- 82 -
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
4.3 SIM Detect Trouble
y
SIM control path
- Asta generates SIM interface signals(1.8V level) to AB3000.
- AB3000 converts SIM interface signals to 2.75V.
SIM work well?
Finish
Yes
Finish
Yes
START
Yes
Reconnect SIM card
Resolder J201 on main PCB
and check the contact
between J201 and SIM card
Change main board
SIM work well?
Finish
N
o
N
o
SIM work well?
N
o
Change SIM card
< SOCKET PCB - SIM Connector >
J201
Содержание TU750
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