Extron Electronics Matrix 50 Series - Manual (Page 35)

3-15 Matrix 50 Series Switchers • Operation
on page 3-7. Other than in view-only mode, if the user pushes a front panel
button when the switcher is in executive mode, that button’s associated LED
flashes twice and goes out.
To toggle executive mode on or off, press and hold the Video and Audio buttons
for approximately two seconds. The Video and Audio LEDs blink twice to
indicate the mode change. Release the Video and Audio buttons. To toggle the
executive mode state again, press and hold the Video and Audio buttons again.
System reset to factory defaults
To reset the switcher to the factory default settings, press and hold the Esc button
on the front panel while AC power is being applied. Continue to hold the Esc
button until the power-up sequence is completed (all LEDs turn off, the Video
and Audio LEDs turn on, and the Esc LED blinks). System reset clears all ties
and presets, and sets all audio gain levels to unity gain (+0dB).
Troubleshooting
This paragraph gives recommendations on what to do if you have problems
operating the Matrix 50, and it provides examples and descriptions for some
image problems you may encounter.
General checks
1 . Ensure that all devices are plugged in and powered on. The switcher is
receiving power if one of the input LEDs is lit.
2 . Ensure an active input is selected for output on the switcher.
3 . Ensure that the proper signal format is supplied.
4 . Check the cabling and make corrections as necessary.
5 . Call the Extron S 3 Sales & Technical Support Hotline if necessary.
Plasma display S-video problem
Extron has encountered a problem with the S-video output by some video
conference codecs. Some codecs change the DC offset on the chrominance (C) so
that it is very different from the level on the luminance (Y). This can cause a
plasma display to come up in the wrong size mode.
With the matrix switcher taken out of the system, the plasma works fine. It looks
like a Extron problem, but it is not. The matrix switcher boosts the bad codec
output, which makes the plasma go to the wrong setting.
Solution : Try placing an Extron video DC block adapter, part #26-495-01, on the
luminance (Y) input to the switcher from the codec.
Worksheets
Rather than trying to remember the configuration for each preset, use worksheets
to record this information. Make copies of the blank worksheet on page 3-19 and
use one for each preset configuration. The forms accommodate all Matrix 50
Series switcher configurations. Cross off all unused or inactive inputs and
outputs. Use different colors for video and audio.