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7 Screws +BVTP 4X16

Rear Cover

Sub Woofer

1

 Lift to remove Sub-woofer.

2

 Remove screws.

4 screw +BVTP 3 x 10

7 Screws +BVTP 4X16
(KV-20FS120/21FM120/21FS120 Only)
6 Screws +BVTP 4X16
(KV-24FS120/25FS120 Only)

Rear Cover

3 screw +BVTP 3 x 12
(KV-20FS120/21FS120 Only)
1 Screw +BVTP 4X16
(KV-21FM120 Only)
3 screw +BVTP 3 x 10
(KV-24FS120/25FS120 Only)

Chassis Assembly

Claw

1

  Push down on clips to release K Board, then unplug the 2 pin

  woofer connector and move out of the way.

2

  Press on catch tab to release A Board.

3

  Disconnect remaining cables to allow A Board to be removed. 

CV Board

A Board

1.  Discharge the anode of the CRT and remove the anode cap.

2.  Unplug all interconnecting leads from the defl ection yoke, neck 

assembly, degaussing coils and CRT grounding strap.

3.  Remove the CV Board from the CRT.

4.  Remove the chassis assembly.

5.  Loosen the neck assembly fi xing screw and remove.

6.  Loosen the defl ection yoke fi xing screw and remove.

7.  Place the set with the CRT face down on a cushion and remove 

the degaussing coil holders.

8.  Remove the degaussing coils.

9.  Remove the CRT grounding strap and spring tension devices.

10. Unscrew the four CRT fi xing screws [located on each CRT 

corner] and remove the CRT  [Take care not to handle the CRT 
by the neck].

Coated

Earth

Ground 

Strap

WARNING: High voltage remains in the CRT even after the power is disconnected. To avoid electric shock, discharge CRT before attempting to  
remove the anode cap.  Short between anode and coated earth ground strap of CRT. 
NOTE:  After removing the anode cap, short circuit the anode of the picture tube and the anode cap to either the metal chassis, CRT shield, or carbon 
painted on the CRT. 

1.  Do not use sharp objects which may cause damage to the surface of the anode 

cap. 

2.  To avoid damaging the anode cap, do not squeeze the rubber covering too 

hard. A material fi tting called a shatter-hook terminal is built into the rubber. 

3.  Do not force turn the foot of the rubber cover. This may cause the shatter-hook 

terminal to protrude and damage the rubber.

10

5

4

3

1

2

Turn up one side of the rubber cap in 
the direction indicated by arrow  a  .

Use your thumb to pull the rubber
cap fi rmly in the direction indicated
by arrow  b  .

When one side of the rubber cap separates from 
the anode button, the anode cap can be removed 
by turning the rubber cap and pulling it in the 
direction of arrow  c  .

8

7

9

a

b

Anode Button

c

6

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: Pro
PICTURE CONTROL: Normal
BRIGHTNESS CONTROL: Normal

Perform the adjustments in order as follows:
 1.  Beam 

Landing

 2.  Convergence
 3.  Focus
 4.  Screen 

(G2)

 5.  White 

Balance

Note Test Equipment Required:
 

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 defl ection 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 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.  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.