Compact Scaler Switcher
Comm-Tec S.r.l.
42
www.comm-tec.it
7. Troubleshooting & Maintenance
Problems
Causes
Solutions
Output image with
snowflake
Bad quality of the
connecting cable
Try another high quality
cable.
Fail or loose
connection
Make sure the connection is
good
No output image when
switching
No signal at the input /
output end
Check with oscilloscope or
multimeter if there is any
signal at the input/ output
end.
Fail or loose
connection
Make sure the connection is
good
The switcher is broken
Send it to authorized dealer
for repairing.
POWER
indicator doesn’t
work or no respond to any
operation
Fail connection of
power cord.
Make sure the power cord
connection is good.
EDID management does
not work normally
The HDMI cable is
broken at the output
end.
Change for another HDMI
cable which is in good
working condition.
Static becomes stronger
when connecting the
video connectors
Bad grounding
Check the grounding and
make sure it is connected
well.
Cannot control the device
by control device (e.g. a
PC) through RS232 port
Wrong RS232
communication
parameters
Type in correct RS232
communication parameters.
Broken RS232 port
Send it to authorized dealer
for checking.
Cannot control the device
by front panel buttons
while can control it
through RS232 port
The front panel
buttons are locked
Send command 50605% to
unlock the front panel
buttons.
Cannot control the device
by RS232 / IR remote /
front panel buttons
The device has
already been broken.
Send it to authorized dealer
for repairing.
