Proximity Sensor On/Off Trouble - LG GM750 Service Manual

4. TROUBLE SHOOTING

4.17 Proximity Sensor on/off trouble

Proximity Sensor is worked as below :
Send Key click Phone number click
Control the screen's on/off operation automatically
Object moved at the Proximity Sensor
YES
LGE Internal Use Only
Call connected
Start
Send Key click. Phone call
LCD Off
No
Folder Assy sensor
hole check
YES
R522 VREG_PROXI_2.6V
YES
U501 PROX_OUT
YES
Work well?
YES
End
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Object moved at the sensor
NO
Change the Folder
NO
Change the MAIN Board
NO
Change the sensor
U501
NO
Change the Main Board
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