Large Display Adjustments; Image Size Adjustment - IBM 6360 Product Support Manual

LARGE DISPLAY ADJUSTMENTS
Image Size Adjustment
1. Turn the system power off.
2. Perform the rear cover removal.
DANGER:
Operating voltages up to 17,000
volts are present inside the
Large Display.
3. Turn system power on, load the CE
Diagnostic Diskette and select
UTILITIES. Press ENTER.
4. Select DISPLAY
SELECTION Menu.
from the GROUP
Press ENTER.
5. Select TEST PATTERN. Press ENTER.
(The H test pattern should
appear. )
6. Turn the adjustment screws on RI06
and R203 fully counterclockwise to
make the image on the screen the
minimum size. (See Figure 4-14 .)
7.
8.
WARNING: Use care in the fol-
lowi n9 steps. Component dam-
age may occu r if the image size
is increased to where the edges
or corners of the image extend
beyond the inside edge of the
display screen bezel.
Adjust R203 to increase the image
height until the sum of the dimen-
sions V and V' is 20 to 25 mm (0.8
to 1.0 inches) . (See
Figure 4-15.)
Adjust R106 to increase the image
width until the sum of the dimen-
sions H and H' is 20 to 25 mm (0.8
to 1. 0 inches).
Note: If the image is noticeably
off-center, use the Image Center-
ing Adjustment to correct the
problem.
Figure 4-14. Image Adjustment Screws
Inside Edge
ofBezel~,
H -
v
r - - - - ,
----------r-
---------------1
Edge of Pattern after Size
I
A~unmenu
I
r--------------
1
1
1
1
1
:\
Edge of Pattern
with I mage Size
Adjusted for
Minimum
1
I
I
--,
I
1
1
I
1
I '
1
1
~
:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ J
V'
Figure 4-15. Image Size Adjustments
- H'
o
Chapter 4. Large Display 4-13