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Flow Chart of Troubleshooting
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9-9
9-4. Sim Part
T/SIM500 pin 11, 14
or R525 = "H" ?
Phone can't access SIM Card
Resolder R525, C529, C530, and C409
Check the SIM Card
END
No
Yes
Yes
Yes
No
Resolder or Replace T/SIM500
After Power ON,
Check SIMCLK Signal on
pin15 of T/SIM500 in a few
Yes
No
Replace PBA
After SIM card insert,
T/SIM500 pin 13 =
"H(SIM_RST)"?
Yes