Table of Contents
Advertisement
Flow Chart of Troubleshooting
9-1-3. Sim Part
Phone can't access
SIM card
Check the pin 1 of
SIM300
Voltage = 3V
YES
Check the SIM
connector's
(SIM300)
connector's to SIM
card
YES
Check the circuit around SIM300
input circuitry
YES
Check the circuit around
U300 output
and voltage supply circuitry
YES
END
NO
NO
NO
NO
9-6
①
Check the circuit related to
U300
②
resolder or change
SIM300
③
Check the related circuit of
SIM300
④
Check the related circuit of
U300
Advertisement
Table of Contents
