DOWNLOAD Sony KV-SW252M50 (serv.man2) Service Manual ↓ Size: 8.72 MB | Pages: 80 in PDF or view online for FREE

Model
KV-SW252M50 (serv.man2)
Pages
80
Size
8.72 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-sw252m50-sm2.pdf
Date

Sony KV-SW252M50 (serv.man2) Service Manual ▷ View online

– 7 –
KV-SW252M50/M60K/M61/M81/N60
RM-GA002
5 Five screws
    (3 
× 12)(+) BVTAP
3 Four hooks
2 A Board
1-13. H4 and H7 BOARDS REMOVAL
 ( KV-SW252M60K)
2 Five Hooks     
5 Four Hooks     
4 H4 Board
H7 Board
    
3 One screws
     (+BVTAP 3 
× 12)
1-14. A BOARD REMOVAL
(Except KV-SW252M60K)
1-15. A BOARD REMOVAL  (KV-SW252M60K)
1 Five screws
     (+BVTAP 3 
× 12)
4 One screws (Washer head)
     (+BVTP 3 
× 12)
3 Four Hooks
2 A Board
1-16. B and K2 BOARDS REMOVAL
(KV-SW252M60K)
2 B Board
3 K2 Board
4 Two hooks
5 Two hooks
1 Three screws
     (+BVTAP 3 
× 12)
– 8 –
KV-SW252M50/M60K/M61/M81/N60
RM-GA002
1-17. PICTURE TUBE REMOVAL (Except KV-SW252M60K)
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.
Remove Chassis Assy.
3) Place the TV set with the CRT face down on a cushion jig.
4
 Anode Cap Removal
6
 Degaussing Coil
0
 Loosen the Neck Assembly 
fixing screw and remove
Neck Assy & VM board
qa
 Loosen the Deflection Yoke
fixing screw and remove it
9
 C Board Removal
7
 Spring Tension(2x) 
Removal
5
 Holder, DGC
Removal (2x)
8
 Earth Coating Assy
qs
 Screw Tapping 7+ Crown Washer (4x)
1-18. PICTURE TUBE REMOVAL (KV-SW252M60K)
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.
Remove Chassis Assy.
3) Place the TV set with the CRT face down on a cushion jig.
8
 Earth Coating Assy
4 Anode Cap Removal
9 C Board Removal
5
 Holder, DGC(2x) Removal
7
 Spring Tension(2x) Removal
qs
 Screw Tapping 7+ Crown Washer (4x) 
6
 Degaussing Coil  
0 Loosen the Neck Assembly
  fixing screw and remove Neck 
  Assy & VM Board
qa
 Loosen the Deflection Yoke
  fixing screw and remove it 
– 9 –
KV-SW252M50/M60K/M61/M81/N60
RM-GA002
• 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.
a
a
c
 Anode Button
b
b
– 10 –
KV-SW252M50/M60K/M61/M81/N60
RM-GA002
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
SECTION 2
SET-UP ADJUSTMENTS
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.
2-1. BEAM LANDING ADJUSTMENT
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 Neck Assy 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
Neck assy
G2
G1
G3
Align the edge of
the neck assy with
the edge of the G2 grid.
......................................................................................................................................................................................................................
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.
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