Daktronics DF-12xx - Manual (Page 23)

Maintenance and 3-1
Troubleshooting
Section 3: Maintenance and
Troubleshooting
IMPORTANT NOTES:
1. Disconnect power before doing any repair or maintenance
work on the display!
2. Allow only qualified service personnel access to internal
display electronics.
3. Disconnect power when not using the display.
3.1 Cabinet Specifications
Reference Drawings:
Shop Dwg, DF-1219, 18” Drop-in w/ BL Grade ID
Drawing B-225876
3.2 Component Location and Access
Reference Drawings:
Shop Dwg, DF-1219, 18” Drop-in w/ BL Grade ID
Drawing B-225876
The DF-1219 is made up of two main components: the circuit boards that make up
the digits and the driver enclosure.
Display Digits:
• A single circuit board makes up the digits for the 10” and 18” digits
Each host or primary display (the mirror does not contain a driver enclosure)
contains an enclosure that includes the following devices:
• Display Driver
• 24V DC power supply
• 10V AC transformer
• Signal/Power Input Terminal Jack
• Signal Board (Surge board on direct displays or a modem)
• Light (photo) sensor
For this front-access module, all internal electronic components and digits can be
reached by opening either the left hinged access door on the front of the display or
removing digits.
The display has a hinged door that swings outward when the two screws on the
display face panel are removed, as shown in
Figure 10 .