Daktronics CH-1018H User Manual

Auto Racing Display

Model CH-1018H

Installation & Service Manual

ED 6581

ED 6581
Project# 1081
Rev. 3 - 06 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.

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. Mechanical/Electrical 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

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-1018H 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-1018H......................................Drawing A-51504

Drawing A-51504 shows a Daktronics CH-1018H display. The CH-1018H display along
with the use of the Daktronics CHTS-300 timing console will display the lap number and lap
time on the display.

Introduction 1-1

Section 2: Mechanical/Electrical Installation

2.1 General System

Reference Drawings: Driver Enclosure, Power & Signal ...............Drawing A-37915

Mounting Instructions..................................Drawing A-38856

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

System Layout, CH-1018H .........................Drawing A-51505

Component Locations, CH-1018H..............Drawing A-51511

Electrical Installation, CH-1018H................Drawing A-51519

Footing & Beams, CH-1018H......................Drawing A-51520

Refer to Drawing A-51505 for a general system layout.

The general procedure for installing the CH-1018H display is as follows:

1. Select beam and footing recommendations from the table below.

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

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

4. Mount the displays to the beams as described in Section 2.3 and Drawings A-38856 and
A-51520.

5. Route power and signal wires into the displays as described in Section 2.4 and Drawings
A-37915, A-47207, A-51511, and A-51519.

2.2 Beam and Footing Selection

Reference Drawing: Footing and Beams, CH-1018H ....................Drawing A-51520

The table below contains recommendations for W-shape beams and footings to support the
display as shown in Drawing A-51520. 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.

The beams listed below are beams which provide maximum wind load strength for the weight
and cost of the beams.

Wind

Speed

70 mph 10 W8 x 15 4 ¾ ft x 3 ft

15 W6 x 20 5 ½ ft x 3 ft

80 mph 10 W8 x 15 5 ½ ft x 3 ft

15 W8 x 20 6 ¾ ft x 3 ft

90 mph 10 W8 x 17 6 ¼ ft x 3 ft

15 W8 x 24 7 ft x 3 ft

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 300 psf per foot of depth in
natural grade was used to derive these figures.

Height

(ft)

Beam

Section

Footing

Depth x Dia.

Installation

2-1

The footing recommendations are based on the allowable soil bearing pressure of 3000 psf
vertically and 300 psf/ft of depth horizontally. However, these recommendations are
suggestions only and soil bearing pressure at the site must be determined by a sample test prior
to specifying actual footings. Be sure that the installation complies with local codes and is
suitable for the particular soil and wind conditions. Daktronics assumes no responsibility for
structures installed by others. Daktronics recommends that W-sections of grade 35 steel be used
for beams, and that 28-day (strength 3000 psi) concrete be used for footings.

A note about beam nomenclature: For a typical beam, W6 x 12 for example "W" stands for
"Wide-Flange Beam". The first number (6) is the approximate front to rear dimension of the
beam in inches. The second number (12) is the weight per foot in pounds. This numbering is a
standard in the steel industry. Widths are from 6.00 to 8.00 inches in the chart above.

2.3 Display Mounting

Reference Drawing: Mounting Instructions ....................................Drawing A-38856

Drawing A-38856 shows the typical mounting for the display.

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

both sides of the beam to clamp the display to the beams.

A mounting kit consisting of mounting angles and 1/2" hardware are provided to mount the
display.

Position the display against the mounting beams and secure the bottom of the display to both
beams as shown. Next, secure the top of the display. Once mounting angles are attached, the
display may be slid up or down to the desired height. Once positioned as desired, tighten all
bolts.

2.4 Electrical Installation

2.4.1 Control Signal Cable

Reference Drawings: Driver Enclosure, Power & Signal....Drawing A-37915

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 in the cover according to
the table below and Drawing A-47207.
At the display, open the bottom hinged panel covering the entrance enclosure as
shown on Drawing A-51511. Remove the cover from the entrance enclosure. Refer

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

Component Locations,CH-1018H...Drawing A-51511

2-2

Installation