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Service Manual
9.
If the position of the dots moved after repeated
adjustments, adjust until the movement of the dots
is minimized.
10. Turn the red focus VR fully clockwise.
11. Adjust the 4-pole magnets until the shape of the
dots at the center of the screen is circular.
12. Adjust red focus VR until optimum focus is
achieved.
13. Apply NTSC monoscope pattern.
14. If the center of the monoscope pattern is not inside
the 15.0mm circle, shown in Figure 29, adjust the
centering magnets. Repeat the alignment magnet
adjustments and four pole magnet adjustments
(step 1. ~ step 12.).
15. Apply an NTSC cross hatch pattern with dots.
16. Cover red and blue lenses projecting green only.
17. Repeat above procedures for the green.
18. Enable digital convergence by changing DAC
MUTE from 1 to 0.
19. Following adjustments, paint position of DY
centering magnets and fix the centering magnets
of DY, dummy rings of VM coil, four pole magnets
of VM coil and the alignment magnets of VM coil to
prevent them from moving.
Note: Please See “Serviceman Mode (Electronic
Controls)” on page 25 for entering and exiting
Service Mode.
Vertical Size Adjustment (VSIZE)
1.
Apply an NTSC monoscope pattern.
2.
Cover red and blue lenses.
3.
Set DAC MUTE from 0 to 1 (disabling digital
convergence).
4.
Adjust centering magnets so that the center of
pattern get aligned with screen frame center.
5.
Adjust DAC (VSIZE) until vertical size is 3.5±0.1 on
top and bottom lines. (See Figure 30)
6.
Remove lens covers and enable digital
convergence by changing DAC MUTE from 1 to 0.
Horizontal Phase Adjustment (H-POS)
1.
Apply a crosshatch pattern.
2.
Set DAC MUTE from 0 to 1 (disabling digital
convergence).
3.
Cover both red and blue lens so that only the green
lens is projecting the monoscope pattern.
4.
Turn Green deflection yoke until line is perfectly
horizontal.
5.
Adjust H-POS DAC data so that pattern is in the
center of screen.
6.
Enable digital convergence by changing DAC
MUTE from 1 to 0.
7.
Remove lens covers.
Trapezoid Adjustment (EWTRA)
Procedures:
1.
Cover Red and Blue Lenses.
1.
Apply a crosshatch pattern.
2.
Set DAC MUTE from 0 to 1 (disabling digital
convergence).
3.
Adjust DAC EWTRA (trapezoid) by pressing VOL
right-left to correct image, less than 30mm on top
and bottom left side(See Figure 32).
Figure 32. Trapezoid Adjustment
4.
Enable digital convergence by changing DAC
MUTE from 1 to 0 and remove caps from lenses.
Figure 29. Centering magnet
1.0
3.0
Figure 30. Vertical Size Adjustment
Picture
Area
Screen
Frame
Deflecting
Area
Figure 31. H Phase Adjustment
Correct Adjustment
Incorrect Adjustment
Содержание PT-51HX41CE
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Страница 53: ... 54 ALL MODELS A Board Schematic Right Middle Portion ...
Страница 54: ... 55 ALL MODELS A Board Schematic Right Portion ...
Страница 55: ... 56 ALL MODELS DH Board Schematic ...
