Daktronics AB-1600-1.5,2.5 - Manual (Page 43)

Maintenance & Troubleshooting 4-1
Section 4: Maintenance & Troubleshooting
IMPORTANT NOTES:
1. Turn off power before performing any repair or maintenance work on
the display!
2. Only qualified service personnel may access internal display
electronics.
3. Do not operate the display with the back sheets removed! The cabinet is
positively pressurized, directing adequate airflow around the lamps and out
through the lenses. Display operation without the back sheets in place and
fans running could cause damage to the display and will void the warranty.
Fasten the back sheets securely into place.
4. Dirt and contaminants may enter the display if it operates without the fan filters in
place or with dirty fan filters. These contaminants may cause premature failure of the
electronic components. Operating the display with dirty fan filters or without fan filters
voids the warranty.
5. The Daktronics product managers engineering staff must approve any changes
that may affect the weather-tightness of the display. This is to include, but is not
limited to, border shrouding, back sheets, cooling fans, fan filters and filler panels. Before
making ANY modifications to the weather tightness of the display, submit detailed
drawings to our engineering staff for evaluation and approval or the warranty will be null
and void.
4.1 Maintenance & Troubleshooting Overview
Small matrix displays are front accessible units, meaning access to the internal components is only
from the front of the display.
This list provides an overview of information found within each group.
• Operational Summary: outlines the power and signal routing of the display, as well as operation
of the ventilation system.
• Servicing of Display Components: explains how to remove various display components and
provides operational and diagnostic information on each item.
• Maintenance: addresses the steps that must be taken to keep the display in safe, operational
condition.
• Troubleshooting: lists the causes of a number of possible display malfunctions.
• Replacement Parts List: provides the descriptions and part numbers of selected display
components.
• Exchange/Replacement Procedure: explains the process for returning a display component to
Daktronics for repair or replacement.