Motorola Commercial CM Series - Troubleshooting Flow Chart for Receiver (Sheet 2 of 2)

Troubleshooting Flow Chart for Receiver RF (Sheet 1 of 2) 3-3
1.1 Troubleshooting Flow Chart for Receiver (Sheet 2 of 2)
3V
(IFIC -Vcc)
OK ?
Installation
OK ?
Yes
Yes
No
No
A
From
Check visually
all receiver
components
installation ?
Inject - 40dBm (CW)
to RF connector
Check Power on
C335
RF
Power
> -28 dBM
?
Yes
No
Check Power on
C337
Go to
DC Section
Check
the component
Antenna to Mixer
circuitry problem
Replace
Q303, Q301
Check passive
components
RF
Power
> -28 dBM
?
Yes
No
Replace
Q305, Q300, U302
Check passive
components
Check Y301
44.395 MHz
Y301
OK
?
Yes
No
Replace Q302, Y300
Check D301 - 304
Replace Y301
3V to
U301
OK
?
Yes
No
Replace U300
Go to DC Section