Gsm Transmitter - Samsung SGH-F480i Service Manual

9-10. GSM Transmitter

TX ON (5Level)
Yes
FEM100 pin2
≥ 30dBm
No
FEM100 pin11
≥ 30dBm
No
PAM201 pin11
≥ 30dBm
No
PAM100 pin7
≥ -4dBm
No
Check UCP300
END
Yes
Resolder FEM100,C103,L102
Yes
Yes
Resolder or Change R120
Yes
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VDD = H (2.8V),
CTRL1, CTRL2 = H,
CTRL3, CTRL4 = l
Yes
Yes
Check PAM100
pin2,3,4,6 is ok?
No
9-15
Flow Chart of Troubleshooting
No
Check ANT Switch
control circuit
Change or Resolder
FEM100
Resolder or Change PAM100
Check VBAT or PAM
control signal