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– 33 –

• 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. Pattern Generator

2. Degausser

3. Oscilloscope

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

normal

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 3-4.)

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.)

}

Purity control

Red

Blue

Green

Purity control
corrects this area.

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

Deflection yoke positioning
corrects these areas.

a

b

b

c

c

d

d

a

– 34 –

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

and vertical size.

• Receive dot/hatch signal.
• Pic mode: Personal (Pic 90%, Brightness 50%, Col 50 %,

Hue 50%, Shp 50%).

1. (Moving horizontally), adjust the H.STAT control so that the

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

2. (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.

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.)

1

V. STAT

2

H. STAT VR

3

Center dot

R    G    B

R

G

B

H. STAT VR

V. STAT

Magnet

RV702

H. STAT

C1 Board

BMC (Hexapole)

V.STAT

DY pocket

Purity

V.STAT

BMC

Purity

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

– 35 –

YCH

Rotate

YCH

VOL on DY

TLV

Insert

TLH

Correction Plate to DY Pocket (Left or

Right)

ON DY:

b

a

c

d

a-d : screen-corner
        misconvergence

YCH

TLV

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

convergence and the vertical static convergence

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.

R G

B

R

G

B

R

G B

R

B

R

G

G

G

B

R

B

R B

TLV

YCH

B

R

– 36 –

2. WHITE BALANCE ADJUSTMENT
1) Set to Service Mode (Refer Section 5-1: 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].

3. SUB BRIGHT ADJUSTMENT
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. G2 (SCREEN) ADJUSTMENT
1) Set the PICTURE to normal.
2) Put to VIDEO input mode without signals.
3) Connect R, G and B of the C1 board cathode to the

oscilloscope.

4) Adjust BRIGHTNESS to obtain the cathode voltage to the

value below.

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

before cut off.

White

second from the right

Black

0 V

Cathode setting voltage:

175 V 

± 2 (VDC)

Fix a Permalloy assy corresponding to the misconverged
areas.

FOCUS adjustment should be completed before W/B adjustment.

1.

Receive digital monoscope pattern.

2.

Set "Picture Mode" to "DYNAMIC".

3. Adjust focus VR so that the center of screen becomes just

focus.

4. Change the receiving signal to white pattern and blue back.

5. Confirm magenta ring is not noticeable. Incase magenta is very

obvious, adjust focus VR to take balance of magenta ring and

focus.

a

b

c

d

Permalloy assembly

Screen

Focus