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Flow Chart of Troubleshooting
9-8
9-4. Sim Part
Phone can't access SIM Card
Yes
C445="H"?
No
Check the SIM POWER
Yes
After Power ON,
Check USIM_CLK Signal on
pin15 of SIM400 in a few
second
Check the 32.768 kHz OSC300
No
Yes
After SIM card insert,
pin 13 of SIM400
=
"H(USIM_RST)"?
Replace PBA
No
Yes
Check the SIM Card
Yes
END