Daktronics CH-2024V User Manual

Auto Racing Display

Model CH-2024V

Installation & Service Manual

ED 5900
Project#1081
Rev. 5-10 August, 1998

Copyright © 1991 Daktronics, Inc.

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.

ED 5900

DA
KTRONICS, INC.

Setting New Standards Worldwide

P.O. Box 5128 331 32nd Ave. Brookings, SD 57006
Phone [phone] or [phone] Fax [phone]

Table of Contents

1. Introduction .............................................................................................................1-1

1.1 How To Use This Manual ..........................................................................................1-1

1.2 Display Overview.......................................................................................................1-1

2. Installation ...............................................................................................................2-1

2.1 General System...........................................................................................................2-1

2.2 Beam and Footing Selection.......................................................................................2-1

2.3 Display Mounting.......................................................................................................2-2

2.4 Electrical Installation..................................................................................................2-2

2.4.1 Control Signal Cable.....................................................................................2-2

2.4.2 Power Wiring ................................................................................................2-3

2.4.3 Connection Between Sections.......................................................................2-3

3. Maintenance & Troubleshooting............................................................................3-1

3.1 Lamp Replacement.....................................................................................................3-1

3.2 Lamp Driver...............................................................................................................3-1

3.3 Digit Segmentation.....................................................................................................3-2

3.4 Schematic ...................................................................................................................3-2

3.5 Troubleshooting .........................................................................................................3-2

3.6 Replacement Parts......................................................................................................3-3

3.7 Unit Exchange/Replacement Procedure.....................................................................3-3

Table of Contents i

Section 1 : Introduction

1.1 How To Use This Manual

This manual explains the installation and maintenance of the Daktronics CH-2024V auto
racing display system. Setup of other control equipment or operation of the CHTS-300 timing
console are not covered in this manual. 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.

Important Safeguards:

1. Read and understand these instructions before installing.

2. Do not drop the control console or allow it to get wet.

3. Be sure the display is properly grounded with a ground rod at the display location.

4. Disconnect power to the display when it is not in use.

5. Disconnect power when servicing the display.

6. Do not modify the display structure or attach any panels or coverings to the

display without the written consent of Daktronics, Inc.

The box below illustrates Daktronics drawing numbering system. The drawing number
“7087-P08A-69945” is how Daktronics identifies individual drawings. This number is
located in the lower-right corner of the drawing. This manual refers to drawings by listing the
last set of digits and the letter preceding them. In the example below, the drawing would be
referred to as Drawing A-69945. Referenced drawings are inserted at the end of the first

section which references them

1.2 Display Overview

Reference Drawing: Display, CH-2024V........................................Drawing A-46493

Drawing A-46493 shows a Daktronics CH-2024V display. The CH-2024V display along
with the use of the Daktronics CHTS-300 timing console can display the lap number or
elapsed race time, the top eight racers, and the race status.

Introduction

1-1

Section 2 : Installation

2.1 General System

Reference Drawings: Footing & Beam, CH-2024V.........................Drawing A-46492

System Layout, CH-2024V...........................Drawing A-46533

Display Mounting, CH-2024V.......................Drawing A-46534

Component Locations, CH-2024V................Drawing A-46539

Pwr&Sig Entrance Components...................Drawing A-46545

Connector Plate, CH-2024V.........................Drawing A-46563

Color Code, 25 Pin J-Box.............................Drawing A-47207

Electrical Installation, CH-2024V..................Drawing A-47326

The CH-2024V display consists of three sections, the upper, middle and lower sections.
Refer to Drawing A-46533 for the general system layout.

The general procedure for installing the CH-2024V display is as follows:

1. Select beam and footing recommendations from the table in Section 2.2.

2. Dig the footing holes and install the beams and the footings.

3. Route power and signal cables to the display and the control locations.

4. Mount the displays to the beams as described in Drawings A-46492 and A-46534 and
Section 2.3.

5. Route power and signal wires into the displays as described in Drawings A-47326, A­46539, A-46545, A-46563 and A-47207 and Section 2.4.

2.2 Beam and Footing Selection

The table below contains recommendation for beams and footings to support your display.
The first column is wind velocity in miles per hour. The distance in the second column is
from the ground to the bottom of the display. The choice from these columns depends upon
the display location.

Wind Speed Height (ft) Beam

70 10 W 10x19 7 ½ ftx3 ft

MPH 15 W 10x25 8 ¼ ftx3 ft

80 10 W 10x25 8 ½ ftx3 ft

MPH 15 W 10x29 9 ¼ ftx3 ft

90 10 W 14x26 9 ½ ftx3 ft

MPH 15 W 12x31 10 ½ ftx3 ft

The beams listed are W-shape (wide flange) beams which provide maximum wind load
strength for the weight and the cost of the beams.

The calculations for footing diameters and depths are based on the assumption that footings
are in undisturbed soils, not fill soils. Lateral bearing capacity of 400 psf per foot of depth in
natural grade was used to derive these figures.

Section

Footing Depth x

Diameter

Installation

2-1

These footing recommendations are based on an allowable soil bearing pressure of 4000 psf
vertically and 400 psf/ft of depth horizontally. However, these recommendations are
suggestions only and each installation should be treated individually. Be sure that the
installation complies with local codes and is suitable for particular soil and wind conditions.
Daktronics assumes no responsibility for structures installed by others. Daktronics
recommends that W-sections of grade 36 steel be used for beams, and that 28-day (strength
4000 psi) concrete be used for footings.

2.3 Display Mounting

Reference Drawings: Display Mounting, CH-2024V.......................Drawing A-46534

Drawing A-46534 shows the typical mounting procedure for the display.

Note: The bolts that secure the display do not go through the beams, but run along both sides

of the beams, clamping the display to the beams.

Mounting angles and 1/2" hardware are provided to mount your display.

1. Starting with the bottom display section, lift the display into place on the mounting

beams.

2. Secure the bottom of the lower display section as shown in Steps 1 through 4 in Drawing
A-46534.

3. Secure the top of the display section with the mounting angles and the 1/2" hardware.

4. Tighten all nuts securely.

5. Repeat the same procedure for the middle and upper sections, starting with the middle

section next.

2.4 Electrical Installation

2.4.1 Control Signal Cable

Reference Drawings: Component Locations, CH-2024V...Drawing A-46539

Pwr&Sig Entrance Components......Drawing A-46545

Color Code, 25 Pin J-Box................Drawing A-47207

For the display, two conductors of 24 AWG are needed. For distances up to 600 ft. or
22 AWG, up to 1000 ft. are required. Daktronics has 24 AWG direct burial cable,
Daktronics part no. W-1105 with 6 conductors, and 22 AWG cable that must be
pulled through the conduit before burial, Daktronics part no. W-1077 with 2
conductors.

At the control location, mount the signal J-box to a convenient location. Route the
cables and connect to the wires leading from the connector into the J-Box cover
according to the table below and Drawing A-47207.

At the display’s bottom section, open the bottom hinged panel covering the entrance
enclosure as shown in Drawing A-46539. Remove the cover from the entrance
enclosure. Refer to Drawing A-46545 for an illustration of the components inside
the enclosure. Signal and power cables are routed into the rear of the display. There
are two knockouts for the conduit connection in the back of the bottom section. Refer

2-2

Installation

to Drawing A-46539. Connect the signal wires to TB31 as indicated in the table
below.

Control End Display End

J-box Terminal

Wire Color Output No. TB31 Terminal No.

No.

14 Red/Wht 1* 1 (+)
15 Grn/Wht 2 (-)
16 Blue/Wht 2* 4 (+)
17 Blk/Red 5 (-)

*Auxiliary display(s) require(s) a different output number(s). Consult your CHTS-300
console manual.

2.4.2 Power Wiring

Reference Drawings: Pwr&Sig Entrance Components ......Drawing A-46545

The CH-2024V display requires a 120/240 VAC circuit, at 50 amps per line when
equipped with 25W lamps, with a maximum current draw of 87 amps. When
equipped with 30W lamps a 120/240 VAC circuit, at 60 amps per line, with a
maximum current draw of 103 amps.

Route power wires into the display and connect to TB41 in the entrance enclosure, as
shown in Drawing A-46545.

Connect the ground wires to E41 and to a ground rod near the display according
to local codes.

2.4.3 Connection Between Sections

Reference Drawing: Component Locations, CH-2024V......Drawing A-46539

Connector Plate, CH-2024V...............Drawing A-46563

There are several digit harnesses located near a 3" hole at the bottom of the upper
section and the top of the lower section that must be routed to the connector plate
located at the bottom of the middle section as shown in Drawing A-46539.

1. Open the access doors and route these harnesses through the 3" holes provided at

the top, bottom and middle of the middle section.

2. Remove the cover from the connector enclosure.

3. Connect the plugs on the digit harnesses to the mating jacks in the connector
plate. Refer to Drawing A-46563.

4. Match the numbers on the plugs with the numbers next to the jacks in the

connector plate.

Included with the digit harnesses is a 4-pin plug labeled "A1-17" (refer to Drawing
A-46545) which is the signal to the lamp driver (A1). Also included is a 9-pin plug
labeled "A1 Power" which is the power to the lamp driver "A1".

Connect the 4-Pin plug (A1-17) from the entrance to the 4-Pin jack located next to the
connector panel. Connect the 9-pin plug labeled "A1 Power" to the 9-pin jack labeled
"A1 Power" in the connector panel.

Installation

2-3

Power and signal wires from the lamp driver (A2) to the entrance are already
connected.

2-4

Installation

Section 3 : Maintenance & Troubleshooting

IMPORTANT NOTES:

1. Disconnect power 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. Disconnect power when the display is not in use.

3.1 Lamp Replacement

Reference Drawing: Digit Service ..................................................Drawing A-27674

The primary service required by the CH-2024V display is to replace burned-out lamps. Refer
to Drawing A-27674 for an illustration of how to access the digit lamps for replacement.
Standard replacement lamps for the digits are 120V, 25W frosted medium base and may be
obtained at your local store or directly from Daktronics, part number DS-1029. Some displays
may be equipped with 120V, 30W reflector type 30R20 lamps, Daktronics part number DS-

1126.

The Lap/Time indicators use 120V, 55W clear flood lamps, type 55PAR38, Daktronics part
number DS-1101.

The Status indicators use 120V, 85W flood lamps, type 85PAR38. The Daktronics part
numbers are as follows:

Color Part Number

Amber DS-1184
Green DS-1185
Red DS-1186

Do not use lamps larger than those originally installed in the display. Using higher powered
lamps will likely cause fuse failures in the display and could exceed the current levels that the
display's circuits can safely handle.

3.2 Lamp Driver

Reference Drawings: Lamp Driver, 16 Col. W/ Fan.......................Drawing A-37070

Component Locations, CH-2024V ..............Drawing A-46539

In the display, the task of switching lamps on and off is performed by the lamp driver.

Drawing A-46539 in Section 2 shows the location of the lamp drivers in the display.
Drawing A-37070 is an illustration of the lamp driver and the fuses located in it.

The lamp driver has 22 connectors providing power and signal inputs and outputs to the
digits. The functions of these connectors are as follows:

Connector No. Function

1-16 Outputs to digits

Maintenance & Troubleshooting

3-1

17 Signal Input
18 Power input for outputs 1-8 (120V)
19 Power input for driver logic and fan (120V)
20 Power input for outputs 9-16 (120V)
24 Dim option selector

In Drawing A-46539, the numbers on the digits refer to the lamp driver output connector
wired to each digit.

3.3 Digit Segmentation

Reference Drawing: Segments, 4x7 Lamp Matrix Digit..................Drawing A-37685

In a digit certain lamp always go on and off together. These groupings of lamps are known as
"segments". Each digit has eight segments, referred by letters A through H. Drawing A-
37685 illustrates these segments and shows which connector pin and wire color is wired to
each segment.

3.4 Schematic

Reference Drawing: Schematic, Pwr&Sig, CH-2024V....................Drawing A-46437

Pwr&Sig Entrance Components ....................Drawing A-46545

The schematic diagram in Drawing A-46437 shows the power and signal inputs into the
display and to the lamp driver. The component numbers correspond to those shown in
Drawing A-46545.

3.5 Troubleshooting

This is a list of possible problems that may occur and their possible solutions.

Observed Problem Possible Cause

One lamp won’t light

Digit segment won’t light

Entire digit won’t light

Half the display won’t light

• Burned-out lamp

• Broken wire behind digit

• Broken wire

• Poor contact at driver connector

• Internal driver malfunction

• Broken wire

• Poor contact at connector, pin 7

• Fuse blown in driver

• Service breaker tripped

• Main fuse blown

• Poor contact at main power

connection

• P18 disconnected

3-2

Maintenance & Troubleshooting

Entire display won’t light

• Power disruption

• Poor signal connection

• Driver logic fuse blown

• Control not connected to display

• P20 disconnected

Segment stays lit

• Broken wire behind digit

• Internal driver malfunction

Garbled display

• Control malfunction

• Internal driver malfunction

If a problem is observed in one digit, the cause may be isolated by swapping plugs on the
driver (connect the plug from the digit into a different jack). If the same digit shows the same
problem, the cause may be in the digit or the wiring. If the problem moves to another digit,
then the cause is probably an internal driver problem.

Use a volt meter at driver inputs to determine if power is being supplied to the driver. An
ohmmeter can be helpful in finding broken wires and bad connections. Internal electronic
problems must be corrected by Daktronics or an authorized service center.

3.6 Replacement Parts

Part Number of Description Type Part Number

Lamp Driver 0A-1033-0122
J-Box, CHTS-300 Timer 0A-1067-0056
Fuse, Main Power, 20A FNW-20 F-1016
Fuse, Lamp Driver, 10A AGC-10 F-1006
Fuse, Driver Logic, 1/2A AGC-1/2 F-1000
Digit Lampbank, 24” 4x7 0A-1027-0071
Digit Screen, 24” 4x7 0S-1064-0002
Socket, Med. Base X-1046
Lamp, 25W Frosted DS-1029
Lamp 30W Reflector 30R20 DS-1126
Lamp, 55W Clear Flood 85PAR38 DS-1101
Lamp, 85W Amber Flood 85PAR38 DS-1184
Lamp, 85W Green Flood 85PAR38 DS-1185
Lamp, 85W Red Flood 85PAR38 DS-1186

3.7 Unit Exchange/Replacement Procedure

Daktronics unique exchange program offers our clients the quickest, most economical way of
receiving product repairs. If a component fails, Daktronics will send the customer a
replacement. The customer, in turn, sends the failed component to Daktronics. This not only
saves money but decreases the time the display is inoperable. Daktronics offers repair and
return on a timely basis; in urgent situations, every attempt is made to ship by the fastest
transit method available.

1. Packaging for Return: Package and pad the item well to prevent damage during

shipment. Electronic components, such as printed circuit boards, should either be
installed in an enclosure or placed in an anti-static bag before boxing.

Maintenance & Troubleshooting

3-3

Please enclose your name and address along with a list of all the symptoms. Please be

as specific as possible.

2. Driver Packaging Instructions: Drivers should be placed in a static-free enclosure

for return shipping. An anti-static convoluted foam packing is available from
Daktronics (part number PK-1135). The shipping box (Daktronics part number PK-

1006) should be used along with the foam.

3. Where to Send: Contact your local representative prior to shipment to acquire a

Return Material Authorization Number (RMA#). This will speed up the repair of
your unit.

When returning defective items under the exchange program, please use the UPS Blue
Return Tags found in the package containing the exchange unit sent from Daktronics.
This will speed up the transaction and help avoid confusion when the part is returned
to Daktronics. The defective item must be returned within 15 days of receiving a
replacement part. Using the UPS Blue Return Tag immediately will eliminate the
possibility of late charges being assessed against your account.

Mail: Daktronics, Inc., Customer Service
PO Box 5128
331 32

nd

Avenue

Brookings, SD 57006

Phone: Toll Free: 1-800-843-9879
or 1-605-697-4400

Customer Service Fax: [phone]

E-Mail: [e-mail]

3-4

Maintenance & Troubleshooting