User manual
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, uorescent 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 specications in Appendix A for proper cable pin-out
• Incorrect settings in software – See specications 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 conguration 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 denition 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