Huawei MediaPad 7 Lite S7-931w Maintenance Manual Download Page 39

Page: 39 / 82

MediaPad 7 Lite Maintenance Manual

INTERNAL

2012-10-08

Huawei Confidential

Page 39 of 82

Figure 9-2

Charger IC U1801

Figure 9-3

The output voltage of

the U9003 is 3 V.

The output voltage of

the U9000 is 1.8 V.

The U9002 is used

to power the CPU

and its output

voltage is 1.2 V.

The U9001 is used to

power four DDR3s and its

output voltage is 1.5 V.

Summary of Contents for MediaPad 7 Lite S7-931w

Page 1: ... Manual V1 0 Prepared by Documentation team of the Product Development Unit Date 2012 09 04 Reviewed by Technical support platform of the Product Development Unit Date 2012 09 04 Approved by Service representative platform of the Product Development Unit Date 2012 09 04 Huawei Technologies Co Ltd All rights reserved ...

Page 2: ...MediaPad 7 Lite Maintenance Manual INTERNAL 2012 10 08 Huawei Confidential Page 2 of 82 Change History Date Revision Version Change Reason Changed Section Change Description Author 2012 09 04 V1 0 ...

Page 3: ...e PCBA 11 4 2 BOM List 12 5 Software Upgrade 16 5 1 Upgrade Environment 16 5 2 Upgrade Using a microSD Card 16 5 2 1 Copying the Upgrade File from the Computer 16 5 3 Upgrade Process 17 5 4 Troubleshooting 18 6 Upgrading Using the USB 19 6 1 Entering USB Upgrade Mode 19 6 2 Installing the Driver 19 6 3 Batch Firmware Upgrade 22 7 Maintenance Tools 24 8 Disassembly Procedure 26 9 Troubleshooting fo...

Page 4: ...8 Speaker Failure 47 9 9 Headset Failure 49 9 10 Network Camera Failure 49 9 11 Vibration Failure 50 9 12 Wi Fi Failure 51 9 13 Bluetooth Failure 52 9 14 GPS Failure 53 9 15 Position of the SH1931UT in MediaPad 7 Lite 55 10 Solder Points on the PCB and BGA Chip 61 11 Function Tests 63 11 1 Preparations 63 11 2 Delivery Software Customized Software Entering the MMI Test Mode 63 11 3 Production Soft...

Page 5: ...e Manual INTERNAL 2012 10 08 Huawei Confidential Page 5 of 82 1 Product Overview 1 1 Appearance 1 2 Product Models MediaPad 7 Lite has multiple models The following table describes the main functional differences of these models ...

Page 6: ... web page browser High definition HD multimedia play Android ICS 4 0 7 inch Wide Screen Video Graphics Array WSVGA In Plane Switching IPS 1024x600 HD multi touch screen Cortex A8 1 2GHz CPU Rear network camera with 3 2 megapixels Full HD play GPS A GPS 4100 mAh battery Wi Fi 802 11b g n Dimensions H W D 11 mm x 194 mm 120 mm Weight About 370 g including the battery Screen Type IPS LCD Glare Size 7...

Page 7: ...S7 Bluetooth Standard compliance Bluetooth 3 0 2 1 EDR compatible Transmit power 6 dBm Power Class 1 5 Litefile A2DP AVRCP FTP HSP OPP HID PAN Key and indicator Power key Volume adjustment key Interface sensor and audio configuration 3 5 mm stereo headset interface MicroSD card slot compatible with the SDHC card supporting the maximum memory of 32 GB USB interface micro USB 2 0 MHL compliant inter...

Page 8: ... 3 2 megapixels fixed focal length Operating system Linux 2 6 35 Android ICS 4 0 2 Maintenance Instructions 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 ...

Page 9: ... components screws and insulators are correctly installed and all cables are correctly connected after maintenance and calibration and that all cables and wires are installed and connected correctly Soldering is lead free and compliant with the environmental protection requirements ESD is the main cause of damage to electrostatic sensitive components Each ASC must exercise caution to avoid ESD dam...

Page 10: ...rt of the rear coverl Protective glass of the network camera Mechanical label Rear cover assembly Battery connector tablet Diversity antenna Front network camera Audio box Side key support Battery Main control board Headset socket LCD tablet LCD tablet LCD tablet POGOPIN LCD LCD foam Antenna Front cover assembly TP Rear network camera Antenna USB PCBA ...

Page 11: ... of the rear network camera J1102 Connector of the front network camera U1700 Audio PA U1600 Audio decoding U1900 Gravity induction U6001 IC for switching between a 27M clock and a 32K clock U 6000 RTC J1600 ZIF connector of the headset U1302 Nandflash U4 CPU U500 U5001 U5002 U5003 DDR3 4 U9001 Supplying power for the DDR3 with 1 5 V output voltage U9002 Supplying power for the CPU with 1 2 V outp...

Page 12: ...e only The latest BOM information can be downloaded in the system of Huawei Part Number Description Place 14240181 BTB Connector Fmale 24Pin 0 4mm SMT Mating Height 1 0mm Terminal Dedicated J1102 J1200 14090083 Soft Print Board Connector 33Pin 0 3mm 0 3mm 0mm J1300 14090042 Flexible Printed circuit Connector 9 PIN 0 5mm 0 5mm Angle Single Row PCB Welding Type SMT Upside Contact Mobile Dedicated J1...

Page 13: ... 3 3V TF BGA512 Terminal Dedicated U4 39110682 LDO 2 5V 2 Max 0 3A SOT23 5 Terminal dedicated U1000 39110548 LDO 3 3V 2 0 15A SC70 5 Terminal Dedicated U1001 U1300 39110490 Voltage Regulator 1 2V LDO Regulator 2 0 15A SOT 23 5A Terminal Dedicated BT U1002 39110471 Voltage Regulator 2 85 3 0 15A SOT 23 5 Terminal Dedicated from39110307 U1200 43140104 Interface Controller RGB to LVDS 1 8 3 3V Termin...

Page 14: ...ltage Monitor 2 7V Delay Reset Chip 0 9V 6V SOT23 3 Terminal Dedicated U2000 47140049 RF Switch 0 5 3 0 GHz SP3T 0 45dB 1 22 20dB TSON 200 260V HB M Terminal Dedicated U2100 39210010 Terminal Baseband process IC Single Band 2 4GHz WLAN Bluetooth 2 1 FM Single chip BCM4330 2 3 5 5V WLBGA133 Pb free U2101 39210036 Terminal Baseband Peripheral IC GPS Receiver support GLONESS 2 3 5 5V WLBGA42 Pb free ...

Page 15: ...10566 Switching Regulators 1 4V 1 5A SMT Terminal Dedicated U9000 U9001 U9002 U9003 36020382 CMOS Power on reset MLP 8 2 x 2x 0 8mm 0 5mm Pitch 300ns 0 5mA COMS COMS 3ns U9004 12020216 Crystal 37 4MHz 10pF 8 3pF 9pF 10ppm 80ohm 2016 Terminal Dedicated X2100 12020125 Crystal 0 032768MHz 12 5pF 30ppm 60 80kohm 3 2 1 5 SMD Terminal Dedicate ELOM TS16949 X6000 12020171 Crystal Oscillator 27MHz 12pF 20...

Page 16: ...on is for your reference only Download the latest version for upgrade Update tool RKBatchTool exe Upgrade method Using a microSD card Using a USB cable 5 2 Upgrade Using a microSD Card 5 2 1 Copying the Upgrade File from the Computer 1 Check the current upgrade environment Ensure that the microSD card can be read and written 2 Obtain the upgrade package Copy the dload directory to the microSD card...

Page 17: ... the ZIP package structure stored on the computer instead of the ZIP package on the microSD card You can also use MyDiskTest to check the available storage space of the microSD card The size of the copied upgrade package must be smaller than this space 3 Ensure that MediaPad 7 Lite is powered off 4 Insert the microSD card into the MediaPad 7 Lite 5 The microSD card is automatically upgraded after ...

Page 18: ...played on the screen during the upgrade indicating that the upgrade failed In this case check whether improper operations are performed Then remove the microSD card and install it again or replace the microSD card and try upgrading the software again Failure 2 If a failure occurs at the beginning of the upgrade process check whether the upgrade version is correct and whether MediaPad 7 Lite or mic...

Page 19: ...d New Device is displayed indicating that the system has entered USB upgrade mode 6 2 Installing the Driver Before upgrading the firmware close the player Press the volume down key and connect MediaPad 7 Lite to the USB port of the PC If you install the driver for the first time the window shown in the following figure is displayed Choose to install the driver from the list or the specified positi...

Page 20: ...MediaPad 7 Lite Maintenance Manual INTERNAL 2012 10 08 Huawei Confidential Page 20 of 82 Select the rockusb sys file under the driver folder ...

Page 21: ...MediaPad 7 Lite Maintenance Manual INTERNAL 2012 10 08 Huawei Confidential Page 21 of 82 Up to now the driver of the USB device is installed ...

Page 22: ...e is in the loader state Pink The device is in the MSC state Red The operation failed Erase Flash memory and then perform upgrade In the MSC state perform switching before upgrade or repair Procedure 1 Insert MediaPad 7 Lite and enable it to enter the upgrade mode as shown in the preceding main window 2 Select firmware 3 Ensure that MediaPad 7 Lite is in the Rockusb state Maskrom or Loader state 4...

Page 23: ...l Page 23 of 82 Precautions Perform batch upgrade on the hub A maximum of four pieces of MediaPad 7 Lite can be upgraded at the same time Restart the batch upgrade program after modifying the configuration file Do not start other upgrade programs when running RKBatchTool exe ...

Page 24: ...ame soldering iron Usage to maintain and solder components Name DC power supply Usage to supply DC current Name soldering table Usage to secure the PCBA Name lead free solder wire Usage for soldering Name digital multimeter Usage to measure during repair Name toolkit Usage to assemble and disassemble components Name electric screwdriver Usage to fasten and remove screws ...

Page 25: ...MediaPad 7 Lite Maintenance Manual INTERNAL 2012 10 08 Huawei Confidential Page 25 of 82 Name guitar pick Usage to disassemble MediaPad 7 Lite Name air suction ball Usage to disassemble MediaPad 7 Lite ...

Page 26: ...ols 0 6 mm thick disassembly pick Do not use the metal disassembly pick that may easily damage MediaPad 7 Lite Small sized Phillips screwdriver used to disassemble the external three screws Small sized hexagon screwdriver used to disassemble the internal screws 1 Ensure that the ESD wrist strap is well grounded 2 Disassemble MediaPad 7 Lite as shown in the following figure ...

Page 27: ... a thin blade or other objects such as the nail into the gap between the decorative cap and the rear cover to upward separate the decorating part from the rear cover Note that the gap is narrow Insert the pick along the direction indicated by the yellow arrow You can also use an air suction ball to open the decorative cap ...

Page 28: ...rating part on the rear cover press the air suction ball and quickly pull out the air suction ball A gap is formed between the decorating part and the rear cover 2 Use the guitar pick to separate the decorating part from the rear cover 3 Disassemble the decorative cap and rear cover Decorative cap MediaPad 7 Lite 4 Remove screws ...

Page 29: ... Use the guitar pick to open the buckle along the direction indicated by the arrow to separate the front cover assembly from the rear cover assembly Use the guitar pick to open the buckle along the direction indicated by the arrow to separate the front cover assembly from the rear cover assembly Dust proof cover of the SD card holder 6 Open the front cover ...

Page 30: ... cover assembly from the lower edge Otherwise the TP FPC and LCD FPC will be broken 6 Open the rear cover from the longer edge without the microSD and SIM card holders Rear cover of MediaPad 7 Lite The microSD card holder and SIM card holder are at the other longer edge 7 Disassemble the internal assembly ...

Page 31: ... hexagon screwdriver to remove the headset and audio box open the tablets of the key FPC and battery connector and then disassemble the screw of the PCBA 8 Disassemble the LCD flexible printed circuit FPC and touchscreen FPC 8 Disassemble the LCD FPC and touchscreen FPC 9 Disassemble the FPCs of the power and volume keys ...

Page 32: ...f the power and volume keys are pasted on the PCBA using the adhesive Therefore you must use a wooden tweezers to carefully disassemble the FPCs 10 Disassemble the 10 self tapping screws used for fastening the speaker and audio box battery connector headset jack and PCBA Speaker and audio box Disassemble the screw of the battery connector tablet 10 Disassemble the 10 self tapping screws used for f...

Page 33: ...Lite Maintenance Manual INTERNAL 2012 10 08 Huawei Confidential Page 33 of 82 Rear network camera Headsets jack Front network camera The following figure shows the disassembled audio box Audio box Speaker monomer ...

Page 34: ... 7 Lite Maintenance Manual INTERNAL 2012 10 08 Huawei Confidential Page 34 of 82 3G main antenna The following figure shows the disassembled PCBA Top side of the PCBA of MeidaPad 7 Lite Bottom side of the PCBA ...

Page 35: ...odule MU509 charge management chip BQ24161 WLAN Bluetooth module BCM4330 24 bit RGB to LVDS transceiver and GPS module BCM47511 The characteristics of the main chip RK2918 are as follows The RK2918 provided by Rockchips Electronics CO Ltd is a high performance and low power consumption multimedia processing chip based on Arm Cortex A8 The RK2918 adopts the 3D acceleration technology and is designe...

Page 36: ...B NAND Flash Four 256 Mbit DDR3s USB 1 HS USB Electromagnetic compatibility Compliant with Huawei internal specification DKBA 1620 2007 5 Environment protection Lead free meeting RoHS PCBA and FPCs of MediaPad 7 Lite Board and FPC Hardware Version Function PCBA SH1931UM Used to function as the main control board FPC SH1931UL Used to connect the LCD FPC SH1931UF Used to connect the speaker FPC SH19...

Page 37: ...vision interface and USB interface reuse 13 Pog PIN interface Pedestal 1 The pedestal is used for serial port communication and charge 9 2 Startup Failure MediaPad 7 Lite can be normally started only when the following conditions are met Press the power key for 2 seconds when the battery is installed The battery is installed the USB interface is connected to the 5 V DC regulated power supply and M...

Page 38: ... short circuited Replace the U1801 No Check whether the output voltage of the U9000 U9001 U9002 U9003 is normal Check whether the U9000 U9001 U9002 U9003 is short circuited No Yes Check whether the output voltage of the U1001 U1000 U1002 is normal Yes No Check whether the U1001 U1000 U1002 is short circuited Yes Replace the U4 Startup failure due to high current ...

Page 39: ...ial Page 39 of 82 Figure 9 2 Charger IC U1801 Figure 9 3 The output voltage of the U9003 is 3 V The output voltage of the U9000 is 1 8 V The U9002 is used to power the CPU and its output voltage is 1 2 V The U9001 is used to power four DDR3s and its output voltage is 1 5 V ...

Page 40: ...rrent is about 120 mA after MediaPad 7 Lite is powered on This usually occurs when the coulometer or output voltage is abnormal Startup failure due to low current Startup failure due to low current Check the output voltage of the U1801 and check whether the voltage of the C1822 C1823 is 3 7 V No Replace the U1801 Yes Check whether the output voltage of the U9000 U9001 U9002 U9003 is normal No Chec...

Page 41: ...2012 10 08 Huawei Confidential Page 41 of 82 9 3 Charge Failure The following figure shows the charge principles The charge function of MediaPad 7 Lite is controlled by the U1801 For the solution see Figure 9 2 component layout of MediaPad 7 Lite ...

Page 42: ...oltage of the C1822 C1823 is 3 7 V No Replace the U1801 Yes Check whether the voltage of the R1818 is normal No Replace the U1800 Yes Replace the coulometer of the U1800 9 4 Failure to Identify the SIM Card The following figure shows the principles of the SIM card The SIM card cannot be identified For the solution see Figure 9 2 component layout of MediaPad 7 Lite ...

Page 43: ...ard failure Check whether MediaPad 7 Lite enters the offline mode Yes Set MediaPad 7 Lite to non offline mode No Check whether the voltage of the C1500 ranges from 1 8 V to 3 3 V Yes Replace the U2401 No Re load the U1302 9 5 Failure to Identify the MicroSD Card The following figure shows the principles of the microSD card ...

Page 44: ...igure 9 2 component layout of MediaPad 7 Lite Failure to identify the microSD card Check whether the voltage of the C1508 on the PCBA is 3 V No Check the output voltage of the U9003 Yes Check whether the U1500 is short circuited Yes Replace the U1500 No Check whether the R1513 R1512 R1509 R2017 R1508 R1511 R1520 is short to ground Replace the microSD card holder No 9 6 Display Failure ...

Page 45: ... the solution see the following flowchart Display failure no graphics are displayed Check whether the U1301 is short circuited Yes Replace the U1301 No Replace the LCD monomer and LCD FPC 9 6 1 Display Failure The following figure shows the voltage principles of the backlight The backlight cannot be illuminated For the solution see the following flowchart ...

Page 46: ...lluminated Check whether the U1801 is short circuited Yes Replace the U1801 No Check whether the Q1303 is short circuited Yes Replace the Q1303 No Check whether the J1300 is poorly soldered or is incorrectly connected Yes Repair the J1300 No Replace the LCD monomer 9 7 Touchscreen Failure The following figure shows the principles ...

Page 47: ...the output voltage of the U1300 is 3 3 V No Check whether the input voltage is 5 V and whether the U1300 is normal Yes Check whether the output voltage of the C1326 is 1 8 V No Check whether the output voltage of the U9000 is normal Yes Replace the TP touchscreen 9 8 Speaker Failure The following figure shows the principles ...

Page 48: ... the touchscreen is normal the 5 V power supply of the speaker power amplifier PA is normal In this case rectify the fault according to the following flowchart Speaker failure Check whether the U1700 is short circuited Yes Replace the U1700 No Check whether the resistance of the SKP monomer is 8 ohm No Replace the SPK monomer Yes Replace the SPK FPC ...

Page 49: ...ectly connected replace the headset jack 9 10 Network Camera Failure Network camera failure Check whether the voltage of the C1235 C1236 is 1 8 V and that of the C1201 is 2 8 V No Check whether the output voltage of the U9000 is 1 8 V and that of the U1200 is 2 8 V Yes Visually check whether an SMT soldering exception occurs on the J1200 J1102 NO Repair the J1200 J1102 Replace the network camera Y...

Page 50: ...ions 1 Measure whether the voltage of the R60005 is 3 V The voltage of the R60005 is 3 V if the system is normally started 2 Connect the R60001 to the CPU and use the multimeter to measure whether the impedance is normal 3 Measure whether the voltage is 3 V at both ends of the motor If yes replace the motor The following figure shows the circuits of the motor ...

Page 51: ...r the J2100 has SMT defects or quality problems Yes Replace the U2101 No Check whether the Z2100 Z2101 C2100 C2102 C2109 C2101 and C2105 have SMT defects or quality problems No Check whether the U2100 C2110 L2101 L2102 C2103 and L2100 have SMT defects or quality problems Yes Replace the corresponding part No Check whether the U2101 has SMT defects or quality problems Yes Replace the corresponding ...

Page 52: ...Bluetooth Failure Check whether the U2100 C2115 and C2104 have SMT defects or quality problems Yes Replace the corresponding part No Check whether the U2101 has SMT defects or quality problems Yes Replace the U2101 Bluetooth test failure The following figure shows the Wi Fi Bluetooth principles ...

Page 53: ...patible with the GLONNASS The BCM47511 chip provides an external GPS LNA interface to increase the GPS reception performance As shown in the following figure the GPS GLONASS signal received by the GPS antenna is filtered and then amplified by the LNA The SAW then sends the amplified signal to the BCM47511 chip for processing The following figure shows the principles of GPS reception ...

Page 54: ...he TCXO2300 No Check whether the z2100 L2304 C2310 L2305 R2306 Z2300 L2300 L2306 U2301 C2309 L2307 Z2301 C2316 C2311 and L2301 have SMT defects or quality problems Yes Replace the corresponding part No Check whether the U2300 has SMT defects or quality problems Yes Replace the TCXO2300 The following figure shows the GPS and Wi Fi Bluetooth silkscreen GPS circuits Wi Fi BT circuits ...

Page 55: ...ual INTERNAL 2012 10 08 Huawei Confidential Page 55 of 82 9 15 Position of the SH1931UT in MediaPad 7 Lite Connector of the rear network camera Connector of the front network camera 3G area Audio PA MU509 Nand flash CPU M U 5 0 9 模块 ...

Page 56: ...MediaPad 7 Lite Maintenance Manual INTERNAL 2012 10 08 Huawei Confidential Page 56 of 82 Top side MU509 area GPS area Top side Nand Flash area Wi Fi area ...

Page 57: ...MediaPad 7 Lite Maintenance Manual INTERNAL 2012 10 08 Huawei Confidential Page 57 of 82 Nand Flash area CPU area ...

Page 58: ...MediaPad 7 Lite Maintenance Manual INTERNAL 2012 10 08 Huawei Confidential Page 58 of 82 CPU area Areas for 4 DDR3s Position of the SH1931UT on the bottom side Bottom side Overall schematic drawing ...

Page 59: ...MediaPad 7 Lite Maintenance Manual INTERNAL 2012 10 08 Huawei Confidential Page 59 of 82 Bottom side Bottom side ...

Page 60: ...MediaPad 7 Lite Maintenance Manual INTERNAL 2012 10 08 Huawei Confidential Page 60 of 82 MicroSD card holder Bottom side SIM card holder Bottom side ...

Page 61: ...Solder Points on the PCB and BGA Chip The red part indicates the null PIN the green part indicates the ground and the blue part indicates the signal solder point The red part indicates the null PIN the green part indicates the ground and the blue part indicates the signal solder point Top side ...

Page 62: ...l Page 62 of 82 The red part indicates the null PIN the green part indicates the ground and the blue part indicates the signal solder point The red part indicates the null PIN the green part indicates the ground and the blue part indicates the signal solder point Bottom side ...

Page 63: ...card without write protection Prepare an SIM card Prepare a gravity induction test clamp and place the test prototype on it Prepare the Bluetooth AP and Wi Fi AP Prepare a USB OTG cable and a USB disk Prepare an MHL cable that is MHL to HDMI cable Only the 931WD supports the MHL function 11 2 Delivery Software Customized Software Entering the MMI Test Mode 1 Tap the calculator icon ...

Page 64: ...of 82 11 3 Production Software Entering the MMI Test Mode After MediaPad 7 Lite is normally powered on the MMI Test icon is available in the main window Tap this icon to access the MMI Test page 4 Tap MMI test 3 Tap the equal mark 2 Enter numerals in the dialog box for example 2846579 ...

Page 65: ...firmed That is you must select the test result after these test items are tested The results of other test items are automatically confirmed by the software The meanings of test results are as follows Success The test item passes the test Fail The test item does not pass the test As shown in the following figure the Success and Fail buttons are available ...

Page 66: ... before an MMI test which can increase the test efficiency MicroSD Card Test On the microSD card test page the system automatically detects the microSD card If the microSD card is not detected the message NO SD card available is displayed If the microSD card is detected the next test item is automatically executed Figure 11 1 Page displayed when the microSD card is detected SIM Card Test In an SIM...

Page 67: ... Bluetooth test the system automatically searches for the nearby Bluetooth devices Fifteen seconds later a window listing the searched Bluetooth devices is displayed and the next test item is executed If no Bluetooth devices are available nearby the system displays No Bluetooth devices found Search again To search for Bluetooth devices again tap OK otherwise tap Cancel ...

Page 68: ...no Bluetooth devices are found nearby Wi Fi Test In a Wi Fi test the system first searches for Wi Fi hot spots The searched Wi Fi hotspots are displayed on the screen The program automatically checks whether the Wi Fi test is successful If the Wi Fi test is successful the program automatically executes the next test item ...

Page 69: ...stem automatically executes the next test item Gravity Sensor Test In a gravity test the operator needs to place MediaPad 7 Lite on the clamp The system automatically tests the gravity If the test results on the X Y and Z axes are all about 45 degrees the test is successful Otherwise the test failed If the test is successful the next test is executed If the test failed the current window is retain...

Page 70: ...al Page 70 of 82 USB Host Test Before a USB host test connect the transfer cable of the USB disk and insert the USB disk If the test is successful the system automatically executes the next test item Otherwise the current window is retained displaying a test failure message ...

Page 71: ...ds to press these three keys on MediaPad 7 Lite If the test is successful these keys are displayed in blue Otherwise the test failed The back and home keys in this window are invalid Figure 11 4 Three keys displayed in blue test succeeded Capacitive Touchscreen Test In a touchscreen test tap and slide along the blue line If the blue line becomes a red line the test is successful Otherwise the test...

Page 72: ...onfidential Page 72 of 82 Figure 11 5 Blue line turned into red line test succeeded LCD Test In an LCD test press Success in turn Check whether bad spots light and dark spots exist on the displayed graphics If no bad spots exist select Success Otherwise select Fail ...

Page 73: ...ERNAL 2012 10 08 Huawei Confidential Page 73 of 82 LEAK Test In an LEAK test the entire screen is black Tap the screen The result confirmation page is displayed If the entire screen is black the test is successful Otherwise the test failed ...

Page 74: ...tomatically changes the backlight If the system normally changes the backlight the test is successful Otherwise the test failed Front Network Camera Test In a front network camera test the pictures taken by the front network camera are displayed on the screen If the pictures are normally displayed the test is successful Otherwise the test failed ...

Page 75: ...08 Huawei Confidential Page 75 of 82 Rear Network Camera Test In a rear network camera test the pictures taken by the rear network camera are displayed on the screen If the pictures are normally displayed the test is successful Otherwise the test failed ...

Page 76: ...eaker test a song is played If audio is normally output the test is successful Otherwise the test failed Speaker Loopback Testing In a recording test tap Record on the screen Three seconds later tap Play to play the recorded audio If the recorded audio is normal the test is successful Otherwise the test failed ...

Page 77: ...08 Huawei Confidential Page 77 of 82 Headset Loopback Test In a headset recording test insert the headset and tap Record to start recording After the recording is finished tap Play to play the recorded audio and check whether the recorded audio is normal ...

Page 78: ...MediaPad 7 Lite Maintenance Manual INTERNAL 2012 10 08 Huawei Confidential Page 78 of 82 ...

Page 79: ...est is successful Otherwise the test failed Headset Insertion Removal Test Perform headset insertion removal tests If the headset is not inserted in out and the circle in the middle are displayed in red Insert the headset press the linear controlled button of the headset and then remove the headset If in out and the circle in the middle are displayed in blue the test is successful and the next tes...

Page 80: ...anual INTERNAL 2012 10 08 Huawei Confidential Page 80 of 82 Motor Test In a motor test MediaPad 7 Lite starts to vibrate Place your hand on MediaPad 7 Lite If you feel the vibration the test is successful Otherwise the test failed ...

Page 81: ...HDMI Test The HDMI test is required only for 931WD In an HDMI test audios are played The cable for transferring to the HDMI is connected to the TV on MediaPad 7 Lite Check whether the images and audio data output from the TV are normal If yes the test is successful Otherwise the test failed ...

Page 82: ...12 10 08 Huawei Confidential Page 82 of 82 Test Results After all test items are finished the failed test items are displayed For 931WD a button for entering the pedestal test is available in the upper right corner as shown in the following figure ...

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