Extron Electronics MLS 406SA - Manual (Page 33)

3- MLS 304 Series, MLS 406 Series • Operation and Setup
PRELIMINAR
Y
Troubleshooting
Power on the input and output devices and the switcher. The image should appear
on the screen, and sound should be audible.
If the image does not appear or there is no sound
1 . Ensure that all devices are plugged in and receiving power. The switcher’s
power LED ( ) lights if the it is receiving power and an active sync signal.
2 . Check the cabling, connector wiring, and grounding, and make adjustments
as needed.
3 . To test the system setup and output, substitute a video or audio/video test
generator for one of the input devices.
4 . Use the control software or a control system to verify that the audio and/or
video is not muted or set to input 0.
5. If no signal is being output from the Monitor Out port, check which Monitor
Out mode has been selected. You may need to change the setting to another
mode to obtain the desired output. See pages 3-7, 3-8, and 4-10.
6. Call the Extron S 3 Sales and Technical Support Hotline if needed.
If the switcher does not respond to controls
1 . Executive mode 1 or 2 may be active. To disable either executive mode, press
and hold input buttons 1 and 4 for 3 seconds, then release them when the
input LEDs blink. Executive modes can also be disabled via RS-232 control.
2 . Via RS-232 verify that the configurable inputs (inputs 3 and 4 on the
MLS 304MA or MLS 304SA; inputs 4, 5, and 6 for the MLS 406/MLS 406MA/
MLS 406SA) have been set up for the correct input type (RGB or composite
video).
3. If audio input 0 (audio mute) is selected (via RS-232), rotating the Volume
knob does not affect the volume, since an active audio input is not selected.
Select an active audio input.
4. If you have just updated the switcher’s firmware (see chapter 4, Serial
Communication ), and the power LED lights but the switcher does not respond
to front panel input selections or volume adjustments, you may need to reset
the unit to factory defaults (see page 3-4, Resetting the switcher, or page 4-6, Zap
command ).
5. Call the Extron S 3 Sales and Technical Support Hotline if the switcher still
does not respond after you have performed steps 1 through 4.