Sony KV-HW21M30 Service Manual ▷ View online
– 9 –
KV-HW21M30/HW21N63
RM-W101
RM-W150
1-9.
PICTURE TUBE REMOVAL
Note:
• The Picture Tube is upside-down for (KV-HW21M30(Aus) only and the position for the anode cap and tension
springs are changed accordingly.
• Please make sure the TV set is not in standing position before removing necessary CRT support located on bottom
Mright and left.
1) Place the TV set with the CRT face down on a cushion jig.
2) Remove the rear cover.
3) Unplug all under connecting leads from the Deflection Yoke, Degaussing Coil and CRT grounding strap. •
2) Remove the rear cover.
3) Unplug all under connecting leads from the Deflection Yoke, Degaussing Coil and CRT grounding strap. •
Please make sure the TV set is not in standing position before removing necessary CRT support located on bottom
right and left.
right and left.
1-7.
J BOARD REMOVAL
J Board
(KV-HW21N63)
(KV-HW21N63)
1-8.
A BOARD REMOVAL
A Board
4
Anode Cap Removal
5
C Board Removal
7
Chassis Assy Removal
8
Support, CRT Removal (x2)
9
Holder, DGC Removal (x2)
0
Degaussing Coil
qa
Spring Tension
Removal (x2)
qd
Nut locking, CRT (x4)
qs
Earth Coating Assy
6
Loosen the Deflection Yoke
fixing screw and remove
qf
Top switch, block
– 10 –
KV-HW21M30/HW21N63
RM-W101
RM-W150
• 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
1
Turn up one side of the rubber cap in the direction
indicated by the arrow A.
indicated by the arrow A.
2
Using a thumb pull up the rubber cap firmly in the di-
rection indicated by the arrow B.
rection indicated by the arrow B.
3
When one side of the rubber cap is separated from
the anode button, the anode-cap can be removed by
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.
direction of the arrow C.
• HOW TO HANDLE AN ANODE-CAP
1
Do not damage the surface of anode-caps with
sharp shaped objects.
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.
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.
The shatter-hook terminal will stick out or damage
the rubber.
anode button
a
a
b
b
c
– 11 –
KV-HW21M30/HW21N63
RM-W101
RM-W150
• The following adjustments should be made when a
complete realignment is required or a new picture
tube is installed.
tube is installed.
Set the controls as follows unless otherwise noted:
VIDEO model ..................................................... Standard
PICTURE control .................................................. normal
BRIGHTNESS control .......................................... normal
VIDEO model ..................................................... 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.
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
2. Degausser
3. DC Power Supply
4. Digital Multimeter
5. Oscilloscope
SECTION 2
SET-UP ADJUSTMENTS
Fig. 2-1
Fig. 2-4
Fig. 2-3
Fig. 2-2
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
Preparation :
• In order to reduce the influence of geomagnetism on
• 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.
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
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 2-1 through 2-4.)
the blue and the red take up equally sized areas on
each side. (See Figures 2-1 through 2-4.)
4. Move the deflection yoke forward and adjust so that
the entire screen is green. (See Figure 2-1.)
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.
and DY spacers.
7. If the beam does not land correctly in all the corners,
use a magnet to adjust it. (See Figure 2-4.)
}
......................................................................................................................................................................................................................
normal
– 12 –
KV-HW21M30/HW21N63
RM-W101
RM-W150
R G
B
R
G
B
R
G B
R
B
R
G
G
G
B
R
B
2-2.
CONVERGENCE
• Before starting this adjustment, adjust the focus,
horizontal size and vertical size.
• Receive dot/hatch signal.
• Pic mode: Soft.
• Pic mode: Soft.
(1) Horizontal and Vertical Static Convergence
1. (Moving vertically), adjust the V.STAT magnet so that
the red, green and blue dots are on top of each other
at the center of the screen.
at the center of the screen.
2. (Moving horizontally), adjust the H.STAT control so
that the red, green and blue dots are on top of each
other at the center of the screen.
other at the center of the screen.
3. If the H.STAT variable resistor cannot bring the red,
green and blue dots together at the center of the
screen, adjust the horizontal convergence with the
H.STAT variable resistor and the V.STAT magnet in
the manner given below.
(In this case, the H.STAT variable resistor and the
V.STAT magnet influence each other, so be sure to
perform adjustments while tracking.)
screen, adjust the horizontal convergence with the
H.STAT variable resistor and the V.STAT magnet in
the manner given below.
(In this case, the H.STAT variable resistor and the
V.STAT magnet influence each other, so be sure to
perform adjustments while tracking.)
Center dot
R G B
R
G
B
H. STAT VR
V. STAT
Magnet
RV750
H. STAT
H. STAT
C Board
BMC (Hexapole)
V.STAT
DY pocket
Purity
V.STAT
BMC
Purity
Operation of V.STAT magnet
If the V.Stat magnet is moved in the “A” and “B” arrows,
the red, green and blue dots moves as shown below.
If the V.Stat magnet is moved in the “A” and “B” arrows,
the red, green and blue dots moves as shown below.
Moved RV750 H.STAT.
the red, green and blue dots move as shown below.
the red, green and blue dots move as shown below.
4. BMC (Hexapole) Magnet.
If the red, green and blue dots are not balanced or
aligned, then use the BMC magnet to adjust in the
manner described below.
aligned, then use the BMC magnet to adjust in the
manner described below.
R
R
G
G
B
B
A
B
B
A
R
R
G
G
B
B
A
B
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