Display Problems And Their Adjustments - Wyse WY-60 Maintenance Manual

ACTION
18. (Continued)
19. If, after adjustment, the
display is within specification
and looks regular, press the
SETUP key.
If you have adjusted the
display and it still doesn't
conform to specification,
see Chapter
3,
Troubleshooting.
COMMENTS
Table 4-1 suggests
individual adjustments.
If a full alignment is
needed, make all of the
adjustments in Table 4-1,
in the order listed.
Pressing the SETUP key
causes the terminal to
leave test mode.
20 . Tu r nth e t e r min a
1
0
f f . Clos e it,
remove the connectors, and reattach
the communications cables.
Table 4-1 Display Problems and Their Adjustments
Test
Pattern Display Problems
o
Rolling display (early PCBs)
o
Too short or too tall
o
Too wide or too narrow
o
Tilted
o
Not centered
o
Pincushioning; barreling;
crooked edges; corners
sag or move out of
spec i fica t ion
Adjustments
Page
Vertical hold 4-8
Height 4-8
Width
4-8
Yoke lock 4-8
Centering rings 4-8
Display magnets 4-8
M
M
M
Too bright; too dim;
raster scan lines show;
individual problems with
full-bright, dim1, or dim2
Fuzzy letters
Letters at the top of the
display aren't the same
height as those at the
bottom of the display
4-9
Brightness
Focus
Liqearity
4-11
4-11
4-12