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Flow Chart of Troubleshooting and Circuit Diagrams
3-1-3. SIM Part
Initial Failure
YES
Check the pin #1 of SIM300
Voltage=3V
YES
Check the SIM connector's to
SIM Card
Check the related circuit of SIM300
Check the circuit around U300 output and
voltage supply circuit
END
NO
YES
YES
YES
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Check the circuit related to UCD300
NO
Resolder or Change SIM300
NO
Check the related circuit of SIM300
NO
Check the related circuit of UCD300
3-8
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