Table of Contents
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Flow Chart of Troubleshooting
10-1-3. Sim Part
Phone can't access
Check the pin 1 of
Check the SIM
connector's to SIM
Check the circuit around SIM600
Check the circuit around
and voltage supply circuitry
SIM card
SIM600
Voltage = 3V
YES
connector's
(SIM600)
card
YES
input circuitry
YES
UCP300 output
YES
END
NO
NO
NO
NO
10-8
①
Check the circuit related to
UCP300
②
resolder or change
SIM600
③
Check the related circuit of
SIM600
④
Check the related circuit of
UCP300
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Table of Contents
Troubleshooting
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