Proximity Sensor On/Off Trouble - LG -P895 Service Manual

4.21 Proximity Sensor on/off trouble

Proximity Sensor is worked as below:
Send Key click -> Phone number click -> Call connected -> Object moved to/from the sensor -> Control the screen's on/
off operation automatically
LGE Internal Use Only
START
Send Key Click & call connect
LCD Off?
No
Check PROXI_3.0V (TP1)
Is it OK?
No
Change the LDO
Check INT (TP2),
I2C_SCL (TP3), I2C_SDA (TP4)
IS it OK?
No
Change the mina board
Work well?
Change the Main board
END
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4. TROUBLE SHOOTING
Yes
Yes
Only for training and service purposes