Image Centering Adjustment - IBM 6360 Product Support Manual

Image Centering Adjustment
CAUTION:
Be very careful when making this
adjustment because power must be
ON and the centering . rings are in
an area where high voltage is
present.
Make this adjustment only when abso-
lutely necessary.
Note: The image is properly centered
when the outline of the H pattern is
2.5 mm (0.1 inch) from the bezel all
the way around the complete screen,
including the corners.
1. Verify the image size is correct.
(See Image Size Adjustment)
2. With~ the test pattern showing on
the display screen, rotate onaof
the centering rings • until the
square tabs on the two rings are
aligned. (See Figure
4-16.)
3. With the square tabs aligned,
rotate the rings together to cen-
terthe image between the left and
. right edges of the bezel.
Note:
The centering rings can be
rotated 360 degrees.
4. Rotate the two rings in opposite
directions, at the same time and
in equal amounts, to center the
image top to bottom on the screen.
(See Figure 4-16 .)
Inside Edge
ofBezel~
v
r- ---, ---------T----------------l
: Edge of Pattern after Size
Adjustments
~--------------
I
I
I
I
I
i\
I
H -
Edge of Pattern
with Image Size
Adjusted for
Minimum
_ I _
H'
I
i ·
~
L _ _ _ _ _ _ _ _ _ _ -'- _ _ _ _ _ _ _ _ _ _ _ _ _ _
o
V'
o
Figure 4-16. Centering Rings and Image Size After Adjustments
4-14 IBM Displaywriter Product Support Manual