Samsung GT-S5230 Service Manual page 39

9-13. GSM850 Receiver
RX ON
Cell Power : -60dBm
Yes
U100 Pin17 ≥ -
65dBm
Yes
U100 VC1, VC2
≥ -68dBm
Yes
U100
pin 13 ≥ -70dBm
pin 5,6 ≥ -70dBm
Check UCP200
END
①
No
Resolder U100, L105, C116
No
③
No
Resolder L119, L123, L120,
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Check U100
pin10,pin16 = L
Yes
C126
9-19
Flow Chart of Troubleshooting
No
Check ANT Switch
control circuit
②
Resolder U100