Sim Part - Samsung SGH-X620 Service Manual

Flow Chart of Troubleshooting

7-4. Sim Part

Phone can' t access SIM Card
CN300 pin 1, 5 = " H " ?
After Power ON,
Check SIMCLK Signal on
CN300 pin3 in a few second
After SIM card insert ,
CN300 pin 2 = " H (SIM _ R ST) " ?
Check the SIM Card
Y e s
Y e s
Y e s
Y e s
Y e s
END
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No
Check the sim charge pump
No
No
7- 8
Check the 32k OSC
Replace PBA