C173 - Samsung GT-B3410 Service Manual

Flow Chart of Troubleshooting
9-17. DCS, PCS Transmitter
TX ON (0Level)
Yes
U103 PIN11
≥ 25dBm
No
PAM100 pin2
≥ 25dBm
Yes
U103 pin 27,28,29,30
≥ 0.2Vp_p
Yes
Check U200
END
Yes
Resolder L103, C169, C173
Yes
No
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Check PAM100
PIN8 = H (2.6V),
PIN9 = H
Yes
U103 pin 4,6,7,12,26,
32,34 ≥ 2.8V
pin 10 ≥ 1.8V
Yes
9-26
No
Check ANT Switch
control circuit
Resolder PAM100
No
Check & Resolder
C127,C128,C138
Resolder U103