Dcs/Pcs Transmitter - Samsung GT-S3850 Service Manual

Level 3 Repair

8-3-15. DCS/PCS Transmitter

TX Power is too Low!!
TX ON (5Level)
CLOCK CHECK?
26MHz @ OSC200
YES
PAM100 pin27 ≥ -4
dBm
(R100 using spectrum
analyzer)
YES
Check the Voltage
C103, C104 < 3.3V?
YES
PAM100 Pin11 ≥
30dBm
(L104 using spectrum
analyzer)
YES
Check the RFS100
connection with PCB?
YES
Antenna
re-solder or change
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NO
Re-solder OSC200
NO
Re-solder or change
UCP200
NO
Check the UCP200 & VBAT
circuit.
NO
Resolder PAM100
NO
Resolder RFS100.
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