JVC TK-C675BE, Service Manual

Page: 17 / 66

Item Mode Adjustment procedure
Measuring
instrument &
Input signals
No.
Measuring point ( )
Adjustment parts ( )
Adjustment level ( )
1) Set lens iris so that the white level of the color
bar chart is 0.65Vp-p.
2) Adjust the 1H delay gain (Cyan) data so that
the dots of different colors are superimposed
on the vectorscope.
10 Color
difference
balance(2)
adjustment • Color bar chart
(just scan)
• Oscilloscope
(H-rate, 10:1)
• Vectorscope
VIDEO output
LENS IRIS
0.65Vp-p
VIDEO output
31h (1H delay gain
(Cyan))
Chroma (colored) dots
should be superim-
posed.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
0.65 Vp-p
1) Close the lens iris.
2) Adjust the Burst phase data so that the angle
of burst phase is 90 degrees on the
vectorscope.
12 Burst phase
adjustment
(E Ver. only) • Vectorscope VIDEO output
2Ah (Burst phase)
Angle of burst phase
is 90 degrees.
R-Y
B-Y
R-Y
B-Y
R-Y
B-Y
1) Close the lens iris.
2) Adjust the Blue carrier balance and Red car-
rier balance data alternately so that the dot
on the vectorscope is center.
(It is recommended to be easier to see that
the gain of vectorscope is boosted.)
11 Carrier
balance
adjustment • Vectorscope
• It is not neces-
sary the infinity
adjustment lens
for this adjust-
ment.
VIDEO output
27h
(Blue carrier balance)
28h
(Red carrier balance)
2-8
90
°
90
°