Proximity Sensor On/Off Trouble - LG -P940 Service Manual

4.20 Proximity Sensor on/off trouble

Proximity Sensor is worked as below:
Send Key click -> Phone number click -> Call connected -> Object moved at the sensor -> Control the screen's on/off
operation automatically
Change the vt_cam fpcb
No
LGE Internal Use Only
START
Send Key click & Phone number click
& Call connected
Object moved at the
Proximity sensor
LCD off?
No
Check TP1 & IC3_SDA & SCL
& TP Output
Output work well?
No
Change the main board
Function is OK?
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4. TROUBLE SHOOTING
Yes
END
Yes
END
Yes
END
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