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KRAMER ELECTRONICS, LTD.
9.
TAKING CARE OF MACHINE
Do not locate your machine in an environment where it is susceptible to dust or moisture. Both of these
may damage the electronics, and cause erratic operation or failure. Do not locate your switcher where
temperature and humidity may be excessive. Doing so may also damage the electronics, and cause
erratic operation or failure of your switcher. Do not clean your switcher with abrasives or strong
cleaners. Doing so may remove or damage the finish, or may allow moisture to build up. Take care not
to allow dust or particles to build up inside unused or open connectors.
10. TROUBLESHOOTING
NOTES
1.
Please note that if the output signal is disturbed or interrupted by
very strong external electromagnetic interference, it should return and
stabilize when such interference ends. If not, turn the power switch off
and on again to reset the machine.
2.
If the following recommended actions still do not result in
satisfactory operation, please consult your KRAMER Dealer.
10.1
Power and Indicators
Problem Remedy
No power
1.
Confirm that the rocker switch is in the “ON” position, and that it is
illuminated.
2.
Confirm that power connections are secured at the machine and at the
receptacle. Make sure the receptacle is active, outputting the proper
mains voltage.
3.
If there is still no power, check the fuse. Remove the power supply from
the AC outlet and from the machine and then remove the cover of the
VS-3000 and locate the internal fuse. Confirm that the fuse is good by
looking at the wire connected to the ends of the fuse. If the wire is
broken, replace the fuse with another of the same value and replace the
cover of the machine.
10.2
HUM and Electric Interference
Problem Remedy
Noise bars “roll” up
or down in the output
image
or:
Low frequency hum
in the output signal
Hum bars (ground loop) are caused by a difference in the ground potential
of any two or more devices connected to your signal path. This difference is
compensated by passing that voltage difference through any available
interconnection, including your video cables.
WARNING
!
Do not disconnect the ground from any piece
of video equipment in your signal path!
Check the following to remove hum bars:
1.
Confirm that all interconnected equipment is connected to the same
phase of power, if possible.
2.
Remove equipment connected to that phase that may introduce noise,
such as motors, generators, etc.
3.
Disconnect all interconnect cables and reconnect them one at a time until
the ground loop reappears. Disconnect the affected cable and replace, or
insert an isolation transformer in the signal path.
