Sim Part - Samsung SGH-R200 Service Manual

5-4 Sim Part

Phone can't access SIM card
Q102 pin4 = 3.0 V ?
Q102 pin 2, 3 = 3.0 V ?
Check SIMCLK Signal on CN102 pin 3
After SIM card insert,
CN102 pin 2 = "H(SIMRST) ?
Check the circuit around U113
(Serial EEPROM) and data stored in it
Flow Chart of Troubleshooting and Circuit Diagrams
Yes
Yes
Q102 pin5 = "H" ?
Yes
Yes
After Power ON,
in a few second
Yes
Yes
END
No
Check the circuit around U103
No
Replace Q102 or
Replace PBA
No
Replace Q102 or
Resolder C132
No
Resoldering C193 or
Replace PBA
No
Resoldering C192 or
Replace PBA
5-7