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Flow Chart of Troubleshooting
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9-7
9-4. Sim Part
SIM300 pin 1 is "High"?
Phone can't access SIM Card
Check the circuit related to SIM300
Check the SIM Card
END
No
Yes
Yes
Yes
No
Check the UCP200 or Change the PBA
SIM300 pin15 (SIMCLK) is
working?
Yes
No
Check the UCP200 or Change the PBA
After SIM card inserted,
SIM300 pin 13(SIMRST) is
"High"?
Yes