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9. Slowly move the deflection yoke forward. Adjust for the best overall green screen.
10. Temporarily tighten the deflection yoke.
11. Produce blue and red rasters by adjusting the-low-light controls.
Check for good purity in each field.
12. Tighten the deflection yoke.
4-3-7. Center Convergence Adjustment
1. Warm up the receiver for at least 30 minutes.
2. Adjust the two tabs of the 4-pole magnets Change the angle between them.
Superimpose the red and blue vertical lines in the center area of the screen.
3. Adjust the BRIGHTNESS and CONTRAST controls for a well-defined picture.
4. Adjust the two tabs of the 4-pole magnets, and change the angle between them.
Superimpose the red and the blue vertical lines in the center area of the screen.
5. Turn both tabs at the same time, keeping the angle constant, and superimpose the red and
blue horizontal lines in the center of the screen.
6. Adjust ing two-tabs of 6-pole magnets to superimpose the red and blue lines onto the green.
Adjusting the angle affects the vertical lines, and rotating both magnets affects the horizontal
lines.
7. Repeat adjustments 2-6, if necessary.
8. Since the 4-pole and 6-pole magnets interact, the dot movement is complex(fig B-3).
6 Pole Magnet
Clamper
Screw
FIG. B-1 CONVERGENCE MAGNET ASSEMBLY
4 Pole Magnet
2 Pole Magnet
14
2 Pole
PURITY
6 Pole
CONVERGENCE
4 Pole
CONVERGENCE
YOKE
CLAMP
SCREW
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