Sony KV-XA21M50 Service Manual ▷ View online
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25
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KV
-XA21M80/XA21M83/XA21M50/
-XA21M80/XA21M83/XA21M50/
KV
-XA21M61/XA21M60
-XA21M61/XA21M60
RM-952
2-5. J2 BOARD AND TERMINAL
BRACKET REMOVAL
2 Terminal bracket
3 J2 Board
(KV-XA21M83 only)
(KV-XA21M83 only)
One screw
(+BVTP 4x16)
(+BVTP 4x16)
1
2-6. SERVICE POSITION
SECTION 2
DISASSEMBLY
2-1. REAR COVER REMOVAL
2-2. SPEAKER REMOVAL
2-3. CHASSIS ASSY REMOVAL
2-4. F BRACKET REMOVAL
Note:
1. Disconnect the speaker connection on the right side.
2. Undress necessary wires that creates tension while
2. Undress necessary wires that creates tension while
placing the chassis into Service Position.
1 Two screws
(+BVTP 4
(+BVTP 4
× 16)
2 Six screws
(+BVTP 4
(+BVTP 4
× 16)
3 Rear Cover
2 Two screws washer head
(+P4 x16)
(+P4 x16)
3 F Board bracket
5 Two claws
1 Three connectors
4 F board
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26
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KV
-XA21M80/XA21M83/XA21M50/
-XA21M80/XA21M83/XA21M50/
KV
-XA21M61/ XA21M60
-XA21M61/ XA21M60
RM-952
2-7. REPLACEMENT OF PARTS
For replacement of light guide,unscrew
them, exchange with new parts and fix
them with screws respectively.
them, exchange with new parts and fix
them with screws respectively.
2-7-2. Replacement of Power Button
2-7-1. Replacement of Light Guide
1 Push the claw to direction
of arrow and remove
of arrow and remove
2 Spring compression
3 Power Button
One screw
(+BVTP 3
(+BVTP 3
× 12)
2-8. PICTURE TUBE REMOVAL
Note:
Note:
•
The oicture tube for Austarlia model is upside down, and the position for the anode-
cap and the tension spring are changed accordingly.
cap and the tension spring are changed accordingly.
•
Please remove necessary CRT support located on top left, top right, prior to removing
the CRT.
the CRT.
@º
@º
!¶ Demagnetic coil
4 Two screws
(washer head)
(+P 4
(+P 4
× 16)
!º Two screws
(Tapping 7+
Crown Washer)
Crown Washer)
3 Speaker
(13
× 7cm)
7 Speaker
(15
× 6.5cm)
!£ Tension
spring
!¡ Chassis assy
!¢ Deflection
yoke
!™ C1 board
!ª Anode cap
Coating earth assy
!∞ Picture tube
!¢ Cushion
9Two screws
(Tapping 7+
Crown Washer)
Crown Washer)
8 Two screws
(washer head)
(+P 4
(+P 4
× 16)
@ª Holder DGC
Cuchion (50x550) DGC
Cushion (50x550) DGC
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27
–
KV
-XA21M80/XA21M83/XA21M50/
-XA21M80/XA21M83/XA21M50/
KV
-XA21M61/XA21M60
-XA21M61/XA21M60
RM-952
•REMOVAL OF ANODE-CAP
NOTE : 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.
CRT.
•REMOVING PROCEDURES
1 Do not damage the surface of anode-caps with sharp shaped objects.
2 Do not press the rubber too hard so as not to damage the inside of anode-cap.
2 Do not press the rubber too hard so as not to damage the inside of anode-cap.
A metal fitting called the shatter-hook terminal is built into the rubber.
3 Do not turn the foot of rubber over too hard.
The shatter-hook terminal will stick out or damage the rubber.
• HOW TO HANDLE AN ANODE-CAP
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
arrow
c.
2 Using a thumb pull up the rubber cap firmly in the direction indicated by the arrow b.
1 Turn up one side of the rubber cap in the direction indicated by the arrow a.
a
a
b
b
c
Anode Button
– 28 –
KV-XA21M80/XA21M83/XA21M50/
KV-XA21M61/ XA21M60
RM-952
• 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 switches 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. Pattern Generator
2. Degausser
3. Oscilloscope
SECTION 3
SET-UP ADJUSTMENTS
................................................................................................................................................................................................................................
normal
Preparation :
• In order to reduce the influence of geomagnetism on the set's
• In order to reduce the influence of geomagnetism on the set's
picture tube, face it east or west.
• Switch on the set's power and degauss with the degausser.
3-1. BEAM LANDING
1. Input a white signal with the pattern generator.
Contrast
Brightness
Brightness
2. Set the pattern generator raster signal to a green raster.
3. Move the deflection yoke to the rear and adjust with the
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.
and the red take up equally sized areas on each side.
(See Figures 4-1 through 4-4.)
4. Move the deflection yoke forward and adjust so that the
entire screen is green. (See Figure 4-1.)
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 and DY spacers.
7. If the beam does not land correctly in all the corners, use a
magnet to adjust it.
(See Figure 4-4.)
}
Fig. 4-1
Fig. 4-4
Fig. 4-3
Fig. 4-2
Purity control
Red
Blue
Green
Purity control
corrects this area.
corrects this area.
Disk magnets or rotatable
disk magnets correct these
areas (a-d).
disk magnets correct these
areas (a-d).
Deflection yoke positioning
corrects these areas.
corrects these areas.
a
b
b
c
c
d
d
a
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