Section 8
♦
Troubleshooting
102
CMN-41 Series Installation and Operation Handbook
Copyright © 2009, Harris Corporation
Table 8-1. CMN-41: Problems, Causes, and Solutions
Problem/Symptom
Possible Cause
Solution or Explanation
Waveform not locked when
External Reference (Ref:EXT)
is selected
The video signal is too low in
amplitude or the sync edge is too
noisy.
Verify that the External Reference
signal is of sufficient amplitude.
EXT REF is selected but there is
no reference input, or the External
Reference is non-synchronous.
Select Internal Reference (INT
REF) and/or verify that the
External Reference signal is
synchronous.
No sound on headphone
output
The headphone volume is set too
low or the output is set to “Mute”
in the Audio Mapping Matrix.
Adjust the headphone volume or
select the proper channel to be
monitored in the Audio Mapping
Matrix.
Audio level reading too low
The input reference level is not
correctly set.
Use the SETUP MENU to check
the input reference level setting.
Picture width not correct
The aspect ratio is not set
correctly.
Change aspect ratio in the setup
menu.
No communications on
Ethernet port
The IP address is incorrect.
Provide the correct IP address in
setup menu.
Incorrect Ethernet cable
For a direct connection, use a
crossover cable. For a network
connection, use a standard
Ethernet cable.
If the problem still exists after troubleshooting the CMN-41, see “Service and Support”
on page 6 for further instructions.
