SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
This Document can not be used without Samsung's authorization
9-7
9-4. Sim Part
SIM400 pin 1,5 = "H"?
Phone can't access SIM Card
Resolder or replace SIM400 and U401
Check the SIM Card
END
No
Yes
Yes
Yes
No
Check the Clock ( pin A16 at UCP200 )
After Power ON,
Check SIMCLK Signal on
pin3 of SIM400 in a few second
Yes
No
Replace PBA
After SIM card insert,
SIM400 pin 2 = "H(SIM_RST)"?
Yes