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9. Adjust vertical size so that the top and bottom of
the displayed grid coincide with the plastic grid.
10. Repeat 8 and 9 as necessary to get the displayed
and plastic grids to coincide vertically.
11. Remove the plastic grid.
12. Turn the monitor power on and off to reset para-
meters.
13. Check for horizontal accuracy while touching
squares with a 0.3 inch device. If there is a re-
sponse for squares to the right or left of the one
touched, adjust horizontal centering and width for
better accuracy.
NOTE: It is acceptable for adjacent squares to be acti-
vated when a square is touched after final video align-
ment.
14. Check for vertical accuracy while touching squares
with a 0.3 inch device. If there is a response to
squares above or below the one touched, adjust
vertical centering and vertical size for better accu-
racy.
Touch Control Performance
Test
NOTE: This procedure requires the PLATO Diagnostic
program in a Z-150 PC Series or Z-160 PC Series
computer with a Z-319 video card installed.
Servicing
The C8-5063-28 Diagnostic Package also can be used
to display the Touch Grid (except for early diagnostic
packages).
1. Connect the computer and the ZVM-133-TC moni-
tor as shown in Figure 1-2 and turn power on for
both units.
2.
Install the PLATO Diagnostic disk which will auto-
matically boot.
3.
Display the PLATO Touch Grid.
4. Select any square on the CRT and note its coordi-
nates.
5.
Point to the selected square by placing a 0.3" di-
ameter pointer on the face of the CRT:
• An audible beep should be heard.
• An 0 should be displayed in the center of the
selected square.
• The X-axis and V-axis coordinates, for the
square being touched, should be indicated in
the left-hand bottom corner of the CRT.
• An X or a 0 may be displayed in a directly adja-
cent square; above, below, right, or left of the
touched square.
NOTE: The display alternates between X and
a
when
a square is repeatedly touched.
6. Touch other squares on the display including the
edges and corners and check for proper re-
sponses as indicated in step 5.
Page 4-15
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