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6-3-4 (d) WHITE BALANCE ADJUSTMENT VERIFICATION
Refer to the procedure for 9300K, section 6-4-2 (d).
6-3-5 Luminance Uniformity Check
Luminance is considered uniform only if the ratio
of lowest to highest brightness areas on the screen
is not less than 7.5:10.
CONDITIONS
Scanning frequency:
68 kHz/85 Hz
(1024 x 768)
Display image:
White flat field
Display size
352 (H) x 264 (V) - 19”
306 (H) x 230 (V) - 17”
Brightness:
Cut off point
Contrast:
Maximum
PROCEDURE
Measure luminance at nine points on the display
screen (see figure below).
6-3-6 Focus Adjustment
CONDITIONS
Scanning frequency:
68 kHz/85 Hz
Display image:
“H” character pattern
Brightness:
Cut off point
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.
6-3-7 Color Purity Adjustment
Color purity is the absence of undesired color.
Conspicuous mislanding (unexpected color in a
uniform field) within the display area shall not be
visible at a distance of 50 cm from the CRT
surface.
CONDITIONS
Orientation:
Monitor facing east
Scanning frequency:
68 kHz/85 Hz
Display image:
White flat field
Luminance:
Cut off point at the center
of the display area
Note:
Color purity adjustments should only be
attempted by qualified personnel.
PROCEDURE
For trained and experienced service technicians
only.
Use the following procedure to correct minor
color purity problems:
1. Make sure the display is not affected by
external magnetic fields.
2. Very carefully break the glue seal between the
2-pole purity convergence magnets (PCM), the
band and the spacer (see Figure 6-11 and
6-12).
3. Make sure the spacing between the PCM
assembly and the CRT stem is 29 mm ± 1 mm.
4. Display a green pattern over the entire display
area.
5. Adjust the purity magnet rings on the PCM
assembly to display a pure green pattern.
(Optimum setting: x = 0.295 ± 0.015,
y = 0.594 ± 0.015)
6. Repeat steps 4 and 5 using a red pattern and
then again, using a blue pattern.
Table 6-3. Color Purity Tolerances
(For 9300K color adjustment: x = 0.283 ± 0.02, y = 0.298 ± 0.02)
7. When you have the PCMs properly adjusted,
carefully glue them together to prevent their
movement during shipping.
6 Alignment and Adjustments
CSH7839L/CSH9839L
6-7
Red:
x = 0.640 ± 0.015
y = 0.323 ± 0.015
Green:
x = 0.295 ± 0.015
y = 0.594 ± 0.015
Blue:
x = 0.142 ± 0.015
y = 0.066 ± 0.015
Figure 6-10 Luminance Uniformity Check Locations
Summary of Contents for SyncMaster 700p Plus
Page 2: ...Samsung Electronics Co Ltd April 1998 Printed in Korea Code No BH68 61072A ...
Page 47: ...8 Exploded View and Parts List 8 1 Front Cover CRT Ass y CSH7839L CSH7839L CSH9839L 8 1 ...
Page 48: ...8 2 Chassis Stand Ass y CSH7839L 8 Exploded View Parts List 8 2 CSH7839L CSH9839L ...
Page 49: ...8 3 Rear Cover Ass y CSH7839L 8 Exploded View Parts List CSH7839L CSH9839L 8 3 ...
Page 50: ...8 Exploded View Parts List 8 4 CSH7839L CSH9839L 8 4 Front Cover CRT Ass y CSH9839L ...
Page 51: ...8 5 Chassis Stand Ass y CSH9839L 8 Exploded View Parts List CSH7839L CSH9839L 8 5 ...
Page 52: ...8 6 Rear Cover Ass y CSH9839L 8 Exploded View Parts List 8 6 CSH7839L CSH9839L ...
Page 76: ...9 Electrical Parts List 9 24 CSH7839L CSH9839L Memo ...
Page 78: ...Memo 10 Block Diagrams 10 2 CSH7839L CSH9839L ...
Page 80: ...Memo 11 PCB Diagrams 11 2 CSH7839L CSH9839L ...
Page 82: ...13 1 CSH7839L CSH9839L 13 Schematic Diagrams 13 1 Power Part Schematic Diagram ...
Page 84: ...13 Schematic Diagrams 13 3 CSH7839L CSH9839L 13 2 Micom H V Process Part Schematic Diagram ...
Page 86: ...13 Schematic Diagrams 13 5 CSH7839L CSH9839L 13 3 Main Part Schematic Diagram ...
Page 88: ...13 Schematic Diagrams 13 7 CSH7839L CSH9839L 13 4 Video Part Schematic Diagram ...
Page 90: ...13 Schematic Diagrams 13 9 CSH7839L CSH9839L 13 5 CRT Socket Control Part Schematic Diagram ...