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Flow Chart of Troubleshooting
9-32
9-17. DCS Transmitter
Check & Resolder
RF PSU Part
Yes
No
Resolder F800
Check all voltage
sources of F800
>=2.8V
Check +VBAT or PAM
control signal
Yes
Resolder or Change PAM800
No
UPL802 Pin8
>= 20dBm
Resolder RFS00,C806
TX ON (5Level)
Check UPL802
pin13 = L
,pin14 = H
UPL802 pin15
>= 20 dBm
PAM800 pin 10
>= 20 dBm
PAM800 pin11
> = 3dBm
Change or Resolder
UPL802
Check ANT Switch
control circuit
Resolder C854,C855,L801
or Change PAM800
F800 pin 4,5,6,7
>= 1V
Yes
Check PAM800
+VBAT(pin4) OK?
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
END
Check UME702
Yes