C133 - Samsung GT-B3410 Service Manual

9-11. GSM900 Receiver
RX ON
Cell Power : -60dBm
Yes
PAM100 PIN15
≥ -65dBm
Yes
F101 Pin 8, 9
≥ -68dBm
Yes
U103
pin 17 ≥ -70dBm
pin 18 ≥ -70dBm
Yes
U103 pin 27, 28, 29,
30
≥ 0.2Vp_p
Yes
Check U200
END
No
Resolder RFS100, L100, L101, L102,
No
No
Resolder C118, C120, L107
No
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C103, C181
Check PAM100
PIN1 = L
Yes
U103 pin 4, 6, 7, 12
≥ 2.8V
Yes
9-21
Flow Chart of Troubleshooting
No
Check ANT Switch
control circuit
Resolder PAM100
No
Check & Resolder
C127,C128,C138
Resolder U103