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Flow Chart of Troubleshooting
10-8
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10-1-3. 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 U107
Resolder or change SIM103
END
No
Yes
Yes
Yes
Yes
No
No
Is there any signals
pin#2,#3,#4 of SIM103 ?
Check the U107
Check the SIM Card
①
③
②