Daktronics DAKT-0204-02, Manual

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Maintenance & Troubleshooting 21
Line Filters
Line filters remove electromagnetic noise that might otherwise interfere with local
communications channels from the power system. Refer to Figure 29 . The line filter is
mounted to the sectional termination panel.
4.8 Other Components
Video Image Processor
The video image processor (VIP) is an interface that drives video to the display
while also dimming, providing gamma and color controls, and displaying test
patterns.
Figure 30
illustrates a VIP-5060. Refer to the
DD2596497
VIP-5060
Quick Guide in Appendix B for further information.
DMP-8065
The DMP-8065 reads the video or image signal and feeds the information
to the router for distribution. It processes the video data file. Refer to
Figure 31
.
For more information refer to the DD2596357 DMP-8065 Quick Guide
in
Appendix B
.
4.9 Ventilation Systems (with Fans & Filters)
Shut off power to the display when not in use. If the power is left on when the
display is not operating, the filters may require cleaning and replacing more
often, and the electrical components are exposed to excess condensation that
shortens their life.
Check the display ventilation fans after 1,500 hours of operation and every 1,500
hours after to ensure the display cools properly. Check the fans and filters more
often if the display is located in a dusty or harsh weather environment (i.e., along a
gravel road with dust-laden air).
• 1,500 hours is equivalent to 83 days if the display operates for 18 hours a day, and the power to the
display is turned off when not in use.
• 1,500 hours is equivalent to 62 days if the display runs non-stop for 24 hours a day.
To check the operation of the cabinet ventilation fans, choose one of the following methods:
• Run an "all on white" test pattern on the display. Fans will operate
automatically while this test pattern is displayed. Check for fans that do not
rotate or do not operate smoothly. Replace any that do not run smoothly.
• Unplug the fan control cable from the PLR. Refer to Figure 32 . The fans
will turn on by default. Check for fans that do not rotate or do not operate
smoothly. Replace any that do not run smoothly. After the inspection, plug
the fan control cable back into the PLR.
Figure 29: Line
Filter
Figure 30: VIP-5060
Figure 31: DMP-8065
Fan Control Cable
Figure 32: Fan Test