Troubleshooting – Muxlab Component Video Hub User Manual
Page 15
© MuxLab Inc.
Component Video Hub Installation Guide
Page 15
4.
Troubleshooting
The following tables describe some of the symptoms, probable causes and possible
solutions in respect to the installation of the Component Video Hub. If you still cannot
diagnose the problem, please call MuxLab Customer Technical Support at 877-689-5228
(toll-free in North America) or (+1) 514-905-0588 (International).
Video
Power
LED
Video
LED
Probable Causes
Possible Solutions
No image
OFF
OFF
Power off.
Check power supplies of Component
Video equipment.
No image
ON
ON
Wrong pin configuration.
Check pin configuration and verify
straight-thru wiring.
No image
ON
OFF
No continuity in video link.
Verify cable continuity between pairs of
baluns.
No image
ON
ON
Improper connection. Swapped pairs.
Check that baluns are connected to
correct video inputs and outputs.
Picture
distorted
ON
ON
EMI interference.
Split pair.
Check that wiring is not too close to
transformers and lighting ballasts.
Check if the UTP pairs are not split.
Wrong
colors
ON
ON
Reversed polarity.
Check wiring and ensure straight-through
polarity.
Loss of
brightness
Loss of
color
Smearing
ON
ON
Exceeded distance/bandwidth
specifications.
Lower grade UTP cable is introducing
high losses.
Check DC loop resistance and verify if
distance spec is exceeded.
Reduce cable length or eliminate high-
loss components.
Replace cable by higher grade.
Horizontal
upward
moving
bands
ON
ON
Ground loop problem between one or
more devices.
Consecutively turn off other video
sources to determine which video source
is the cause of interference. Install RGB
ground loop blockers at the source or
displays.