Luminance Sensor On/Off Trouble - LG GT810h Service Manual

4. TROUBLE SHOOTING

4.18 Luminance Sensor on/off trouble

Luminance Sensor is worked as below :
Sensor ALC function On
brightness of the display backlight. (Very slowly)
Obj ect mov ed at the Lum inan ce sensor
YES
LCD b acklight chang e (slowly)?
LGE Internal Use Only
→
Object moved at the Luminance sensor
Start
Sensor ALC function On
No
BL_ I2C_SDA / SCL output
YES
U501 GC1 / 2 sig nal outpu t
YES
Work well?
Yes
End
→
NO
Change the Main Board
NO
Change the Luminan ce sensor
U501
NO
Change the Main Board
Copyright © 2009 LG Electronics. Inc. All right reserved.
- 142 -
automatically controls
Only for training and service purposes