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Vertical linearity adjustment (V-C)
Preparation:
1.
Apply a crosshatch pattern
Procedure:
1.
Confirm that vertical picture is centered, or adjust
“VRAS” data to correct.
1.
Enter service mode, adjust linearity data “V-C” so
that interval of “a” is same as “b” (a=b).
(see Fig. 34)
Vertical correction adjustment (V-S)
Preparation:
1.
Apply a Crosshatch pattern.
2.
If b-a<-1.5mm (in top and bottom), increase “V-S”
data by one step and adjust; repeat step until
b-a
≤
1.5mm
3.
If b-a>-1.5mm (in top and bottom), decrease “V-S”
data by one step; repeat steps until b-a
≤
1.5mm.
Vertical size and vertical position
adjustment
(VEAMP & VRAS)
Preparation:
Apply a pattern that permits the centering of the
image.
Procedure:
1.
Enter service mode
2.
Adjust “VRAS” to center the picture to the marks on
the CRT.
3.
Adjust “VEAMP” to make image not wide or narrow
vertically.
PCC adjustment (PCC)
This adjustmet helps to correct left and right curved
sides of picture.
Preparation:
1.
Apply a crosshatch pattern
2.
Normalize the picture icon video adjustments.
Procedure:
1.
Adjust “PCC” DATA so that the 1st line and 3rd line
make a good balance (see Fig. 36).
Corner PCC adjustment
(TOPG, TOPSL, BTMG, BTMSL)
This controls help to adjust top and bottom sides
of picture
Preparation:
1.
Apply a Crosshatch pattern
2.
Normalize the picture icon video adjustments.
Procedure:
1.
Adjust “TOPG” and “TOPSL” data to correct upper
side of the image linearity.
2.
Adjust “BTMG” and “BTMSL” data to correct lower
side of the image (see Fig. 37)
a
a=b
b
Figure 34. Linearity adjustment
a
b
Figure 35. V-Adjustment
Min. Adjustment
Correct Adjustment
Max. Adjustment
Figure 36. E-W PCC adjustment
Min. Adjustment
Correct Adjustment
Max. Adjustment
Figure 37. Top and bottom adjustment
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