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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.

The controls and switch should be set as follows unless otherwise 
noted:

PICTURE CONTROL: normal
BRIGHTNESS CONTROL: normal

Perform the adjustments in order as follows:
 1.  Beam 

Landing

 2.  Convergence
 3.  Focus
 

4. 

Screen (G2)/White Balance

Test Equipment Required:
 

1. 

Color Bar Pattern Generator

 2.  Degausser
 

3. 

DC Power Supply

 4.  Digital 

Multimeter

 5.  Oscilloscope
 6.  CRT 

Analyzer

Preparation:
•  Input a white pattern signal.

•  Face the picture tube in an East or West direction to reduce the 

infl uence of geomagnetism.

1.  Input white pattern from pattern generator.

2.  Loosen the defl ection yoke mounting screw, and set  the purity control 

to the center as shown below:

Purity Control

3.  Input green pattern from pattern generator.

4.  Move the defl ection yoke backward, and adjust with the purity control 

so that green is in the center and red and blue are even on both sides. 

Blue

Red

Green

5.  Move the defl ection yoke forward, and adjust so that the entire screen 

becomes green. 

6.  Switch over the raster signal to red and blue and confi rm the 

condition.

7.  When the position of the defl ection yoke is determined, tighten it with 

the defl ection yoke mounting screw.

8.  When landing at the corner is not right, adjust by using the disk 

magnets. 

a

c

b

d

b

a

c

d

Purity control

corrects this area

Disk magnets

or rotatable disk
magnets correct

these areas (a-d)

Deflection yoke positioning

corrects these areas

Preparation:
•  Perform FOCUS, V. LIN and V. SIZE adjustments.

•  Set BRIGHTNESS control to minimum.

•  Input dot pattern.

B

G

R

Center dot

V.STAT magnet

RV701 V.STAT

R   G   B

1.  Adjust V. STAT magnet to converge red, green and blue dots in the 

center of the screen (Vertical movement).

 

Tilt the V. STAT magnet and adjust static convergence to open or 
close the V. STAT magnet.

2.  When the V. STAT magnet is moved in the direction of arrow a and b, 

red, green, and blue dots move as shown below:

B

R

G

B

R

G

R

G

B

G

R

B

G

B

R

B

G

R

1

2

3

a

b

a

b

b

b

a

a

b

b

a

b

a

b

The respective dot positions resulting from moving each magnet interact, 
so perform adjustment while tracking.

1.  Use the V.STAT tabs to adjust the red, green, and blue dots so they 

line up at the center of the screen (move the dots in a horizontal 
direction).

R G

B

R

G

B

R

G B

R

G

B

R

G

B

R

G

B

1.  Input cross-hatch pattern, adjust PICTURE to minimum and 

BRIGHTNESS to normal.

2.  Adjust the defl ection yoke upright so it touches the CRT.

3.  Adjust so that the Y separation axis correction magnet on the neck 

assembly is symmetrical from top to bottom (open state).

BMC MA

GNET

PURITY

V.STAT

4.  Return the defl ection yoke to its original position.

Before starting, perform Vertical and Horizontal Static Convergence 
Adjustment.

1.  Slightly loosen defl ection yoke screw.

2.  Remove defl ection yoke spacers.

3.  Move the defl ection yoke for best convergence as shown below:

R G B

B G R

R
G

B

R

G

B

B G R R G B

R G B

R

R

R

G

B

G

B

G

B

R G B

B G R

4.  Tighten the defl ection yoke screw.

5.  Install the defl ection yoke spacers.

Preparation:
•  Input crosshatch pattern.

•  Adjust Picture Quality to standard, Picture and Brightness to 50%, and 

Other to standard.

•  Adjust the Horizontal Convergence of red and blue dots by tilting the 

TLH plate on the defl ection yoke.

XCV

V Board

RV701

V.STAT

Y Magnet

TLH Plate

H-TRP

YCH

TLV

C Board

TLH+
TLH-

  B R
(R)(B)

  R B
(B)(R)

1.  Adjust XCV core to balance X axis.

2.  Adjust YCH VR to balance Y axis.

3.  Adjust vertical red and blue convergence with V.TILT (TLV VR.) 

Perform adjustments while tracking items 1 and 2.

4.  Adjust Y MAGNET to correct V.BOW Geometry Distortion.

5.  Adjust H-TRP to correct H.Trapezoid Geometry Distortion.

After adjusting items 4 and 5, confi rm overall geometry again.

1.  Affi x a permalloy assembly corresponding to the misconverged areas: 

b

a

c

d

a

b

a-d: screen-corner

misconvergence

c

d

1.  Input monoscope signal.

2.  Set user controls to normal.

3.  Set video mode to STANDARD.

4.  Set the PICTURE to maximum.

5.  Adjust at 325 Mark for best center/corner focus balance.

6.  Receive an entire white signal.  Make sure Magenta Ring is at an 

acceptable level.

Focus

Screen (G2)

35

325

35 MARK

325 MARK

CENTER

CIRCLE

1.   Input dot pattern from the pattern generator.

2.   Set the user controls to NORMAL.

3.  Attach the G2-Jig to the C Board.

4.  Adjust RCUT, GCUT, BCUT, and SBRT in service mode with an 

oscilloscope so that voltages on the red, green, and blue cathodes are 
170 ± 4.0Vdc. 

5.  Observe the screen and adjust SCREEN (G2) VR  to obtain the faintly 

visible background of dot signal.

6.  Push the TEST + JUMP (+ Channel) to cut off the signal.  The screen 

should be bright or dark.  Brightness of raster must be increased when 
adjusting.

7.  Adjust screen VR until the screen is slightly cut off, or scarcely lights 

up.  A signal cannot be seen when the brightness of the raster is high.

8.  Push the JUMP again to release the cut off.

pedestal

GND

170Vdc

 170 + 4.0 Vdc

VID_ADJ

0

RDRV

Red Drive

41

VID_ADJ

1

GDRV Green Drive

32

VID_ADJ

2

BDRV

Blue Drive

29

VID_ADJ

3

RCUT

Red Cut-off

31

VID_ADJ

4

GCUT Green Cut-off

14

VID_ADJ

5

BCUT

Blue Cut-off

17

VP2

4

SBRT

Sub Bright

16

1.  Set program palette to STANDARD and push RESET.

2.  Input an entire white signal.

3.  Set to Service Adjustment Mode.

4.  Set the PICTURE and BRIGHT to minimum.

5.  Adjust with SBRT if necessary.

6.  Set RCUT to “14”.

7.  Select GCUT and BCUT with  3  and  5  .

8.  Adjust by pressing  1  and  4  for the best white balance.

9.  Set the PICTURE and BRIGHT to maximum.

10. Select GDRV and BDRV with  and  .

11. Adjust with 3 and 6 for the best white balance.

12. Write into the memory by pressing  3  then  5 .

13. Repeat steps 1-12 for GDR4, BDR4, GCU4 and BCU4 using Video 4 

input. 

*  Use values from Sub Contrast Adjustments