4. TROUBLE SHOOTING
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Only for training and service purposes
LGE Internal Use Only
4.20 Illumination Sensor on/off trouble
Illumination Sensor is worked as below:
Menu Key click Settings click Display click Brightness click Automatic brightness click
Start
Automatic brightness click
Hide illumination sensor
by hand
Change F_
ONKEY FPCB
Change AP
main board
The END
LCD brightness
Change?
Check AMB3-3V(TP1)
and I2C CLK(TP2)
ALS works
Well?
No
No
No
Yes
Yes
Yes
Measurement
Ambient sensor voltage (3.3V)
Sensor I2C clock
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