Daktronics Galaxy AF-3400 Series, Display Manual

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Section 4: Maintenance and
Troubleshooting
Important Notes:
Power must be turned off before any repair or maintenance work
is done on the display
.
Qualified service personnel must make any access to internal
display electronics
.
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
Daktronics Galaxy
®
46 mm, AF-3400 series 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, 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 a safe and working order.
•
Troubleshooting lists some possible display malfunctions and provides a
number of possible causes for that malfunction.
•
Replacement Parts List includes the description and part number of
display components that may need replacing during the life of this display.
•
Exchange and Repair and Return Programs explain Daktronics
component return policy.
Note: A single pixel flashing in the lower right hand corner of the display indicates
that the display has power, but no messages are currently running.
Maintenance and Troubleshooting
4-1