Proximity Sensor On/Off Trouble Shooting - LG -E510 Service Manual

4.14 Proximity Sensor on/off Trouble Shooting

Proximity Sensor is worked as below :
Send Key click → Phone number click → Call connected → Object moved at the sensor →
Control the screen's on/off operation automatically
Object moved at the Proximity Sensor
Yes
Measurement
VREG_MSMP_.6V
VREG_PROX_.6V
PROX_OUT
PROX_IC_SCL / SDA
LGE Internal Use Only
START
Send Key click & call connected
LCD off?
No
Check PROXI_SDA /
SCL output & Prox_out
Yes
Work well?
Yes
END
No
Change the Proximity Sensor U70
No
Chang the main board
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4. TROUBLE SHOOTING
Only for training and service purposes