Daktronics AB-1600-1.5,2.5 - Manual (Page 45)

Maintenance & Troubleshooting
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. 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.
Make certain the back sheets are fastened securely into place.
4. Dirt and contaminants may enter the display if it is operated 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
will void 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.
Sub-sections 4.3- 0of Maintenance & Troubleshooting applies to the servicing of all
Series 1600 large matrix displays.
Sub-section 4.11 is dedicated to servicing displays with line receivers.
Sub-section 4.12 is dedicated to servicing displays with data distributors.
4.1 Maintenance & Troubleshooting Overview
Series 1600 large matrix displays are either front or rear accessible, depending on site requirements
and customer preference.
Information in Section 4 is grouped as listed below. The information found within each group is also
provided.
• 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 displa y component to
Daktronics for repair or replacement.