Table of Contents
Advertisement
•
Loosen the vidicon holding screw. (Fig 4-4-7)
idicon holding screw
NO GOOD
GOOD
Fig. 4-4-10
Fig. 4-4-7
screws.
ol
IC204
on
the
sweep
lher than 6 feel
(2m)
Fig. 4-4-8
Loosen two screws
Backfocus adjusting screw
Rotate vidicon socket
Fig. 4-4-9
9
Line-select 2H
periods.
•
Carefully tighten the
vidicon holding
screw and make
sure that
the waveform remains properly
adjusted.
•
Install the vidicon
socket shield case
B with the two
Fig.
4-4-11
•
Zoom in again and adjust the
focus
by turning the
lens focus.
•
Zoom out again and adjust the focus by turning the
backfocus adjusting screw.
•
Repeat this
procedure
until the
focus
tracks through
out the
zoom
range.
•
Set
the
zoom lens
to the
automatic iris control (AIC)
mode by turning the
iris
setting
screw in
the
zoom
lens
counterclockwise to
unlock
it after setting the
standby power switch to the STANDBY
position.
•
Set the standby power switch
to the
ON
position,
lower
the
liqht.ng level
so
that the lens
ns opens
fully
in
order to have minimum nepth of focus
•
Aim
the
camera
at
an object fur
from
the camera
•
Loosen
the
two backfocus fixing screws slightly (Fig
4-4-11)
•
Zoom
in
(close
up/telephoto) and adjust the
lens
focus.
•
Zoom out (wide angle) and adjust the
focus
by
turning the
backfocus adjusting screw. (Fig.
4-4-
1 1
)
•
Rotate the vidicon
by means
of the vidicon socket
(Fig.
4-4-9)
(CAUTION, 1
600
DCI and stop at
the
point where the
waveform becomes
as
flat as possible
(F>g.
4-4-10)
Ideally, the
waveform should show one flat envelope
of lesser
amplitude
and
one
of greater amplitude,
each with
a
period of
1 H.
Note'
Do not push the
vidicon
forward
while rotat
ing it.
•
Aim the camera at the white chart.
•
Connect the
oscilloscope to
pin
3
process
circuit
board
•
Trigger the oscilloscope at
rate.
(Use
TP106
on
deflection board)
•
Use the delayed
sweep
mode of oscilloscope to
line-select
2H
periods
from the
center of the wave
form.
(
F ig. 4-4-8)
(f) Backfocus adjustment
Adjust:
Backfocus adjusting screw
Observe:
Color monitor
Advertisement
Table of Contents
