Daktronics AB-1600-1.5,2.5 - Manual (Page 48)

Maintenance & Troubleshooting 4-4
Refer to Section 4.10 for troubleshooting information for the internal temperature monitoring
system.
4.3 Accessing the Inside of the Display
Reference Drawing:
Front Module Access, 8x8 Lens/Ref. Assy..............................................Drawing A-122363
Series 1600 large matrix displays are designed to be either front or rear accessible, depending on site
requirements and customer preference.
Front Accessible Displays – Removing Lens Reflector Assemblies
Front accessible displays require lens/reflector assemblies to be
removed in order to reach the components within the display. If the
display is rear accessible, refer to Rear Accessible Displays –
Removing Back Sheets.
Complete the following steps and refer to Drawing A-122363 in
Appendix B to remove a lens/reflector assembly from the front
of the display.
1. Remove the lenses from the fourth row of columns one and eight as
seen in Figure 42 (lens removal is covered in Section 4.4).
2. Insert a 10 in. (254mm) flathead screwdriver into either of the latching mechanism access
holes that were covered by the lenses. Keep the screwdriver edge vertical while pushing it into
the access hole.
3. Refer to the Drawing A-122363 in Appendix B for a detailed illustration of the correct
screwdriver position to use while unlatching a lens/reflector assembly from the front. Be
careful not to angle the screwdriver too sharply while inserting it into the access hole –it may
become stuck behind the EMI shield as seen in Drawing A-122363.
4. Use the handle of the screwdriver as a lever to disengage the latching mechanism on this side
of the assembly. Pushing the screwdriver handle sideways, away from the assembly, will free
this side of the assembly. Figure 43 illustrates this procedure.
Note: It takes only mild pressure on the screwdriver handle to free each side of the lens/reflector
assembly. Excessive force can bend the rod.
Figure 42: Latching Mechanism
Access Holes
Figure 43: Assembly Latching Mechanism