Daktronics AB-1600-1.5,2.5 User Manual
Page 44
Maintenance & Troubleshooting
4-8
Complete the following steps to insert a lens into the lens/reflector assembly.
1. Insert the lens’ indexing tabs into their respective slots on the lens/reflector assembly. There is
one indexing tab on the bottom-left and bottom-right corners of the lens.
2.
Push the lens into position behind the louver offset. If necessary, gently press up on the louver
above the lens to aid in insertion. Applying excessive force to the louver may cause it to become
deformed.
3. Verify that the lens position and placement is consistent with others in that row. If a lens looks
out of position it is likely an indexing tab is not in its slot.
4.5
Lamp Testing & Replacement
This display design allows for easy lamp replacement with front access. Always replace non-
functioning lamps prior to scheduled events, or as soon as possible, for best viewing.
A 3.58-watt lamp is behind each lens. Use the controller lamp test to locate bad lamps. Use the lamp
test form located in Appendix B to mark the location of bad lamps. Refer to Section 4.25 and 4.26
for the part numbers of replacement lamps and lenses.
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Daktronics-approved 3.58-watt lamps have an estimated life of 17,000 hours if operated at 11.0
volts. Always use Daktronics approved lamps. Lamps purchased from Daktronics have tighter
specifications than similar lamps built in standard production. The recommended lamps give the
sufficient intensity and beam spread to match the display design. Lamps not built to Daktronics
specifications will not perform as well, will not give the intended results, and will adversely
affect the beauty of the display.
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A qualified individual who is capable of operating the controller equipment should do lamp
testing.
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Display power must be OFF for lamp replacement.
The life rating of a lamp is the average value in hours within which 50% of a test quantity is expected
not to fail and within 70% of the rated life, 90% of a test quantity is expected not to fail. Lamp life
will increase if the average intensity of the lamp is less than maximum intensity.
Figure 45: Removing a Lens