DOWNLOAD Sony KV-21FA210 (serv.man2) Service Manual ↓ Size: 7.97 MB | Pages: 100 in PDF or view online for FREE

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.

Set the controls as follows unless otherwise noted:

VIDEO MODE: Standard

PICTURE CONTROL: Normal

BRIGHTNESS CONTROL: Normal

  1. 

Beam Landing

  2. 

Convergence

  3. 

Focus

  4. 

Screen (G2)

  5. 

White Balance

  1. 

Color Bar Pattern Generator

  2. 

Degausser

  3. 

DC Power Supply

  4. 

Digital Multimeter

Before beginning adjustment procedure:
1.  Degauss the entire screen.
2.  Feed in the white pattern signal.

1.  Input a raster signal with the pattern generator.
2.  Loosen the deflection yoke mounting screw, and set the purity 

control to the center as shown below:

Purity Control

3.  Turn the raster signal of the pattern generator to green.
4.  Move the deflection yoke backward, and adjust with the purity control 

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

sides. 

���� ���

�����

5.  Move the deflection yoke forward, and adjust so that the entire 

screen becomes green. 

6.  Switch over the raster signal to red and blue and confirm the 

condition.

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

the deflection yoke mounting screw.

8.  If 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.

Before starting convergence adjustments:
1  Perform FOCUS, VLIN and VSIZE adjustments.
2.  Set BRIGHTNESS control to minimum.
3.  Feed in dot pattern.

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

center of the screen (Vertical movement adjust S V.STAT RV1750 to 

converge).

B

G

R

Center dot

V.STAT magnet

RV1750

V.STAT

B

G

R

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

close the V. STAT magnet.

  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

B G R

1

2

b

b

b

b

b

b

b

a

a

b

a

a

a

a

3

R

G

B

B

G

R

If the blue dot does not converge with the red and green dots, peform 

the following:

1.  Move BMC magnet (a) to correct insufficient H.Static convergence.
2.  Rotate BMC magnet (b) to correct insufficient V.Static convergence.
3.  After adjusting the BMC magnet, repeat Beam Landing Adjustment.

BMC MA

GNET

PURITY

V.STAT

b

BMC magnet

a

Before performing this adjustment, perform Horizontal  and Vertical 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:

B

G

R

G

B

R

G

B

R

R

R

G

B

G

B

G

B

R

B

G

R

G

B

G

B

R

R

G

B

G

G

B

R B

R

R

4.  Tighten the defl ection yoke screw.

5.  Install the defl ection yoke spacers.

1.  Input crosshatch pattern.

2.  Adjust PICTURE QUALITY to standard, PICTURE and BRIGHTNESS 

to 50%, and OTHER to standard.

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

TLH plate on the defl ection yoke.

(TLV)

YCH

XCV

TLV

CV
Board

RV1750

 V.STAT

TLH Plate

  B R      R B
(R)(B)  (B)(R)

TLH+
TLH-

4.  Adjust XCV core to balance X axis.

5.  Adjust YCH VR to balance Y axis.

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

 

Note: Perform adjustment 3-6 while tracking items 1 and 2.

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

b

a

c

d

a

b

d

a-d: screen-corner

misconvergence

c

1.  Adjust FOCUS control for best pictures.

Focus (FV)

Screen (G2)

1.  Input a dot pattern.

2.  Set the PICTURE and BRIGHTNESS controls at minimum and 

COLOR control at normal.

3.  Adjust SBRT, GCUT, BCUT in service mode with an oscilloscope as 

shown below so that voltages on the red, green, and blue cathodes 
are 160 ± 2VDC.

Pedestal

160 – 2VDC

Ground

±

4.  Observe the screen and adjust SCREEN (G2) VR in FBT to obtain 

the faintly visible background of dot signal. 

1.  Standby mode (power off).

2. Press Display  

 Channel  5  

 Sound Volume  +  

 Power 

on the Remote Commander (press each button within a second).

1.  The CRT displays the time being adjusted.

Mode

Category

Display

Item

Display

Item

Signal
Type

ntsc

service

defl

vchp

00000000

00000000

hsiz

16

2. Press 1  or  4  on the Remote Commander to select the time.

3. Press 3  or  6  on the Remote Commander to change the data.

4. Press MUTING  then  ENTER  to save into the memory.

Turn the set off then on to exit Service Adjustment Mode.

service     defl     hsiz

16

ntsc

vchp     00000000    00000000

Category

Display 

Item

Mode

Item 
Data

Signal
Type

write

ENTER

Green

Red

MUTING

1.  Input an entire white signal with burst.

2.  Set to Service Adjustment Mode.

3.  Set the PICTURE and BRIGHTNESS to minimum.

4.  Adjust with SBRT if necessary.

5.  Select GCUT and BCUT with  1  and  4  .

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

7.  Set the PICTURE and BRIGHTNESS to maximum.

8.  Select GDRV and BDRV with  1  and   4 .

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

10. To write into memory, press  MUTING  then  ENTER .