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Flow Chart of Troubleshooting
7-26
15. DCS Transmitter
U100 Pin7
>= 20dBm
Resolder RFS100, C102, L106
TX ON (5Level)
Check U100
pin2, pin4 = L,
pin8 = H
U100 pin9
>=18dBm
PAM100 pin18
>= 18dBm
U102 pin2
>= -15dBm
PAM100 pin5
>= -11dBm
Change or Resolder U100
Check ANT Switch
control circuit
Resolder L115, C135
Resolder R116, R117, R118, C147, L117, C138, C132
U102 pin7, 8, 9, 10
>= 1V
Yes
Check PAM100
+VBAT,
pin2,3,13,14 OK?
Resolder or Change PAM100
Check +VBAT or PAM
control signal
Check U102
pin23, 26, 31
>= 2.7V
Check & Resolder RFLO
signal, RF26MHz,
RF PSU Part
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
END
Check U200
Resolder U102
Yes