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– 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 direc-

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) Remove the Rear Cover.
2) Unplug all interconnecting leads from the Deflection yoke, Neck assy, Degaussing Coil and CRT grounding strap,

and Remove Chassis Assy.

3) Place the TV set with the CRT face down on a cushion jig.

4

 

Anode Cap Removal

6

 

Degaussing Coil

q;

 

Loosen the Neck Assembly 

 fixing 

screw 

and 

remove

 

Neck Assy and VM board

qa

 

Loosen the Deflection Yoke

 fixing 

screw 

and 

remove

9

 

C Board Removal

7

 

Spring Tension (2) Removal

5

 

Holder, DGC (2) Removal

8

 

Earth Coating Assy Removal

qs

 

Support, CRT (2) Removal

qd

 

Screw Tapping 7 +(Crown Washer)

5

 

Band ,DGC Removal

– 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

}

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

– 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.

– 11 –

Preparation:
Before starting this adjustment, adjust the horizontal  and
the vertical static convergence

7. Y separation axis correction magnet adjustment.

1. Receive the cross-hatch signal and adjust

[PICTURE] to [MIN] and [BRIGHTNESS] to
[STANDARD]  .

2. Adjust the Y separation axis correction magnet

on the neck assembly so that the horizontal lines

at the top and bottom of the screen are straight.

Neck assy

Neck assy

Blue

Red

Blue

Red

VM1 board

VM1 board

R B

R B

TLH

TLV

YCH

XCV

B

R

R

B

(VR1)
TLV 1 (no need to adjust)

XCV

DY pocket

DY pocket

TLH Plate

XCV

(VR3)

TLV 2 (adjust)

(VR2)

YCH

If you are unable to adjust the corner convergence
properly, this can be corrected with the use Piece A(90)
Conv. Correct.

1. Affix the  Permaloy Assy Correction corresponding to the

misconverged areas.

TLV

Rotate TLV-2 VOL (29", 34") on DY

XCV

Rotate XCV

Adj core on DY

YCH

Rotate YCH

VOL on DY

TLH

Insert

TLH

Correction Plate to DY Pocket

(Left or Right)

b

a

c

d

a-d : screen-corner
        misconvergence

a

b

c

d

a to d : permaloy assembly

Fix a Permaloy assy
corresponding to the
misconverged areas