Daktronics AB-1600-1.5,2.5 - Manual (Page 67)

Maintenance & Troubleshooting
4-23
Having read the previous notes, complete the following steps to replace bad weather
stripping:
1. Starting at the bottom of one side, apply the
weather stripping up the side of the assembly as
close to the front edge of the metal side plate as
possible.
2. Continue the weather stripping onto the top of the
assembly. Pull the weather stripping firmly to
produce a tight corner and then, while still pulling it
tightly, apply it around the raised curve on the top
of the louver. Stay on the raised portion of the
louver, but stay as close as possible to the ledge.
3. Apply the weather stripping across the top of the
assembly (across the top of the louver) and again
pull it firmly to follow the raised curve of the
louver and to wrap it over the corner of the
assembly.
4. Continue the application down the side of the
metal side plate as done in step 1.
5. Clip the weather stripping flush at the bottom of
both sides of the assembly.
6. After putting the lens/reflector assembly back into the cabinet, check the spacing between this
assembly and the assemblies and/or display cabinet around it with the .032-inch feeler gauge found
in the tool kit. The feeler gauge should not move freely. There should be some resistance along the
entire length of all sides of the assembly. Refer to Figure 65.
4.14 Louver Maintenance
The louvers play an important role in making this large matrix display an effective communication
device. The louvers cast a dark shadow on the display face that contrasts sharply with the brightly lit
pixels. The louvers also help direct light from the pixels.
The louvers require no maintenance. However, louvers that are severely bent or damaged should be
replaced to maximize display effectiveness.
Complete the following steps to replace a louver.
1. Remove the lens/reflector assembly from the cabinet as explained in Section 4.3.
2. Remove both the lampbanks from the back of the lens/reflector assembly as explained in Section
4.6.
3. Remove the lampbank latches by removing the single screw that holds each one in place.
Figure 65: Weather Stripping Feeler Gauge