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— 17 —

Rear Cover

Eight screws
(BVTP 4x16)

— 18 —

— 19 —

Short circuit the anode of the picture tube and the anode cap to the metal chassis, CRT shield or

carbon paint on the CRT, after removing the anode.

b

b

a

Turn up one side of the rubber cap in
the direction indicated by the arrow  a

1

2    Using a thumb pull up the rubber cap

firmly in the direction indicated by the
arrow  b

3

When one side of the rubber cap is
separated from the anode button, the
anode-cap can be removed by turning
up the rubber cap and pulling it up in
the direction of the arrow   c

Don't damage the surface of anode-cap with sharp shaped material !
Don't press the rubber hardly not to hurt inside of anode-caps !
A metal fitting called as shatter-hook terminal is built into the rubber.
Don’t turn the foot of rubber over hardly !
The shatter-hook terminal will stick out or damage the rubber

.

 

 Chassis assy

 

Neck Assy

 

VM Board

 

Spring Tension

Degaussing coil

DGC Holders

 

 C Board

 

Deflection Yoke

 

 Anode cap

Four Tapping Screws

— 20 —

•

When complete readjustment is necessary or a new picture
tube is installed, carry out the following adjustments.

•

Unless there are specific instructions to the contrary, carry
out these adjustment with the rated power supply.

•

Unless there are specific instructions to the contrary, set the
controls and switches as follows.

Contrast ............ normal
Brightness ........ normal

•

Carry out the following adjustments in this order:

3-1. Beam landing
3-2. Convergence
3-3. Focus
3-4. White balance

Note:Testing equipment required.

1. Color bar/pattern generator
2. Degausser
3. Vector scope

Preparation:
1. In order to reduce the influence of geomagnetism on the  set’s

picture tube face it in an easterly or westerly direction.

2. Switch on the set’s power and degauss with the degausser.

1. Input a crosshatch signal from the pattern generator.
2. Picture control is minimum and brightness control is still

normal.

3. Position the neck assy as shown in Fig. 3-2.
4. Move the deflection yoke forward to touch the CRT and it

stands up rightly.

5. Adjust the upper pin and the lower pin symmetrically by

opening or closing the Y-splitting axis correction magnets
on the neck assy.

6. Return the deflection yoke to its original position.

Note: Before carrying out the following adjustments adjust the

magnets as indicated below (See Fig.3-3).

1. Input an all-white signal from the pattern generator.

Maximize the picture setting and adjust the brightness setting.

2. Rough-adjust the focus and horizontal convergence.
3. Loosen the deflection yoke screws, align the purity adjustment

knob to the central position. (See Fig. 3-1)

4. Switch from the all-white pattern to an all-green pattern.
5. Move the deflection yoke backwards and adjust with the

purity magnet so that the green is at the center and it aligns
symmetrically. (See Fig. 3-4)

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

screen becomes green.

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

landing condition.

8. When the position of the deflection yoke has been

determined, fasten the deflection yoke with the screw.

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

magnets to correct it. (See Fig. 3-5)

Purity Adjustment

Fig.3-1

Neck assy

Align the bottom edge of the neck
assy with the G3 hole center.

Fig.3-2

Y-splitting axis correction magnet

Align Pips
on each
magnet

Fig.3-3

Deflection yoke

Purity