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(y) Chroma gain and burst phase adjustment
Process Board
Adjusts:
e
Fig. 4-4-47
(x) AIC level adjustment
r
Process Board
Fig. 4-4-49
(z)
Iris indicator level adjustment
Adjust:
Observe:
+
Iris Indicator
Fig. 4-4-48
Fig. 4-4-50
19
Test point:
Adjust:
TP208 (NTSC)
R224 (AIC SET)
•
Keep setting the
lens
iris and connecting CN208
as
in
the
preceding step.
•
Aim the camera at the logarithmic gray
scale
chart.
•
While observing the viewfinder, adjust IRIS INDI
CATOR LE EL
R 121
so
that the iris indicator line
located on the left side of the viewfinder
is
positions
at the center. (Fig. 4-4-50)
R211 (CHROMA GAIN)
C203 (BURST PHASE)
Observe:
ectorscope
R121 (IRIS INDICATOR Deflection
Board LE EL)
iewfinder
INDOOR REC FADE
o o o
Match here
_L
0.71
• Repeat the above steps until the B signal and Y|_
signal match.
• Connect the oscilloscope to TP213 (R) and TP214
(Y L ).
• Overlay
the R signal and the Y|_ signal on the
oscilloscope, and adjust R. TRACKING-3
R203so
that the R signal matches the Y|_ signal in the 8th ~
9th step of gray scale waveform. (Fig. 4-4-47)
• Keep setting the lens iris and connecting CN208 as in
the preceding step
• Aim the
camera
at
the color
chart (YW 2100RB98).
•
Connect the NTSC output to a terminated vector
scope.
•
Adjust CHROMA GAIN
R21 1
so
that the RED
vector on the vectorscope is
equal
to
180%
as
compares to the burst signal. (Fig.
4-4-49)
•
Adjust BURST PHASE
C203
so
that the RED
vector
is
12°
away from
the R Y axis (Fig
4-4-49)
•
Keep setting the lens iris to the automatic iris control
(AIC)
mode as in the preceding step.
•
Disconnect the
jumper
wire between pin 2
of
CN208
and
TP207,
and
connect
CN208.
•
Aim the
camera at
the
logarithmic
gray
scale
chart.
•
Connect the
oscilloscope
to
TP208.
•
Trigger the
oscilloscope
at H.rate.
(Use
TP105
on
deflection
board)
•
Adjust AIC SET
R224
lor
0.71
from
the blanking
level
to
the top
step of the gray scale
waveform. (Fig.
4-4-48)
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