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Flow Chart of Troubleshooting
9-24
9-15. DCS Transmitter
TX ON (0Level)
Resolder C219, L216, C217
Check ANT Switch
control circuit
Change
or Resolder
MODULE200
Yes
Resolder CN201, C209
END
Check U300
U100 Pin6, 7, 8, 9
>= 500mV
OSC100 pin5
>= 6Bm
U200 Pin3
>= 3dBm
U200 Pin15
>= 20dBm
MODULE200 Pin13
>= 20dBm
>= 20dBm
MODULE200 Pin8
>= 20dBm
No
Check
MODULE200
pin9=L,pin12=H
Yes
Yes
No
No
Yes
No
Check U200
+VBATT(pin17) OK?
Yes
Yes
Resolder or change U200
or check PAM control
signal
No
No
Check +VBATT
Yes
Resolder R205
No
Check U100
pin4 >= 4.0V
pin22, 28 >= 2.7V
Yes
Yes
Check & Resolder
RF PSU part
No
No
Resolder U100
or check Txcpo(R112)