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Flow Chart of Troubleshooting
9-4. Sim Part
Phone can't access SIM Card
Check the SIMVCC = 3.0V
Check the SIM connector's
connector's to SIM card
Check the circuit around SIM300
Yes
Yes
Yes
input circuitry
Yes
END
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①
No
Check the circuit related to
②
No
resolder or change
③
No
Check the related circuit of
9-7
R311, C340
SIM300
SIM300
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