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Flow Chart of Troubleshooting
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7-7
7-3. Sim Part
SIM500 pin 1 = "H"?
Phone can't access SIM Card
Check the SIM POWER
Check the SIM Card
END
No
Yes
Yes
Yes
No
Check the 32KHz OSC501
After Power ON,
Check SIM_CLK Signal on
TP506 in a few second
Yes
No
Replace PBA
After SIM card insert,
TP507 = "H(SIM_RST)"?
Yes
