Proximity Sensor On/Off Trouble Shooting - LG -P715 Service Manual

4.23 Proximity Sensor on/off Trouble Shooting

Proximity Sensor is worked as below :
Call connected -> Object moved at the sensor -> Control the screen's on/off operation automatically
Call Connected & Object moved at the
Yes
Measurement
VREG_MSME_1.8V
VREG_P3_2.85V
PROX_OUT
PROX_I2C_SCL / SDA
LGE Internal Use Only
START
proximity Sensor
LCD off?
No
Check PROX_12C_SDA/SCL
Output & Prox_out
Yes
Work well?
Yes
END
No
Change the Proximity Sensor(U7001)
No
Change the Main Board
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4. TROUBLE SHOOTING
Only for training and service purposes