Illumination Sensor On/Off Trouble - LG -V909DW Service Manual

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
Yes
Measurement
Ambient sensor voltage (3.3V)
Sensor I2C clock
LGE Internal Use Only
Start
Automatic brightness click
Hide illumination sensor
by hand
LCD brightness
Change?
No
Check AMB3-3V(TP1)
and I2C CLK(TP2)
Yes
ALS works
Well?
Yes
The END
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4. TROUBLE SHOOTING
No
Change F_
ONKEY FPCB
No
Change AP
main board
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