Samsung GT-B3410 Service Manual page 51

9-13. GSM850,900 Transmitter
TX ON (5Level)
Yes
U103 PIN10
≤ 30dBm
No
PAM100 pin4
≥ 2dBm
No
U103 pin 27,28,29,30
≥ 0.2Vp_p
No
Check U200
END
Yes
Resolder RFS100, L100, L101, L102,
Yes
Yes
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C103, C181
Check PAM100
PIN8 = H (2.6V),
PIN9 = L
Yes
U103 pin
4,6,7,12,26,32,34 ≥
2.8V
Yes
9-23
Flow Chart of Troubleshooting
No
Check ANT Switch
control circuit
Change or Resolder PAM100
No
Check & Resolder
C127,C128,C138
Resolder U103