Elo TouchSystems IntelliTouch SecureTouch manual Remove the Back Case, Discharge the CRT

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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 to the bezel or frame.

While removing the back case, note the clearance between the inside rear surface of the case and a small circuit board plugged 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 alternatives.

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

WARNING Impact or force against the neck of the CRT, or the pins at the end where the small circuit 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 vacuum inside the tube), followed by the rebound of many glass pieces outward, is potentially lethal to anyone in the immediate area. Handle the CRT carefully, keep tools away from the CRT, and wear protective clothing including eye protection and gloves.

Discharge the CRT

WARNING Dangerous voltages may be present on the CRT anode. The anode may retain a very dangerous voltage even after the display has been off for days. While most CRT monitors now incorporate bleeder circuits to discharge the CRT, one must not assume that the CRT is properly discharged. Accidental contact with the anode lead or anode button (the small hole in the CRT glass where the anode lead is attached) prior to discharge may result in a potentially lethal shock. Follow the procedure below carefully.

The anode lead of the display feeds high voltage from the flyback transformer to the anode button on the CRT. The anode lead is usually red in color, and the actual connection to the anode button is usually covered by a large rubber suction cup-like boot. In most displays, the button is located on the tapered face, or bell, of the CRT glass near the top of the display. See Figure 2.3 on page 10.

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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 Intellitouch Technology IntroductionIntelliTouch Touchscreen IntelliTouch TouchscreenIntelliTouch Controller IntelliTouch controllerDriver Software Agency ApprovalsSafety Information Work AreaGetting Started Design Considerations for CRTs and LCDsProtective Clothing Bezel Design Bezel designSafety Information CRT IntegrationDefinition of Terms Suggested ToolsSummary of Installation Steps Typical IntelliTouch Touchscreen InstallationTesting the Monitor Incoming InspectionDisassembling the Monitor Unpacking the TouchscreenRemove the Back Case Discharge the CRTRemove 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 Internal Serial Controller 2500S Touchscreen Cabling System for Internal Serial ControllerP4 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 Routing the Touchscreen Cables Reassembling the MonitorSealing the Monitor Proper Sealing Improper SealingSealing Material Selection System EvaluationProper Bezel Mounting Improper Bezel Mounting LCD Integration Unpacking the Touchscreen Disassembling the LCD Monitor Definition of TermsTools and Equipment Required Parts for Serial ConnectionRequired Parts for USB Connection Optional Parts for Serial Connection Optional Parts for USB ConnectionRemoving the Rear Case Removing the LCDDetermining Touchscreen Fit Mounting the Touchscreen Attaching double-sided adhesive tape to the touchscreen Sealing Spacing the LCD from the Bezel10 2500S Internal Serial Controller 11 2500U USB controller Power Parasitic Tap of 5VdcParasitic Tap of 7-30Vdc DC to DC converter 12 DC to DC converterModifying the Case for Serial Output Modifying the Case for USB OutputRe-assembling the Display 13 Horizontal escutcheon plate48I 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 Guide Troubleshooting ProcessDisplay Problems Software TroubleshootingHardware Troubleshooting Video Alignment ProblemsUsing the Comdump Utility Serial ControllerByte Description ByteP2 Pins DB25 Host Signal SourceRS-232 Connections Power Connections Figure A.2 Transducer and Wedge Assembly Touchscreen and Touchscreen CablesIC1 Cable EC2 Cable2x6 Male Header DB9 Male Function Diagnostic LEDs IntelliTouch Serial ControllersDiagnostic Codes IntelliTouch Serial Controller 2500SAA Bit Value hex Description DB9 and DB25 Connector Pin Positions Figure A.4 DB9 and DB25 Connector Pin PositionsSpecifications IntelliTouch Touchscreens MechanicalOptical EnvironmentalAgency Approvals UL Compliance Fire Retardation FCC CompliancePhysical Characteristics IntelliTouch 2500U USB ControllerElectrical Touchscreen Connector Power Connector, P4 P2 pin number Signal name Standard wire color Signal name P3 pin Signal function Signal name P4 pin Signal functionLED Diagnostic Characteristics Agency ApprovalsLED Blink Rate Function LED State Function2500U USB Controller Drawings Figure B.4 2500U USB Controller, top viewFigure B.6 2500U USB Controller, bottom-view IntelliTouch 2500S Serial Controller Environments72I 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 Signal Name DB-9 P2 pin Sourced by Signal Function Parameter Value Applicable Signals EIA-232 subsecBoard mounted Cable applied Header Plug Jumper Settings Jumper Function76I 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 Drawings Figure B.11 2500S Serial Controller, top viewFigure B.13 2500S Serial Controller ELO Part Numbers Part Number DescriptionCables 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
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