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36
Fig. 4-8
Adjust VR406 so that the Luminance level becomes 700 ±
14 mV as shown in Fig. 4-9.
Fig. 4-9
Press CH4 button on the Front Panel.
Observing the Waveform Monitor, fine adjust VR403 and
VR405 for the Buffer Amplifier U, VR408 and VR410 for
the Buffer Amplifier L so that the difference between
Buffer Amplifiers U and L and without flicker.
(6). RA Decoder Adjustment
Test Point:
Recording Output Jack
Rear Panel
Adjust:
VR101 (RA C-GAIN)
Main Board
VR102 (RA C-PHASE)
Main Board
VR103 (RA PHASE 2)
Main Board
VR404 (B-Y C-GAIN (U))
Main Board
VR409 (B-Y C-GAIN (L))
Main Board
T101 (RA PHASE 1)
Main Board
Supply the Ramp (with carrier) signal to the Camera Input
1 Connector on the Rear Panel.
Set VR101 to VR103 to their mechanical center position.
Set the core of T101 becomes flat as the upper surface of
T101.
Press the VTR/Camera Selection button on the Front
Panel.
Adjust VR103 and T101 so that the vector positions on the
B-Y Axis of the Vectorscope as shown in Fig. 4-10.
0 mV
+ 7
– 0
700 ± 14 mV
300 ± 30 mV
Fig. 4-10
Supply the Colour Bar signal to the Camera Input 1
Connector on the Rear Panel.
Connect the terminated Oscilloscope with 75
Ω
to the
Recording Output Jack on the Rear Panel.
Adjust VR101 so that the R-Y vector positions their
respective boxes as shown in Fig. 4-11.
Adjust VR404 so that the B-Y vector positions their
respective boxes as shown in Fig. 4-11.
Fig. 4-11
Repeat adjustment VR103 and T101 and VR101 and
VR404 so that the Chroma vector positions their respec-
tive boxes as shown in Fig. 4-12 and the Chroma Phase
as shown in Table 4-1.
Fig. 4-12
Table 4-1
Press the CH1 button on the Front Panel.
Adjust VR409 so that the B-Y level of the Buffer Amplifier
L becomes correct gain.
cy
g
M
G
Y
L
yl
B
b
G
C
Y
dG
10°
0°
10°
dø
100%
75%
R
V
U
mg
r
20%
20%
dG
B – Y
cy
g
M
G
Y
L
yl
B
b
G
C
Y
dG
10°
0°
10°
dø
100%
75%
R
V
U
mg
r
20%
20%
dG
cy
g
M
G
Y
L
yl
B
b
G
C
Y
dG
10°
0°
10°
dø
100%
75%
R
V
U
mg
r
20%
20%
dG
Phase
103 ± 5°
283 ± 7°
167 ± 8°
Chroma
220 ± 7°
220 ± 7°
155 ± 10°
R
Cy
YL