Technical data
6-1
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~llcM6~rl
_ 98760
Adjustments
.
Tools Required
Part
No.
Description
09020-10010
System Integrity Test
(SIT)
Discs
HP
3476
(or equivalent) Digital Multimeter
Photodyne 19XE Radiometer
8710-1388
CRT Alignment Tool (or non conducting screwdriver)
8710-0900
#2
Pozidrive Screwdriver
Adjustments Summary
Adjustments to the
98760
consist of a color intensity alignment procedure, which
is
part
of
the
System Integrity Test (SIT),
and
the horizontal
and
vertical centering adjustments that center the
display raster on the CRT. The clamp
and
gain pots for each CRT gun (red, green,
and
blue) are
located
on
the video drive board. The horizontal
and
vertical centering adjustments are located
on
the sweep board.
Note
The
RFI
Cage Door does not have to be
opened
to access the pots
on
the video drive board.
Adjustments
WARNING
OBSERVE ALL WARNINGS
AND
SAFETY PROCEDURES
IN
THE
SERVICE
MANUAL.
LETHAL VOLTAGES ARE PRESENT INSIDE
THE
COMPUTER.
Internal Intensity (Color Alignment)
1.
Load the SIT TEST system boot discs.
2. Load the SIT Mainframe Test
Programs disc.
3.
Type:
LOAD
"TEST:
INTERNAL"
t1
(
EXECUTE)
4. Follow instructions
on
the display
and
select AGRAPHICS when the test
menu
is
presented.
5. Select the INTERACTIVE test under
AGRAPHICS
and
step through the procedures as
directed. The video board contains
all
clamp pots, gain pots,
and
test points. The
sweep
board contains the screen grid adjustment and several other adjustments.