3. TROUBLE SHOOTING
- 100 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3.9 Power
Battery voltage higher than 3.4V?
START
Press PWR Key
VA11000’s signal change from high
to low?
Change the main board
END
Signal of Q5000 is #3 pin is low, while
phone boot?
Check the voltage at C5056. Is it
Battery voltage?
Is it normal voltage?
Is the X5000 signal normal?
Check it’s 19.2Mhz
Is the signal high at R5006
Phone doesn’t boot yet?
Check PM8038’s SMPS voltage level?
Change or charging the Battery
Change Q5000
Change X5000
Change SW11001
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes