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LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
Luminance Sensor is worked as below :
Sensor ALC function On
Î
Object moved at the Luminance sensor
Î
automatically controls brightness of the display backlight. (Slowly)
4.18 Luminance Sensor on/off trouble
Sensor ALC function On
Object moved at the Luminance sensor
LCD backlight change (slowly)?
No
Start
End
Yes
NO
Change the Main Board
YES
Work well?
U503 GC1 / 2 signal output
NO
Change the Luminance sensor
U503
BL_I2C_SDA / SCL output
NO
Change the Main Board
YES
YES