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Flow Chart of Troubleshooting
9-6
9-4. Sim Part
CN400 pin 11,14 = "H"?
After Power ON,
Check SIMCLK Signal on
pin15 of CN400 in a few
second
After SIM card insert,
CN400 pin 13 = "H(SIM_RST)"?
Phone can't access SIM Card
Check the sim charge pump
Check the SIM Card
END
No
Yes
Yes
Yes
No
Check the Clock
Yes
No
Replace PBA
Yes
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