Sony KV-XF25M30 Service Manual ▷ View online
– 29 –
KV
-XF25M30/XF25M50/XF25M63
-XF25M30/XF25M50/XF25M63
KV
-XF25M65/XF25M90
-XF25M65/XF25M90
RM-954
2-6-2. REPLACEMENT OF LIGHT GUIDE
2-5. SERVICE POSITION
(Note: Remove F Bracket first.)
2-6. REPLACEMENT OF PARTS
For replacement of the Control Button and Light Guide, cut the welded portions from
them, exchange with the new parts, and fix them with screws (+BVTP) respectively.
them, exchange with the new parts, and fix them with screws (+BVTP) respectively.
2-6-1. REPLACEMENT OF CONTROL BUTTON
Control button
Two screws
(+BVTP 3
(+BVTP 3
×
12)
One screw
(+BVTP 3
(+BVTP 3
×
12)
2-7. PWB HOLDER REMOVAL (KV-XF25M65 only)
2
Two screws
(+BVTP 3
×
12)
PWB holder
– 30 –
KV
-XF25M30/XF25M50/XF25M63
-XF25M30/XF25M50/XF25M63
KV
-XF25M65/XF25M90
-XF25M65/XF25M90
RM-954
2-10. H3 BOARD REMOVAL
2-9. V1 BOARD REMOVAL (KV-XF25M65 only)
1
Two claws
2
V1 board
3
Two connectors
1
Two connectors
4
Four claws
5
H3 Board
2
Four connectors
3
B3 Board
5
A Board
3
Four connectors
1
Two screws
(+BVTAP 3
×
12)
2
Three screws
(+BVTAP 3
×
12)
2-11. A AND B3 BOARDS REMOVAL
2-8. TERMINAL BRACKET REMOVAL
1
Two screws
(+BVTP 3
×
12)
2
Two claws
3
Terminal bracket
– 31 –
KV
-XF25M30/XF25M50/XF25M63
-XF25M30/XF25M50/XF25M63
KV
-XF25M65/XF25M90
-XF25M65/XF25M90
RM-954
2-12. PICTURE TUBE REMOVAL
NOTE:
The picture tube for Australian and Indonesian models are upside-
down, and the position for the anode-cap and tension spring is
changed accordingly.
down, and the position for the anode-cap and tension spring is
changed accordingly.
•
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.
A metal fitting called the shatter-hook terminal is built into the rubber.
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.
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
can be removed by turning up the rubber cap and pulling it up in the direction of the
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
!£
Four DGC clip
!¢
DGC
band
band
!∞
Demagnetic coil
!™
Four claws
1
Two screws
(washer head)
(+P 4
(washer head)
(+P 4
×
16)
2
Speaker
(5cm)
(5cm)
!¶
Two screws
(Tapping)
(Tapping)
3
Speaker
(15
(15
×
6.5cm)
5
Speaker
(5cm)
(5cm)
6
Speaker
(15
(15
×
6.5cm)
!§
Tension
spring
spring
8
Chassis assy
!¡
Deflection
yoke
yoke
!º
Neck assy
9
C board
7
Anode cap
!•
Picture tube
Cushion
!¶
Two screws
(Tapping)
(Tapping)
!ª
Two screws
(+P 3
(+P 3
×
12)
4
@º
Two screws
(washer head)
(+P 4
(washer head)
(+P 4
×
16)
Two screws
(+P 3
(+P 3
×
12)
– 32 –
KV-XF25M30/XF25M50/XF25M63
KV-XF25M65/XF25M90
KV-XF25M65/XF25M90
RM-954
•
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. Color-bar/Pattern Generator
2. Degausser
3. Oscilloscope
SECTION 3
SET-UP ADJUSTMENTS
................................................................................................................................................................................................................................
Fig. 3-2
Neck assy
G2
G1
G3
Behind the G2 edge
Fig. 3-1
Fig. 3-5
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
Fig. 3-4
Red
Blue
Green
}
normal
Preparation :
•
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
2. Position neck assy as shown in Fig3-2.
3. Set the pattern generator raster signal to a green raster.
4. 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.
(See Figures 3-1 through 3-4.)
5. Move the deflection yoke forward and adjust so that the entire
screen is green. (See Figure 3-2.)
6. Switch the raster signal to blue, then to red and verify the
condition.
7. When the position of the deflection yoke has been decided,
fasten the deflection yoke with the screws and DY spacers.
8. If the beam does not land correctly in all the corners, use a
magnet to adjust it.
(See Figure 3-5.)
Purity control
Fig. 3-3
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