Instruction manual
for
monitors
will vary from
monitor
to
monitor
often
even with
monitors
from
the
same manufacturer.
It
is
advisable always
to
use
the
manufacturer's
Service Instructions when performing adjustments
to
monitors.
Presented here
is
a review
of
adjustments normally
on
monitors
and
the
recommended
patterns
associated
with
each.
PURITY, STATIC CONVE DYNAMIC CONVERGENCE and
Ich,.,,,,,n'i'c
are
common
to
Raster Scan and
X-Y
monitors
and are presented separately.
DISPLAY PATTERN
USES
The
various
table lists some
of
the
monitor
adjustments for which
the
patterns
are used.
2.
3.
Static
convergence
4.
convergence
5. Black level
6. Black and
white
tracking
Scale
CENTERING AND POSITIONING
PATTERNS
Diagonal Crosshatch,
or
Single
Crosshatch
Diagonal Crosshatch,
or
Single
Crosshatch
Single Crosshatch, or Diagonal
Crosshatch
Diagonal Crosshatch,
and
Raster
Gray Scale Staircase
Gray Scale Staircase
Most
monitors
contain
screwdriver
type
controls for adjusting centering
and These
controls
are generally intended for fine tuning
of
these
parameters.
If
gross
must
be
made,
it generally involves move-
ment
of
the
assembly which can be accomplished
in
conjunction
with
PURITY and CONVERGENCE
For
and positioning set
the
generator
to
the
II
(Single
Crosshatch)
pattern
and
the
X-V
SIZE for a convenient picture size.
Refer
to
the
manufacturer's
literature for location and adjust for
the
lines
to
cross
in
the
center
of
the
CRT.
-19-
HEIGHT, WIDTH, LINEARITY
If
the
X and V deflection
is
known
the
Diagonal Crosshatch
or
Single Crosshatch
pattern
using
the
equations presented below.
If
the
ri"'I'It>r'hr,,,
known,
then
the
monitor
can be set
up
aspect ratio
of
4:3
(X:Y) and final sensitivity
the
game.
Proceed as follows:
1.
Set
generator
output
to
Diagonal Crosshatch
pattern.
as required.
2.
Set
SIZE control
to
minimum CAL
ThEl
pattern
now has a calibrated
output
of
Y=±3V.
A)
If
the
monitor
call for
adjust
the
monitor
SIZE
controls
for a
the
screen. Typical lengths
on
19"
14.5"
and
V=10.5".
B)
If
the
monitor
call for
X=::!:10V
and
the
X-V SIZE
control
to
the
upper CAL
size controls for a picture which covers
the
lengths
on
a
19"
screen are
X=14.5"
and Y=1O.5".
3.
If
the
monitor
specifications call for sensitivities
other
Y=±3V
or
X=±10V, Y=±7.5V
the
proper
sensitivity can
help
of
the
deflection size
equations
below.
To
using
the
equations
proceed
as
follows.
A}
Set
the
X-Y
SIZE
control
to
the
minimum CAL (X=:t4V,
Y=±3V).
The
signals producing
the
Crosshatch and
Crosshatch are calibrated
of
X=±4V and
V=:+:3V.
B)
Determine
the
desired deflection sensitivity
turer's
literature. Measure
the
"X"
and
"Y"
using a ruler. Dimensions on a
19"
Y=10.5".
C)
To
find
the
length
of
the
"X"
size
of
the
pattern
and perform
the
arithmetic.
X length = Measured
width
of
screen
("S"
above)
Using
the
monitor
X size
screen
to
the
"X
length" determined
-20-