Spacing The Crt From The Bezel - Elo TouchSystems IntelliTouch Ultra Product Manual

Spacing the CRT from the Bezel

Spacing the CRT from the Bezel
Inspect your results carefully for alignment, trapped dust or lint, and a good Inspect your results carefully for alignment, trapped dust or lint, and a good
• •
seal between the touchscreen and CRT. If there is trapped lint, you may be seal between the touchscreen and CRT. If there is trapped lint, you may be
able to remove it without removing the touchscreen by capturing it with a thin able to remove it without removing the touchscreen by capturing it with a thin
wire with a small spot of glue. Poke the wire through the foam gasket and wire with a small spot of glue. Poke the wire through the foam gasket and
stick the lint to the wire. Pull the lint back into the gasket and embed it there, stick the lint to the wire. Pull the lint back into the gasket and embed it there,
or remove it completely and reseal the gasket. or remove it completely and reseal the gasket.
• • If you must remove the touchscreen from the CRT, cut the adhesive tape away If you must remove the touchscreen from the CRT, cut the adhesive tape away
with a sharp thin blade, such as an X-Acto knife. The touchscreen glass will with a sharp thin blade, such as an X-Acto knife. The touchscreen glass will
probably break if you try to pull it off by a corner or an edge. Shave the old probably break if you try to pull it off by a corner or an edge. Shave the old
adhesive tape from the touchscreen and CRT with the knife. Adhesive adhesive tape from the touchscreen and CRT with the knife. Adhesive
residues can be removed with isopropyl alcohol, which will leave streaks and residues can be removed with isopropyl alcohol, which will leave streaks and
fingerprint smears. Use glass cleaner for the final cleaning prior to fingerprint smears. Use glass cleaner for the final cleaning prior to
reapplication of new tape. reapplication of new tape.
The last part of the touchscreen mounting procedure is to determine the appro- The last part of the touchscreen mounting procedure is to determine the appro-
priate spacing of the CRT from the bezel, (with the touchscreen attached), and to priate spacing of the CRT from the bezel, (with the touchscreen attached), and to
reinstall the CRT with the required spacers in place (refer to Figure 4-1, page 27). reinstall the CRT with the required spacers in place (refer to Figure 4-1, page 27).
Do not cla Do not clamp the touc mp the touchscreen b hscreen between the
spacers as breakage will almost certainly occur. spacers as breakage will almost certainly occur.
touchscreen and the two layers of adhesive tape is 3/16-inch (5 mm). If the touchscreen and the two layers of adhesive tape is 3/16-inch (5 mm). If the
touchscreen is to be in contact with the bezel, 3/16-inch (5 mm) nominal spacers touchscreen is to be in contact with the bezel, 3/16-inch (5 mm) nominal spacers
would be required. would be required.
Because the original CRT face-to-bezel mount is often an interference fit, with the Because the original CRT face-to-bezel mount is often an interference fit, with the
bezel shape altered slightly to draw it up tightly against the CRT, you should start bezel shape altered slightly to draw it up tightly against the CRT, you should start
with a 1/16-inch (2 mm) thicker spacer than the nominal dimension above. Two with a 1/16-inch (2 mm) thicker spacer than the nominal dimension above. Two
thicknesses of spacers, plus additional washers to use as shims, are available in thicknesses of spacers, plus additional washers to use as shims, are available in
the Touchscreen Installation Kit (P/N UK0001). the Touchscreen Installation Kit (P/N UK0001).
During the spacer selection process, you may have to install the CRT with the During the spacer selection process, you may have to install the CRT with the
touchscreen attached in the bezel several times. To prevent the CRT from touchscreen attached in the bezel several times. To prevent the CRT from
dislodging the spacers, temporarily insert plastic tie wraps or toothpicks as guides dislodging the spacers, temporarily insert plastic tie wraps or toothpicks as guides
in the mounting post holes. After selecting the correct spacers, discard the guides in the mounting post holes. After selecting the correct spacers, discard the guides
and fix the spacers more securely in place with the adhesive "doughnuts" provided and fix the spacers more securely in place with the adhesive "doughnuts" provided
in the Touchscreen Installation Kit. in the Touchscreen Installation Kit.
When spacers for the desired gap have been selected, install the CRT. Make sure When spacers for the desired gap have been selected, install the CRT. Make sure
you have previously reinstalled the degaussing coil. Select a screw that is long you have previously reinstalled the degaussing coil. Select a screw that is long
enough to compensate for the spacer thickness (provides at least three full turns enough to compensate for the spacer thickness (provides at least three full turns
into the mounting post threads) but not so long as to penetrate the surface of the into the mounting post threads) but not so long as to penetrate the surface of the
bezel. Over-tightening the screws may strip or split the mounting posts. bezel. Over-tightening the screws may strip or split the mounting posts.
Mounting the Touch Mounting
etween the bezel and t bezel and the CRT wit he CRT without prope
The nominal thickness of the The nominal thickness of the
37 37
the Touchscreen screen
hout proper r