Elo TouchSystems IntelliTouch SecureTouch manual Removing the Rear Case, Removing the LCD

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Removing the Rear Case

Disassembly usually starts with removal of the back case. For assistance with disassembly, consult your manufacturer's service manual.

To remove the rear case:

•Carefully lay the display on its face on the padded work surface and remove the screws that attach the rear case to the bezel or frame.

•Slowly pull the rear case upward.

•Disconnect any cabling that may be attached to the rear case

•While removing the rear case, note the clearance between the inside rear surface of the case and any of the monitor’s circuitry. If there is not enough clearance to move this circuitry 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 Applications Engineering (1-800-557-1458 x6) for possible alternatives.

Removing the LCD

1Continue disassembling the display until the face of the LCD is completely exposed. The degree of disassembly required will vary from display to display.

2The next step will be to remove the LCD from the display’s housing. Several cables may have to be unplugged from the LCD before it can be removed. Typically these cables are:

•The input video connector. A multi-conductor cable that is attached to the rear of the LCD panel.

•The back-lamp cables. One or two cables connected to the rear of the panel. These cables originate from the high voltage inverter.

•Various cables connected to the power switch, pilot light, front panel controls, etc. Other cables may have to be unplugged from the electronics chassis. The need for this may not be apparent until the chassis is removed, as instructed below. As you pull the LCD out of the frame, make sure to watch for other cables that need to be disconnected. After removal, set the LCD face up on a padded, static free work surface.

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Contents Page Elo IntelliTouch /SecureTouch Touchscreen Guide Disclaimer Page Intellitouch 10-YEAR Warranty Page Table of Contents Index List of Figures Viii List of Tables Page Introduction Intellitouch TechnologyIntelliTouch Touchscreen IntelliTouch TouchscreenIntelliTouch controller IntelliTouch ControllerAgency Approvals Driver SoftwareWork Area Safety InformationDesign Considerations for CRTs and LCDs Getting StartedProtective Clothing Bezel design Bezel DesignCRT Integration Safety InformationSuggested Tools Definition of TermsTypical IntelliTouch Touchscreen Installation Summary of Installation StepsIncoming Inspection Testing the MonitorDisassembling the Monitor Unpacking the TouchscreenDischarge the CRT Remove the Back CaseRemove the Electronic Chassis 14I n t e l l i T o u c h / S e c u r e T o u c h G u i d e Remove the CRT Verify Touchscreen Fit Page Attaching the Touchscreen Proper placement of adhesive tape to the touchscreen Spacing the CRT from the Bezel Installing the Controller Touchscreen Cabling System for Internal Serial Controller Internal Serial Controller 2500SP4 Pins Signal Function 24I n t e l l i T o u c h / S e c u r e T o u c h G u i d e External Serial Controller 26I n t e l l i T o u c h / S e c u r e T o u c h G u i d e Internal USB Controller 2500U Internal USB Controller 2500U28I n t e l l i T o u c h / S e c u r e T o u c h G u i d e Reassembling the Monitor Routing the Touchscreen CablesProper Sealing Improper Sealing Sealing the MonitorSystem Evaluation Sealing Material SelectionProper Bezel Mounting Improper Bezel Mounting LCD Integration Unpacking the Touchscreen Definition of Terms Disassembling the LCD MonitorRequired Parts for Serial Connection Tools and EquipmentRequired Parts for USB Connection Optional Parts for USB Connection Optional Parts for Serial ConnectionRemoving the LCD Removing the Rear CaseDetermining Touchscreen Fit Mounting the Touchscreen Attaching double-sided adhesive tape to the touchscreen Spacing the LCD from the Bezel Sealing10 2500S Internal Serial Controller 11 2500U USB controller Parasitic Tap of 5Vdc Power12 DC to DC converter Parasitic Tap of 7-30Vdc DC to DC converterModifying the Case for USB Output Modifying the Case for Serial Output13 Horizontal escutcheon plate Re-assembling the Display48I n t e l l i T o u c h / S e c u r e T o u c h G u i d e Troubleshooting Process Troubleshooting GuideSoftware Troubleshooting Display ProblemsVideo Alignment Problems Hardware TroubleshootingSerial Controller Using the Comdump UtilityByte Byte DescriptionHost Signal Source P2 Pins DB25RS-232 Connections Power Connections Touchscreen and Touchscreen Cables Figure A.2 Transducer and Wedge AssemblyEC2 Cable IC1 Cable2x6 Male Header DB9 Male Function IntelliTouch Serial Controllers Diagnostic LEDsIntelliTouch Serial Controller 2500S Diagnostic CodesAA Bit Value hex Description Figure A.4 DB9 and DB25 Connector Pin Positions DB9 and DB25 Connector Pin PositionsSpecifications Mechanical IntelliTouch TouchscreensOptical EnvironmentalUL Compliance Fire Retardation FCC Compliance Agency ApprovalsIntelliTouch 2500U USB Controller Physical CharacteristicsElectrical Touchscreen Connector Power Connector, P4 P2 pin number Signal name Standard wire color Signal name P4 pin Signal function Signal name P3 pin Signal functionAgency Approvals LED Diagnostic CharacteristicsLED Blink Rate Function LED State FunctionFigure B.4 2500U USB Controller, top view 2500U USB Controller DrawingsFigure B.6 2500U USB Controller, bottom-view Environments IntelliTouch 2500S Serial Controller72I n t e l l i T o u c h / S e c u r e T o u c h G u i d e Parameter Value Applicable Signals EIA-232 subsec Signal Name DB-9 P2 pin Sourced by Signal FunctionBoard mounted Cable applied Header Plug Jumper Function Jumper Settings76I n t e l l i T o u c h / S e c u r e T o u c h G u i d e Figure B.11 2500S Serial Controller, top view DrawingsFigure B.13 2500S Serial Controller Part Number Description ELO Part NumbersCables Stylus 82I n t e l l i T o u c h / S e c u r e T o u c h G u i d e Glossary Page Glossary-85 Page Glossary-87 Vertical Refresh Rate-See Refresh Rate Index Page Page