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(24). Burst Gate Pulse Width 1 Adjustment
Test Point:
TP211 (BGP-1)
Adjust:
R794 (BGP-1)
8
Select the CH1-Composite Input by the Device setting,
and supply the Colour Bar signal to the Composite Video
Input Connector of CH1.
8
Connect the Oscilloscope to TP211.
8
Adjust R794 so that the Burst Gate Pulse Width becomes
8.4 µS as shown in Fig. 3-14.
(25). Burst Gate Pulse Width 2 Adjustment
Test Point:
TP205 (BGP-2)
Adjust:
R799 (BGP-2)
8
Select the CH1-Y/C Input by the Device setting, and
supply the Colour Bar signal to the Y/C Video Input
Connector of CH1.
8
Connect the Oscilloscope to TP205.
8
Adjust R799 so that the Burst Gate Pulse Width becomes
8.4 µS as shown in Fig. 3-15.
(26). Y/C Carrier Balance Adjustment
Test Point:
Video Out Y/C Connector
Adjust:
R807 (Y/C CAR BAL-1)
R808 (Y/C CAR BAL-2)
8
Select the CH1-Y/C Input by the Device setting, and
supply the Colour Bar signal to the Y/C Video Input
Connector of CH1.
8
Connect the Vectorscope to the Video Out Y/C Connector.
Input Board
Input Board
t = 8.4 µS
Fig. 3-14
Input Board
Input Board
t = 8.4 µS
Fig. 3-15
Rear Panel
Input Board
Input Board
8
Set the Gain Control of the Vectorscope to the maximum.
8
Adjust R807 and R808 so that the vector positions at the
center of the Vectorscope as shown in Fig. 3-16.
dø
dG
10°
0°
10°
dG
8
Set the Gain Control of the Vectorscope to the normal.
(27). Y/C Y Gain Adjustment
Test Point:
Video Out Y/C Connector
Adjust:
R797 (Y/C Y GAIN)
8
Select the CH1-Y/C Input by the Device setting, and
supply the Colour Bar signal to the Y/C Video Input
Connector of CH1.
8
Connect the Waveform Monitor to the Video Out Y/C
Connector.
8
Adjust R797 so that the Y signal level becomes 700 ± 7
mV as shown in Fig. 3-18.
100
20
–20
–40
(28). Y/C Chrominance Adjustment
Test Point:
Video Out Y/C Connector
Adjust:
R800 (Y/C R-Y GAIN)
R802 (Y/C B-Y GAIN)
R801 (TINT)
8
Select the CH1-Y/C Input by the Device setting, and
supply the Colour Bar signal to the Y/C Video Input
Connector of CH1.
8
Connect the Waveform Monitor to the Video Out Y/C
Connector.
11
Positions at center.
cy
g
R
M
G
V
20%
75%
Y
L
100%
b
U
B
yl
20%
C
G
Y
mg
r
Fig. 3-16
700 ± 7
mV
Fig. 3-18
Rear Panel
Input Board
Rear Panel
Input Board
Input Board
Input Board
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