Extron electronic VSC 150 user manual Installation and Operation, cont’d, Symptoms, Solutions

Installation and Operation, cont’d

	are set for the formats that match the cable configuration
	and the requirements of the display/recording devices.
4.	Verify that the 75 Ohm video input termination DIP
	switch has been set correctly.
5.	To test the system setup and output, substitute a video
	test generator for the computer input.
6.	Confirm that the input is receiving a signal with a com-
	patible scan rate (horizontal frequency between 24 kHz
	and 70 kHz, and a vertical frequency of 50 Hz to 120 Hz).
7.	Call Extron’s customer support hotline if needed. Be
	prepared to discuss the steps you have taken and the
	equipment involved.

If the image does not display correctly

Symptoms	Solutions
The picture is	Adjust the centering and sizing controls
shifted off the
	( ,	).
screen edges.
The image is	Change the 75 ohm/high Z video input
stable, but it has
	termination. If that doesn’t solve the
ghosting or
	problem, use a different input cable.
blooming.
	Video input may be double-terminated. If
	a local monitor or a termination adapter is
The picture is	attached to the local monitor output
faint or cuts out,	connector, make sure that the 75 Ohm
and the signal is	video input termination DIP switch is set
weak.	to Off (for high Z termination).
	Disconnect all unused output cables. Do
	not connect cables to both the S-video and
	RGB/component outputs at the same time.
	Adjust the hue/tint and color controls on
The picture	the display device.
appears without	Make sure that the video display/
color.	recording equipment is using the same
	standard (NTSC or PAL) as the VSC 150.
In a genlocked
system,	The color subcarrier phase (Sub Phase)
displayed color	might require readjustment.
is incorrect.
The image still
does not display	Call Extron’s customer support hotline.
correctly.

If the scan converter does not respond to controls

Symptoms	Solutions
The picture does not move	The VSC 150 may be set for
	Executive mode.
on screen when the
horizontal and vertical	Adjustments can be made via
centering controls are	RS-232 control, or...
rotated, and the filtering	Executive mode can be turned
settings do not change
	off by pressing the Freeze and
when the filtering controls
	Size controls simultaneously for
are pressed.
	2 seconds. See page 2-4.
	Signals from the IR 601 remote
The VSC 150 responds to	control may not be reaching the
	scan converter.
adjustments made via the
	Change the placement of the
front panel, but not to
	equipment so the signals have a
selections from the IR
	clear transmission path between
remote control.
	the remote control and the
	VSC 150.
There is no response to	Ensure that the baud rate
	(9600 baud) and communication
commands from the
	protocol are set correctly. See
RS-232 controller.
	page 3-2.

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