Dcs Transmitter - Samsung SGH-J750 Service Manual

Flow Chart of Troubleshooting

9-12. DCS Transmitter

TX ON (5Level)
Yes
RFS100 pin19
≥ 25dBm
No
RFS100 pin22
≥ 25dBm
No
PAM100 pin17
≥ 25dBm
No
PAM100 pin1
≥ -4dBm
No
Check UCP200
END
Yes
Resolder RFC100,C131,L103
Yes
Yes
Resolder or Change L106
Yes
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VDD = H (2.5V),
VC1 = 1.5V
VC2, VC3= 0
Yes
Yes
Check PAM100
pin2,3,4,5,8 is ok?
No
9-20
No
Check ANT Switch
control circuit
Change or Resolder RFS100
Resolder or Change PAM100
Check VBAT or PAM
control signal