Wyse WY-60 Maintenance Manual page 130

2. Move the reticle along a vertical edge of the bezel. Check
the top edge, then the bottom edge, against the straightness
lines etched on the perimeter of the reticle.
3.
Position the upper right corner of the display between the
etched markings on the upper right corner of the reticle.
The display corner edge should fall within the scribed
markings on the corner of the reticle.
4. Repeat the same procedure for the other corners of the
display.
5. If an edge or corner doesn't fall within the markings,
adjust the display (see Chapter 4).
Checking Centering
To check the centering follow these steps:
1. Hold the reticle over the center of the alignment pattern.
2. Move the reticle against the right edge of the bezel, then
the left edge of the bezel. If the right and the left edges
of the alignment pattern are inside the etched lines on the
left and right sides of the reticle, the display is
horizontally centered (see Figure D-3).
3.
If the alignment pattern on the display isn't horizontally
centered, adjust the display (see the instructions in
Chapter 4).
4. Move the reticle against the top bezel edge, then the bottom
bezel edge. If the top and the bottom edges of the
alignment pattern are inside the etched lines on the top and
bottom sides of the reticle, the display is vertically
centered.
5. If the alignment pattern on the display isn't vertically
centered, adjust the display (see Chapter 4).
Checking Vertical Linearity
To check vertical linearity, follow these steps:
1.
Place the right side of the reticle against the right edge
of the bezel (see Figure D-3).
2. Count the number of rows between each etched line on the
reticle. The numbers should be within +15 percent of each
other (90 percent of one line).
3.
If numbers of rows between each line etched on the reticel
aren't equal, adjust the display.
D-5