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(d) Focus coarse adjustment
R116 (FOCUS)
Deflection Board
Adjust:
NO
GOOD
GOOD
Observe:
Color monitor
Fig. 4-4-3
Rotate alignment magnets
(e)
idicon rotation
Process Board
Fig.
4-4-4
Remove two screws
GOOD
NO GOOD
Fig.
4-4-5
Ground lead
Fig. 4-4-6
8
•
While observing the color monitor, adjust FOCUS
R 116 for minimum green tint in the center. At this
time, the center portion of R and B signal waveforms
at TP213 and TP212 become maximum. (Fig. 4-4-3)
Test point:
Adjust:
idicon socket
shield case B
•
Then while observing the
color
monitor,
rotate the
alignment magnets (see
Fig.
4-4-4)
for minimum
green
tint
in the center and maximum magenta
(red)
throughout the picture area
At
this time,
the waveform
peaks of
R and
B
signals
are
same in
phase and
maximum in
amplitude (Fig
4-4-5)
Pin 3 of IC204 (Rc/Bc)
idicon
•
Keep
the lens iris set as in the preceding step.
•
Keep connecting
the jumper wire as in the preceding
step.
•
Aim the camera
at the white chart.
•
While observing the color
monitor,
adjust
FOCUS
R116
for
minimum
green
tint
and maximum
magenta (red) throughout picture area.
•
If bright green area appears at the corner of the
monitor,
readjust the beam alignment while referring
to
"
(c)
Beam
alignment adjustment" on page 7.
•
If green tinted areas still remain after repeating
the
beam
alignment,
they will
be minimized
by
the
dynamic focus and signal shading adjustment which
follow.
• Overall
focus
is affected by the beam alignment
adjustment so readjust FOCUS
R116 occasionally
while performing beam alignment adjustment
•
If a bright green area appears at the corner of the
monitor,
readjust
the
beam
alignment with
the
alignment magnets.
•
If green tinted areas still remain after repeating the
beam
alignment,
they will
be minimized by the
dynamic
focus and signal shading adjustments which
follow.
•
Keep setting
the lens
iris
and connecting the jumper
wire as in the preceding step.
•
Remove
the two screws which hold the vidicon
socket
shield case
B ,
and remove the shield
case.
(Fig. 4-4-6)
Note:
The ground lead for the vidicon socket must be
installed on the chassis. (Fig.
4-4-6)
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