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Flow Chart of Troubleshooting
3-7
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3-1-3. Sim Part
Check the voltage at pin#1
of SIM103 >= 2.8V ?
"Insert SIM is displayed on the LCD
Check the SIM connector's
(SIM103) connection to
SIM card
Check the
UCP301
Resolder or change
SIM601
END
No
Yes
Yes
Yes
Yes
No
No
Is there any signals
pin#2,#3,#4 of SIM103 ?
Check the
UCP301
Check the SIM Card