Kramer Electronics VM-1042 - Manual (Page 20)

KRAMER ELECTRONICS LTD.
18
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 recommended actions still do not result in satisfactory
operation, please consult your KRAMER Dealer.
Power and Indicators
Problem Remedy
No Power 1. Confirm that rocker switch is in “ON” position, and red LED is
illuminated.
2. Confirm that power connections are secured at the amplifier 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 power cord from the
AC outlet and from the machine and then, using a flat head screwdriver,
remove the fuse holder located directly below the power connector.
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,
with the same value.
Video Signal
Problem Remedy
No video at the
output device,
regardless of
input selected.
1. Confirm that your sources and output device are powered on and
connected properly. Video signals at the input of your amplifier should
be of an identical signal format at the output of your source. Video
signals at the output of your amplifier should be of an identical signal
format as at the input of your display or recorder.
2. Confirm that any other amplifiers in the signal path have the proper input
and/or output selected.
3. Use a Video Tester to test the video path leading to/from your amplifier.
Video level is too
high or too dim.
1. The amplifiers in this manual (except for the VM-1044 and VM-54)
have termination switches on each input. Verify that the video line is
well matched through 75 impedance, otherwise it results in a video
level that is too high or too dim when looping is performed and the
termination switches are not in proper position.
2. Confirm that the connecting cables are of high quality, properly built and
terminated with 75 BNC connectors. Check level controls located on your
source input device or output display or recorder.