JVC TK-C675BU Service Manual page 21

Measuring
instrument &
No. Item
Input signals
18 Color differ- (INDOOR)
ence matrix • Color bar chart
(indoor/ (just scan)
outdoor) • Oscilloscope
adjustment (H-rate, 10:1)
• Vectorscope
(OUTDOOR)
• Color bar chart
(just scan)
• Filter (80C + 80C)
• Oscilloscope (H-
rate)
• Vectorscope
19 White level • Gray scale chart
adjustment (just scan)
• Oscilloscope
(H-rate, 10:1)
Measuring point (
Adjustment parts (
Mode
Adjustment level (
VIDEO output
LENS IRIS
0.65Vp-p
VIDEO output
24h [B-Y matrix
(indoor)]
23h [R-Y matrix
(indoor)]
Red signal dot:
105 degrees
Blue signal dot:
350 degrees
Red signal dot: 105˚
VIDEO output
LENS IRIS
0.46Vp-p
VIDEO output
6Dh [B-Y matrix
(outdoor)]
6Ch [R-Y matrix
(outdoor)]
Red signal dot:
105 degrees
Blue signal dot:
350 degrees
VIDEO output
LENS IRIS
<U Ver.>
0.714Vp-p [100 IRE]
<E Ver.>
0.7Vp-p
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
60h (B-Y offset)
61h (R-Y offset)
)
)
)
1) Adjust lens iris so that white level of color bar
chart is 0.65Vp-p at VIDEO output.
2) Adjust the SC phase data so that the red sig-
nal dot of the color bar signal appears in the
105 degrees position on the vectorscope.
3) Adjust the R-Y matrix data so that the blue
signal dot of the color bar signal appears in
the 350 degrees position on the vectorscope.
Blue signal dot:
350˚
1) Attach the filters (80C + 80C) to the lens.
2) Set lens iris so that the white level of the color
bar chart at VIDEO output is 0.46Vp-p.
3) Adjust the B-Y matrix data so that the red sig-
nal dot of the color bar signal appears in the
105 degrees position on the vectorscope.
4) Adjust the R-Y matrix data so that the blue
signal dot of the color bar signal appears in
the 350 degrees position on the vectorscope.
1) Attach the infinity adjustment lens with gray
scale chart to the lens.
2) Set lens iris so that the white level of the gray
scale chart at VIDEO output is 0.714Vp-p (U
Ver.) or 0.7Vp-p (E Ver.).
3) Press Enter key. The adjustment is performed
automatically.
Adjustment procedure
2-12