Proximity Sensor On/Off Trouble - LG CT815 Service Manual

4. TROUBLE SHOOTING

4.16 Proximity Sensor on/off trouble

Proximity Sensor is worked as below :
→
Send Key click Phone number click
the screen's on/off operation automatically
YES
LGE Internal Use Only
→
Call connected
Start
Send Key cl ick. Phone call
Obj ect mov ed at th e Pro ximit y Sensor
LCD on/off?
No
PROX_LEDON (TP504) output ?
YES
PROX_ADC signal output
YES
Work well?
Yes
End
→
Object moved at the sensor
NO
NO
NO
Change the Main Board
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Control
Change the Main Board
Change the IrDA sensor
U504
Only for training and service purposes