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Flow Chart of Troubleshooting
9-6
9-4. Sim Part
SD500 pin 11, 14 = "H"?
Phone can't access SIM Card
Resolder or replace U406
Check the SIM Card
END
No
Yes
Yes
Yes
No
Replace UCP201
After Power ON,
Check SIM_CLK(SD500 pin 15)
= 32.768kHz ?
Yes
No
Replace PBA
After SIM card insert,
SD500 pin 13 = "H(SIM_RST)"?
Yes