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MLS 100 A • User Guide (Continued)
Troubleshooting
Connect the cables between the MLS and the A/V input devices. Connect the provided power supply and a host computer,
1.
third party control system, or MediaLink Controller to the MLS MLC/RS-232 Power port. Connect the MLS to the display
device (projector) and audio output device (tape deck, speakers).
Connect the control device (computer, control system, or MLC 206), the A/V source devices, projector and audio output
2.
device to a power source and turn them on.
Start the MediaLink Control Program and set up the MLS (and the MLC, if one is used).
3.
NOTE:
To set up the MLS 100 A switcher you must use MediaLink Control Software version 2.0 or higher. If the software
version is below 2.0, download a new version of the software from the Extron Web site,
Press an input button on the MLS, watch the MLS LEDs, observe the display, and listen to the audio.
4.
If the input selection LED does not light when a button is pressed, the MLS might not be receiving power. Check the
a.
wiring at the MLS MLC/RS-232 Power port.
•
If the conductor assignments are not correct, the circuits may be damaged if power is applied to the wrong pole.
•
If the wiring is correct, ensure that the power supply has been plugged in to a functional power source.
If power is present at the MLS and at the input and output devices, but nothing happens (an A/V switch is not
b.
detected) when a button is pressed:
•
If a MediaLink Controller is part of the system, the MLC firmware may be too old. If it is older than version 1.04,
contact Extron for a firmware upgrade.
NOTE:
The MLC to which the MLS 100 A switcher is connected must have MLC firmware version 1.04 or higher.
Use one of the following methods to find out the version levels of the MLC firmware and the control software:
•
Connect the MLC RS-232 port to a computer or RS-232 controller, and send an SIS command of Q to the MLC.
The MLC responds with its firmware version.
•
Connect the MLC RS-232 port to a computer, start the MediaLink control software, and click on Help to display
the software version, the MLC firmware version, and the MLS firmware version.
•
The audio settings may be too low. Adjust the Aux/Mix level by turning the Aux/Mix Level adjustment on the front
panel. Adjust each selectable input level by using SIS commands, a control system, or the Switcher (MLS)
Config. part of the MediaLink Control/Configuration Software.
•
The input or output connectors may not be firmly attached to the MLS, or they may be miswired.
If power is present, but sound from inputs 1 through 4 is not audible, and if changing the audio volume and gain/
c.
attenuation settings does not resolve the problem, make sure that neither audio input 0 nor audio mute is selected. Use
the SIS information (I) command or the MediaLink Control/Configuration Program to determine the audio settings.
Call the Extron S
3
Sales and Technical Support Hotline if the equipment still does not respond when the MLS buttons are
5.
pressed.
Serial Communication
The MediaLink switcher can be remotely set up and controlled via a host computer or other device (such as a control system)
attached to the rear panel MLC/RS-232 Power port. Alternatively, the switcher can be controlled by an optional MediaLink
Controller (MLC) (connected to the MLS MLC/RS-232 Power port), or by an RS-232 device acting through the MLC. The control
device (host) can use either the Extron Simple Instruction Set (SIS
for Windows
. For details on use and setup of a system that includes a MediaLink Controller, see the MediaLink Controllers User
®
Manual.
The switcher protocol is:
•
9600 baud
•
no parity
The MLC/RS-232 Power 3.5 mm, 5-pole captive screw connector pin assignments are shown
on the right.
6
™
) commands or the graphical control/configuration program
•
1 stop bit
•
no flow control
www.extron.com.
Control-power
pinout_MLS100.eps
MLC/RS-232
POWER
MLS 100 Series
Switcher
MLC/RS-232
A B
Power Port
+12 VDC
Ground ( )
B
Receive (Rx)
A
Transmit (Tx)
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