LG KG280 Service Manual - Page 63
U400 is 2.8V ?
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4. TROUBLE SHOOTING CHECKING FLOW START Does the LCD itself Has no trouble ? YES Change the camera module, Does it work properly ? YES Itís camera module's problem Replace the camera module NO Go to the LCD trouble NO NO Check the voltage of pin 3 of U400 is 2.8V ? YES Check the voltage of pin 1 of U400 LOW ? YES Replace the U400 Check the signals of the FL201~FL203 YES NO Replace FL201~FL203 Camera will work properly LGE Internal Use Only - 64 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 64 -
START
Does the LCD itself
Has no trouble ?
YES
NO
Replace the U400
Change the camera
module, Does it work
properly ?
YES
Itís camera module's problem
Replace the camera module
Check the voltage
of pin 3 of
U400 is 2.8V ?
YES
Check the signals of the
FL201~FL203
YES
Camera will work properly
NO
Check the voltage
of pin 1 of
U400 LOW
?
NO
YES
Go to the LCD trouble
Replace
FL201~FL203
NO
CHECKING FLOW