Convergence Adjustment - Sanyo DS24424 Service Manual

CONVERGENCE ADJUSTMENT

CENTER CONVERGENCE ADJUSTMENT
1. Connect a crosshatch generator to antenna terminals.
2. Set Contrast to low level to eliminate blooming. Reduce
Brightness level to obtain black background if necessary.
3. Adjust the angle between the four-pole magnet tabs 1
and 2 (Figure 2), and superimpose the red and blue ver-
tical lines in the center area of the picture screen. See
Figure 4.
4. Keeping the tabs at the same angle, rotate them together
to superimpose the blue and red horizontal lines in the
center area of the picture screen. See Figure 4.
5. Adjust the six-pole magnet tabs 3 and 4 so the con-
verged red/blue line is superimposed on the green line.
This is the same procedure used in steps 3 and 4. See
Figure 5.
BLUE
Adjust four-pole tabs angle to
superimpose blue and red vertical
line.
Figure 4. Blue and Red Line Movement
BLUE / RED
Adjust six-pole tabs angle to
superimpose red / blue and
green vertical line.
Figure 5. Blue/Red and Green Line Movement
RED
Adjust four-pole tabs together
to superimpose red and blue
horizontal line.
GREEN
Adjust six-pole tabs together
to superimpose red / blue and
green horizontal line.
OUTER AREA CONVERGENCE ADJUSTMENT
The outer area convergence is performed by positioning of
the yoke as follows:
1. Move the top of the yoke toward or away from the pic-
ture tube. This movement will affect the vertical lines at
the top and bottom and the horizontal lines at the sides.
See Figure 6.
2. Check that splits at 12 o'clock and 6 o'clock positions
are minimized, adjust yoke for best compromise.
Secure with wedge at 12 o'clock position. See Figure 1.
3. Move the side of the yoke toward or away from the pic-
ture tube to converge the horizontal lines at the top and
bottom and the vertical lines at the sides. See Figure 7.
4. Check that splits at 12 o'clock and 6 o'clock are mini-
mized, adjust yoke for best compromise. Secure yoke
position with the side wedges. See Figure 1.
Note: When re-using the rubber wedges, apply a small
amount of silicone rubber adhesive or hot melt to
each of the wedges.
Figure 6. Top of Yoke Movement
BLUE
GREEN
RED
Figure 7. Side of Yoke Movement
— 13 —
GREEN
RED
BLUE
BLUE
GREEN
RED
Line movement when adjusting
top of yoke in and out.
BLUE
GREEN
RED
BLUE
GREEN
RED
Line movement when adjusting
side of yoke in and out.
BLUE
GREEN
RED