Troubleshootingubleshooting, cont’d

The image should be displayed properly on the screen.

If the image does not appear

1.Ensure that all devices are plugged in.

2.Make sure that each device is receiving power. If the switcher does not power on, and the AC power source is functioning correctly, the AC fuse may be blown. (See “Replacing the AC fuse” on page B-3.)

3.Check the cabling, wiring, and grounding, and make adjustments as needed. Ensure that the selected output rate and sync format are appropriate for the output devices. (See page 3-6.)

4.To test the system setup and output, Display a test pattern. (See “Selecting a test pattern” on page 3-7.)

5.Confirm that the input is providing a signal with a horizontal frequency between 15 kHz to 100 kHz and a vertical frequency between 50 Hz and 120 Hz.

6.Call Extron’s customer support hotline if needed. Be prepared to discuss the steps you have taken and the equipment involved.

If the image is not displayed correctly

Symptoms

Solutions

The picture is shifted off the

Adjust the centering and sizing controls.

screen edges.

 

 

 

The image is stable, but it has

Use a different input cable.

ghosting or blooming.

 

 

 

The image is still not

Call Extron’s customer support hotline.

displayed correctly.

 

 

 

If the switcher does not respond to controls

Symptoms

Solutions

The picture does not move on

The switcher may be set for Executive mode.

screen when the horizontal

Adjustments can be made via RS-232 control,

and vertical centering

or Executive mode can be turned off by

controls are rotated, and the

pressing the two outside menu selection

filtering settings do not

buttons simultaneously and holding them

change when the filtering

for 2 seconds. See page 3-23.

controls are pressed.

 

 

 

There is no response to

Ensure that the baud rate (9600 baud) and

commands from the RS-232

communication protocol are set correctly. See

controller.

page 4-2.

 

 

5-2 SGS 408 Switcher • Troubleshooting

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Extron electronic SGS 408 manual Troubleshootingubleshooting, cont’d, If the image does not appear