CONDITIONS
Measurement instrument: Color analyzer
Scanning frequency:
53.7 kHz/85 Hz (15Ó)
43.3 kHz/85 Hz (14Ó)
Display image:
Full white pattern
Brightness:
Maximum
Contrast:
Maximum
PROCEDURE
1. Display the full white pattern.
2. Adjust R-Gain and B-Gain so that the video is
white.
(x = 0.283 ± 0.02 and y = 0.298 ± 0.02)
6-3-5 White Balance Fine Adjustment
CONDITIONS
Measurement instrument: Color analyzer
Scanning frequency:
53.7 kHz/85 Hz (15Ó)
43.3 kHz/85 Hz (14Ó)
Display image:
Full white pattern
X-Y coordinates:
x = 0.283 ± 0.02
y = 0.298 ± 0.02
PROCEDURE
1. Adjust the Contrast control so that the
brightness of the video is about 5 ft-L.
2. Check whether the white coordinates of the
video meet the specification above. If they do
not, adjust them so that they do.
3. Adjust the Contrast to maximum luminance.
4. Check whether the white coordinates still
meet the specification above. If they do not,
adjust them so that they do.
6-3-6 ABL Point Adjustment
CONDITIONS
Measurement instrument: Color analyzer
Scanning frequency:
53.7 kHz/85 Hz (15Ó)
43.3 kHz/85 Hz (14Ó)
Display image:
Full white pattern
Brightness:
Maximum
Contrast:
Maximum
PROCEDURE
Adjust ABL so that the brightness level is
35 ± 1 ft-L.
6-3-7 Focus Adjustment
CONDITIONS
Measurement instrument: Color analyzer
Scanning frequency:
53.7 kHz/85 Hz (15Ó)
43.3 kHz/85 Hz (14Ó)
Display image:
ÒHÓ character pattern
Brightness:
Maximum
Contrast:
Maximum
PROCEDURE
1. Adjust the Focus VR on the FBT to display the
sharpest image possible.
2. Use Locktite to seal the Focus VR in position.
6-3-8 Luminance Uniformity Check
CONDITIONS
Measurement instrument: Color analyzer
Scanning frequency:
53.7 kHz/85 Hz (15Ó)
43.3 kHz/85 Hz (14Ó)
Display image:
White flat field
Brightness:
Cut off point at 30 ft-L
PROCEDURE
Measure luminance at nine points on the display
screen: top left corner, top center, top right corner,
center row left side, center, center row right side,
bottom left corner, bottom center, and bottom
right corner.
6 Alignment and Adjustments
6-6
CHA42*7L/5**7L
Содержание CHA4217L
Страница 2: ...Samsung Electronics Co Ltd August 1998 Printed in Korea Code No BH68 61127A ...
Страница 10: ...Memo 3 Product Specifications 3 4 CHA42 7L 5 7L ...
Страница 14: ...5 Disassembly and Reassembly 5 2 CHA42 7L 5 7L Memo ...
Страница 62: ...9 Electrical Parts List 9 14 CHA42 7L 5 7L Memo ...
Страница 64: ...Memo 10 Block Diagrams 10 2 CHA42 7L 5 7L ...