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Flow Chart of Troubleshooting
10-22
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10-1-4 Sim Part
Check the voltage
at pin#1 of SIM701
>= 3.0V ?
"Insert SIM is displayed
on the LCD
Check the SIM
connector's (SIM701)
connection to SIM
card
Check the U401
Resolder or change SIM701
END
No
Yes
Yes
Yes
Yes
No
No
Is there any
signals pin#2,#3,#4
of SIM701 ?
Check the U401
Check the SIM Card
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