Extron electronic MLS 406SA Troubleshooting, If the image does not appear or there is no sound

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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 S3 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 S3 Sales and Technical Support Hotline if the switcher still does not respond after you have performed steps 1 through 4.

PRELIMINARY

MLS 304 Series, MLS 406 Series • Operation and Setup

3-

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Contents MLS 304MA, MLS 304SA, MLS 406, MLS 406MA, MLS 406SA MediaLink SwitchersSafety Instructions English PrecautionsConsignes de Sécurité Français Sicherheitsanleitungen DeutschQuick Start MLS 304MA, MLS 406, MLS 406MA InstallationVideo Configuration Table of Contents Table of Contents, cont’d One Introduction FeaturesAbout this Manual About the MLS 304 Series and the MLS 406 SeriesTwo UL/Safety Requirements InstallationImportant Safety Instructions MLS 304 Series, MLS 406 Series InstallationMounting the Switcher Tabletop useRack mounting Power connection Power, input, and control connectionsMLS 304 Series, MLS 406 Series Installation Rear Panels and CablingBalanced Mono Input Input Type Signal BNC Color MLS 304 Series, MLS 406 Series Installation Installation, cont’dControl connection IR Link IR signal repeaterThat has an external power supply Video output, local monitor, and audio output connections Video outputsAudio outputs Unbalanced Mono Output Balanced Mono Output Ohm Total Load Wiring for 4 ohm or 8 ohm speakers MA modelsSpeakers Tapped at 7.5 Watts Each Equals 15 Watts Total Stereo Output Wiring for 4 ohm or 8 ohm speakers SA modelsExamples of speaker layouts Speaker arrangement examplesApplication Diagrams MLCExtron Projector MLCThree Front Panel Features and Operation Operation and Setup MLS 304 Series, MLS 406 Series Operation and Setup Minimum threshold at least 21%Front panel security lockout executive modes MLS 304 Series, MLS 406 Series Operation and SetupSetting Up and Optimizing the Audio Resetting the switcherMLS 304 Series, MLS 406 Series Operation and Setup Adjusting audio input levels Configuring Lineout and Preamp output levelsSignal detection threshold Making adjustmentsClipping level Normal rangeStandard mode mode Video Signal RoutingDA distribution amplifier mode mode RGB follow mode modeRemote Control Mode Selected input Input special conditions Monitor OutputMode Troubleshooting If the switcher does not respond to controlsIf the image does not appear or there is no sound Preliminary Four Serial Communication RS-232 Programmer’s GuideHost-to-MLS communications Using the command/response tables Symbol definitionsMLS 304 Series, MLS 406Series Serial Communication Command Ascii Command Response Additional description Command/response table for SIS commandsAux/Mix input Audio status for the active inputFirmware version, part number & information requests Command Ascii Command Response ? values Command/response table for special function SIS commandsInstalling the software Using the control programControl Software for Windows Special features User Mode ScreenSwitcher MLS Config Screen Preliminary Saving and restoring configurations File menu optionsUpdating firmware Follow the on-screen instructions Using the help program Key to file namesFile name Description AAppendix a Reference Material SpecificationsVideo Video input and loop-throughSync AudioMLS 304 Series, MLS 406 Series Reference Material A- Audio input Audio output mono power amp MLS 304MA, MLS 406MA onlyAudio output Lineout and Preamp Included partsAudio output stereo power amp MLS 304SA, MLS 406SA only Control/remote switcherGeneral Optional accessories Part Numbers and AccessoriesIncluded parts Replacement Part number Accessory Part numberAudio Reference Levels Frequency Response Graph for the Loudness FeatureMLS 304MA audio block diagram Audio Block DiagramsUtinpse LE CT MLS 304SA audio block diagramInputs MLS 406, MLS 406MA audio block diagramMLS 304 Series, MLS 406 Series Reference Material A-11 MLS 406SA audio block diagramThis page was deliberately left blank FCC Class a Notice Extron’s Warranty Extron Electronics, USA
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