High Current ......................47 2012-07-20 Huawei Proprietary and Confidential Page 2 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 3 10 Diagram of Soldered Connections on PCB and BGA Chip ..........82 11 Function Test ..........................82 11.1 MMI Test ..............................82 11.2 Voice Call Test .............................. 96 2012-07-20 Huawei Proprietary and Confidential Page 3 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 4: Product Introduction

    UMTS 1900 MHz/2100 MHz/AWS 1.3 Product Specifications Item Description Dimensions (H 190 mm x 124 mm x 10.5 mm x W x D) Weight About 390 g 2012-07-20 Huawei Proprietary and Confidential Page 4 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 5 Visual angles: upward 89° /downward 89° /leftward 89° /rightward 89° Colors: 16,000,000 colors Contrast: 800:1 Brightness: 400 cd/m (maximum) Touchscreen 7-inch captive touchscreen Camera Front camera: 1.3 megapixels, rear camera: 5 megapixels, autofocus 2012-07-20 Huawei Proprietary and Confidential Page 5 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 6: Maintenance Instructions

    This document provides instructions for the maintenance of Huawei products by technical personnel at service sites authorized by Huawei. This manual is Huawei proprietary and is only permitted to be used by authorized service sites or companies. Although every effort has been made to ensure the accuracy, mistakes may still be found.

  • Page 7: Exploded View Drawing

    Description Quantity Rear camera lens Cover B assembly POGO PIN Diversity antenna support Speaker Rear camera Headset connector Speaker FPC Main board Cover A assembly 2012-07-20 Huawei Proprietary and Confidential Page 7 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 8: Components On The Main Board

    2012-07-20 Huawei Proprietary and Confidential Page 8 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 9: Bom List

    4.2 BOM List The following table is provided for reference only and is subject to change without notice. The latest component list is available on corresponding Huawei system. If you have any questions, contact the local technical personnel Description...
  • Page 10 CMOS-4BIT bidirectional voltage-level U10, U16, U18, U9 translator with auto direction sensing-I2C bus 39200222 Chip with the combination of single band 2.4GHz WLAN, Bluetooth 2.1, and FM-BCM4329 2012-07-20 Huawei Proprietary and Confidential Page 10 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 11 880–915 MHz, 1710–1785 MHz, 1850–1910 MHz 39070085 Battery management IC-4.1–16 V-DC-DC charging chip 39070055 Battery management IC-2.5–6.5 U1001 V-average current limiting-percentage (10%)-DRV 12020141 Crystal oscillator-19.2 MHz 2012-07-20 Huawei Proprietary and Confidential Page 11 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 12 Transient voltage suppression diode-6 D19, D20 V-15 V-15 W-1.5 A 14240243 Card connector-micro SD receptacle 14240272 connector-micro_B-female-5pin-bend-S 14240268 IO connector-micro HDMI-19-D type 14240199 BTB connector-female-10pin-0.4 mm-0.9 mm 2012-07-20 Huawei Proprietary and Confidential Page 12 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 13 23040205 LCD module-single display 23060061 Camera module group-CMOS-1.3 M-FF 23060062 Camera module group-CMOS-5 M-AF 14240276 IO connector-DC JACK 14240340 Headset connector Main antenna-S7-303u-(sensor FPC) 27160803 2012-07-20 Huawei Proprietary and Confidential Page 13 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 14: Software Upgrade

    Step 1 Delete the information in the Micro SD card or format the SD card. Step 2 Create a folder named dload in the root directory of the Micro SD card, and copy the upgrade file to dload. 2012-07-20 Huawei Proprietary and Confidential Page 14 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 15: Troubleshooting

    SD card. For more information, see the appendix of this chapter. 2012-07-20 Huawei Proprietary and Confidential Page 15 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 16: Upgrade Using The Usb

    Qualcomm HS-USB QDLoader 9008. If the port driver has not been installed before, a message for installing the driver will be displayed. 2012-07-20 Huawei Proprietary and Confidential Page 16 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 17 S7-PRO Maintenance Manual (Basic Version V2.1) INTERNAL Step 2 Select Choose the install from a list or specific location (Advanced). Then click Next. 2012-07-20 Huawei Proprietary and Confidential Page 17 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 18 Step 3 Click Browse in the window displayed to select the USB driver to be installed, as shown in the following figure. Then click Next. 2012-07-20 Huawei Proprietary and Confidential Page 18 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 19: Programming Using The Qpst Software

    If the QPST software has been installed, run the eMMC Software Download tool and do as follows: Step 1 Ensure that you select Program Boot Loaders and Program MMC device. 2012-07-20 Huawei Proprietary and Confidential Page 19 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 20 Step 3 Click Browse. In the Select Port window, check whether the value of Phone is Q/QCP-XXX (Download) (COM15), and whether the port is consistent with that shown in the Device Manager window. Then click OK. 2012-07-20 Huawei Proprietary and Confidential Page 20 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 21 Ports, and click Add New Port. In the Add New Port window displayed, select corresponding USB/QC Diagnostic port. Double-click the selected port to add it to Port on the right. Then click OK. 2012-07-20 Huawei Proprietary and Confidential Page 21 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 22 S7-PRO Maintenance Manual (Basic Version V2.1) INTERNAL The following window is displayed (if the port is available, the Q/QCP-XXX (Download) is displayed). 2012-07-20 Huawei Proprietary and Confidential Page 22 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 23 Seach Path Folder window. Step 7 When all preceding steps are completed, the Download button will become clickable. Then click Download. 2012-07-20 Huawei Proprietary and Confidential Page 23 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 24: Troubleshooting

    You can ignore it, because you may enter the trusted mode that requires no driver (USB MassStorage port is used in the trusted mode). 2012-07-20 Huawei Proprietary and Confidential Page 24 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 25 QPST software (that is, the Qualcomm MMC Storage USB Device is displayed). Then perform the upgrade using the USB according to the steps for upgrade in the trusted mode. 2012-07-20 Huawei Proprietary and Confidential Page 25 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 26: Viewing The Software Version

    In the standby state, choose Settings > About phone to view the information about the software version. 6 Maintenance Tools Name: constant-temperature hot air gun Purpose: heat components 2012-07-20 Huawei Proprietary and Confidential Page 26 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 27 Purpose: secure the main board. Name: lead-free solder wire Purpose: soldering Name: digital multimeter Purpose: measurement during maintenance Name: tool kit Purpose: assemble and disassemble the device 2012-07-20 Huawei Proprietary and Confidential Page 27 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 28: Disassembly Procedures

    1. Ensure that the ESD wrist strap is below. properly grounded. 3. Remove the lower decorative cover 4. Remove the upper decorative cover with with the sucker. the sucker. 2012-07-20 Huawei Proprietary and Confidential Page 28 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 29 7. Disassemble the rear cover. 8. Loosen the BTB connector of the battery. 9. Take out the glued battery. 10. Loosen the BTB connector marked in the picture. 2012-07-20 Huawei Proprietary and Confidential Page 29 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 30 13. Remove the JACK FPC of the headset. 14. Remove the screws marked in the picture. 15. Remove the connector of the headset. 16. Remove the auxiliary board. 2012-07-20 Huawei Proprietary and Confidential Page 30 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 31 20. Remove the FPCs marked in the picture. 21. Remove the seven screws securing the 22. Remove the LCD from other cover A LCD. assembly. 2012-07-20 Huawei Proprietary and Confidential Page 31 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 32 24. Place the protective film on the lens. 25. Remove the speaker on the rear cover. 26. Remove the vibrator on the rear cover. 27. Remove the front camera. 2012-07-20 Huawei Proprietary and Confidential Page 32 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 33: Assembly Procedures

    4. Install the LCD. 5. Tighten the screws marked in the picture 6. Place FPCs at the positions marked in the to secure the LCD. picture. 2012-07-20 Huawei Proprietary and Confidential Page 33 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 34 10. Tighten the screws marked in the picture position marked in the picture. to secure the main board. 11. Install the auxiliary board. 12. Install the connector of the headset. 2012-07-20 Huawei Proprietary and Confidential Page 34 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 35 15. Secure the BTB connector of the 16. Install the rear camera. headset. 17. Secure the BTB connectors marked in 18. Install the battery. the picture. 2012-07-20 Huawei Proprietary and Confidential Page 35 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 36 Note: The springs of them must face each other. 23. Secure the front cover and rear cover. 24. Tighten the screws on the rear cover. 2012-07-20 Huawei Proprietary and Confidential Page 36 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 37: Troubleshooting For Common Failures

    Modem μP: ARM1136™ + L2 cache (256 kB) at up to 384 MHz Modem DSP: QDSP4 processor (to 147 MHz) Resource power manager: ARM7 (54 MHz) Sensor peripheral subsystem (SPSS): ARM7 (64 MHz) Characteristics of the chip: 2012-07-20 Huawei Proprietary and Confidential Page 37 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 38 ---» UART ports, UIM ports, I2C ports, and SPI ports (master only); ---» USB interfaces: HS USB 2.0 OTG with built-in USB PHY, FS USB (without built-in USB PHY), and USB-UICC 2012-07-20 Huawei Proprietary and Confidential Page 38 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 39 ---» PCM: for Bluetooth ---» TSIF: up to two ports ---» NFC: with external NFC device The MSM8260 functional block diagram is shown in the following figures. 2012-07-20 Huawei Proprietary and Confidential Page 39 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 40: Power-On Failure

    Connect the 5 V DC regulated power supply to the DC power interface with the battery not in place. The device is powered on and starts to run. Connect the DC adapter to the power-on circuits. 2012-07-20 Huawei Proprietary and Confidential Page 40 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 41 S7-PRO Maintenance Manual (Basic Version V2.1) INTERNAL Power_key circuit: 2012-07-20 Huawei Proprietary and Confidential Page 41 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 42 6. Each domain needs to reach the 90% value before the next domain starts ramping up. For example, when VDD_C1 reaches 90% of the specified value, the VDD_P3 supply can start ramping up. 2012-07-20 Huawei Proprietary and Confidential Page 42 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 43 The VDD_QFUSE_PRG pin should be connected to a 1.8 V power supply only for blowing fuses; otherwise, this pin must be grounded and never be left floating. The kernel system power-on waveform is shown in the following figure. 2012-07-20 Huawei Proprietary and Confidential Page 43 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 44 S7-PRO Maintenance Manual (Basic Version V2.1) INTERNAL Voltage: 2012-07-20 Huawei Proprietary and Confidential Page 44 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 45 USB PHY; HDMI L6 (PMOS) On, 1.800 V 1.5 to 3.3 V 1.750 to 3.3 V USB PHY; RF XO circuits; PA L7 (PMOS) DAC; Q-fuse 2012-07-20 Huawei Proprietary and Confidential Page 45 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 46 Not applicable Sensors, HDMI LVS0 (100 mA) LVS1 (100 mA) Off, –1.800 V –1.700 to –1.900 –1.700 to –1.900 V Headset circuits NCP (200 mA) 2012-07-20 Huawei Proprietary and Confidential Page 46 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 47: Power-On Failure - High Current

    SMT or IC damage. For the maintenance procedures, see Figure 9-1, Figure 9-2, and Figure 9-3. 2012-07-20 Huawei Proprietary and Confidential Page 47 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 48 Check whether short circuit occurs in the C418/C419/C420/ Replace U7 C423/C424 Check whether short circuit occurs in C442, C435, C444, and Replace U2 C445 Replace U2 2012-07-20 Huawei Proprietary and Confidential Page 48 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 49 S7-PRO Maintenance Manual (Basic Version V2.1) INTERNAL Figure 9-1 2012-07-20 Huawei Proprietary and Confidential Page 49 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 50: Power-On Failure - Low Current

    SMT. For the maintenance procedures, see Figure 9-1, Figure 9-2, and Figure 9-3. 2012-07-20 Huawei Proprietary and Confidential Page 50 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 51: Charge Failure

    VPH_PWR respectively. Analysis: The U48 manages the charging of S7 Pro. For the maintenance procedures upon charge failure, see the Appendix 1 (diagram of PRO components). 2012-07-20 Huawei Proprietary and Confidential Page 51 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 52: Failure To Identify Sim Card

    When the SIM card is inserted, the voltage of SIM_CD changes from a high level to a low level. Remark: For the maintenance procedures, see Appendix 1 (diagram of PRO components). Perform the eMMC programming again (U12). 2012-07-20 Huawei Proprietary and Confidential Page 52 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 53 Check whether the voltage of Replace Z12 C591 ranges from 1.8 V to 3.3 V Perform the eMMC programming again (U12) 2012-07-20 Huawei Proprietary and Confidential Page 53 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 54: Failure To Identify Sd Card

    S7-PRO Maintenance Manual (Basic Version V2.1) INTERNAL 9.5 Failure to Identify SD Card Diagram of the circuits: 2012-07-20 Huawei Proprietary and Confidential Page 54 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 55 When the SD card is inserted, the voltage of SDC3_CARA_CD changes from a high level to a low level. The MSM8260 determines that the SD card is available. Then call the SD card driver to access the SD card. 2012-07-20 Huawei Proprietary and Confidential Page 55 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 56 S7-PRO Maintenance Manual (Basic Version V2.1) INTERNAL 2012-07-20 Huawei Proprietary and Confidential Page 56 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 57 Check whether short circuit to ground occurs in R10, R9, R12, Replace the SD card socket R13, and R8 on the auxiliary Repair the auxiliary board 2012-07-20 Huawei Proprietary and Confidential Page 57 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 58: Display Failure

    S7-PRO Maintenance Manual (Basic Version V2.1) INTERNAL 9.6 Display Failure LCD driver circuits: LCD backlight driver circuits: 2012-07-20 Huawei Proprietary and Confidential Page 58 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 59 The block diagram of SN75LVDS83BZQLR is shown in the following figure. Remark 1: Although the backlight can be turned on, no image is displayed. See the following chart for maintenance procedures. 2012-07-20 Huawei Proprietary and Confidential Page 59 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 60: Touchscreen Failure

    Replace Q22 occurs in Q22 Check whether J9 shows any Repair J9 insufficient or staggered soldering Replace the LCD 9.7 Touchscreen Failure Diagram of circuits: 2012-07-20 Huawei Proprietary and Confidential Page 60 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 61: Audio Failure

    Check whether short circuit occurs in U35 Replace U35 Check whether short circuit occurs in U19 Replace U19 Replace the TP (touchscreen) 9.8 Audio Failure 9.8.1 Speaker Failure Diagram of circuits: 2012-07-20 Huawei Proprietary and Confidential Page 61 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 62 Check whether short circuit Replace U14 and U15 occurs in U14 and U15 Check whether short circuit Replace the SPK occurs in SKP Replace the SPK-FPC 2012-07-20 Huawei Proprietary and Confidential Page 62 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 63: Headset Failure

    The S7 Pro camera transmits signals through the MIPI. The red part indicates the power supply circuit of the camera. See the following chart for maintenance procedures. 2012-07-20 Huawei Proprietary and Confidential Page 63 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 64: Vibration Failure

    J2 and J6 Replace the camera 9.10 Vibration Failure Diagram of circuits: Principle: The motor controls the vibration based on the differential pressure of the input PIN. 2012-07-20 Huawei Proprietary and Confidential Page 64 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 65: Rf Failure

    INTERNAL Vibration failure occurs The motor becomes faulty Replace the motor PFC Replace the motor 9.11 RF Failure Figure 9-4 Block diagram of QTR8615 RF 2012-07-20 Huawei Proprietary and Confidential Page 65 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 66 The red part indicates the transmit channel, and the blue part indicates the receive channel. Both the transmit channel and the receive channel are connected to the antenna switch through the duplexer (U20). 2012-07-20 Huawei Proprietary and Confidential Page 66 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 67 Both the transmit channel and the receive channel are connected to the antenna switch through the duplexer (U31). Figure 9-9 Diagram of circuits of WCDMA850 RF channels 2012-07-20 Huawei Proprietary and Confidential Page 67 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 68 Figure 9-11 Diagram of circuits of GSM transmit channels The green part indicates the GSM HB channel, and the blue part indicates the GSM LB channel. 2012-07-20 Huawei Proprietary and Confidential Page 68 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 69: Maintenance Procedures For Transmit Failure

    Check the input signal, output signal, Check whether the antenna logic control signal, and power supply. switch (U46) works normally If any exception is found, replace U46 2012-07-20 Huawei Proprietary and Confidential Page 69 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 70: Wcmda1900 Transmit Calibration Failure

    Check the input signal, output signal, Check whether the antenna logic control signal, and power supply. switch (U46) works normally If any exception is found, replace U46 2012-07-20 Huawei Proprietary and Confidential Page 70 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 71: Aws Transmit Calibration Failure

    Check the input signal, output signal, Check whether the antenna logic control signal, and power supply. switch (U46) works normally If any exception is found, replace U46 2012-07-20 Huawei Proprietary and Confidential Page 71 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 72: Wcmda850 Transmit Calibration Failure

    Check the input signal, output signal, Check whether the antenna logic control signal, and power supply. switch (U46) works normally If any exception is found, replace U46 2012-07-20 Huawei Proprietary and Confidential Page 72 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 73: Wcmda900 Transmit Calibration Failure

    Check the input signal, output signal, Check whether the antenna logic control signal, and power supply. switch (U46) works normally If any exception is found, replace U46 2012-07-20 Huawei Proprietary and Confidential Page 73 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 74: Gsm Hb Transmit Calibration Failure

    Check the input signal, output signal, logic control signal, and power Check whether the antenna switch supply. If any exception is found, (U46) works normally replace U46 2012-07-20 Huawei Proprietary and Confidential Page 74 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 75: Gsm Lb Transmit Calibration Failure

    Check the input signal, output signal, logic control signal, and power Check whether the antenna supply. If any exception is found, switch (U46) works normally replace U46 2012-07-20 Huawei Proprietary and Confidential Page 75 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 76: Maintenance Procedures For Receiving Failure

    (U20, U41, U31, U21, and U32) are normal Check whether Check the power supply for U23. If any QTR8615 (U23) works exception is found, replace U23 normally 2012-07-20 Huawei Proprietary and Confidential Page 76 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 77: Maintenance Procedures For Gsm Receive Failure

    Replace U21 (U21) (GSM850) are normal Check whether Check the power supply for U23. If any QTR8615 (U23) works exception is found, replace U23 normally 2012-07-20 Huawei Proprietary and Confidential Page 77 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 78: Gps Failure

    Figure 9-12 Diagram of GPS front end circuit The area in red indicates the SAW filter and LANchannel, and the area in blue indicates the commonly used duplexer for Wi-Fi. 2012-07-20 Huawei Proprietary and Confidential Page 78 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 79 4 can receive the GPS signal normally Check the power supply for Check whether QTR8615 U23. If any exception is found, (U23) works normally replace U23 2012-07-20 Huawei Proprietary and Confidential Page 79 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 80: Wi-Fi/Bt Failure

    Figure 9-13 Diagram of circuits channel Use the 1P3T switch to choose the channel for Wi-Fi and BT channel. The Broadcom BCM4329 chip is used. 2012-07-20 Huawei Proprietary and Confidential Page 80 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 81 Check whether Z11 pin 1 Replace Z11 can output power signal normally Replace Z18 Check whether Z18 pin 3 can output power signal normally 2012-07-20 Huawei Proprietary and Confidential Page 81 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 82: Diagram Of Soldered Connections On Pcb And Bga Chip

    BGA Chip 11 Function Test 11.1 MMI Test Run the Calculator application, enter ()()2846579()(), and select Testing. Click MMI Test to start the MMI test. 2012-07-20 Huawei Proprietary and Confidential Page 82 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 83 Test the SIM card: If the SIM card is inserted, the message "SIM card exists" is displayed; otherwise, the message "No SIM card" is displayed. Click Success to proceed. 2012-07-20 Huawei Proprietary and Confidential Page 83 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 84 According to the icons on the screen, tilt the device in different directions. After a few seconds, the symbol "√" is displayed, indicating that the test succeeded. Click Success to proceed. 2012-07-20 Huawei Proprietary and Confidential Page 84 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 85 Step 6 LCD test If the device displays white, black, black-white strips, and colorful strips in sequence, the test succeeded. Click Success to proceed. 2012-07-20 Huawei Proprietary and Confidential Page 85 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 86 S7-PRO Maintenance Manual (Basic Version V2.1) INTERNAL 2012-07-20 Huawei Proprietary and Confidential Page 86 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 87 S7-PRO Maintenance Manual (Basic Version V2.1) INTERNAL Step 7 Number test The device will complete the test automatically. Click Success to proceed. 2012-07-20 Huawei Proprietary and Confidential Page 87 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 88 The device will complete the backlight test automatically. Click Success to proceed. Step 9 Speaker test If you can hear sound from the top and bottom speakers, the test succeeded. Click Success to proceed. 2012-07-20 Huawei Proprietary and Confidential Page 88 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 89 Step 10 Headset test Plug in or pull out the headset. If the color of the icon changes, the test succeeded. Click Success to proceed. 2012-07-20 Huawei Proprietary and Confidential Page 89 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 90 Step 12 Bluetooth test When nearby Bluetooth devices searched after the Bluetooth function is activated are displayed on the screen, the test succeeded. Click Success to proceed. 2012-07-20 Huawei Proprietary and Confidential Page 90 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 91 Step 14 Headset speaker test If you can hear sound from both the left channel and the right channel, the test succeeded. Click Success to proceed. 2012-07-20 Huawei Proprietary and Confidential Page 91 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 92 S7-PRO Maintenance Manual (Basic Version V2.1) INTERNAL Step 15 Compass test The device will complete the compass test automatically. Click Success to proceed. 2012-07-20 Huawei Proprietary and Confidential Page 92 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 93 Step 16 Built-in microphone test Switch between Record and Play. The sound will enter into the microphone and travel out from the speaker. Click Success to proceed. 2012-07-20 Huawei Proprietary and Confidential Page 93 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 94 The device will complete the coulometer test automatically. Click Success to proceed. Step 18 Motor test After the test is started, the motor will vibrate automatically. Click Success to proceed. 2012-07-20 Huawei Proprietary and Confidential Page 94 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 95 Step 20 HDMI test The device will complete the HDMI test automatically. If there is image and sound from the TV, the test succeeded. Click Success. 2012-07-20 Huawei Proprietary and Confidential Page 95 of 97 Copyright © Huawei Technologies Co., Ltd.

  • Page 96: Voice Call Test

    When all tests are completed, the results are displayed on the screen. Press the Home key to exit. 11.2 Voice Call Test Step 1 Insert a functional SIM card, and press and hold the Power button to power on the device. 2012-07-20 Huawei Proprietary and Confidential Page 96 of 97 Copyright © Huawei Technologies Co., Ltd.
  • Page 97 Step 3 Call a fixed-line number to test the voice quality during the call. Step 4 If no problem is found during the test, end the test. 2012-07-20 Huawei Proprietary and Confidential Page 97 of 97 Copyright © Huawei Technologies Co., Ltd.

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