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Flow Chart of Troubleshooting
9-4. Sim Part
Phone can't access SIM Card
Yes
No
C548, C550 = "3.0V"?
Check the PMIC(U401)
Yes
After Power ON,
No
Check SIM_CLK Signal on
Check the SIM Clock
pin11 at HDC500
Yes
No
After SIM card insert,
HDC500 pin 13
Resolder HDC500 or replace PBA
= "H(SIM_RST)"?
Yes
Check the SIM Card
Yes
END
9-11
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