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– 7 –

1 Four Hooks

2 D3 Board

2 H1 Board    

1 Five Hooks     

5 Three Hooks     

4 Cover, H

3 H2 Board

1 Four screws
     (+BVTAP 3 

× 12)

2 Four Hooks

3 A Board

4 Two screws
     (washer head)
     (+P 3 

× 12)

– 8 –

• After removing the anode, short circuit the anode of the picture tube and the anode cap to the metal chassis, CRT

shield or carbon paint on the CRT.

• REMOVING PROCEDURES

1 Turn up one side of the rubber cap in the direction

a.

2 Using a thumb pull up the rubber cap firmly in the

b.

3 When one side of the rubber cap is separated from the

c.

• HOW TO HANDLE AN ANODE-CAP

1 Do not damage the surface of anode-caps with

2 Do not press the rubber too hard so as not to

3 Do not turn the foot of rubber over too hard.

a

a

b

b

c

anode button

•

Please make sure the TV set is not in standing position before removing necessary CRT support located on bottom
right and left.

1) Place the TV set with the CRT face down on a cushion jig
2) Remove the rear cover.
3) Unplug all interconnecting leads from the Deflection yoke, Neck assy, Degaussing Coil and CRT grounding strap.

6

 Earth Coating Assy

5 Band, DGC Removal

8 C Board Removal

9 Chassis Assy Removal

0 VM1 Board Removal

qd

 Holder, DGC(2) Removal

qs

 Spring Tension(2) Removal

qg

 Screw Tapping 7 +

     Crown Washer (4)

qf

 DGC(2) Removal

7 Loosen the Neck Assembly

fixing screw and removal

qa

 Loosen the Deflection Yoke

fixing screw and remove

qh

 Anode Cap Removal

4 Block Center

qj

 Support, CRT Removal (x2)

– 9 –

The following adjustments should be made when a
complete realignment is required or a new picture tube is
installed.

Set the controls as follows unless otherwise noted:
VIDEO MODE: .................................................... Standard
PICTURE CONTROL: ......................................... Normal
BRIGHTNESS CONTROL: ................................. Normal

Perform the adjustments in the following order :

1. Beam Landing
2. Convergence
3. Focus
4. Screen(G2)
5. White Balance

Note : Test Equipment Required.

1. Pattern Generator
2. Degausser
3. DC Power Supply
4. Digital Multimeter
5. 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.

Contrast
Brightness

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

purity control so that the green is at the center and the
blue and the red take up equally sized areas on each
side. (Figures 2-2 through 2-4.)

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

entire screen is green. (Figure 2-2.)

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

condition.

7. When the position of the deflection yoke have 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.
(Figure 2-5.)

Red

Blue

Green

a

b

b

c

c

d

d

a

Purity control
corrects this area.

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

Deflection yoke positioning
corrects these areas.

Purity control

Neck assy

G2

G1

G3

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

normal

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– 10 –

•

Before starting this adjustment, adjust the focus,
horizontal size and vertical size.

•

Receive dot/hatch signal

•

Pic mode: Soft

1. (Moving vertically), adjust the V.STAT magnet so that the

red, green and blue dots are on top of each other at the
centre of the screen.

2. (Moving horizontally), adjust the H.STAT VR control so

that the red, green and blue dots are on top of each
other at the center of the screen.

3. If the H.STAT variable resistor cannot bring the red,

green and blue dots together at the center of the screen,
adjust the horizontal convergence with the H.STAT
variable resistor and the V.STAT magnet in the manner
given below.
(In this case,the H.STAT variable resistor and the V.STAT
magnet influence each other so be sure to perform
adjustments while tracking).

4. BMC (Hexapole) Magnet.

If the red, green and blue dots are not balanced or aligned,
then use the BMC magnet to adjust in the manner
described below.

H. STAT VR

V. STAT
Magnet

RV750
H. STAT

RV1800
SCREEN (G2)

C Board

Center dot

R     G     B

G

R

B

a

a

b

b

b

R

R

G

G

B

B

a

b

R

R

G

G

B

B

1

V. STAT

2

H. STAT VR

R

R

G

G

B

B

a

a

b

b

b

R

R

G

G

B

B

a

b

R G

B

R

G

B

R

G B

R

B

R

G

G

G

B

R

B

3

H. STAT

R

R

G

G

B

B

a

a

b

b

b

Purity

BMC

BMC (Hexapole)

Purity

DY pocket

V.STAT

V.STAT

4

BMC (Hexapole) Magnet

5. Operation of V.STAT magnet

If the V.STAT magnet is moved in the "a" and "b" arrows,
the red, green and blue dots moves as shown below.

6. Moved RV705 H.STAT.

the red, green an blue dots move as shown below.