Daktronics CE-1010 User Manual
DataTrac
p
CE-1010
1.2”, 2.1”, 3.2”, 4.2”
Display Manual
ED11477 Rev 4 1 September 2004
331 32nd Ave PO Box 5128 Brookings SD 57006
Tel 605-697-4034 or 877-605-1113 Fax 605-697-4444
www.daktronics.com e-mail: hel
desk@daktronics.com
ED11477
Product 1120
Rev 4- 1 September 2004
DAKTRONICS, INC.
Copyright © 2004
All rights reserved. While every precaution has been taken in the preparation of this manual,
the publisher assumes no responsibility for errors or omissions. No part of this book covered by
the copyrights hereon may be reproduced or copied in any form or by any means – graphic,
electronic, or mechanical, including photocopying, taping, or information storage and retrieval
systems – without written permission of the publisher.
DataTrac is a registered trademarks of Daktronics, Inc. All others are trademarks of their respective companies.
Table of Contents
Section 1: Introduction....................................................................................1-1
1.1 Safety Precautions..................................................................................... 1-2
1.2 Display Overview...................................................................................... 1-2
1.3 Network Concepts.....................................................................................1-3
1.4 Part Definitions.......................................................................................... 1-4
1.5 Daktronics Nomenclature.......................................................................... 1-5
Section 2: Mechanical Installation.................................................................2-1
2.1 Support Structure Design ..........................................................................2-1
2.2 Z-Bracket Installation for Sectional Display Mounting ............................ 2-2
2.3 Electrical Junction Box Installation........................................................... 2-2
2.4 Hanging Display Sections ......................................................................... 2-2
2.5 Display Ventilation Requirements............................................................. 2-3
Section 3: Electrical Installation ....................................................................3-1
3.1 Signal......................................................................................................... 3-1
Cables .....................................................................................................3-1
Installing an RJ11 Connector .................................................................... 3-1
3.2 Power......................................................................................................... 3-2
Power Requirements.................................................................................. 3-2
Grounding.................................................................................................. 3-2
Power Connection – Pluggable Cord Connected Displays........................3-2
3.3 RS422 System ........................................................................................... 3-3
3.4 Sign to Sign/Section to Section Connections ............................................ 3-3
Section 4: Maintenance and Troubleshooting..............................................4-1
4.1 Accessing the Interior of the Display........................................................ 4-2
4.2 Display Interior.......................................................................................... 4-3
LED Module Replacement........................................................................ 4-3
Power Supply Replacement....................................................................... 4-4
Display Controller..................................................................................... 4-5
4.3 Controller Address and Test Mode............................................................ 4-6
4.4 Troubleshooting......................................................................................... 4-6
4.5 Replacement Parts ..................................................................................... 4-7
4.6 Daktronics Exchange and Repair and Return Programs............................4-8
Appendix A: Reference Drawings ........................................................................ A-1
Appendix B: Signal Converter .............................................................................. B-1
Table of Contents
i
List of Figures
Figure 1: Drawing Label........................................................................................................1-1
Figure 2: Positions-1648 Display...........................................................................................1-5
Figure 3: Typical Label..............................................................................................................1-6
Figure 4: Six conductor RJ11 Connector and Cable.............................................................. 3-1
Figure 5: Flipped Cable with RJ Connectors .........................................................................3-1
Figure 6: Wire with Outer Jacket Stripped.............................................................................3-1
Figure 7: Power Cord Connection..........................................................................................3-2
Figure 8: Output Signal Cable Connection ............................................................................3-3
Figure 9: Screw Locations......................................................................................................4-2
Figure 10: Locating module panel ¼-turn fasteners...............................................................4-2
Figure 11: Module Panel Removal.........................................................................................4-2
Figure 12: LED Module Ribbon Cable Removal...................................................................4-3
Figure 13: Removing the wire cloth retainer frame nuts........................................................4-3
Figure 14: Removing Top and Bottom Module Screws.........................................................4-4
Figure 15: Power Supply........................................................................................................4-4
Figure 16: Power Supply Cable Connections.........................................................................4-4
Figure 17: MDC Controller.................................................................................................... 4-5
Figure 18: End View; Display Controller DIP Switches........................................................4-6
ii
List of Figures
Section 1: Introduction
This manual explains the installation and maintenance of Daktronics Panelized DataTrac™
CE-1010 displays. For questions regarding the safety, installation, operation or service of this
system, please refer to the telephone numbers listed on the cover page of this manual.
The manual is divided into six sections: Introduction, Mechanical Installation, Electrical
Installation, Maintenance and Troubleshooting, Appendix A and Appendix B.
• Introduction covers the basic information needed to make the most of the rest of this
manual. Take time to read the entire introduction as it defines terms and explains
concepts used throughout the manual.
• Mechanical Installation offers general guidance on sign mounting.
• Electrical Installation provides general guidance on terminating power and signal cable
of the sign.
• Maintenance and Troubleshooting addresses such things as removing basic sign
components, troubleshooting the sign, performing general maintenance, and exchanging
sign components.
• Appendix A includes most of the drawings referenced in this manual.
• Appendix B includes information on the signal converter.
Daktronics identifies manuals by an ED number located on the cover page of each manual.
For example, this manual would be referred to as ED11477.
Listed below are a number of drawing types commonly used by Daktronics, along with the
information that each is likely to provide. This manual might not contain all these drawings
• System Riser Diagrams: overall system layout from control computer to sign, power
and phase requirements.
• Shop Drawings: fan locations, mounting information, power and signal entrance points
and access method (front and rear).
• Schematics: power and signal wiring for various components.
• Component Placement Diagrams: locations of critical internal sign components such as
power supply assemblies, controller boards, thermostats and light detectors.
Figure 1 illustrates Daktronics drawing label. The drawing number is located in the lowerright corner of the drawing. Listing the last set of digits and the letter preceding them
identifies drawings in the manual. In the example below, the drawing would be referred to as
Drawing B-206146. Reference drawings are inserted in Appendix A.
.
Introduction
Figure 1: Drawing Label
1-1
All references to drawing numbers, appendices, figures, or other manuals are
presented in bold typeface, as shown below.
“Refer to Drawing B-206146 for the power supply connections.”
Additionally, drawings referenced in a particular section are listed at the beginning
of that section as seen in the following example:
Reference Drawing:
Schem; Primary Signal, Internal W/.QC ............................ Drawing B-206146
Daktronics signs are built for long life and require little maintenance. However, from
time to time, certain sign components will need replacing. The Replacement Parts
List in Section 7 provides the names and numbers of components that may need to
be ordered during the life of the sign. Most sign components have a white label that
lists the part number. The component part number is in the following format: 0P-_ _
_ _-_ _ _ _ (circuit board) or 0A-_ _ _ _-_ _ _ _ (multi-component assembly).
Following the Replacement Parts List is the Daktronics Exchange and Repair
and Return Programs. Refer to these instructions if any sign component needs
replacement or repair.
1.1 Safety Precautions
1. Read and understand these instructions before installing.
2.
Be sure that the display is properly grounded.
3.
Disconnect power before working on the display.
4.
Do not modify the displays or attach any panels or coverings to the display
without the express written consent of Daktronics, Inc.
5.
Most products are equipped with a 3-wire grounding-type plug, a plug
having a third (grounding) pin. This plug will only fit into a grounding-type
power outlet. This is a safety feature. If you are unable to insert the plug
into the outlet, contact a qualified electrician to replace your obsolete outlet.
Do not defeat the purpose of the grounding-type plug.
1.2 Display Overview
The Daktronics DataTrac CE-1010 Indoor LED displays have been designed and
manufactured for performance, reliability, easy maintenance, and long life. The
displays consist of an array of LED pixels. The configuration of the LED pixels is
dependent on the family of LED displays. The standard character is seven pixels
high by five pixels wide.
The DataTrac CE-1010 system is available with DataView or Venus 1500 protocol
for message control. The PC controls one or more DataTrac sectional displays. The
displays are offered as single-face sectional displays, which are single-sided standalone units. They can be mounted side-by-side and stacked on top of each other to
create a larger display.
1-2
Introduction
DataTrac displays are character-based indoor LED displays, which are available in
ri-color (red, green and amber) characters. This display family is for 5x7 single-
t
stroke fonts. Daktronics offers the DataTrac displays with a 1.2", 2.1", 3.2", or 4.2"
character height in various lengths. The DataTrac model numbers are described as
follows: CE-1010-RRR-CCC-HH-XX
= Panelized DataTrac Display
CE
1010
RRR
CCC
= 1010-Panelized with screen
= Number of rows of characters—1.2 available in 8 and 12 high sections; 2.1 available in
4, 8 and 12 high sections; 3.2 and 4.2 available in 4 or 6 high sections
= Number of columns of characters—1.2 and 2.1 available in 24 and 30 character
sections; 3.2 available in 18 and 24 character sections; 4.2 available in 12 and18
character sections
= Character height—1.2, 2.1, 3.2 or 4.2
HH
= RG=Tri-color (red, green and amber)
XX
1.3 Network Concepts
The concept of using LED displays as a cost effective, high impact method of
communication is rapidly growing throughout many industries and businesses. The
reasons for this growth are many, but the need for additional features and complexity
of multiple sign installations has emerged, and the Daktronics display systems have
been designed to meet those needs. The common thread to most clients’ requests is a
means of programming and controlling a group of signs from a central control point.
Daktronics responded by developing a powerful system of interconnecting and
controlling signs. Great care has been taken to design products that will satisfy a
wide variety of installations. Some of the design goals of these systems include the
following:
• Easy transfer of messages
• The ability to tell a sign in the network which message it should run
• The ability to determine the status of any sign on the network
• The ability to control multiple sign technologies on the same network
All of the programming features would seem insignificant if the installation of the
system
s could not be accomplished with basic tools and without technical difficulty.
Daktronics decided to use the very popular and readily available RJ11 connector.
This connector is also used on modern home and office telephone equipment.
All that is required for signal installation is standard six (6) conductor modular
t
elephone wire. For some installations, it may be possible to buy pre-terminated
telephone cables for use with the displays.
The DataTrac CE-1010 display uses a RS422 networking system. RS422 (EIA/TIA422-B) is a standard com
transmission scheme, which uses a typical maximum cable length of 1.2 km
(approximately 4000 feet). The main advantage of RS422 over RS232 is the longer
cable length that is possible. A signal converter is needed to convert the computer’s
RS232 to RS422.
munication interface that utilizes a differential balanced
Introduction
1-3
1.4 Part Definitions
Com Port: connector on the back of the controller PC. The Com Port is used to
control the sign network through either a 9- or 25-pin serial connector.
Display Configuration: refers t
information will be automatically displayed when the display is powered up.
Flipped Cable: si
6 of connector B.
LAN: abbreviation for Local Area Network
Loop Back Test: troubleshooting test that connects the transm
more information on this test refer to Appendix B.
Module: one uni
lines by 6 characters. The 3.2" and 4.2" displays' modules consist of 2 lines by 6
characters.
Network: consists of multiple signs connected to each other.
RS232: standard PC communication type with a maximum cable length of 25 feet
(7.62 m
RS422: standard differential communication type with a maximum cable length of
4000 feet
RX LED: LED on t
back to the signal converter.
Sign Address: identification num
software uses the address to locate and communicate with each display.
Signal Cable Tester: used to test the cable connections and data communication.
Signal Converter: Dakt
RS422. The signal converter is used in RS422 systems.
TX LED: LED on t
to the display.
X,Y Coordinates: u
sectionalized DataTrac display.
eters).
(1.2 kilometers).
x (6) conductor phone cable. Pin 1 of connector A connects to pin
t of the display. The 1.2" and 2.1" displays’ modules consist of 4
he signal converter that indicates if the display is sending data
ronics supplied unit that converts the data from RS232 to
he serial converter that indicates the control PC is sending data
sed to reference the location of LED blocks within the entire
o a display’s model number, address, etc. This
it to receive lines. For
ber assigned to each sign of a network. The control
1-4
Introduction
1.5 Daktronics Nomenclature
The X-coordinate refers to the LED block placement within a row of characters. To
count the placement of the X-coordinate, begin with the left-most LED block as X=1
and continue counting across through the entire display to the right-most LED block.
The Y-coordinate refers to the LED block placement within a column of characters.
To count the placement of the Y-coordinate, begin with the upper-most LED block
as Y=1 and continue counting down through the entire display to the bottom-most
LED block. The software on the control PC uses these coordinates to determine the
placement of data within the larger display.
The X,Y coordinates at the upper left character of each section need to be configured
for proper display orientation.
In addition, various Daktronics drawings may contain the following labeling
formats:
Finally, drawings commonly have Daktronics part numbers. You can use those part
numbers when requesting replacement parts from Daktronics Customer Service.
Take note of the following part number formats:
Introduction
Figure 2: Positions-1648 Display
• “TB_ _” shows a termination block for power or signal cable.
• “F_ _” denotes a fuse.
• “E_ _” signifies a grounding point.
• “J_ _” stands for a power or signal jack.
• “P_ _” represents a power or signal plug for the opposite jack.
• “0P-_ _ _ _-_ _ _ _” gives the form of an individual circuit board, such as a
module driver.
1-5
• “0A-_ _ _ _-_ _ _ _” represents an assembly, such as a circuit board and the
plate or bracket to which it mounts. A collection of circuit boards working
as a single unit may also carry an assembly label.
• “W-_ _ _ _” indicates a wire or cable. Cables may also carry the assembly
numbering format in certain circumstances. This is especially true of ribbon
cables.
• “F-_ _ _ _” signifies a fuse.
Most circuit boards and components within this sign
carry a label that lists the part number of the unit. If
the Replacement Parts List in Section 4.13 does not
list a circuit board or assembly, use the label to order a
replacement.
Figure 3 illustrates a typical label. The
Figure 3: Typical Label
part number is in bold.
1-6
Introduction
Section 2: Mechanical Installation
Reference Drawings:
Shop Dwg; CE-1010-***-1.2-RG-Thin Mount
Shop Dwg; CE-1010-4**-2.1-RG-Thin Mount
Shop Dwg; CE-1010-***-2.1-RG-Thin Mount
Shop Dwg; CE-1010-***-3.2-RG-Thin Mount
Shop Dwg; CE-1010-***-4.2-RG-Thin Mount
Spacing Plate; XX.XX" Tall-Thin Mount
Shop Dwg; Install Notes-Thin Mount
Mtg Brkt Assy; CE-10**-824-2.1-Thin
Shop Dwg; Install Details CE-1010-1672-2.1-Thin
Generic; System Riser Diagram
The sectional display models shown in Draw
151293 and A-154044 are available in various standard sizes and can be arranged to create
larger display sizes. The arrangement of these sections requires Daktronics contract
engineering.
Daktronics contract engineering and the Daktronics project manager will provide installation,
l
ayout, and riser diagrams once the overall display size has been determined. Drawings A-
152630, A-152599, A-155773, and B-155789 are typical illustrative drawings of those that
are contract specific, and are made available by the Daktronics project manager. Installation
drawings are also included in the installation kits that co me with the d isp lay section(s).
It is important to have received and reviewed the installation drawings and riser
dia
grams before installation begins. Installation personnel should be familiar with these
drawings and have copies of them on site.
........................................Drawing A-152599
.......................................Drawing A-155773
...............................................Drawing A-113523
ings A-154011, A-151214, A-152954, A-
Note: Daktronics engineering staff must approve any changes made to the display. If any
modifications are made, detailed drawings of the changes must be submitted to Daktronics
for evaluation and approval, or the warranty may be void.
Refer to the shop draw
manager.
ings referenced above, and the other drawings provided by the project
...........................Drawing A-154011
...........................Drawing A-151214
...........................Drawing A-152954
...........................Drawing A-151283
...........................Drawing A-154044
....................................Drawing A-152630
...................Drawing B-155789
2.1 Support Structure Design
The wall, framing members, or structure that will support the Daktronics supplied Zbrackets and display sections are to be designed to support the weight of the
completed system. Review all drawings to determine special requirements and the
total system weight. It is the customer’s responsibility to ensure that the installation
will meet local codes and or standards. Daktronics is not responsible for the
installations or the structural integrity of support structures done by others.
Mechanical Installation
2-1
2.2 Z-Bracket Installation for Sectional Display Mounting
Review all drawings to determine special requirements. Display sections are to be
mounted to a wall or structural frame using Z-shaped aluminum brackets provided
by Daktronics in an installation kit. The Z-brackets allow for one (1) inch of air
space behind the displays for power and signal terminations, and for the
corresponding customer supplied junction boxes. Installation drawings will provide
the necessary dimensions for the mounting of the display, Z-brackets, and power
termination junction boxes.
It is the customer’s responsibility to attach the Z-brackets with the correct am
and type of hardware to support the weight of all display sections mounted to those
Z-brackets as well as the support structure mentioned in Section 2.1. It is the
customer’s responsibility to ensure that the installation will meet local codes and or
standards. Daktronics is not responsible for the installations or the structural
integrity of support structures done by others.
When mounting a display system containing one or multiple rows of display
sectio
ns, the bottom row of displays will require two rows of Z-brackets attached to
the support structure. Upper rows of displays will require only one row of Z-brackets
per row of displays. This is due to the fact that each display section has alignment
pins located on the top of the section that interlo c k into the bottom of the display
section stacked on top of it. It is important to check these pins for tightness before
hanging a display section.
ount
2.3 Electrical Junction Box Installation
Review all drawings to determine special requirements. Installation drawings will
provide the necessary dimensions for the power termination junction boxes. The
contract specific riser diagram will identify power specifications for the display
system. Also read Section 3 for any other pertinent information that may be needed
during the mechanical installation process.
2.4 Hanging Display Sections
Each DataTrac CE-1010 section has threaded insert nut holes on the rear side for the
attachment of mounting brackets. These are required for the hanging of the
individual sections. The mounting brackets come in the installation kit along with
the required ¼-20x3/4 hex head bolts. A drawing or drawings showing the correct
mounting bracket attachment will be included in the installation kit. Drawing A-
155773 illustrates the attachment of mounting brackets.
Hang the section that receives the incoming signal to the bottom
mounted Z-brackets. Subsequent sections are to be mounted to the Z-brackets, as
they are daisy-chained together with signal interconnects per the contract specific
riser diagram and Section 3 for electrical and signal information.
2-2
left side of the
Mechanical Installation
Each section is labeled with an address and X
proper section is mounted to the Z-bracket in the proper place.
Make sure that the mounted Z-brackets have screws attached vertically to each
end to prevent the display sections from sliding off. This is discussed and
illustra
ted in the included install kit drawings.
-Y coordinate. Make sure that the
2.5 Display Ventilation Requirements
Fresh air inlets and exhaust vents should not be obstructed in any way. Using the
Daktronics suggested mounting methods will ensure proper ventilation. If using a
different mounting method, consult a Daktronics sales representative for clearance
requirements regarding the particular display. If ventilation requirements are not
met, the display warranty will be void.
Mechanical Installation
2-3
Section 3: Electrical Installation
3.1 Signal
Cables
The conductor connector used in the
network is an industry standard 6-pin
RJ11 or an 8-pin RJ45. This
connector can be found on many
telephones and LANs.
The cable used in the network is a
standard flat six-conductor telephone
cable (standard flipped cable). Refer
to Figure 4. This cable has one end
that is the mirror image of the other end (i.e. the cable is flipped). Refer to Figure 5
for a standard flipped cable.
Notice in Figure 5 that the color code on one connector must be made the opposite
on the other connector. When installing a network, it is not easy to remember in
which direction the previous end was oriented. One simple way to avoid confusion
is to standardize the color code, having one color for the connector going into the
output of a sign, and the opposite color for a connector going into the input of a
sign. This will help ensure correct cabling since cables are always installed from the
output jack of one sign to the input jack of the next sign.
Figure 4: Six conductor RJ11 Connector and
Cable
Figure 5: Flipped Cable with RJ Connectors
Installing an RJ11 Connector
Installing an RJ11 connector on the end of the sixconductor cable is a simple task when the correct tools are
used. The RJ11 crimping tool (Daktronics part number TH-
1033) performs two separate steps.
First, use the crimping tool to strip the outer insulation from the inner wires. This
does not result in bare wires since only the gray outer jacket is removed. After
correct stripping, the wire will appear as shown in Figure 6.
Electrical Installation
Figure 6: Wire with Outer
Jacket Stripped
3-1
The crimping tool is then used to crimp the RJ11 connector onto the cable. The RJ11
connector is locked into a special socket in the tool. The stripped wire is inserted
into the RJ11 connector. Finally, the tool is squeezed like a pliers to crimp the
connector onto the wire. This completes the installation of an RJ11 connector onto
the wire.
3.2 Power
Reference Drawing:
Generic; System Riser Diagram..................................Drawing A-113523
Power Requirements
Each display system comes with a contract specific riser diagram similar to the
drawing referenced above.
Refer to the specifications sheet for voltage and current requirements. The displays
accept a universal input voltage of 85-265 VAC at 50 or 60 Hz.
Do not connect the display to any voltage other than that listed on the Daktronics
product label attached to the back of the display.
Grounding
Proper grounding is necessary for reliable equipment operation, and provides some
protection to the equipment from damaging electrical disturbances. All of the
displays are supplied with a power cord that contains an earth ground conductor.
Make sure to plug this cord into a grounded outlet. If the proper grounding methods
are not followed, the warranty will be void.
Note: Displays must be earth grounded according to national and local electrical
codes.
3-2
Power Connection – Pluggable Cord Connected Displays
The DataTrac CE-1010 displays are
supplied with an eight (8) foot power cord.
The socket-outlet should be installed near
the equipment and be easily accessible.
Plug the power cord into the socket as
shown in Figure 7.
It is important to check this connector to
make sure it is fully secured before
hanging a display section.
Figure 7: Power Cord Connection
Electrical Installation
3.3 RS422 System
A RS422 system requires a signal converter to connect the first sign to the computer.
1. Plug the serial cable’s 25-pin connector into the signal converter.
2. Plug either the 9-pin or the 25-pin connector (depending on your PC) into
the RS232 COM port to be used.
3. Plug the signal converter’s power cord into a 120 VAC grounded outlet.
4. Plug a flipped phone cable into the “RS422 OUT” of the signal converter
and the opposite end into the “RS422 IN” of the first display.
The “RS422 IN” jack’s pin out is as
follows:
Pin Function
1 N.C.
2 D1OUT-P
3 D1OUT-N
4 D1IN-P
5 D1IN-N
6 N.C.
Figure 8: Output Signal Cable Connection
3.4 Sign to Sign/Section to Section Connections
When wiring the sign to sign network, the cable and connectors discussed earlier in
this section are used. Pay special attention to the information regarding flipped
cables to help ensure a successful installation. The best method of wiring the signs
together is to start at the first sign, as it is designated to begin the n etwork.
1. Plug the cable into the “SIGNAL OUT” output jack of the first sign (refer
to Figure 8) and the other end of the cable into the input jack of the next
sign.
2. Continue this procedure throughout the network. When the wiring is
complete, the last sign will have nothing in the output jack.
3. Before hanging the displays, review Section 2.4.
Electrical Installation
3-3
Section 4: Maintenance and
Troubleshooting
Important Notes:
1. Disconnect power before any repair or maintenance work is
done on the display.
2. Qualified service personnel must make any access to internal
display electronics.
3. Disconnect power when the display is not in use.
Reference Drawings:
Label Detail Drawing, CE-10**-****-*.*, RS422.........................Drawing A-110324
1.2" Displays
Final Assy; CE-1010-****-1.2-RG .............................................Drawing B-110268
Schematic; CE-10**-824/30-1.2-**............................................Drawing B-113015
Schematic; CE-10**-1224/30-1.2-**..........................................Drawing B-113344
2.1" Displays
Final Assy; CE-1010-4**-2.1-SBRG .........................................Drawing B-140722
Final Assy; CE-1010-****-2.1-RG .............................................Drawing B-121808
Schematic; CE-10**-424/30-2.1-**............................................Drawing B-140608
Schematic; CE-10**-824/30-2.1-**............................................Drawing B-121853
Schematic; CE-10**-1224/30-2.1-**..........................................Drawing B-121854
3.2" Displays
Final Assy; CE-1010-****-3.2-RG .............................................Drawing B-146115
Schematic; CE-10**-418/24-3.2-**............................................Drawing B-145059
Schematic; CE-10**-618/24-3.2-**............................................Drawing B-144982
4.2" Displays
Final Assy; CE-1010-****-4.2-RG .............................................Drawing B-110430
Schematic; CE-10**-412/18-4.2-**............................................Drawing B-107790
Schematic; CE-10**-612/18-4.2-**............................................Drawing B-109996
The DataTrac CE-1010 displays are front access. The components within the displays are not
field repairable. In most cases, it is easiest to completely replace the failed part or return it to
Daktronics for repair.
Refer to the project specific shop drawings provided by the project manager.
Maintenance and Troubleshooting
4-1
4.1 Accessing the Interior of the Display
Depending on the overall size of a
display system, sectional displays may
have two sizes of front access
removable panels. Finding the
Daktronics labels on the front of the
display will help in locating the lower
right corner of a display section.
For 1.2" and 2.1" display types, the
module in this corner may either be a
4x6 or 4x12 panel. For 3.2" and 4.2"
displays, the modules are all 2x6
panels. Panels are removed by
accessing ¼-turn fasteners in the
corners of a module panel.
Note: Not every hole has a ¼-turn
fastener. Only the four corner holes of
the module panel do. Refer to Figure
9.
The screwdriver must pass through the
face panel. The ¼-turn screws are
located behind the face panel.
Using a #1 Philips screwdriver, turn
the 4 ¼-turn screws securing the LED
module panel to the cabinet of the
display one-quarter turn counterclockwise. Refer to Figure 9 and
Figure 10. The screws are designed to
remain in the LED module flanges,
but release from the cabinet.
Gently pull the LED module panel
from the body of the display. It will
come forward as a complete unit.
Refer to Figure 9 and Figure 10.
Note: Use caution when removing the
LED module panel. The power wires
and ribbon cable connecting the LEDs
to the inside of the display will still be
connected. Take care not to scratch the
modules wire cloth filter.
Figure 9: Screw Locations
Figure 10: Locating module panel ¼-turn fasteners
Figure 11: Module Panel Removal
4-2
Maintenance and Troubleshooting
To completely remove the LED module panel from the cabinet of the display:
1. Spread the clasps of the 40-
pin connectors on the rear
side of the panel.
2. Gently pull the cable to
disconnect the pin connector
(refer to Figure 12).
3. Disconnect the four-pin
power connectors. The power
cable is released by squeezing
the tabs on each side of the
connector.
Figure 12: LED Module Ribbon Cable Removal
4.2 Display Interior
Once the LED module panel is removed, the display interior is visible. Various
internal components, including the display controller and the power supplies, are
now accessible for repair or replacement.
LED Module Replacement
If any LED modules fail, the recommended
procedure is to replace the failed module,
send it to Daktronics, or send it to a certified
dealer for repair. Refer to Section 4.6 for
information on packaging components for
shipment.
To remove an LED module:
1. Remove the appropriate LED
module panel as described in
Section 4.1.
2. Disconnect the remaining 40-
pin ribbon cable from the failed
module.
3. Removing the wire cloth retainer frame requires the following: For 1.2"
displays, remove the four nuts located along the rear edge of the LED
circuit board. For the 2.1" displays, remove the four perimeter nuts and
one in the center of the circuit board. For the 3.2" and 4.2" displays,
remove the six perimeter nuts and two in the center. Refer to Figure
13.
4. Flip the module panel over and remove the wire cloth filter from the
front of the failed module.
Figure 13: Removing the wire cloth
retainer frame nuts
Maintenance and Troubleshooting
4-3
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