DOWNLOAD Sony KV-SZ252M50 Service Manual ↓ Size: 9.04 MB | Pages: 71 in PDF or view online for FREE

Model
KV-SZ252M50
Pages
71
Size
9.04 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-sz252m50.pdf
Date

Sony KV-SZ252M50 Service Manual ▷ View online

– 12 –
KV-SZ252M50/M58/M80/M88
RM-GA002
2-17.  Dress Lead Assy, Speaker to Rotation Coil using Purse Lock 
Ø
 9
2-18.  Dressing of PF Board Conn Assy  
 
(for models with PF board only)
2-19.  Cap Assy, High Voltage Installation
Dress Lead Assy, Speaker to center position of Rotation Coil using purse lock Ø 9 as shown. Make sure Earth 
Assy, Coating wire is above Lead Assy, Speaker. This is to keep Lead Assy, Speaker away from Deflection Yoke.
TVSR Requirement: 
1. Keep HV cable away from conductive parts
 (distance of 1mm/kV).
2. Keep spacing between edge of anode cap 
& conductive parts (distance of 0.5mm/kV).
3. Keep spacing between edge of anode cap & 
non-conductive parts (distance of at least 5mm or more).
Keep distance of 
0.5mm/kV
Keep distance of 
1mm/kV
90º
>5mm
Earth Assy, Coating
wire
Dress Lead Assy, Speaker to
center position of Rotation Coil
using purse lock Ø 9
DGC Connector is below Conn Assy,
3P VH to keep Conn Assy, 3P VH
away from Heatsink A007 and D604
Keep wires away from 
heatsinks A007, D604 and 
conductive parts
Apply to all SZ252 Narrow 220V CISPR models ONLY
Clamp the ferrite core at the end of the DGC
wire as shown. Position it directly above DGC 
Connector's housing
Purse lock Ø 9
Rotation Coil
Lead Assy, Speaker
(RED+BLK)
Earth Assy, Coating wire is
above Lead Assy, Speaker
Rotation coil
DGC Connector
A007
D604
DGC Band
HV Cap
Rotation coil
DGC
CN605
CN6620
Housing
Connector Assy,
3P VH
DY
Rotation Coil
Attach purse lock Ø 9
here
Lead Assy,
Speaker
Lead Assy,
Speaker
Lead Assy, Speaker
goes behind DGC
Dress Lead Assy, Speaker
directly on to DGC using
purse lock Ø 9
Pull wire to left
Lead Assy, Speaker
goes behind DGC
Pull wire to 
the right
Loop Lead Assy, Speaker and  
dress directly on to DGC using  
purse lock 
Ø 9
– 13 –
KV-SZ252M50/M58/M80/M88
RM-GA002
2-20.  HV Cap Assy Wire Dressing
2-21.  AC Power Cord Wire Dressing
Dress Cap Assy, High Voltage with Holder, HV Cable combi as shown.
CAUTION: 1) Make sure the specified position is 
 
being followed.
                  2)  Position the Cap Assy, High Voltage in 
 
the inner ring of the Holder, HV cable  
 
combi (see diagram).
TVSR requirement:
1. Spacing between HV cable and other conductive
part's surface is 1mm/kV or more.
2. Spacing between HV cable's and enclosure with
ventilation or the edge where terminal bracket and  
rear cover meet: 10mm or more.
Install AC cord holder to AC power cord at specified position as shown.
290 ± 5mm 
630 ± 5mm 
Hook AC cord into
CRT support's hook
Make sure AC cord is
straight between 
boss and holder
Attach AC cord onto
holder and insert to
bottom cover
Attach Purse Lock (S)
Ø 8 in to rear cover
Holder, HV cable combi
250 ± 5 mm
Large hook
Top view
Rotation coil
DGC
Dress behind boss
AC Cord Holder
Inner Ring
90º
CRT's carbon
area
HV cap
10 o'clock position
purse lock 
Ø
 9.
Dress Holder, HV Cable Combi to Cap Assy,
High Voltage and attach side hook to rotation
coil at 10 o'clock position. Then, attach large
hook to DGC and dress with
purse lock 
Ø
 9.
DGC
Side hook
Large 
hook
P-P taping
of DGC
Dress using Purse lock 
Ø
 9
Dress Holder, HV Cable
Combi to the right of P-P
taping of DGC. Dress
purse lock 
Ø
 9 to the right
of large hook on Holder,
HV Cable Combi.
CRT's carbon
area
Min. distance = 1mm/kV
Min. distance = 1mm/kV
Keep distance of HV cable
from other wires, conductive
parts and CRT's carbon area
Purse lock 
Ø
 9
Side hook
– 14 –
KV-SZ252M50/M58/M80/M88
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 3
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.
3-1. 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.
– 15 –
KV-SZ252M50/M58/M80/M88
RM-GA002
Moved RV750 (H.STAT)
R
R
G
G
B
B
A
A
B
B
B
B
R
G
G
R
B
3-2. CONVERGENCE ADJUSTMENT
Preparation:
• Before starting, perform FOCUS adjustment.
• Picture Mode "CUSTOM"
• Receive dot/cross hatch pattern.
1. (Moving vertically), adjust the 4 pole magnet to
converge red, green and blue dots in the center of
the screen.
2. Tilt the 4 pole magnet and adjust static convergence
to open or close the 4 pole magnet.
3. When the 4 pole magnet is moved in the direction of
arrow A and B, the red, green and blue dots moves
as shown below:-
a) Vertical Static Convergence
b) Horizontal Static Convergence
If the blue dots does not converge with the red and
green dots, use the 6 pole magnet to adjust in
the manner described below:-
c) Y Separation axis correction magnet adjustment.
1. Receive cross hatch signal.
2. Set Picture to "MINIMUM", Brightness to "STANDARD".
3. Adjust the Y separation axis correction magnet on
the Neck Assembly so that the horizontal lines at
the top and bottom of the screen are straight.
Neck assy
Neck assy
Red
Blue
Red
Blue
VM board
VM board
6 Pole Magnet
4 pole Magnet
DY pocket
Purity
6 Pole
Magnet
4 Pole
Magnet
R G
B
R
G
B
R
G B
R
B
R
G
G
G
B
R
B
4 pole magnet
RV750
H. STAT
RV1800
G2 (SCREEN) 
Center dot
R     G     B
G
R
B
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