LG -T370 Service Manual page 105

4. TROUBLE SHOOTING
Proximity Sensor is worked as below :
Call connected -> Object moved at the sensor -> Control the screen's on/off operation automatically
START
Call Connected & Object moved at
Proximity Sensor
Yes
LCD OFF?
No
No
Change the Proximity
Check IC_SCL/SDA & PROX_INT
Sensor (U501)
Yes
Yes
No
Work Well?
Change the Main board
END
Measurement
VREG_MSME_1.8V
VREG_PROX_.6V
PROX_OUT
PROX_IC_SCL / SDA
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