Set-Up Adjustments; Beam Landing - Sony TRINITRON KV-T21MN8 Service Manual

Color tv

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Table Of Contents

Table of Contents

•

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 switch should be set as follows unless otherwise noted:

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

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

.................................................................................................................................................................................................................................

Preparation :

•

In order to reduce the influence of geomagnetism on the set's

picture tube, face it east or west.

•

Switch on the power and degauss with the degausser.

3-1. BEAM LANDING

1. Input a white signal with the pattern generator.

}

Contrast

normal

Brightness

2. Position neck assy as shown in Figure 3-1.

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 3-1 through 3-3.)

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

screen is green. (See Figure 3-1.)

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 screw.

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

magnet to adjust it.

(See Figure 3-4.)

Fig. 3-1

SECTION 3