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Lenovo S930 Service Manual
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Lenovo S930 Service Manual

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Lenovo S930
Service Manual
LENOVO

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Summary of Contents for Lenovo S930

  • Page 1 Lenovo S930 Service Manual LENOVO...

  • Page 2: Table Of Contents

    LENOVO S930 Cellphone Service Manual Content CELLPHONE APPEARANCE ....................4 LAYOUT OF MOTHERBOARD ....................4 BASEBAND ............................ 6 ........................... 7 DISPLAY When the device is turned on there’s nothing on screen ............7 3.1.1 LCD backlight doesn’t light up.................... 8 3.1.2...
  • Page 3 GPS - ................. 31 SEARCH SATELLITES AND LOCATE FM - ......................31 SEARCH CHANNELS HOW TO ASSEMBLE AND DISSEMBLE LENOVO S930 ............ 32 LENOVO S930 ................32 SSEMBLY SEQUENCE OF ’ LENOVO S930 ............... 32 OS AND DON TS WHEN ASSEMBLING (11)LOCK TF CONNECTOR COVER AFTER TAKING OFF TF CARD.

  • Page 4: Cellphone Appearance

    1 Cellphone appearance Layout of motherboard Front of motherboard:...
  • Page 5 LENOVO S930 Cellphone Service Manual Back of motherboard: Page 5...

  • Page 6: Baseband

    LENOVO S930 Cellphone Service Manual 3 Baseband Page 6...

  • Page 7: Lcd Display

    LENOVO S930 Cellphone Service Manual Electronic circuit diagram 3.1 LCD display 3.1.1 When the device is turned on there’s nothing on screen Screen is blank. Check whether the connectors of the LCD are attached correctly. Re-install FPC. Check whether the cellphone works.

  • Page 8: Lcd Backlight Doesn't Light Up

    LENOVO S930 Cellphone Service Manual 3.1.2 LCD backlight doesn’t light up. backlight doesn’t light up. Check whether connections between FPC of LCD module and connectors on motherboard are good. Reconnect them. Check whether LCD backlight works. Check whether the output of the backlight Replace U1601.
  • Page 9 LENOVO S930 Cellphone Service Manual Can’t take photos. Dissemble the unit. Check whether the Camera module is detached. Re-assemble the module. Check whether it can take photos. Replace the Camera module. Check whether it can take photos. Check the solder joints of the Camera module connectors.

  • Page 10: Front Camera Doesn't Work Properly

    LENOVO S930 Cellphone Service Manual 3.2.2 Front camera doesn’t work properly. Can’t take photos. Dissemble the unit. Check whether the Camera module is detached. Re-assemble the module. Check whether it can take photos. Replace the Camera module. Check whether it can take photos.

  • Page 11: Ring And Vibration

    LENOVO S930 Cellphone Service Manual 3.3 Ring and Vibration 3.3.1 It does not vibrate. It does not vibrate. Check whether the solder joints of the motor and the peripheral components are normal. Re-solder and retry to see whether the problem is fixed.
  • Page 12 LENOVO S930 Cellphone Service Manual It does not ring. Replace speaker. Retry to see whether it rings. Check whether audio power amplifier on antenna sub-board has a dry joint problem or is damaged. Repair soldering or replace it. Try again to see whether it rings.

  • Page 13: Charging

    LENOVO S930 Cellphone Service Manual 3.4 Charging 3.4.1 It doesn’t show the charging indicator when charger is plugged in. Page 13...
  • Page 14 LENOVO S930 Cellphone Service Manual It doesn’t show the charging indicator when charger is plugged in. Replace the charger. Check Replace the whether it can charge normally. charger. Replace the battery. Check whether it Replace the can charge normally and the battery’s battery.

  • Page 15: It Shows The Charging Indicator. But The Battery Can't Be Fully Charged

    LENOVO S930 Cellphone Service Manual 3.4.2 It shows the charging indicator. But the battery can’t be fully charged. It shows the charging indicator. But the battery can’t be fully charged. Replace the battery and try again to see whether the battery can be fully charged.

  • Page 16: Keyboard And Keyboard Backlight

    LENOVO S930 Cellphone Service Manual 3.5 Keyboard and keyboard backlight 3.5.1 Keyboard can’t work properly. keyboard can’t work properly. Check whether the touch panel isn’t connected properly or is damaged. Replace motherboard. Page 16...

  • Page 17: Keyboard Backlight Doesn't Light Up

    LENOVO S930 Cellphone Service Manual 3.5.2 Keyboard backlight doesn’t light up. Keyboard backlight doesn’t light up. LED is damaged, replace it. Some backlights don’t light up Is the main FPC connected properly? Replace U1201. Page 17...

  • Page 18: Audio Problems During Phone Calls

    LENOVO S930 Cellphone Service Manual 3.6 Audio problems during phone calls 3.6.1 You can’t hear the person you are talking to during a phone call. The receiver is silent. Check whether the speaker is OK and connected properly. Replace the speaker. Try again to see whether the problem is fixed.

  • Page 19: You Can't Be Heard By The Person You Are Talking To During A Phone Call

    LENOVO S930 Cellphone Service Manual 3.6.2 You can’t be heard by the person you are talking to during a phone call. You can’t be heard by the person you are talking to. Check to see whether MIC and surrounding components need Re-solder.

  • Page 20: Device Will Not Turn On

    LENOVO S930 Cellphone Service Manual 3.7 Device will not turn on. Device will not turn on. Check whether the power-on key is soldered Re-solder. properly or has a dry joint problem? Is there a big current when power supply of Motherboard is damaged.

  • Page 21: Radio Frequency

    LENOVO S930 Cellphone Service Manual 4 Radio frequency 4.1 GSM calibration during production 4.1.1 GSM AFC calibration ⚫ Problem: AFC calibration failed. ⚫ Reason: Connections of RF test cable are not reliable during the calibration. TCXO is fitted reversely or has a dry joint problem. Receiving channel is open.

  • Page 22: Gsm Afc Calibration

    LENOVO S930 Cellphone Service Manual dry joint problems. ⚫ Troubleshooting: Rx path loss calibration failed. Check the calibration report to see whether all three frequency bands failed. Do L2101 and Check whether Re-connect Re-solder. Did GSM C2117 have dry connections of RF cable...
  • Page 23 LENOVO S930 Cellphone Service Manual module’s RF input circuits are shifted, and shield bracket is short circuit. ⚫ Troubleshooting: PCL calibration failed. Check the calibration report to see whether every frequency band failed. Is AGC calibration DCS/PCS Analyse Did GSM...

  • Page 24: Gsm Comprehensive Test

    LENOVO S930 Cellphone Service Manual 4.2 GSM comprehensive test 4.2.1 Switching spectrum and PVT template are over the limits. ⚫ Switching spectrum and PVT template of three frequency bands (GSM, DCS and PCS) are over the limits. ⚫ If C2111 on PA’s V_ramp signal cable is damaged or has a dry joint problem, switching spectrum may become over the limits.

  • Page 25: Phase Error Is Too Big

    LENOVO S930 Cellphone Service Manual Frequency Error is over the limit. Re-calibrate. Check whether U2104 is damaged or has a dry joint problem. Replace components which have dry joint problems. 4.2.3 Phase Error is too big. ⚫ Problem: Phase Error is over the limit in whole-unit test.

  • Page 26: Power Output Related Problems

    LENOVO S930 Cellphone Service Manual 4.2.4 Power output related problems ⚫ Problem: The device can turn on and receive signals normally. But there’s no power output or power output is very low, when it is trying to output power of double frequency bands or single frequency band.

  • Page 27: Wcdma Calibration During Production

    LENOVO S930 Cellphone Service Manual 4.3 WCDMA calibration during production 4.3.1 WCDMA Rx Path Loss calibration Problem: Item Rx Path Loss failed. Reason: Receiving channel has a problem. Troubleshooting: Rx Path Loss failed. Does PA module (U2202) have a dry joint problem? Re-solder.

  • Page 28: Wcdma Tpc Calibration

    LENOVO S930 Cellphone Service Manual 4.3.2 WCDMA TPC calibration Problem: Item TPC failed. Reason: Emission channel has a problem. Troubleshooting: TPC failed. Check whether Re-connect and connections of RF cable calibrate. and fittings are reliable. Do RF connector CON2101, PA module (U2202), C2218 and C2219 have dry joint Re-solder.

  • Page 29: Wcdma Comprehensive Test

    LENOVO S930 Cellphone Service Manual 4.4 WCDMA comprehensive test 4.4.1 ACLR or SEM Problem: ACLR or SEM. Reason: It’s not calibrated; or WCDMA PA (U2202) has a dry joint problem; or RF receiver and transmitter (U2101) is faulty. Troubleshooting: ACLR or SEM Re-perform WCDMA calibration.

  • Page 30: Wifi Test

    LENOVO S930 Cellphone Service Manual 4.5 WiFi test Problem: Can’t find WiFi Reason: WiFi/BT/GPS/FM four-in-one chip (U2301) and its surrounding circuits have soldering problems. Troubleshooting: Can’t find WiFi. Does MT6627(U2301) have a dry Re-solder. joint problem? Re-solder. Do U2301, U2302 have dry joint problems? Replace main chip MT6627(U2301).

  • Page 31: Gps - Search Satellites And Locate

    FPC again. components voltage motherboard. supply of LCD FPC components button. talking LENOVO S930 Cellphone Service Manual don’t battery can’t light U302. whether C0202. frequency of components problem Re-solder. works talking to. of keys is...

  • Page 32: How To Assemble And Dissemble Lenovo S930

    LENOVO S930 Assembly sequence of LENOVO S930 Fig. 5-1 Main assembly exploded view of LENOVO S930 LENOVO S930 5.2 Dos and don’ts when assembling (1) To avoid interference with the FPC of LCD itself, the LCD gasket should not be...

  • Page 33: Lock Tf Connector Cover After Taking Off Tf Card. Be Sure That Connector Cover Is In Lock Position When The Phone Is Packed

    LENOVO S930 Cellphone Service Manual assembled slant. (2) Assemble fixture should be used to assemble TP to front housing. (3) Before assembling motherboard to the front cover assembly, make sure that the silicone cushion on the P-sensor sensor is fitted properly.

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