Sim Detect Trouble - LG GW520 Service Manual

5. Trouble shooting

5.5 SIM Detect Trouble

Checking Flow Checking Flow
Start Start Start
Change SIM Card Change SIM Card Change SIM Card
Work well? Work well? Work well?
Check soldering Check soldering Check soldering
of J200 of J200 of J200
Is 2V9_SIM(C223)3.0V? Is 2V9_SIM(C223)3.0V? Is 2V9_SIM(C223)3.0V?
Check TP1 Check TP1 Check TP1
Do SIM_CLK(C246), Do SIM_CLK(C246), Do SIM_CLK(C246),
SIM_IO(C248), SIM_RST(C245) SIM_IO(C248), SIM_RST(C245) SIM_IO(C248), SIM_RST(C245)
Work well? Work well? Work well?
Cleck TP2 Cleck TP2 Cleck TP2
END END END
SIM_CLK SIM_CLK SIM_CLK
SIM_RST SIM_RST SIM_RST
SIM_IO SIM_IO SIM_IO
LGE Internal Use Only
YES YES YES
NO NO NO
NO NO NO
YES YES YES
NO NO NO
YES YES YES
NO NO NO
YES YES YES
(R246) (R246) (R246)
(C245) (C245) (C245)
(C248) (C248) (C248)
GW520 service manual
END END END
Resolder J200 Resolder J200 Resolder J200
Check C223 or Check C223 or Check C223 or
Change U200 Change U200 Change U200
Change the main board Change the main board Change the main board
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Only for training and service purposes