Daktronics AF-3065-34-RGB - Manual (Page 27)

Maintenance & 4-1
Section 4: Maintenance & Troubleshooting
IMPORTANT NOTES:
1. Power must be turned off before any repair or maintenance work is
done on the display!
2. Any access to internal display electronics must be made by qualified
service personnel.
3. The Daktronics engineering staff must approve ANY changes made to
the display. Before altering the display, detailed drawings for the proposed
modifications must be submitted to the Daktronics engineering staff for
evaluation and approval or the warranty will be rendered null and void.
4.1 Maintenance & Troubleshooting Overview
Daktronics Galaxy series AF-3065 displays are front accessible; meaning access to the internal
components can be gained only from the front of the display.
This section provides the following Galaxy display information.
· Signal Routing Summaries: provide a basic explanation of the signal travel through the display.
· Power Routing Summaries: provide a basic explanation of the power travel through the display.
· Service and Diagnostics: provides instructions for removing various display components and
explains the functions of circuit board connectors and the meanings of any diagnostic LEDs.
· Maintenance: lists a number of steps to take to keep this Galaxy display in safe, working order.
· Troubleshooting: lists some possible display malfunctions and provides a number of possible
causes for that malfunction.
· Replacement Parts Lists: lists the part description and part number of display components that
could possibly need replacing during the life of this display.
· Exchange/Repair & Return Programs: explains Daktronics component return policy.
4.2 Signal Summary
Reference Drawings:
System Riser Diagram, RS232.............................................................. Drawing A-96058
System Riser Diagram, RS422.............................................................. Drawing A-92681
System Riser Diagram, Modem ............................................................. Drawing A-88426
System Riser Diagram, Fiber............................................................... Drawing A-110559
Schematic ...................................................................................................... Appendix B
The signal routing for the display can be summarized as follows.
1. Data from the controller computer, which runs Venus 1500 software, travels via RS232, RS422,
modem or fiber optic cable into the display.
2. For multiple face display or a display network, an RS422 (most typical) or fiber cable relays
signal between the controller of the first display and the controller in the second display.
3. From the controller, the signal then travels over a 40-conductor ribbon cables from the controller
(J11 through J16 provide signal out) to J2 on the driver of the first column of modules in the
display.
4. Data exits at J1 and is relayed to J2 of the next driver board and so on, traveling down the entire
row of modules. The drivers use this display data to control the LEDs.
Troubleshooting