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SGH-N620E Flow Chart of Troubleshooting
4. Sim Part
Phone can't access SIM Card
U105 pin 4 = 3.0 V?
U105 pin 5 = "H" ?
U105 pin 2,3 = 3.0 V ?
After power on, check SIMCLK
signal on CN101 pin 3 in a few
After SIM card insert, CN101 pin
2 = "H" (SIMRST)?
Check the circuit around U208 (Serial EEPROM)
and datad stored in it
Yes
Yes
Yes
seconds
Yes
Yes
END
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
No
Check the circuit around U102
No
Replace U105 or replace PBA
No
No
Resoldering C108 or Replace
No
7-7
Replace U105
Replace PBA
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