Glossary 29
Glossary
Lanyard Attachment Ring:
a ring found on the back of each module. The lanyard attaches to the ring to keep the
module from falling to the ground.
Light Emitting Diode (LED):
a low energy, high intensity lighting unit.
Line Filter:
a device that removes electromagnetic noise from the power system to avoid interference with local
communications channels. Line filters sometimes mount on brackets with power supplies. Other times they may
mount alone on a bracket.
Louver:
a plastic shade positioned horizontally above each pixel row. Louvers increase the contrast level on the
display face and direct LED light for easier viewing.
Module:
a display board with LEDs, a driver board or logic card, a black plastic housing, and a module latch
assembly. Each module is individually removable from either the front or the rear of the display.
Pixel:
the smallest single point of light on a display that can be turned on and off. For LED displays, a pixel is the
smallest block of light emitting devices that can generate all available colors.
Power Supply:
a device that converts AC line voltage from the termination panel to low DC voltage for one or
module driver boards. One power supply may power multiple modules.
ProLink Router (PLR):
a circuit board that passes display data from the ProLink6 control system modules and other
PLRs. The ratio of PLRs to modules varies with display application.
Termination Block:
an electrical point usually used to connect internal power and signal wires to wires of the same
type coming into the display from an external source.
Video Image Processor (VIP):
an interface that drives video to the display while also dimming, providing gamma
and color controls, and displaying test patterns.
Summary of Contents for DAKT-0204-02
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Page 28: ...24 Maintenance Troubleshooting...
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