GE 4PE21A1 Instructions Manual page 22

EBI-3657
until
the picture highlights have been discharged.
6.
Deflection
Size and Centering
a. Remove the lens holder and insert
the deflection
gauge
in the Vidicon tube retaining
ring. Illuminate
the
deflection
gauge using
a
100 to 150 watt frosted bulb held approximately four
feet from
in
front
of the Vidicon Camera.
b.
If the engraved rectangle
is
not visible
on the
monitor
screen, readjust the Vidicon Control Panel TARGET control, R24; and
BEAM control, R18; until
it
does become visible.
c.
Rotate
the
deflection gauge
so
that
the rectangle
is
in alignment with
the monitor
raster.
Adjust
the
Vidicon Control
Panel controls HEIGHT,
R42; WIDTH, R70;
H
CENT, R72; and
V
CENT, R50;
until
the
four sides
of the gauge rectangle are just visible within
the four sides
of the
monitor raster.
d.
Remove
the
deflection gauge and replace
the lens
holder. Focus
the
Vidicon Camera
on the
projected
test chart then
adjust the position
of the camera with respect
to the test pattern
so
that the projected picture just fills the
monitor
raster.
Optical focus must
be
maintained throughout this procedure.
If
necessary, rotate
the
deflection assembly for proper positioning.
7.
Hi Peaker Adjustment
a.
Set the Channel Amplifier
switch, APER CORR,S1,
in
position
1,
then adjustthe
HI
PEAK capacitor,
C13,
for minimum smear
at
black
to white transitions.
$.
Vidicon Alignment
a.
Adjust
the
two Vidicon Control Panel ALIGN controls,
R17 and R19
so
that when
the
FOCUS control,
R22,
is
rotated through
focus,
the center portion
of the
picture will rotate with no radial
motion. Continue this adjustment
to
obtain maximum flatness of the
picture video
in
both
the
horizontal and vertical directions.
Adjust
the
H
PARAB control,
R95,
for
the
(latest horizontal video.
9