Instruction manual
SECTION V
x-v
MONITOR SERVICING
GENERAL
The Model 241
X-
Y Scan
outputs
provide separate X and Y
which are adjustable from X=±4 volts, Y=±3 volts
to
X=±10 volts,
Y~±7.5
volts using
the
X-V
SIZE control.
At
the
control extremes are calibration
marks. When
the
control
is
set
to
these marks,
the
X and Y
calibrated voltages. See SPECIFICATIONS for details.
The
R,G
and B
nals (Z) are separate 0
to
+4 volts (TTL compatible) which can be
turned
on
or
off
using
the
front
panel R,G, B The
amplitude can be adjusted from 0
to
+4
volts
to
control
the
pattern
ness on
all
patterns
except
the
BRIGHTNESS control.
(Gray Scale)
The
(Gray Scale)
pattern
is
a calibrated
the
front
panel
pattern
used
to
adjust black level
on
the
monitor.
For
black and
white
monitors only one gun
signal
is
requir,ed
but
which signal
(R
,G
or
B)
on
the
monitor
connec-
tions. It
is
best
to
activate all GUN CONTROL
buttons.
X-V
SETUP
1. Follow
the
instructions
in
the
GENERATOR OPERATION section
of
the
OPERATING INSTRUCTIONS section
of
this manual for
to
service an
X-V
monitor.
2. Set
the
SCAN MODE
pushbutton
to
X·Y and
turn
the
BRIGHTNESS
and X·Y SIZE controls
to
minimum.
3. Activate
all
of
the
GUN CONTROL switches.
~
4. Select
the
~
(Diagonal Crosshatch)
pattern.
5. Set
PWR
to
ON.
6. Turn
up
the
BRIGHTNESS control until
the
pattern
appears at normal
brightness. Do
not
set
the
brightness
too
high
as
it can cause
of
the
CRT.
7. Adjust
the
X-V
SIZE control until
the
pattern
covers
all
but
about
a
1/2"
border around
the
outside of
the
CRT. Do NOT
beyond
the
edges
of
the
CRT because some monitors contain
fuses
or
circuitry
to
prevent overdrive and these devices may trip
if
the
monitor
is
overdriven.
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