Audio Authority CMX-144 User Manual 13
Appendix C: Troubleshooting
Symptom Causes and Solutions
No video
• Check that the correct input is selected on the zone
• Check that the video is connected to the correct Y Pb Pr inputs on the TV
• Check cables for damage
No analog audio
• Connect analog audio to the inputs and from the outputs of the CMX-144 – digital audio does not
produce sound on the analog audio outputs.
No digital audio
• If composite video is connected to any digital audio jacks, both digital audio pathways are disabled
Front panel
blinks
• Front panel is locked – use serial or IR commands to unlock the keyboard
IR does not
function properly
• If rear panel IR has been used, the optical IR receiver is automatically disabled – enable the
optical IR receiver via serial command [IRFE] or manually disconnect and connect power
• IR interference such as LCD/Plasma screen, fluorescent lights, space heater, sunlight
• Eliminate sources of IR interference and use Plasma-proof and/or LCD-proof IR receivers
• Experiment with relocating the IR receiver
• Incompatible IR receivers – use only 12 volt, three-wire receivers (see page 7)
Does not
respond to
RS-232
• CMX-144 commands not stored in remote control system – See Appendix A
• Wrong type of RS-232 cable – See specifications in Appendix A for proper cable pin-out
• Incorrect settings in software – See specifications in Appendix A
Ethernet port
does not respond
• IP address has been changed – reset to factory defaults, or use serial command via RS-232 port
to set new IP address (Appendix A)
Appendix D: Dual 4x4 Video Matrix Applications
The CMX-144 can be used with both component and composite video simultaneously. Using the
breakaway switching
feature, the resulting configuration behaves like two 4x4 video matrix switchers in one cabinet.
• Add four composite video sources connected to the digital audio inputs.
• The composite video outputs can be connected to standard definition video monitors (shown below), or they can be
connected to a composite video input on the HDTVs.
•
The component video signals have no audio channels switched with them
, while the composite video signals do
COMPOSITE
VIDEO SOURCES
COMPONENT
VIDEO SOURCES
STANDARD RESOLUTION
VIDEO DISPLAYS
HDTVS WITH
COMPONENT
VIDEO INPUTS
CMX-144
