Vector 4 - Page 142

VECTOR 4
TECHNICAL INFORMATION
9. Horizontal Centering controls the placement of the data field on the
screen.
The
ineorrect
screen
may
be
positioned
to
the
right,
left
and/or
partially off the CRT. The screen can be centered by adjusting the
L102 coil. This adjustment is used for "fine" screen adjustments. Step 10
describes a procedure that can used to center the screen for "coarse"
B
fl ¥
g
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.
1072
Exhibit III-2 gives a close-up view of the CRT's neck. This illustration clearly
shows the centering magnet adjustments and the deflection coils. These
components are moved to make different screen adjustments.
CAUTION
DO NOT TOUCH ELECTRICAL TERMINALS ON CRT OR YOKE. CRT USES
EXTREMELY HIGH VOLTAGES. |
10, exists when the centering magnets are out
of adjustment. The screen can show one several different types of data
fields. The diagrams below show screens which have the correct linearity
but are positioned incorrectly on the screen. |
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EEEEEE.EEEE EEEEEE.IFEZZE
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Cr oS’ T LT
a. Locate the two Centering Magnet Adjustment Levers on the neck of
the CRT.
b. One lever moves the raster clockwise (up and to the right) while
the other lever moves the raster counter-clockwise (down and to the
left). Turn these levers until the scereen is centered. For finer
centering adjustments, see Step 9. Refer to Exhibit III-2 for
location information.
09-01-82 7200-0001 I 2-5