![background image](http://html.mh-extra.com/html/samsung/sgh-n600/sgh-n600_service-manual_1190929033.webp)
SGH-N600 Flow chart of trouble shooting
5-7
5-4 Sim Part
U110 pin4,6 = 3V ?
U110 pin5 = "H" ?
Check the circuit related to U110
END
Replace the PBA
Yes
No
No
U110 pin2,3 = 3V ?
CN106 pin1,7 = 3V ?
Replace U110
Resoldering CN106 and check open
connection from U110 to CN106
Yes
Yes
No
No
After Power ON,
Check SIMCLK Signal on CN106 pin 1
in a few second
After SIM card insert,
CN106 pin 2 = "H"(SIMRST) ?
Replace the PBA
Replace the PBA
Yes
Yes
No
No
Check the circuit around U118
(Serial EEPROM) and data stored in it
Yes
Phone can't access SIM card
Yes