Proximity Sensor On/Off Trouble - LG -P970 Service Manual

4.20 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
Send Key click & call connected
Object moved at the Proximity Sensor
Yes
No
Check PROXI_SDA /
SCL output & Prox_out
Yes
Yes
Measurement
PROXI_VCC
1.8V_VIO
PROXI_LEDA
PROX_OUT (TP3)
I2C3_SCL (TP1)
I2C3_SDA
(TP)
LGE Internal Use Only
Call connected
START
LCD off?
No
No
Work well?
END
Object moved at the sensor
Change the upper FPCB
Change the main board
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4. TROUBLE SHOOTING
Only for training and service purposes