DOWNLOAD Sony KV-SZ29M31 (serv.man2) Service Manual ↓ Size: 4.81 MB | Pages: 80 in PDF or view online for FREE

– 5 –

1 Twelve screws
     (+BVTP 4 × 16
       Type2 IT-3)

2 Rear cover

1 Two screws

          Tapping screw 

       (+PWH 4x16)

2 H1 Board    

1 Two Hooks     

1 A Board

– 6 –

• The picture tube is upside down for KV-SZ29M31 (South Africa) only, and the position for the anode cap and tension springs

are changed accordingly.

• Please make sure the TV set is not in standing position before removing necessary CRT support located on bottom right

and left.

1) Remove the rear cover.
2) Unplug all interconnecting leads from the Deflection yoke, Neck assy, Degaussing Coil and CRT grounding strap. Remove

Chassis Assy.

3) Place the TV set with the CRT face down on a cushion jig.

qd

 Loosen the Deflection Yoke

fixing screw and remove

qa

 Earth Coating Assy

4

 Anode Cap Removal

7 Band, DGC Removal (x1)

5 CV Board Removal

6 Loosen the Neck Assembly

fixing screw and remove VM coil

9

 Holder, DGC Removal (x2)

8

 Spring Tension Removal (x2)

qf

 Screw Tapping

     7+ Crown Washer

0

 Degaussing Coil

qs

 Supports, CRT(2) Removal

1

 Two Holders

2

 K board

– 7 –

• After removing the anode, short circuit the anode of the picture tube and the anode cap to the metal chassis, CRT shield or

carbon paint on the CRT.

•

1 Turn up one side of the rubber cap in the direction

indicated by the arrow a.

2 Using a thumb pull up the rubber cap firmly in the direction

indicated by the arrow b.

3 When one side of the rubber cap is separated from the

anode button,  the anode-cap can be removed by turning
up the rubber cap and pulling it up in the direction of the
arrow c.

•

1 Do not damage the surface of anode-caps with sharp

2 Do not press the rubber too hard so as not to damage

3 Do not turn the foot of rubber over too hard.

a

a

b

b

c

 Anode Button

– 8 –

The following adjustments should be made when a complete
realignment is required or a new picture tube is installed.

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. G2(SCREEN)
5. White Balance

Note : Test Equipment Required.

1. Pattern Generator

5. Oscilloscope

2. Degausser

6. Landing Checker

3. DC Power Supply

7. XCV Adjuster

4. Digital Multimeter

Preparation :
• Feed in the white pattern signal.
• Before starting, degauss the entire screen with the

degausser.

• In order to reduce the geomagnetism on the set's picture

tube, face it east or west.

1. Input a raster signal with the pattern generator.
2. Loose the deflection yoke(DY) mounting screw, and set

the purity control to the center as shown below:-

3. Position VM coil as shown below:-

4. Set the raster signal of the pattern generator to green.
5. Move the DY backward and adjust the purity control so

that green is in the center and blue and red are at the
sides evenly.

Red

Blue

Green

a

b

b

c

c

d

d

a

Purity control
corrects this area.

Disc magnets or rotatable
disc magnets correct these
areas (a-d).

Deflection yoke positioning
corrects these areas.

Purity control

VM coil

G2

G1

G3

Align the edge of
the VM coil with
the edge of the G3 grid.

G4

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

6. Then move the DY forward and adjust so that the entire

screen becomes green.

7. Now switch over raster signal to red then blue and

confirm the condition.

8. When the position of the DY is determined, tighten it with

the DY mounting screw.

9. If the beam does not land correctly in all the corners of

the screen, use magnet disc to correct it.