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– 21 –

• 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

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

}

normal

Purity control

Red

Blue

Green

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. Set the pattern generator raster signal to a green raster.

3. 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.)

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

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

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

condition.

6. When the position of the deflection yoke has been decided,

fasten the deflection yoke with the screws and DY spacers.

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

magnet to adjust it.

(See Figure 3-4.)

Deflection yoke positioning

corrects these areas.

Purity control corrects

this area.

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

b  

c

a

d

b

a

c

d

– 22 –

Preparation :
• Before starting this adjustment, adjust the focus, horizontal size

and vertical size.

• Minimize the brightness setting.
• Provide dot pattern.

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

and blue dots are on top of each other at the center of the screen.

R     G     B

G

R

B

Center dot

C3 board

RV 702

V.STAT Magnet

H. STAT VR

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.

1

V. STAT

2

H. STAT VR

BMC (Hexapole)

V.STAT

Purity

V.STAT

BMC

Purity

R G

B

R

G

B

R

G B

R

B

R

G

G

G

B

R

B

R

R

R

R

G

G

G

G

B

B

B

B

a

a

a

b

b

b

b

R

R

G

G

B

B

a

a

b

b

b

3

– 23 –

b

a

c

d

a-d : screen-corner
        misconvergence

a

d

c

b

a to d : Permalloy assembly

Fix a Permalloy assy
corresponding to the
misconverged areas

Preparation:
• Before starting this adjustment, adjust the horizontal static

convergence and the vertical static convergence

R B

TLV

YCH

B

R

on DY

YCH

TLV

– 24 –

Adjust FOCUS control on the flyback transformer for the best

focus.

1) Set to Service Mode (Refer Section 4-1: ADJUSTMENTS

WITH COMMANDER).

2) Input white raster signal.

3) Set the PICTURE to minimum.

4) Select GCT (WHB 4) and BCT (WHB 5) with 

[1]

 and 

[4]

, and

adjust the level with 

[3]

 and 

[6]

 for the best white balance.

5) Set the PICTURE to maximum.

6) Select GDR (WHB 1) and BDR (WHB 2) with 

[1]

 and 

[4]

, and

adjust the level with 

[3]

 and 

[6]

 for the best white balance.

7) Write into the memory by pressing 

[MUTING]

 then 

[0]

.

1) Set to service mode.

2) Input a staircase signal of black to white from the pattern

generator.

3) BRIGHTNESS .... 50%.

PICTURE ............ MINIMUM

4) Select SBR (WHB7) with 

[1]

 and 

[4]

, and adjust SBR (WHB7)

level with 

[3]

 and 

[6]

 so that the second stripe from the right is

dimly lit.

1) Set the PICTURE to normal.

2) Put to VIDEO input mode without signals.

3) Connect R, G and B of the C3 board cathode to the oscillo-

scope.

4) Adjust BRIGHTNESS to obtain the cathode voltage to the value

below.

5) Adjust G2 (Screen) on FBT until picture shows the point

before cut-off.

White

second from the right

Black

0 V

165 V ±2(VDC)

FOCUS

SCREEN