Repair Manual of Lenovo S920 Mobile Phone
3
Content
1. APPEARANCE..............................................................................................................................6
2. LAYOUT OF MAIN BOARD........................................................................................................7
3. BASEBAND...................................................................................................................................9
3.1 LCD DISPLAY .........................................................................................................................10
3.1.1 No display on screen after power-on.................................................................................10
3.1.2 LCD backlight without lighting ......................................................................................... 11
3.2 CAMERADEFECTS...................................................................................................................12
3.2.1 Rear camera defects ..........................................................................................................12
3.2.2 Front camera defects .........................................................................................................13
3.3 RING AND VIBRATION..............................................................................................................14
3.3.1 No vibration.......................................................................................................................14
3.3.2 No ring...............................................................................................................................15
3.4 CHARGING..............................................................................................................................16
3.4.1 No charging display after plugging the charger in ............................................................16
3.4.2 Charging shown but not full charging................................................................................17
3.5 CTPKEYBOARD......................................................................................................................18
3.5.1 Abnormal operation of CTP keyboard ...............................................................................18
3.6 CALLING.................................................................................................................................19
3.6.1 No voice heard from the other side during the call ............................................................19
3.6.2 No voice heard from your side during the call ...................................................................20
3.7 POWER-ON FAILURE................................................................................................................21
3.8 LCD ON WHEN CLOSE TO THE EAR DURING THE CALL;LCD OFF WHEN AWAY FROM THE EAR.22
4. RADIO FREQUENCY (RF)...........................................................................错误!未定义书签。
4.1 SOFTWARE DOWNLOAD FAILURE .....................................................................错误!未定义书签。
4.2 PRODUCTION CALIBRATION..............................................................................错误!未定义书签。
4.2.1 AFC calibration.......................................................................................
错误
!
未定义书签。
4.2.2 AGC.........................................................................................................
错误
!
未定义书签。
4.2.3 APC .........................................................................................................
错误
!
未定义书签。
4.3 FAULT IN COMPLETE SET TEST/REWORK...........................................................错误!未定义书签。
4.3.1 Switch spectrum & PVT template with excessive standard .....................
错误
!
未定义书签。
4.3.2 High Frequency Error.............................................................................
错误
!
未定义书签。
4.3.3 High Phase Error....................................................................................
错误
!
未定义书签。
4.3.4 Power output problems ...........................................................................
错误
!
未定义书签。
4.4 WCDMAFORECAST.........................................................................................错误!未定义书签。
4.4.1 RSSI_Cal .................................................................................................
错误
!
未定义书签。
4.4.2 TPC_Cal..................................................................................................
错误
!
未定义书签。
4.5 WCDMACOMPREHENSIVE TEST......................................................................错误!未定义书签。
4.5.1 ACLR or SEM..........................................................................................
错误
!
未定义书签。
4.5.2 ILPC comprehensive test abnormal ........................................................
错误
!
未定义书签。
4.5.3 FrequencyErr ..........................................................................................
错误
!
未定义书签。
