DOWNLOAD Sony KV-SR25M53K Service Manual ↓ Size: 7.79 MB | Pages: 81 in PDF or view online for FREE

Model
KV-SR25M53K
Pages
81
Size
7.79 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-sr25m53k.pdf
Date

Sony KV-SR25M53K Service Manual ▷ View online

– 6 –
KV-SR25M53K
RM-W109
2 Four screws
     (+BVTP 3 
× 12 
     Type2 IT-3)
4 One screw
    (+BVTP 3 
× 12
     Type2 IT-3)
3 One screw
    (+BVTP 3 
× 12 Type2 IT-3)
1 One screw
     (+BVTP 4 
× 16 Type2 IT-3)
5 Two hooks
6 Terminal
     bracket
SECTION 1
DISASSEMBLY
1-2.
REAR COVER REMOVAL
1-3.
SPEAKER REMOVAL
1-4.
CHASSIS ASSY REMOVAL
1-5.
SERVICE POSITION
1-1.
3D SPEAKER REMOVAL
1  Nine screws (+BVTP 4 
× 16) Type2 IT-3
2 Rear cover
1 Two screws
     (+BVTP 4 
× 16
       Type2 IT-3)
2 Two screws
     (Washer Head) 
     (+P4x16)
1-6.
TERMINAL BRACKET REMOVAL
3D Speaker box assy
2 Rear cover
– 7 –
KV-SR25M53K
RM-W109
1-8.
F BOARD REMOVAL
1-7.
J3 BOARD REMOVAL
1-9.
K AND BC BOARDS REMOVAL
1-10. H4 AND H5 BOARDS REMOVAL
1-11. A AND B BOARDS REMOVAL
1 J3 Board
3 Four screws
     (+BVTP 3 
× 12 Type2 IT-3)
2 One screw
     (+BVTP 4 
× 16 Type2 IT-3)
1 F Board
2 Two clips
3 One screw     
     (+BVTP 3 
× 12 Type2 IT-3)
2 BC Board
4 Two clips
1 K Board
3 Two clips
3 Four hooks
1 Five hooks
2 H5  Board
4 H4 Board
5 Two screws
     (Washer Head) 
     (3 
× 12)(+)(BVTAP)
2 Four screws
    (3 
× 12)(+) BVTAP
3 Two hooks
1 Five 
     connectors
6 Four hooks
4 A Board
7 B  Board
– 8 –
KV-SR25M53K
RM-W109
• 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.
• REMOVING PROCEDURES
Turn up one side of the rubber cap in the direction
indicated by the arrow 
a.
Using a thumb pull up the rubber cap firmly in the direc-
tion indicated by the arrow 
b.
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.
• HOW TO HANDLE AN ANODE-CAP
Do not damage the surface of anode-caps with
sharp shaped objects.
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.
Do not turn the foot of rubber over too hard.
The shatter-hook terminal will stick out or damage
the rubber.
anode button
1-12. PICTURE TUBE  REMOVAL
Note:
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.
3) Place the TV set with the CRT face down on a cushion jig.
A
A
B
B
C
4
 Anode Cap Removal
9
 Earth Coating Assy(2) Removal
qa
 Loosen the Neck Assembly 
fixing screw and remove
Neck Assy and VM board
qs
 Loosen the Deflection Yoke
fixing screw and remove
0
 C Board Removal
8
 Spring Tension 
 Removal (x2)
5
 Holder, DGC
 Removal (x2)
7
 Degaussing Coil
qf
 Screw (5) Tapping
– 9 –
KV-SR25M53K
RM-W109
The following adjustments should be made when a
complete realignment is required or a new picture tube is
installed.
Set the controls as follows unless otherwise noted:
VIDEO MODE: .................................................... Standard
PICTURE CONTROL: ......................................... Normal
BRIGHTNESS CONTROL: ................................. Normal
Perform the adjustments in the following order :
1. Beam Landing
2. Convergence
3. Focus
4. Screen(G2)
5. White Balance
Note : Test Equipment Required.
1. Pattern Generator
2. Degausser
3. DC Power Supply
4. Digital Multimeter
5. Oscilloscope
SECTION 2
SET-UP ADJUSTMENTS
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.
2-1. BEAM LANDING
PICTURE MODE: DYNAMIC
1. Input a white signal with the pattern generator.
Contrast
Brightness
2. Position neck assy as shown in Fig 2-1.
3. Set the pattern generator raster signal to a green
raster.
4. Move the deflection yoke to the rear and adjust with
purity control so that the green is at the center and the
blue and the red take up equally sized areas on each
side. (Figures 2-2 through 2-4.)
5. Move the deflection yoke forward and adjust so that the
entire screen is green. (Figure 2-2.)
6. Switch the raster signal to blue, then to red and verify
the condition.
7. When the position of the deflection yoke have 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.
(Figure 2-5.)
Fig. 2-1
Fig. 2-2
Fig. 2-4
Fig. 2-3
Red
Blue
Green
a
b
b
c
c
d
d
a
Purity control
corrects this area.
Disk magnets or rotatable
disk magnets correct these
areas (a-d).
Deflection yoke positioning
corrects these areas.
Purity control
normal
}
......................................................................................................................................................................................................................
Fig. 2-5
Neck assy
G2
G1
G3
Align the edge of
the neck assy with
the start of the G3 grid.
Page of 81
Display

Click on the first or last page to see other KV-SR25M53K service manuals if exist.