Elo TouchSystems IntelliTouch Ultra Product Manual Download

Page: 57 / 105

Chapter 4 - Component Installation

••

the video input cable

••

the horizontal and vertical oscillator/drive sections

••

the degaussing coil wiring

Obviously, it may not be possible to avoid all these areas simultaneously. Watch

carefully for false touch reports generated by the controller, or other intermittent

operation, especially when very high resolution video images are being displayed.

operation, especially when very high resolution video images are being displayed.
Higher resolution video has a greater bandwidth, and can increase the possibility

Higher resolution video has a greater bandwidth, and can increase the possibility
of interference with the touchscreen system. See

of interference with the touchscreen system. See

Hardwar

Hardware Troubles

e Troubleshooting

hooting

page 53. Once acceptable cable positioning is determined, tie the cable down to

page 53. Once acceptable cable positioning is determined, tie the cable down to
avoid movement during shipment.

avoid movement during shipment.

In addition to careful cable routing, other EMI suppression techniques may be

In addition to careful cable routing, other EMI suppression techniques may be
necessary to satisfy agency approval requirements. Use ferrite beads or other radio

necessary to satisfy agency approval requirements. Use ferrite beads or other radio
frequency (RF) suppression elements, additional shielding, and different

frequency (RF) suppression elements, additional shielding, and different
grounding techniques as needed.

grounding techniques as needed.

EASSEMBLING THE

ISPLAY

With the touchscreen mounted, and the cable routing and exterior interface

With the touchscreen mounted, and the cable routing and exterior interface
determined, the display must be reassembled. Reassembly is generally in reverse

determined, the display must be reassembled. Reassembly is generally in reverse
order of disassembly. Beware of potential clearance problems between the bell of

order of disassembly. Beware of potential clearance problems between the bell of
the CRT and the electronics chassis, as shorts in this area can produce catastrophic

the CRT and the electronics chassis, as shorts in this area can produce catastrophic
failures of the display. Also, if the inside surface of the back case is painted with a

failures of the display. Also, if the inside surface of the back case is painted with a
conductive coating, watch for shorts between the CRT circuit board and the rear

conductive coating, watch for shorts between the CRT circuit board and the rear
of the back case, as these can also produce disastrous results.

of the back case, as these can also produce disastrous results.

When the electronics chassis is reinstalled, the CRT circuit board is usually

When the electronics chassis is reinstalled, the CRT circuit board is usually
carried along with it. It is often advisable to have a second person assist you, to

carried along with it. It is often advisable to have a second person assist you, to

insure that this circuit board and various other cables do not interfere with the

yoke or neck of the CRT.

Safety glasses, gloves, heavy protective clothing, and

caution are strongly advised for all participants.

Reconnect all cables that were removed during the disassembly procedure. Watch

Reconnect all cables that were removed during the disassembly procedure. Watch
for single ground connections from the CRT mount to the chassis, between

for single ground connections from the CRT mount to the chassis, between
individual chassis members, etc., which may have lugs and screws to connect

individual chassis members, etc., which may have lugs and screws to connect
them, or sometimes individual push-on solderless connectors.

them, or sometimes individual push-on solderless connectors.

Failure to

reconnect these important cables may result in improper performance of the

reconnect these important cables may result in improper performance of the
display after reassembly and may render the unit unsafe.

display after reassembly and may render the unit unsafe.