Extron Electronics MAV Series - Manual (Page 40)

Operation, cont’d
MAV Series Switchers • Operation 3-16
If another input button is pressed and released, the level value for the current
input is saved and the level value for the newly selected input is displayed.
E
Press and release the Audio button. The Audio LED stops blinking and the
View (
) LED (if lit), the Esc ( ) LED (if lit), the selected input LED, and all
output LEDs turn off.
Both the Video and Audio LEDs light.
Executive mode (front panel security lockout)
The executive mode limits the operation of the MAV switcher from the front panel.
When the switcher is in executive mode, all of the front panel functions are
disabled except for the view-only mode functions. See Viewing a configuration on
page 3-8. 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 MAV series switcher, 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.