Kaypro 2 - 07-01.TIFF

7.1 HARIH\RE ~<NS 1\ND ADJUS'IMENl'S
Figure 7.1
Dotronix video board
V. Hold
-
VWidth
-
At the current time Kaypro is using eRr
assemblies produced by Dotronix, Elston, and
Toshiba. The adjustment pots are positioned in
di fferent locations on the toards and can be
located by using figures 7-1, 7-2, and 7-3.
These pots are factory aligned and norma 11 y
need no adjustment. 'The pllrjX)se of these
ad justments is to obtain the correct size,
centering, and brightness of the display.
Use only non-metallic tools when making these
adjustments.
Focus
H.Width
I H. Hold
I
Shrink Vert.
Before any adjustments are made on the video
board, the ALIGN diagnostic should be invoked.
This will fill the screen with H's and aid in
adjustment.
HOUZCNrAL CENTERING
Figure 7.2
Elston video board
Bright
-
Vert. Size
--
Check to see that the pattern is centered on
the screen. ACijust the horizontal hold pot
until the display is correctly centered. en
the Elston video board, adjust the video
centering pot.
VERI'ICAL SIZE AND LINEARITY
The ..fOllowing two procedures are to be
pernormed alternately until correct display is
obtained.
Adjust the vertical size pot to obtain pattern
height of approximately 4-7/8 inches.
Width
o
Video Centering
-
Focus
-
V. Hold
-
V Lin
ACijust vertical linearity pot until all
characters are the same vertical size, top to
rottc::m.
HOUZCNrAL WIIJl'H
ACijust the horizontal width pot to obtain a
display width of approximately 7 inches.
7-1