
CMN-91
Installation and Operation Manual
Troubleshooting
© 2016 Imagine Communications Corp. Proprietary and Confidential.
Revision D | Page 149
Troubleshooting
CAUTION: These instructions are for use by qualified personnel only. To reduce the risk of electric shock,
do not perform this installation or any servicing unless you are qualified to do so. Refer all servicing to
qualified service personnel.
Initial Checks
If the CMN-91 is not functioning properly, first verify the following:
The CMN-91 is connected to a power source (11-17 VDC).
All cables are correctly connected (see Connecting the CMN-91 (on page 32)).
Initial difficulties with operation or display can be due to improper setup. Review the Setup menus (see
Setup Menu Functions (on page 103)) to ensure that the proper adjustments have been made for the
signal requirements.
Restarting
If a problem persists after the cables are correctly connected and the unit is set up, restart the unit by
doing the following:
1.
Push and hold the SETUP button, Up/Down knob, and Left/Right knob for a minimum of five
seconds until the SYSTEM RESET message appears on the display.
2.
Press and hold the ENT button to reset the unit’s configuration. All front panel and Setup menu
selections will be reset to the factory default settings.
3.
Press and hold the PRST button to restart the unit.
The unit reboots. All front panel and Setup menu selections are reset to the factory default settings.
Problems, Causes, and Solutions
Problem/Symptom
Possible Cause
Solution or Explanation
Unit does not turn on when
power button is pressed.
Battery power is low and no AC
power is present.
Connect a charged battery or connect
the AC power.
No display on external XGA
monitor.
The monitor is not plugged in or
powered up.
Check to see that the monitor is plugged
in and powered up.
Display on external XGA
monitor is not centered.
The XGA monitor is not correctly
adjusted.
Use the monitor controls to center the
display.