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– 13 –

•

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 switch 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

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

•

In order to reduce the influence of geomagnetism on the set's

picture tube, face it east or west.

•

Switch on the 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 green.

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 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.

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

magnet to adjust it. (See Figure 3-4.)

GREEN

BLUE      RED

Purity control

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

}

normal

– 14 –

•

Before starting this adjustment, adjust the focus, horizontal size,

and vertical size.

•

Minimize the brightness setting.

•

Provide dot pattern.

1. (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.

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

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

screen.

•

Operation of V.STAT magnet.

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

B

R

B

R

a

b

b

b

a

b

a

b

a

R

G

B

b

B

G

R

b

b

a

a

1

2

3

G

G

B     G     R

R     G     B

R     G     B

G

R

B

Center dot

V.STAT Magnet

C board

RV 701

SCREEN (G2)

V.STAT

Purity

•

Operation of BMC (Hexapole) magnet.

If the blue or red dot does not converge with the other two dots,

perform following steps.

Move BMC magnet (a) to correct insufficient H.static

convergence.

Rotate BMC magnet (b) to correct insufficient V.static

convergence.

In either case, repeat Beam Landing Adjustment.

a

BMC magnet

b

– 15 –

3. Move the deflection yoke as shown in the figure below and

optimize the convergence.

4. Tighten the deflection yoke screws.

5. Install the deflection yoke spacer.

•

Before starting this adjustment, adjust the horizontal static

convergence and the vertical static convergence.

1. Slightly loosen the deflection yoke screws.

2. Remove the deflection yoke spacer.

B     G     R

B

 

G

 

R

R

 

G

 

B

R     G     B

R     G     B

R

 

G

 

B

B

 

G

 

R

B     G     R

R     G     B

B     G     R

B     G     R

R     G     B

a-d : screen-corner
misconvergence

b

a

c

d

a

d

c

b

Fix a Permalloy assy
corresponding to the
misconverged areas

Permalloy assembly

– 16 –

Adjust FOCUS control on the C board (RV703) for the best focus.

Set the standby condition (Press  

POWER

  button on the

commander) and then press  

POWER

  button again, hereupon it

becomes TV mode.

1) Set to Service Mode.

2) Press  1  (UP) and 4   (DOWN) to select an item of

adjustments.

3) Press  

MUTING

  button and it will indicate WRITE on screen.

4) Press  -  button to write into memory.

1) After adjustment, pull out the plug from AC outlet, and then

plug into AC outlet again.

2) Turn the power switch ON and set to Service Mode.

3) Call the adjusted items again, confirm they were adjusted.

Note

Initial DATA

09

RDR

25

WHITE POINT R

0A

GDR

20

WHITE POINT G

0B

BDR

20

WHITE POINT B

Item
number

Adjustment
item

SERVICE

MUTING

1 F

DATA

RDR

Adjustment Item

09

Item number

WRITE

1 F

RDR

09

0

Executes the writing

1) Set the PICTURE and BRIGHTNESS to normal.

2) Put to VIDEO input mode without signals.

3) Connect R, G and B of the C board cathode to the oscilloscope.

4) Adjust G2 (RV701) volume to the value below.

1) Set to Service Mode.

2) Input an entire white signal.

3) Set the PICTURE to maximum.

4) Select RDR(09) with  1  and  4 , and then set the level to 25

with  3  and  6 .

5) Select GDR(0A) and BDR(0B) with 1 and 4 and adjust the

level with 3 and 6 for the best white balance.

6) Write into the memory by pressing  

MUTING

  , then - .

0 V

177 ± 2 V DC