Panasonic CT-24SL14J Service Manual page 194

3. Verify that horizontal width (A & B mark) is within 4.5 ± 0.7 for 20"
models and 5.0 ± 0.7 for 25" models.
13.5.2. Vertical linearity(V-C), V-Size and V-Position adjustment
PREPARATION
1. Apply a crosshatch pattern
2. Normalize the picture settings.
PROCEDURE
1. Enter service mode, select DAC adjustment / "V-POS" and adjust
monoscope pattern to the center vertical position of the CRT
center mark.
2. Adjust linearity data "V-C" so that interval of "a" is same as "b" (a=
b).
3. If the v-position is not at the CRT center, adjust / V position "V
POS" DATA again.
4. Apply a monoscope pattern.
5. Confirm that center horizontal line is in center mark on CRT.
6. Adjust "VEAMP" register for correct vertical size by making
monoscope round circle leaving 4 marks off the CRT edge.
Vertical centering adjustment.
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