Daktronics CH-1421V Mode d’emploi

ED-6401

Project#1081

Rev. 2 - 10 August, 1998

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

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publisher.

KTRONICS, INC.

Auto Racing Display

Model CH-1421V

Installation & Maintenance Manual

ED 6401

Setting New Standards Worldwide

P.O. Box 5128 331 32nd Ave. Brookings, SD 57006

Phone (605)697-4400 or (800) 843-9879 Fax 697-4444

Table of Contents i

Table of Contents

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

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

1.2 Scoreboard Overview.................................................................................................1-1

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

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

2.2 General System...........................................................................................................2-1

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

2.4 Electrical Installation..................................................................................................2-3

2.4.1 Control Signal Wiring...................................................................................2-3

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

2.4.3 Grounding......................................................................................................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

Section 1 :Introduction

1.1 How To Use This Manual

This manual explains the installation and maintenance of the CH-1421V 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 Scoreboard Overview

Reference Drawing: Specifications Drawing; CH-1421V .............Drawing A-106019

Daktronics offers a wide variety of displays for oval and road tracks. The CH-1421V auto

racing display shown in Drawing A-106019 displays lap number or elapsed race time, the top

five racers and race status.

Introduction

1-1

Installation

2-1

Section 2 :Installation

2.1 General System

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

System Layout ............................................Drawing A-38865

Power wiring and grounding .......................Drawing A-45220

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

Shop Dwg, Mounting Details.......................Drawing A-49278

Component Numbering, CH-1421V..........Drawing A-106020

An illustration of the overall system layout for the CH-1421V is shown in Drawing A-38865.

A typical installation depicting beams, footings, and wiring conduit is illustrated in Drawing

A-49278. The general procedure for installing the CH-1421V 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 as described in Section

2.4.

4. Mount the display to the beams as described in Drawing A-49278.

5. Route power and signal wires into the display as described in Drawings A-37915, A-

38865, A-45220, A-47207, and A-106020.

2.2 General System

Reference Drawing: Shop Dwg, Mounting Details.........................Drawing A-49278

The table below contains recommendations for W-shape beams and footings to support the

display. Refer to Drawing A-49278. 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 Height

(ft) Beam

Section Footing

Depth x Dia.

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.

The footings 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

Installation

2-2

prior to specifying the actual footings. Be sure that the installation complies with local codes

and is suitable for particular soil and wind conditions. Daktronics assumes no responsibility

for displays installed by others. Daktronicsrecommends that W-sections of grade 36 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, W8x24 for example, “W” stands for

“Wide-Flange Beam”. The first number (8) is the approximate front to rear dimension of the

beam in inches. The second number (24) is the weight per foot in pounds. This numbering is

a standard in the steel industry. Widths are from 6.00 to 8.125 inches in the chart above.

Note: Recommendations for a single rectangular structural steel tube and footing to support

the display as shown in Drawing A-49278 must be determined by a qualified structural

engineer using data from a soil sample test at the site.

2.3 Display Mounting

Reference Drawing: Shop Dwg, Mounting Details.........................Drawing A-49278

Drawing A-49278 shows the typical mounting for the display.

Note: The bolts that secure the display to the beam(s) do not go through the beam(s), but run

along both sides of the beam, clamping the display to the beam(s).

A mounting kit consisting of mounting angles and ½” hardware are provided to mount the

display.

1. Locate and mark where the center of the beams will be on the back of the display

mounting channel if it is different from the c-c distance shown in Drawing A-49278 and

the table above.

2. Drill 9/16” holes in the mounting channel on the back of the display at a distance of plus

or minus 3.50” or 4.50” from the location which each beam center was marked if it is

different from the c-c distance shown in Drawing A-49278 and the table above.

3. Position the display at the front of the beams with the threaded rods extending from the

rear of the mounting channels, straddling the beams. Raise the display to the desired

height.

4. Slide clamping channels over the ends of the rods and loosely install washers and nuts.

5. Make final adjustments in the positioning of the display.

6. Make sure that the threaded rods are perpendicular to the display and tighten all of the ½”

nuts.

Installation

2-3

2.4 Electrical Installation

2.4.1 Control Signal Wiring

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

Component Numbering,CH-1421V..DrawingA-106020

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-106020. Remove the cover from the entrance enclosure. Refer

to Drawing A-47207 for an illustration of the components inside the entrance

enclosure. Connect the signal wires to TB31 as indicated in the table below.

Control End Display End

J-box Terminal No. Wire Color Output No. TB31 Terminal No.

14 Red/Wht 1* 1 (+)

15 Grn/Wht 2 (-)

*Auxiliary display(s) require(s) a different output no.(s). Consult your CHTS-300 console

manual.

2.4.2 Power Wiring

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

The CH-1318V display requires a 120/240 VAC, 30 amp circuit per line. When

equipped with 25W lamps, the maximum current draw is 33.33 amps. When

equipped with 30 W reflector lamps, the maximum current draw is 40 amps.

Route power wires into the display and connect to TB41 in the entrance enclosure, as

shown on Drawing A-37915.

Connect the ground wire to E41 and to a ground rod near the display, according to the

local codes.

2.4.3 Grounding

Reference Drawing: Power Wiring and Grounding.............Drawing A-45220

The display must be connected to an earth-ground. Proper grounding is necessary for

reliable equipment operation. It also serves to provide protection to the equipment

against damaging electrical disturbances and lightning. If the following grounding

methods are not adhered to, the warranty will be void.

Installation

2-4

The steel support structure for the display cannot be used as grounding. The support

is generally imbedded in concrete, and if in earth, the steel is either primed or it

corrodes making it a poor ground. Use one ground rod at each scoreboard support

column.

The National Electrical Code requires the use of lockable power disconnect near the

display. Provide a lockable disconnect switch (knife switch) at the display location so

that all power lines can be completely disconnected. Use a 3-conductor disconnect so

that both hot lines and the neutral can all be disconnected. This is important in

protecting the display against lightning.

There are two considerations for power installation, New Power Installation and

Existing Power Installation. These two power installations differ slightly, as

described below.

New Power Installation: The power cable must contain a separate earth-ground

conductor. When a separate ground conductor is used, do not connect neutral to

ground at the disconnect or at the display. To do so would violate electrical codes and

void the warranty. Refer to Drawing A-45220.

Existing Power Installation: When a separate ground conductor is not available,

connect the neutral to the earth-ground at the disconnect. Refer to Drawing A-45220.

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