SGH-P730 Flow Chart of Troubleshooting and Circuit Diagrams
2-
5
3. Sim Part
* Test with Sim
Check the pin 1 of
CN104. voltage 3V?
Phone can't access SIM card
Check the SIM
connector's (CN104)
connection to SIM
card
Check the circuit related to U101
Resolder or change CN104
END
No
Yes
Yes
Yes
No
Check the circuit
around CN104 input
circuitry
Check the related circuit of CN104
Yes
No
Check the circuit
around U401 output
and voltage supply
circuitty
Check the related circuit of U401 and
U101
Yes
No