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DIDS-40Z-ZM10
Para
z~3fz-3.
5
Z- 3 ALIGNMENT AND ADJUSTMENT PROCEDURES
The following alignment and adjustment p.rocedures are provided to enable
the repairman to set up the Display Terminal for optimum performance.
Z- 3.1.t\lignment of HorizontalandYertical
Den~cti9rt
Al;l:lplifie.J:' A2
a.
b.
d.
Adjust vertical centering control R4 (figure 2-5) to center the
raster vertically on the disp1.ay tube.
, Adjust vertical amplifier control R27 (figure 2-5) to produce the-
frame height.
Adjust horizontal centering control R35 (figureZ-5) to center
the ra.ster horizontally on the display tube.
Adjust horizontal amplitude control R50 (figure 2-5) to produce
the frame width.
. .
.
2- 3. Z Adjustment of Video Level on Video Amplifier A8
a.
Depress FRAME RESET key·.
b.
Adjust BEAM CUR. control R2 until cursor shows in first
character, first line pos.ition. Set for required cha,racter brightness.
c.
Adjust video level control R7 (figure 2-6) until character
boxes just appear on sweeps.
2- 3.3 Adjustment of MONO' FOCUS Control A6-R4.
Observe cursor and adjust
MONO FOCUS control R4 on circuit board A6,(figure 2-1) for the sharpest cursor
image ( ). ,
.2- 3.4 Adjustment of CRT FOCUS Control A6-R9.
Adjust CRT FOCUS Control
R9 on circuit board A6 (figure 2-1) for the sharpest cursor image
(=)-
possible.
Z- 3.5 Delay Line Adjustment
2-8
Note
It should not be neces sary to adjust the delay
lin.e more than six turnsccw or cw from the
factory adjustment.
a.
Single delay-line adjustment
(1)
Depress and release the FRAME RESET key and at the same
time turn the delay-line adjustment screw two turns.
(2)
Repeat step (1 ) above until the screen displays stable charac-
ters.
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