Toshiba M-V19H01, Service Manual

Page: 128 / 166

Alignment and Adjustments (Electrical)
6-8
6-2-8 Center Convergence Adjustment
1. Before attempting convergence adjustments,
the receiver should be powered on for at least
20 minutes.
2. Input a crosshatch pattern from a color bar
generator.
3. Adjust the Brightness and Contrast controls
for a well defined pattern.
4. Adjust the two tabs of the 4-pole magnets.
Change the angle between the tabs, and
superimpose red and blue vertical lines in the
center area of the picture screen.
5. Next, turn both tabs at the same time. Keep
the angle constant, and superimpose red and
blue horizontal lines at the center of the
screen.
6. Adjust the two tabs of 6-pole magnets.
Superimpose the red/blue lines with the
green. Adjusting the angle affects the
horizontal lines.
7. Repeat adjustments 3, 4 and 5. Because the 4-
pole and 6-pole magnets interact, the dot
movement is complex.
Fig 6-7 Center Convergence Adjustment