Samsung SGH E250 Service Manual - Page 42

Sim Part

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9-4. Sim Part Phone can't access SIM Card Yes SIM400 pin 1,5 = "H"? Yes After Power ON, Check SIMCLK Signal on pin3 of SIM400 in a few second Yes After SIM card insert, SIM400 pin 2 = "H(SIM_RST)"? Yes Check the SIM Card Yes END Flow Chart of Troubleshooting No Resolder or replace U403 No Check the Clock No Replace PBA 9-7 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization

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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 U403
Check the SIM Card
END
No
Yes
Yes
Yes
No
Check the Clock
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