KV-29AL40 - Sony TV Service Manual (repair manual). Page 14

   The following adjustments should be made when a complete
realignment is required or a new picture tube is installed. These
adjustments should be performed with rated power supply
voltage unless otherwise noted.

The controls and switch should be set as follows unless
otherwise noted:

PICTURE control ................. normal

BRIGHTNESS control ......... normal

• Feed in the white pattern signal.
• Before starting, degauss the entire screen.

1. Input a raster signal with the pattern generator.

2. Loosen the deflection yoke mounting screw, and set the purity

control to the center as shown in Fig.2.

3. Turn the raster signal of the pattern generator to green.

4. Move the deflection yoke backward, and adjust with the purity

control so that green is in the center and red and blue are at the
sides evenly. (Fig.3)

5. Move the deflection yoke forward, and adjust so that the entire

screen becomes green. (Fig.1)

6. Switch over the raster signal to red and blue and confirm the

condition.

7. When the position of the deflection yoke is determined, tighten

it with the deflection yoke mounting screw.

8. When landing at the corner is not right, adjust by using the disk

magnets. (Fig.4)

 Perform the adjustments in order as follows:

1.

Beam Landing

2.

Convergence

3.

Focus

4.

Screen (G2) and White Balance

  Note:  Test Equipment Required

1.  Color Bar Pattern Generator
2. Degausser
3.  DC Power Supply
4.  Digital Multimeter

a

b

c

d

d

a

c

Purity control

corrects this area.

Disk magnets or

rotatable disk

magnets correct

these areas(a-d).

Deflection yoke positioning

corrects these areas.

b