Daktronics AF-3400-133,171,216,260 - Manual (Page 27)

Section 4: Maintenance and
Troubleshooting
Important Notes:
Maintenance and Troubleshooting
4-1
1. Power must be turned off before any repair or maintenance
work is done on the display.
2. Qualified service personnel must make any access to internal
display electronics.
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 and Troubleshooting Overview
The 133mm/171mm AF-3400 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 way signal
travels through the display.
• Power Routing Summaries offer a basic explanation of the way power
travels through the display.
• Service and Diagnostics give instructions for removing various display
components and explains the functions of circuit board connectors and the
meanings of any diagnostic LEDs.
• Maintenance includes 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 List suggests the part number and description of
display components that could possibly need replacing during the life of this
display.
• Exchange and Repair and Return Programs explain the Daktronics
component return policy.