KV-DA292M86 - Sony TV Service Manual (repair manual). Page 18

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• 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.

Controls and switches should be set as follows unless
otherwise noted:
PICTURE control ..................................................  normal
BRIGHTNESS control ..........................................  normal

Perform the adjustments in the following order :

1. Beam Landing
2. Convergence
3. Focus
4. White Balance
Note :  Test Equipment Required.

1. Color-bar/Pattern Generator
2. Degausser
3. Oscilloscope

Preparation :
• In order to reduce the influence of geomagnetism on the

set's picture tube, face it east or west.

• Switch on the set's power and degauss with the

degausser.

1. Input a white signal with the pattern generator.

Pic mode : Dynamic

2. Position neck assy as shown in Fig 6-1.
3. Set the pattern generator raster signal to a green raster.
4. Move the deflection yoke to the rear and adjust with the

purity control so that the green is at the center and the
blue and the red take up equally sized areas on each
side.
(See Figures 6-1 through 6-3.)

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

entire screen is green. (See Figure 6-2.)

6. Switch the raster signal to blue, then to red and verify the

condition.

7. When the position of the deflection yoke has been

decided, fasten the deflection yoke with the screws and
DY spacers.

8. If the beam does not land correctly in all the corners, use

a magnet to adjust it.
(See Figure 6-4.)

Neck assy

G2

G1

G3

Align the edge of
the neck assy with
the edge of the G2 grid.

Red

Blue

Green

Purity control
corrects this area.

Disk magnets or rotatable
disk magnets correct these
areas (a-d).

Deflection yoke positioning
corrects these areas.

a

b

b

c

c

d

d

a