- 158 -
LGE Internal Use Only
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
4. Trouble Shooting
(BB)
Proximity Sensor is worked as below :
Send Key click
Î
Phone number click
Î
Call connected
Î
Object moved at the sensor
Î
Control the screen’s on/off operation automatically
Send Key click & call connected
Object moved at the Proximity Sensor
LCD on/off?
No
Start
End
Yes
NO
Change the Main Board
4.20 Proximity Sensor on/off trouble
YES
Work well?
TP1 output check
NO
Change the sensor
(U300)
TP2, TP3, TP4 check
NO
Change the Main Board
YES
YES
158P
Change the Sub Board