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LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4.3 SIM Detect Trouble
••
SIM control path
- Asta generates SIM interface signals(1.8V level) to Veronica.
- Veronica converts SIM interface signals to 3V.
4. TROUBLE SHOOTING
SIM work well?
Finish
START
Yes
Reconnect SIM card
Resolder J400 on main PCB
and check the contact
between J400 and SIM card
Change main board
SIM work well?
Finish
Yes
N
o
N
o
SIM work well?
Finish
Yes
N
o
Change SIM card
< Main Board - Bottom side >
J400
J400