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Flow Chart of Troubleshooting
9-10
9-4. Sim Part
Phone can't access SIM Card
Yes
C740="H"?
No
Check the SIM POWER
Yes
After Power ON,
Check USIM_CLK Signal on
pin15 of SIM700 in a few
second
Check the 32.768 kHz OSC400
No
Yes
After SIM card insert,
pin 13 of SIM700
=
"H(USIM_RST)"?
Replace PBA
No
Yes
Check the SIM Card
Yes
END
Summary of Contents for SGH-F490
Page 79: ...8 PCB Diagrams 8 1 1 Main top ...
Page 80: ...PCB Diagrams 8 2 2 Main bottom ...
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