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Flow Chart of Troubleshooting
9-24
9-16. WCDMA Transmitter
END
Check UCP600
Check VBAT or PAM
control signal
No
Change or Resolder RFS100
Yes
RFS100 pin19
≥ 23dBm
Resolder RFC100,C131,L103
TX ON (5Level)
VDD = H (2.5V),
VC1,VC3 = 1.5V
VC2, = 0
RFS100 pin17
≥ 23dBm
DUF302
≥ 23dBm
PAM303 pin8
≥ -5dBm
Check ANT Switch
control circuit
Resolder or Change C118
Yes
Check PAM303
pin2,3,4,5,8 is ok?
Resolder or Change PAM303
No
No
No
No
Yes
Yes
Yes
Yes
No
Yes
No
Yes
F303 pin8
≥ -5dBm
Resolder or Change L310, L312