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7-15. DCS Transmitter
TX ON (5Level)
Yes
U100 Pin8
>= 20dBm
No
U100 pin13
>= 18dBm
No
PAM100 pin14
>= 18dBm
No
PAM100 pin1
<= -11dBm
No
U102 pin2
<= -15dBm
No
U102 pin 6,7,8,9
>= 1V
No
Check U200
END
Yes
Resolder RFS100, C102,C103
Yes
Yes
Resolder L104, C139, C147
Yes
Yes
Resolder C150, L102,
Yes
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Check U100
pin10 = L
pin12 = H (2.68V)
No
Check PAM100
pin 3,4,5,6,7 OK?
No
C149, C146, R122
Check U102
pin23, 26, 31
>=2.7V
No
7-25
Flow Chart of Troubleshooting
Yes
Change or Resolder U100
Check ANT Switch
control circuit
Yes
Resolder or Change PAM100
Check +VBAT or PAM
control signal
Yes
Resolder U102
Check & Resolder RFLO
signal, RF13MHz,
RF PSU Part
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