Elo TouchSystems IntelliTouch, SecureTouch User Manual

Elo IntelliTouch®/SecureTouch

Touchscreen Guide

Revision B

P/N 0082 12M

Elo TouchSystems, Inc.

1-800-ELOTOUCH
www.elotouch.com

Copyright © 1989, 1992, 1995, 1996, 2001 Elo TouchSystems Inc.

All Rights Reserved.

No part of this p ublic ation ma y be repr oduce d, tra nsmitte d, transc ribe d, stor ed in a ret rieval system,
or translated into any langu age or computer language, in any form or by any means, including, but not
limited to, electronic, magnetic, optical, chemical, manual, or otherwise without prior written permis­sion of Elo TouchSystems.

Disclaimer

The informat ion in this docum ent is subje ct to change with out notice . Elo TouchSystems make s no
representations or warranties with respect to the contents hereof, and specifically disclaims any
implied warranti es of mer chanta bilit y or fitness for a parti cular purp ose. El o TouchSystems rese rves
the right to rev ise th is pu blic a tio n and to mak e ch ang e s fr om t im e to t im e in the c o nten t h er eof w i th­out obli gation of Elo TouchSystems to not ify any person of such revi s ions or changes.

Trademark Acknowledgments

iTouch, IntelliTouch, SecureTouch, AccuTouch, Entuitive, MonitorMouse, ELODEV, and SmartSet
are trademarks of Elo TouchSystems, Inc.

Other product names mentioned herein may be trademarks or registered trademarks of their respec­tive companies. Elo TouchSystems claims no interest in trademarks other than its own.

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C

HAPTER

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I

NTELLITOUCH

Except as otherwise stated herein or in an order acknowledgment delivered to
Buyer, Seller warrants to Buyer that the Product shall be free of defects in
materials and workmanship. The warranty for IntelliTouc h touchs creens is 10
years and for IntelliTouch controllers 5 years.

Seller makes no warranty regarding the model life of components. Seller’s
suppliers may at any time and from time to time make changes in the
components deliver ed as Products or components.

Buyer shall notify Seller in writing promptly (and in no case later than thirty
(30) days after discov ery) of the failure of any Product to conform to the
warranty set forth above; shall describe in commercially reasonable detail in
such notice the symptoms assoc iated with such failure; and shall provide to
Seller the opportun ity to inspect such Products as installed, if possible. The
notice must be received by Seller during the Warranty Period for such product,
unless otherwise directed in writing by the Seller. Within thirty (30) days after
submitting such noti ce, Bu yer shall package the allegedly defective Product in
its original ship ping carton(s) or a functional equivalent and shall ship to Seller
at Buyer’s expense and risk.

Within a reasonable time after receipt of the allegedly defective Product and
verification by Seller that the Product f ails to meet the warranty set for th above,
Seller shall corr ect such failure by, at Seller’s options, either (i) modifying or
repairing t he Product or (ii) rep lacing the Product. Such modification, repair, or
replacement and the return shipment of the Product with minimum insurance to
Buyer shall be at Se ller’s expense. Buye r shall be ar the r isk of loss or damage in
transit, and may insure the Product. Buyer shall reimburse Seller for
transportat ion cost incurred for Product returned but not found by Seller to be
defective. Modifi cati on or repair, of Products may, at Seller’ s option , take place
either at Seller ’s facilities or at Buyer’s premises. I f Seller is unable to modify,
repair, or replace a Product to conform to the warranty set forth above, then
Seller shall, at Seller’s option, either refund to Buyer or credit to Buyer’s
account the purchase price of the Product less depreciation calculated on a
straight-line basis over Seller’s stated Warranty Period.

10-Y

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W

ARRANTY

iii

THESE REMEDIES SHALL BE THE BUYER’S EXCLUSIVE REMEDIES
FOR BRE ACH OF WARR ANTY. EXCE PT FOR THE EXPRESS
WARRANTY SET FORTH ABOVE, SELLER GRANTS NO OTHER
WARRANTIES, EXPRESS OR IMPLIED BY STATUTE OR OTHERWISE,
REGARDING THE PRODUCTS, THEIR FITNESS FOR ANY PURPOSE,
THEIR QUALITY, THEIR MERCHANTABILITY, THEIR
NONINFRINGEMENT, OR OTHERWISE. NO EMPLOYEE OF SELLER
OR ANY OTHER PARTY IS AUTHORIZED TO MAKE ANY WARRANTY
FOR THE GOODS OTHER THAN THE WARRANTY SET FORTH
HEREIN. SELLER’S LIABILITY UNDER THE WARRANTY SHALL BE
LIMITED TO A REFUND OF THE PURCHASE PRICE OF THE PR ODUCT.
IN NO EVENT SHALL SELLER BE LIABLE FOR THE COST OF
PROCUREMENT OR INSTALLATION OF SUBSTITUTE GOODS BY
BUYER OR FOR ANY SPECIAL, CONSEQUENTIAL, INDIRECT, OR
INCIDENTAL DAMAGES.

Buyer assumes the risk and agrees to indemnify Seller against and hold Seller
harmless from all liability relating to (i) assessing the suitability for Buyer’s
intended use of the Product s and of any system design or drawing and (ii)
determining the complia nce of Buyer’s use of the Products with applicable
laws, regulations, codes, and standards. Buyer retains and accepts full
responsibil ity for all warranty and other claims relating to or arising from
Buyer’s products, which include or incorporate Products or componen ts
manufactured or supplied by Seller. Buyer is solely responsible for any and all
representations and warranties regarding the Products made or authorized by
Buyer. Buyer will indemnify Seller and hold Seller harmless from any liability,
claims, los s, cos t, or expe nses (inc lu ding rea sonable a tto rney’s fees) a ttribu table
to Buyer’s products or representations or warranties concerning same.

iv

Table of Contents

IntelliTouch 10-Year Warranty. . . . . . . . . iii

Chapter 1

IntelliTouch Technology . . . . . . . . . . . . 1-1

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

The IntelliTouch Touchscreen . . . . . . . . . . . . . . 1-2

The IntelliTouch Controller. . . . . . . . . . . . . . . . . 1-3

Driver Software . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Agency Approvals . . . . . . . . . . . . . . . . . . . . . . .1-4

Chapter 2

Component Installation. . . . . . . . . . . . . 2-5

Safety Information. . . . . . . . . . . . . . . . . . . . . . . 2-5

Work Area. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Protective Clothing . . . . . . . . . . . . . . . . . . . . 2-6

Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Design Consider ations for CRTs and LCDs . . . 2-6

Bezel Design . . . . . . . . . . . . . . . . . . . . . . . .2-7

CRT Integration. . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Safety Information . . . . . . . . . . . . . . . . . . . . 2-8

Definition of Terms:. . . . . . . . . . . . . . . . . . . . 2-9

Suggested Tools. . . . . . . . . . . . . . . . . . . . . . 2-9

Summary of Installation Steps . . . . . . . . . . 2-10

Incoming Inspection . . . . . . . . . . . . . . . . . . 2-11

Unpacking the Touchscreen . . . . . . . . .2-11

Testing the Monitor . . . . . . . . . . . . . . . . 2-11

Disassembling the Monitor. . . . . . . . . . . . .2-11

Remove the Back Case. . . . . . . . . . . . . 2-12

Discharge the CRT . . . . . . . . . . . . . . . . 2-12

Remove the Ele ctronic Chassis. . . . . . .2-13

Remove the CRT. . . . . . . . . . . . . . . . . . 2-15

Verify Touchscreen Fit . . . . . . . . . . . . . . 2-16

Attaching the Touchscreen. . . . . . . . . . . . . 2-18

Spacing the CRT from the Bezel . . . . . . . . 2-20

Installing the Controller. . . . . . . . . . . . . . . . 2-21

Internal Serial Controller (2500S) . . . . . 2-22

External Serial Controller. . . . . . . . . . . . 2-25

Internal USB Controller (2500U) . . . . . .2-27

Routing the Touchscreen Cables . . . . . . . . 2-29

Reassembling th e Mo n ito r . . . . . . . . . . . . .2-29

Sealing the Monitor . . . . . . . . . . . . . . . . . . . . .2-30

Sealing Material Selection . . . . . . . . . . . . . 2-31

System Evaluation . . . . . . . . . . . . . . . . . . . 2-31

LCD Integration . . . . . . . . . . . . . . . . . . . . . . . .2-32

Safet y Informatio n. . . . . . . . . . . . . . . . . . . 2-32

Summary of Installati on Steps. . . . . . . . . . 2-33

Unpacking the Touchscreen . . . . . . . . . . . 2-33

Testing the Monitor . . . . . . . . . . . . . . . . 2-33

Disassembling the LC D Monitor . . . . . . . . 2-34

Definition of Terms . . . . . . . . . . . . . . . . 2-34

Tools and Equipment . . . . . . . . . . . . . . 2-35

Required Parts for Serial Connection . . 2-35
Required Parts for USB Connection. . . 2-35
Optional Parts for Serial Connection. . . 2-36

Optional Parts for USB Connection . . . 2-36

Notes on Disassembling the Monitor. . . . . 2-36

Removing the Rear Case . . . . . . . . . . . . . 2-37

Removing the LCD . . . . . . . . . . . . . . . . . . 2-37

Determining Touchscreen Fit. . . . . . . . . . . 2-38

Mounting the Touchscreen. . . . . . . . . . . . . 2-39

Sealing. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-41

Spacing the LCD from the Bezel. . . . . . . . 2-41

Installing the Controller . . . . . . . . . . . . . . . 2-42

Internal Serial Controller (2500S). . . . . 2-42

Internal USB Controller (2500U). . . . . . 2-43

Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-44

Parasitic Tap of 5Vdc . . . . . . . . . . . . . . 2-44

Parasitic Tap of 7-30Vdc (DC to DC

converter) . . . . . . . . . . . . . . . . . . . . . . . 2-45

Modifying the Case for Serial Output. . . . . 2-46

Modifying the Case for USB Output. . . . . . 2-46

Re-assembling the Display . . . . . . . . . . . . 2-47

Appendix A

Troubleshooting Guide. . . . .A-49

The Troubleshooting Proc ess. . . . . . . . . . . . . A-49

Display Problems . . . . . . . . . . . . . . . . . . . . . . A-50

Software Troubleshooting . . . . . . . . . . . . . . . . A-50

Video Alignmen t Problems . . . . . . . . . . . . A-51

Hardware Troubleshooting . . . . . . . . . . . . . . . A-51

Serial Controller. . . . . . . . . . . . . . . . . . . . . A-52

Using the COMDUMP Utility. . . . . . . . . A-52

2500S Controller Protocol . . . . . . . . . . . . A-53

A-4002 Controller Protocol . . . . . . . . . . . A-53

RS-232 Connection s. . . . . . . . . . . . . . . A-54

Po wer Connections. . . . . . . . . . . . . . . . A-55

Touchscreen and Touchscreen Cables. . . . . . A-56

IC1 Cable . . . . . . . . . . . . . . . . . . . . . . . A-57

EC2 Cable. . . . . . . . . . . . . . . . . . . . . . . A-57

v

Diagnostic LED's . . . . . . . . . . . . . . . . . . . .A-58

IntelliTouch Serial Controllers . . . . . . . .A-58

Diagnostic Codes . . . . . . . . . . . . . . . . . . . .A-59

IntelliTouch Serial Controller (2500S) . .A- 59

DB9 and DB25 Connector Pin Positions . .A-60

Appendix B

Specifications . . . . . . . . . . . .B-61

IntelliTouch Touchscreens. . . . . . . . . . . . . . . .B-62

IntelliTouch 2500U USB Controller . . . . . . . . .B-64

LED Diagnostic Characteristics. . . . . . .B-68

Agency Approvals. . . . . . . . . . . . . . . . . . . .B-68

2500U USB Controller Drawings . . . . . . . .B-69

IntelliTouch 2500S Serial Controller . . . . . . . .B-71

Jumper Settings. . . . . . . . . . . . . . . . . . .B-75

LED Diagnostic Characteristics. . . . . . .B-75

Agency Approvals. . . . . . . . . . . . . . . . . . . .B-76

Drawings. . . . . . . . . . . . . . . . . . . . . . . . . . .B-77

Appendix C

Elo Part Numb ers . . . . . . . . . . .79

Glossary . . . . . . . . . . . . . . . . . . . . . . . . . .83

Inde x. . . . . . . . . . . . . . . . . . . . . .89

vi

List of Figures

IntelliTouch Touchscreen . . . . . . . . . . . .1-2

IntelliTouch controller . . . . . . . . . . . . . . 1-3

Bezel design . . . . . . . . . . . . . . . . . . 2-7

Bezel edge . . . . . . . . . . . . . . . . . . 2-8

Typ ical IntelliTouch Touchscreen Installation . 2-10
Proper placement of adhesive tape to the

touchscreen. . . . . . . . . . . . . . . . 2-19

Touchscreen Cabling System for Internal Serial

Controller . . . . . . . . . . . . . . . . 2-22

Internal USB Controller (2500U) . . . . . . . 2-27

Proper and Improper Sealing . . . . . . . . . 2-30

Proper and Improper Bezel Mounting . . . . 2-31

Attaching double-sided adhesive tape to the

touchscreen . . . . . . . . . . . . . . . 2-40

2500S Internal Serial Controller . . . . . . . 2-42

2500U USB controller . . . . . . . . . . . . . 2-43

DC to DC converter . . . . . . . . . . . . . . 2-45

Horizontal escutcheon plate . . . . . . . . . 2-47

Pin positions for the serial port connector . . A-54

Transducer and Wedge Assembly . . . . . . A-56

Pinouts for the IC1 Cable . . . . . . . . . . . A-57

DB9 and DB25 Connector Pin Positions . . . A-60
P2, USB board-mounted header and cable-

mounted plug. . . . . . . . . . . . . . . B-66

Pin diagram for touchscreen connector, P3, as

viewed from connector mating surfaces. B-66
Power connector board-mounted header and cable

mounted-plug. . . . . . . . . . . . . . . B-66

2500U USB Controller, top vie w . . . . . . . B-69

2500U USB Controller, thru-hole locations . . B-69

2500U USB Controller, bottom-view . . . . . B-70

2500U USB Controller, side vie w . . . . . . . B-70

Pin diagram for serial connector, P2, as viewed

from connector mati ng surfaces. . . . . B-72

Pin diagram for touchscreen connector, P3, as

viewed from connector mating surfaces. B-74
Pin diagram for power connecto r, P4, as viewed

from connector mati ng surfaces . . . . . B-74

2500S Serial Controller, top vie w . . . . . . . B-77

2500S Serial Controller, bottom view . . . . . B-77

2500S Serial Controller . . . . . . . . . . . . B-78

2500S Serial Controller, side vie w . . . . . . B-78

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List of Tables

Serial port controller signals . . . . . . . . . A-54

Pinouts for IC1 Cable and header . . . . . . A-57

The IntelliTouch Serial Controller (2500S) bit

position relating to each byte. . . . . . . A-59

USB connector pin numbers and signal

names . . . . . . . . . . . . . . . . . . B-66

IntelliTouch touchscreen conn ector pin numbers

and signal descriptions . . . . . . . . . B-67

Power connector, P4 pins and signal

descriptions . . . . . . . . . . . . . . . B-67

Serial Connector, P2, signal names and

functions . . . . . . . . . . . . . . . . B-73

Serial signal electrical characteristics . . . . B-73

Touchscreen connector, P3, pins and signal

names . . . . . . . . . . . . . . . . . . B-74

Power connector, P4, pins and signal names . B-75
Jumper Loc ati ons and function if insta ll ed . . B-75

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Intr oductio n

The IntelliTouch system has three main components: a clear solid glass screen
formed to match the shape of a display, a sophisticated electr onic controller , and
a software driver. The IntelliTouch touchscreen is based on patented surface
wave technology. Surface waves are mechanical waves that propagate in the
surface of material s such a s glas s. The t ouchscree n may be a flat gl as s panel or a
segment of a sphe re or cy lind ri cal g la ss. Thi s pan el is ins tal le d over t he face of
the display. Because there are no layers or coatings on the glass as with other
technologies, the IntelliTouch touchscreen is extremely durable and allows a
clear, sharp image.

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NTELLITOUCH

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T

ECHNOLOGY

IntelliTouch touc hscreen features include :

• Excellent image clarity with high light transmission

• Extremely fast and sensitive, with the highest resolution of any touchscreen

• Excellent durability, resistant to deep scratches and abrasion

• Activated by a finger, gloved-hand or soft stylus

• Inherently stable, drift-free operation

• Dirt and splash sealing capa bility

• Z-axis response

• Standard sizes for flat, spherical, and cylindrical displays

• Choice of surface treatment (clear, anti-glare or priv acy filter)

• Custom size s avai lab l e for OEM quantities

• 10- year touchscree n w a r rant y

1-1

The IntelliTouch Touch screen

The IntelliTouc h surface wave technology touchscreen consists of a glass panel
molded to the shape of a display's face. Each axis of the touchscreen panel has a
transmitting a nd receiving piezoel ectr ic transducer, and sets of reflector stripes.
See Figure 2.3 on page 10 for details on the construct ion of an IntelliTouch
touchscreen.

Figure 1.1

Surface wave energy is generated by the transmitting transducers mounted in
the corners of the touchscr een. A set of reflector stripes refle cts these waves
across the activ e area of the glas s and to the receiv i ng tran s du cer whi ch
reconverts the surf ace waves into an electrical signal.

When a finger or other energy-absorbing object touches the touchscre en a
portion of the wave is absorbed. The res ulting change in the received signal is
analyzed by the controller and a digitized X and Y coordinate is determined. A
Z-axis level is determined by measuring the amount of signal attenuation at the
touch location. The X, Y, and Z coordinates are determined and the controller
transmits them to the computer.

IntelliTouch Touchscreen

1-2 IntelliTouch/SecureTouch Guide

The IntelliTouch C ontro ller

The IntelliTouch controller provides the drive signal for the touchscreen,
converts the recei ved analog signals into digital touch coordinates, and sends
these coordinates to the computer.

The controller detec ts touc hes by comparing received signals to a reference
waveform acquired when the touchscreen is in an untouched condition. The
IntelliTouch controller detects dirt, dust particles, scratches and other
contaminants on the scre en and “learns around” them. It incorporates those
signals into the reference waveform to ignore the contaminants. If the
contamination is removed, the controller relearns the refere nce signal.

Figure 1.2

Because of the stabili ty of the Int elliTouch system, video realignment is not
necessary unless the position of the video image changes.

Resolution of the Intel liTouch system is defined by the controller and is
typically 4096 x 4096, with the controller transmitting at a rate of 48
coordinates per second during a touch.

The controller performs advanced internal diagnostics as well as touchscreen
diagnostics. The diagnostic results are obtain able through software as well as a
diagnostic LED. USB and serial controllers are available.

IntelliTouch controller

1-3

Driver Software

Elo driver software pro vides a consistent software interface among all Elo
touchscreens and contr ollers.

The driver software scales the absolute coordinates received from the
touchscreen controller into translated screen coordina tes, using the calibration
points obtained with the video alignment program included with the driver
software. The driver also performs other operations as directed by the
application.

Elo provides driver pro grams for the DOS, Windows 3.1, Windows CE,
Windows 95/98, Windows NT, Windows 2000, OS/2, and Macintosh operating
systems. Additional drivers a re also available. Additional operating systems are
supported through outside sources. Refer to the Elo web site,
www.elotouch.com, for details.

If you cannot use an avai la ble driver, Elo can supply all the touchscreen related
information you will need to write your own driver for any type of system,
including UNIX workstations, real-time systems, and embedded systems. For
the 2500S contr oller, the SmartSe t™ Touchscreen Controlle r Family Technical
Reference Manual which is available on the Elo website, provide information
on this process. Machine-independent source code is included on a companion
disk and Web site, www.elotouch.com.

Agency Approvals

Elo IntelliTouch touc hscreens and controllers are “CNR/USR” UL Recogni zed
Components for USA and C anada, Category NWGQ2, I nformation Technol ogy
Equipment Including Business Equipment.

Elo IntelliTouch touc hscreens and controllers are TUV Bauart certified as
components.

Elo IntelliTouch touchscreens and controllers have been tested for compliance
with FCC Part 15 Class B limits.

1. Depending on the application, it may be necessary to pay special attention to system grounding and

shieldin g, an d it may be ne cessary to apply ferrit e suppressor beads.

1-4 IntelliTouch/SecureTouch Guide

1

This chapter outl ines the procedures for installing touchscreen componen ts that
will convert your monitor into a touchmonitor. Details are given on mounting
the touchscreen, controller, and connecting cabl es.

Safe ty Inform ation

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C

OMPONENT INSTALLATION

W ARN ING

The touchscreen installation procedure outlined in this chapter may require exposure to
high-voltage components and handl ing of the CRT. This procedure can be dangerous
and an accident is potentially lethal . Therefore, the procedure should only be perfo rmed
by a qualif ied person. Read this entire chapter before attempting a touchscreen
installation.

Follow the procedure caref ully, work with the pow er off and the unit unplugged, observe
all warnings, and wear protective clothing. Elo is not liable for damage or injury resu lt ing
from the users act ions.

Consider purchasi ng a touch monitor from Elo if you do not have previous
experience working with touc hscreens and disassembling displays. Elo also
offers touchscreen installation services in quantity for a variety of displays or
can recommend third-party intergators in your area.

Work Area

Before proceeding with the installation, prepare a padded work surface. A
plastic waste baske t is recommended for supporting the CRT during part of the
installation.

2-5

Protective Clothing

Wear safety glasses, gloves, a rubber apron, and heavy protective clothing for
any portion of this proced ure that involves handling or working near the CRT.

Getting Started

There are two types of display technologies, CRT displays and LCD displays.
IntelliTouch tou chscre ens are availabl e for most displ ays, howe ver ea ch display
may pose unique installat ion issues. If, afte r reading these instructio ns, you need
further assist ance please contact E lo Ap plicat i on Engi n eerin g for mo re
information.

These instructions assume you have purchased an Elo Touchscreen Kit and
Touchscreen Installation Kit. Only a minimum of equipment and materials is
required beyond what is provide d in the kits. Before proceeding with the
component inte gration design conside rations, please revie w the section on page
6, De sign Considerations for CRTs and LCDs, in order to optimize your
touchmonitor performance.

Design Co nsiderat ions for CR Ts and LCD s

Before designing an LCD or a CRT touchmonitor you should consider the
followin g criter ia (all detai led late r in t he chapter.):

• Ensure the touchscree n active area and overall glass dimensions are
compatible with the displa y viewing area. For CRT displays, additionally
check to make sure the radius of curva ture (ROC) of the display matches the
radius of curvature of the touchscreen.

• Ensure that adequate powe r is avai lable for the controller.

• Ensure the bezel does not contact the transducers located on the edge of the
touchscreen.

• Ensure the bezel lands in the sealing area of the touchscreen. See Figure 2.1
on page 7.

• Ensure there is a suitable location to mount the IntelliTouch controller.

• A seal should be use d between the display bezel and the touchscre en. Ensure
that the display and its mounting can withstand the force from the
compressed seal. See page 30.

• Ensure the CRT tube can be moved back so there is space for the
touchscreen.

2-6 IntelliTouch/SecureTouch Guide

• To prevent touchscreen breakage, there should be a compliant gasket
between the back of the tou c hsc reen an d the fro nt of the display to allow for
variation in the sur face s when asse mbling. A gap is also r equire d betwe en the
touchscreen a nd the face of an LCD display to prevent damage to the displ ay.

• Unlike CRT's, plasma, EL, and backlit LCD displays may be a significant
source of heat. The situation may be more significant if the unit is sealed.
Any installation must avoid heat rise that exceeds the touchscreen
specification.

Bezel Design

The following graphic displays som e bezel ideas in or der to help you mount the
bezel to the touch scree n .

Hard
Lip

Bezel

Figure 2.1

Transducer
Wedge

With thin bezel,
add a 2-3mm
hard lip to
protect
transducer
wedge.

Bezel design

With thick
bezel, mill
out hole for
transducer
wedge.

Before

Compression

Even on a beveled touchscreen,
the transducer sticks up 1mm
above the glass. Add a spacer
to ensure clearan ce . Seal
thickness will not suffice.

After

Compression

Another idea:
Add a hard lip
behind the seal
to control
compression.

2-7

Bevel edge for nice appearance

Round corners for nice appearance and easy cleaning

On bezel and cabinet, choose paint finish and/or
surface texture so fingerprints do not show

Figure 2.2

It may be necessary to cut r ibs and struts inside the bez el. Cutting these ribs and
struts does not usually caus e difficulties, although the stif fness of the bezel may
be reduced slightly . Try not to c ut into the posts for the CRT attachment sc rews.
Bezel and tube combinations tha t require this cut are rare.

Generally, a total cleara nce between the edge of the touchscre en and any ribs or
struts of at least 0.25-inch (6 mm) in both axes is necessary. This prevents the
interferen ce fit problem and allows for variation in touchscreen mounting
position.

CR T Integr ation

Safety Infor mati on

Before proceeding with the installation, prepare a padded work surface. A
plastic waste baske t is recommended for supporting the CRT during part of the
installat ion. Wear safety glasses, gloves, a rubber apron, and heavy protective
clothing for any portion of this procedure that involves handling or working
near the CRT.

Note:

This document describes the basic tasks common to the majority of CRT monitor
integrations. These in structions assume an audience of trained integration personn el.

Bezel ed g e

2-8 IntelliTouch/SecureTouch Guide

Definiti on o f Terms:

MONITOR: The term "monitor" refers only to t he monitor, tele vision, or other
display that is to be integra ted.

BEZEL: The term “bezel” refers to a specific part of the molded plastic cabinet
of the monitor. The bezel is the part that covers the front of the CRT and
separates it from the rear case.

CASE: The term "case" refers to a specific part of the molded plastic cabinet of
the monitor. Th e cas e is the part tha t sep ara te s from the fron t bezel . Th e cas e
normally covers the top, sides, back and bottom of the monitor assembly.

LCD: Liquid Crystal Display. Also referred to as the Panel.
CONTROLLER: The electronic device that converts touch data into USB

information. For purposes of this document the controller referred to is the
2500U, which is the Elo internal IntelliTouch USB controller 2500U. Part
number 714259-000.

Suggested Tools

Along with a copy of the monitor manufactur er’s manual, the following list of
tools may be needed to install the touchscreen. Some of the tools are optional,
but useful.

• Long (at least 9 inches, 230 mm) flat blade screwdriver with insula ted handle

• Clip lead or heavy-gauge wire

• #2 Phillips screwdriver

• Scissors

• X-Acto knife (No. 11 blade) or hand milling tool

• DB9 hole punch (not needed for 2500U)

•Cable ties

• Household glass cleane r

• Paper towels

• Small containers or plastic bags to hold loose parts

The Elo Touchscreen Insta lla tion Kit is also recommended, and includes
commonly used materials neede d for touc hscreen installation. This kit is useful
for identifyi ng preferred materials for your own procurement and may also be
cost-effective and convenient when purchased for a limited number of
installations. (See “Elo Part Numbers” on page 79.)

2-9

Summ ar y of In st all ati on Ste p s

The CRT installation process consists of the following steps:

1 Incoming inspection
2 Disassembling the monitor
3 Attaching the touchscreen to the CRT
4 Installing the controller
5 Routing the touchscreen cables
6 Reassembling the monitor
7 Sealing the monitor

Specific compati bility may not be confirmed until well into the installation.
IntelliTouch touc hscreens can be installed on most types of CRT displays.
Figure 2.3 shows a typical installation.

1

Figure 2.3

Typical Int elliTouch Touchscr een Installation

Most displays require complete disassembly, including remova l of the CRT, to
install a touchscr een. Dis ass embling the displa y ca n be a da nger ous proce dure if
done improperly. Any damage to the displa y or the touchscreen as a result of
improper installation is the installer’s responsibility. Without prior approval of
the display manufacturer, you will probably void the display’s warranty by
disassembling it. Also, it will be necessary to recertify the display and
touchscreen syst em for regul ato ry agen cies suc h as FC C, CE and U L /CSA if
those certific ations were originally present and need to be maintained for your
intended application.

1. To complete the first integration may take several hours.

2-10 IntelliTouch/SecureTouch Guide

Incoming Inspection

Unpacking the Touchscreen

Handle the touchscreen with care. Note the transducers in the corners are
especially fragile. Note the location of the transducers and wiring. If any of
these are accidentally broken during handling or installa tion, or if a wire is
pulled loose, the touchscreen will not operate. Avoid excessive handling and
stress on the touchs creen cable . Wear gloves to avo id getting finge rpr ints on the
touchscreen . The touc hscreens are pre-cl ean e d by Elo .

Testing the Monitor

The CRT display must be in good working order before beginning the
installation of the touchscreen. Inspect the monitor for cosmetic flaws or
damage. With a new display, it is suggested that you t est the display by running
it overnight. Check for acce ptable color, linearity, br ightness, contrast,
distortion, and other QC tests.

Disassembling the Monitor

Disassemble the monito r on a large, well -lit work surface. Leave space to set
aside major display compon ents. Group screws and other hardware in small
containers or in specif ic areas on the work surface as you remove them, in
relation to the part of the display where you are working.

Most display manufactur ers connect the major components with detachable
cables that have label ed and keyed con nectors; these cables are of lengths that
will usually connect to only one place. Also, screws are identifiable by type and
size, and usually will not f it in the wrong pla ce. The most dif ficult pr obl em with
missing or wrong hardware or connec tions will be with ground cables that
attach to obscure ground points on the metal chassis. When in doubt, make
notes of the connection points.

2-11

W ARN ING

Remove the Back Case

Figure 2.3 on page 10 shows the typical construction of a 15-inch display.
Disassembly usually starts with removal of the back case. For assistance with
disassembly, consult your particular manufacturer's service manual. Carefully
lay the monitor on its face on the padded work surface and remove the screws
that attach the back case t o the be zel or frame.

While remov ing the bac k case, n ote the cle ara nce be t ween the insid e rea r
surface of the c ase a nd a small circuit board plugge d into a socket on the end of
the CRT. If there is not enough clearance to move the CRT and this circuit
board about.25 inch (6 mm) toward the rear of the case, you may be unable to
successfully install a touchscreen on the display and completely reinstall the
back case. Contact Elo Application Engineering, (1-800-557-1458 x6) for
possible alter natives.

After the back case is removed, the CRT is substantially exposed. Use extreme
care when working around the CRT.

Impact or forc e against the neck of the CRT, or the pins at the end where the small cir cuit
board is attached, could crack the tube, resulting in loss of vacuum or implosion of the
tube. Either result destroys the CRT. Implosion (collapse of the glass inward, caused by
the high va cuum in side th e tube), foll owed b y th e rebound of many gl ass pi eces ou tward ,
is potential ly l ethal to anyone in the i mmedi ate area . Handl e the CR T ca reful ly, keep tools
away from the CRT, and wear protective clothing including eye protection and gloves.

Discharge the CRT

W ARN ING

Dangerous voltages may be pr esent on the CRT anode. The anode m ay retain a very
dangerous v ol tage e v en af ter t he disp la y has been o ff f or da ys . Whil e most CRT m onit ors
now incorporat e bleeder circuits t o discharge the CRT, one must not assume that the
CRT is properly dischar ged. Accidental contact with the anode lead or anode button (the
small hole in the CRT glass where the anode lead i s att ached) prior to discharge may
result in a potentially lethal shock. Follow the procedure below carefully.

The anode le ad of the di splay fe eds hi gh vol tage from the f lyback t ransfor mer to
the anode button on the CRT. The anode lead is usually red in color, and the
actual connecti on to the anode button is usually covered by a large rubber
suction cup-li ke boot. In most displ ays, th e button i s locate d on the ta pered face,
or bell, of the CRT glass near the top of the display. See Figure 2.3 on page 10.

2-12 IntelliTouch/SecureTouch Guide

W ARN ING

It may be necessary to remove some sheet metal to gain access to the anode
lead—be very careful to do this without making contact to the anode lead itself.

Carefully discharge the CRT using the following procedure:

1 Connect a clip lead or a heavy-gauge wire to the mounting ears or the spring-

tensioned ground str ap.

2 Connect the other end of the clip lead or wire to the stem of a flat blade

screwdriver that ha s an insulated handle.

3 Hold the screwdriver by the insulated handle only. Insert the blade of the

screwdriver under the rubber boot and make contact with the anode lead at
the button. A distinct “snap” may or may not be heard as it discharges,
depending on the amount of charge pres ent on the anode.

4 Disconnect the anode lead from the button by unhooking the spring wire

clips. Note the location of the anode for proper CRT orientation during
reassembly.

The CRT will re gain a charge over ti m e, even after it has been discharged. To avoid a
dangerous elect ric shock, always discharge the CR T just before handling it , and treat it
with respect thereafter.

Remove the Electronic Chassis

Continue disassembling the display until the face of the CRT is completely
exposed. The degree of disassembly required will vary from display to display.

Normally the next step will be to remove the electronics chassis from the
display. This requires removal of a small circuit board that is usually plugged
into the socket on the end of the CRT. The circuit board is often glued to the
CRT socket with a soft adhesive which must be cut away to remove the board.
Several cables must als o be unplugged from the electronics. Typically the se
cables are:

• Four wires from the yoke of the CRT, typically in a single four-pin
connector. The yoke is the copper wire and magnet assembly at the base of
the neck of the CRT. MPR II-compliant monit ors may have addit ional cables
and connectors on the yoke.

• A two-wire cable from the degaussing coil. This coil may be attached to the
CRT, or be laying out of sight between the CRT and the bezel. Some
monitors may have two separate coi ls.

• A one- or two-wire ground cable connected between the CRT circuit board
and a ground strap. This strap is a long, uninsulated, braided wire which is
spring-tensioned to maintain contact with the bell of the CRT.

• Various cables connected to the power switch, pilot light, front panel
controls, etc.

2-13

• Various cables connected to the power switch, pilot light, front panel
controls, etc.

Other cables may have to be unplugged from the electronic chassis. The need
for this may not be apparent until the chassis is removed, as instructed below.

Another prelimina ry step in determining touchscreen/display compatibility
should be pe rformed at this point. Before r emoving the electronics chassis, note
the clearance betwe en the chassis components and the bell of the CRT. Since
the standard technique for mounting the touchscreen involves moving the CRT
back in the display chassi s, the re must be enough clearance between
components on the chassis and the CRT after allowing for about 0.25-inch
(6 mm) movement of the CRT towards the rear of the chassis. Fail ure to allow
for this clearanc e requi rement may result in mechanical damage later
(especially in shipping). It may also cause electrical damage from shorts
between “live” components on the chassis, such as heat sinks or uninsulated
component leads, and the bell of the CRT which is usually painted with a
conductive coating tha t is grounded to the chassis through the braided wire
ground strap. Repositioning or substituting low profile components may be an
option. Contact Elo Technical Support, (1-800-557-1458 x6), for assistance.

After disconnect ing any necessary cables remove the screws that atta ch the
electronics ch assis to the bezel. Note the bezel is essentially where all parts of
the mechanical assembl y are atta ched, unless you have a rare unit that has an
internal frame . A s you pu ll the chas s is awa y from the b eze l, mak e sure tha t
cables and circuit boa rds do not hit the neck of the CRT and that nothing
becomes caught on the adjustment r ings or other components on the neck of the
CRT. Also watch for other cables that need to be disconnected. After removal,
set the electron ics ch assis aside .

2-14 IntelliTouch/SecureTouch Guide

Remove the CRT

Removal of the CRT is next. Prepare a soft surface to set the CRT on. Remove
the screws attachi ng the CRT to the bez el, and the n remove the CRT. Do not lift
or carry the CRT by the neck or yoke assembly. Avoid contact with the anode
button, which may still have some residual charge on it, (you may wish to
discharge it again at this point). Set the CRT on the prepared surface.

Several other preliminary compatibility requirements should now be assessed:

• Position the CRT so the face is accessible, providing a soft cushion for the
neck and the yoke if they must rest on the work surfa ce. Alte rnative ly, set th e
CRT face-up in an office-type plastic was te basket, making su re that the tube
is not resting on the neck (The small thin part of the CRT is the neck). Place
the touchscree n on the face of the tube, an d ch eck to s ee tha t the face o f the
CRT and touchs creen are about the s ame size, and tha t the radi us of cur vatur e
(ROC) of each surface matches well. I f both of these conditions are not met,
you may not have the prope r touchscreen f or the displa y. Most color displays
have standard size CRT's with standard ROC's, and Elo has touchscreens for
most of them.

• Next, determine if the touchscreen will fit in the bezel without modificati ons
to the bezel. Modifications, if necessary, should be done without
compromising the mechanical integrity of the display.

• Lay the touchscreen face-down in the bezel, being careful not to damage the
transducers. Leave the degaussing coil in place, if present. The degaussing
coil is a hoop, often located between the CRT and bezel, approximately

0.25-inch (6 mm) thick, with a two-wire cable and connector. The coil was
probably unplugged from the power supply earlier.

If the touchscree n will not fit flush again st the lip of the bezel, do not force it .
An interference fit be tween the edge of an IntelliTouch touc hscreen and some
of the plastic ribs f ound in displa y bezels c an pinch and break the small wires
which carry the signals al ong the edges of the touchscreen or even result in
fracture of the glass after reassembly.

It may be necessary to cut these ribs and struts inside the bezel. Cutting these
ribs and struts does not usually cause difficult ies although the st iffness of the
bezel may be reduced slightly. Try not to cut into the posts for the CRT
attachment screws. Bezel and tube combinations that require this cut are rare.

Generally, a total cleara nce between the e dge of the touchscr een and any ribs
or struts of at least 0.25-inch (6 mm) in both axe s is necessary. This prevents
the interferenc e fit problem discussed above and allows for variat ion in
touchscreen mounting position.

2-15

The potential inte rference between the degaussing coil and the touchsc reen
must also be evalua ted. The coil will usually fit between t he touchscreen and
the inside surface of the bezel, as there is typically a natural cavity for it. If
there is not enough space for the coil, you may have to provide additional
setback for the CRT. It may also be possible to reloc ate the coil to the bell
side of the CRT. Normally, this does not significantly reduce the coil’s
effectiveness. However, you must determine this by inspecting the display
for color proble ms aft er reas s embl y .

• Check for adequate clearance of the transducers and the cable from the bezel
structure. If the position of the cable causes difficulty, the touchscreen may
be rotated 180° (only if the touchscreen is sealed and using Elo drivers).The
preferred or ientation of the IntelliTouch touchscreen is with the cable exiting
from the right side, when viewed from the fr ont of the display. Rotation will
cause an inversion of the outp ut coordinates, which will be compensated for
automatically by Elo dri ver software, but perhaps not by other driver s. ( Flat
touchscreens should ha ve the reflector stripes on the side facing the user.)

V erify Touchscreen Fit

1 Check to ensure touchscreen dimensions match CRT display. Pla ce the

touchscreen on the face of the tube to see that the face of the CRT and
touchscreen are about the same size , a nd that the radius of curvature (ROC)
of each surface matches well. I f both of these conditions are not met, you
may not have the proper touchscreen for the display. Most color displays
have standard size CRT's with standard ROC's, and Elo has touchscreens for
most of them.

2 Determine if the touchscreen will fit in the bezel wit hout modific ations to th e

bezel. The bezel should not touch the transducers and should land in the
sealing area, not on the reflector strips.

2

Modifications, if necessary, should
be done without compromising the mechanical integrity of the display. Also
see Bezel Design section for r ecommen dations.

Note:

2. Clearance around the transducers should be 1-2 mm clearance above transducers (to prevent
dampening vibrat ion, electrical short or breakage), and 3-5 mm around transdu cers. Allow for
manufacturing variances of touch screen and integration. If the position of the cable causes difficulty,
the touchscreen may be rotated 180°. The preferred orientation of the IntelliTouch touchscreen is with
the cable exiting from the ri ght side, when view ed from the front of the display. Rotation will caus e an
inversion of the output coordinat es, which will be compensated for autom atically by Elo driver
software, but perhaps not by other drivers. (Flat touchscreens shoul d have the reflector stripes on the
side facing the use r.)

2-16 IntelliTouch/SecureTouch Guide

If the touchscreen will not fit flush agai nst the lip of the bezel, do not force it. An
interference fit between the edge of an IntelliTouch touchscreen and some of the plastic
ribs found in displ ay bezels can pi nch and break the small wires which carry the signals
along the edges of t he touchscreen or even result in fracture of the glass after
reassembly.

3 It may be necessary to cut ribs and struts inside the bezel. Cutting these ribs

and struts does not usuall y cause difficulties, althoug h the stiffness of the
bezel may be reduced slightly. Try not to cut into the posts for the CRT
attachment screws. Bezel and tube combinations that require this cut are rare.

Generally, a total cleara nce between the e dge of the touchscr een and any ribs
or struts of at least 0.25-inch (6 mm) in both axe s is necessary. This prevents
the interference fit problem discussed above, and allows for variation in
touchscreen mounting position.

4 The potential interference between the degaussing coil and the touchscreen

must also be evalua ted. The coil will usually fit between t he touchscreen and
the inside surface of the bezel, as there is typically a natural cavity for it. If
there is not enough space for the coil, you may have to provide additional
setback for the CRT. It may also be possible to reloc ate the coil to the bell
side of the CRT. Normally, this does not significantly reduce the coil’s
effectiveness. However, you must determine this by inspecting the display
for color proble ms aft er reas s embl y .

5 Check for adequate clearance of the transducers and the cable from the bezel

structure. If the position of the cable causes difficulty, the touchscreen may
be rotated 180° (only if the touchscreen is sealed and using Elo drivers).

6 The preferred orientation of the IntelliTouch touchscreen is with the cable

exiting from the right side, when viewed from the front of the monitor.
Rotation will cause an inver sion of the output coordinates, which will be
compensated for automatically by Elo driver software, but perhaps not by
other drivers. (Flat touchscreens should have the reflector strips on the side
facing the user.)

2-17

Attaching the T ouchscreen

Once you have verified all dimensions and checked that the bezel has plenty of
clearance around the transducers and lands inside the sealing area, you are ready
to install the touchsc reen.

1 Check room for cable routing:

• Route away from noise sourc es (flyback transfor mer, power supply, yoke ,

high voltage lead, etc.)

• Cable can be on either side.

• Avoid pinch points.

• Make up excess cable with tie wraps.

2 Ensure the display and touchscreen and are clean before inst allation.

• Use black background to ensure fingerprints and smudges are not visible.

• Compressed air is best to remove dust.

3 Use double-sided high tack adhesive tape

touchscreen to the display.

• 3 mm thi ck fo r cu rved

• 2 mm thick for flats > 15"

• 1 mm thi ck fo r fla ts <= 1 5"

3

on all four sides to attach the

• Acts as dust seal as well as an adhesive. (Make a flat “T” in corners for

dust seal.)

• Or substitute foam tape on two sides

• Or use metal frame on flats, but still use foam tape for dust seal.

3.Refer to “Elo Part Numbers” on pag e C-79 to ensure you are using the prop er
adhesive

2-18 IntelliTouch/SecureTouch Guide