Samsung GT-S5230 - GSM850 Receiver

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Flow Chart of Troubleshooting
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9-19
9-13.
GSM850 Receiver
RX ON
Cell Power
:-60
dBm
①
Yes
U100 Pin
17
≥
-
65
dBm
No
Resolder U100
,
L105, C116
Yes
Check ANT Switch
control circuit
U100 VC1, VC2
≥
-68
dBm
Check
U100
pin
10,
pin
16 = L
No
No
②
Resolder
U100
Yes
③
U100
pin
13
≥
-70
dBm
pin
5,6
≥
-70
dBm
Yes
No
Resolder L119, L123, L120,
C126
Check UCP200
END