Power On Trouble Shooting - LG -E730 Service Manual

4.9 Power ON Trouble shooting

Power On sequence of C660 is :
Power key press TP1 go to low
Phone booting and TP10 go to High
Battery voltage higher than
TP, TP3, TP4, TP5, TP6, TP7,
TP11:19.M / TP1:3.768kHz
LGE Internal Use Only
PM8058 Power Up
START
3.70V(OCV)?
Yes
TP1or TP10 high to low
when key press?
Yes
TP8, TP9 power up?
Yes
Is clock ok?
Yes
Redownload SW image
TP3, TP4, TP5, TP6, TP7, TP8, TP9 power ON
No
Change or charging the Battery
No
1. Check correctly working powerkey
No
Change the Main board
No
Change the Main board
- 11 - Copyright © 011 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
Only for training and service purposes