DOWNLOAD Sony KV-XJ29N90 Service Manual ↓ Size: 8.69 MB | Pages: 68 in PDF or view online for FREE

Model
KV-XJ29N90
Pages
68
Size
8.69 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-xj29n90.pdf
Date

Sony KV-XJ29N90 Service Manual ▷ View online

 21 
KV
-XJ29N90
RM-915
2-10. PICTURE TUBE  REMOVAL
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
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.
• HOW TO HANDLE AN ANODE-CAP
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.
Using a thumb pull up the rubber cap firmly in the direction indicated by the arrow b.
Turn up one side of the rubber cap in the direction indicated by the arrow a.
Anode button
a
a
b
b
c
0 Four DGC clips
9 Degaussing coil
6 Four claws
1 Two screws 
(+P 4 
× 16)
2 Speaker 
Bracket
assy (L)
Speaker
(15 
× 6.5 CM)
Speaker Bracket
assy (R)
4 Two screws
(Tapping)
Chassis assy
6 Deflection
yoke
7 VM1 Board
8 C6 board
3 Anode cap
5 Picture tube
Cushion
4 Two screws
(Tapping)
!£ Tension
spring
Two screws 
(+BVTP 4 
× 16)
Two screws 
(+BVTP 4 
× 16)
DGC holder
DGC holder
Cushion DGC
Cushion DGC
Two screws 
(+BVTP 4 
× 16)
Speaker
(15 
× 6.5 CM)
1 Two screws 
(+P 4 
× 16)
!∞
!™
– 22 –
KV-XJ29N90
RM-915
• 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
................................................................................................................................................................................................................................
}
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 en-
tire 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.)
Fig. 3-3
Purity control
Fig. 3-5
Purity control
corrects this area.
Disk magnets or rotatable
disk magnets correct these
areas (a-d).
Deflection yoke positioning
corrects these areas.
a
b
b
c
c
d
d
a
Fig. 3-4
Red
Blue
Green
Fig. 3-2
Neck assy
G2
G1
G3
Align the edge of
the neck assy with
the edge of the G2 grid.
Fig. 3-1
– 23 –
KV-XJ29N90
RM-915
3-2. CONVERGENCE
Preparation :
• Before starting this adjustment, adjust the focus, horizontal
size and vertical size.
• Receive dot/hatch signal.
• Pic mode: Personal (Pic 90%, Brightness 50%, Col 50%,
Hue 50%, Shp 50%)
(1)
Horizontal and Vertical Static Convergence
1. (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.
2. (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.
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.)
1
V. STAT
2
H. STAT VR
3
Center dot
R    G    B
R
G
B
H. STAT VR
V. STAT
Magnet
RV702
H. STAT
RV701
SCREEN (G2)
C6 Board
BMC (Hexapole)
V.STAT
DY pocket
Purity
V.STAT
BMC
Purity
R
R
R
R
G
G
G
G
B
B
B
B
a
a
a
b
b
b
b
R
R
G
G
B
B
a
a
b
b
b
5
Y separation axis correction magnet adjustment.
1. Receive the cross-hatch signal and adjust [PICTURE] to
[MIN] and [BRIGHTNESS] to [STANDARD]  .
2. 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.
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.
R G
B
R
G
B
R
G B
R
B
R
G
G
G
B
R
B
• Operation of V.STAT magnet
– 24 –
KV-XJ29N90
RM-915
TLV
Rotate
TLV-2 VOL (29”, 34”) on DY
XCV
Rotate
XCV
Adj core on DY
YCH
Rotate
YCH
VOL on DY
TLH
Insert
TLH
Correction Plate to DY Pocket (Left or
Right)
ON DY:
Note
1. The Red and Blue magnets should be equally far from the
horizontal center line.
2. Do not separate the Red and Blue magnets too far. (Less
than 8 mm)
(2) Dynamic Convergence Adjustment
Preparation:
• Before starting this adjustment, adjust the horizontal static
convergence and the vertical static convergence
Blue
Red
VM1 board
Blue
Red
VM1 board
Neck assy
Neck assy
R B
R B
TLH
TLV
YCH
XCV
B
R
R
B
YCH
XCV
TLV1
TLV2
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