Sony KV-XA29K90 Service Manual ▷ View online
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25
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KV
-XA29K90
-XA29K90
RM-914
2-12. PICTURE TUBE REMOVAL
Note : i) Please remove necessary CRT support located on top left,
top right, bottom left, bottom right, prior to removing the CRT.
ii) 9 and ! (screws Tapping 7 + Crown Washer)
iii) Nut, Special, CRT and cap screw
iii) Nut, Special, CRT and cap screw
6
Two screws
wf
Cap, screw
wf
Cap,
screw
(+BVTP 4
× 16)
qh
C6 board
qg
Neck assy
qj
Degaussing coil
qk
Four claws
qa
Chassis assy
wa
Four DGC clips
8
Two screws
(+P 4
× 16)
(washer head)
q;
Two screws
Crown Washer)
(Tapping 7+
4
Two screws
(+P 4
× 16)
(washer head)
9
Two screws
Crown Washer)
(Tapping 7+
ws
Holder DGC
w;
Cushion (50x550) DGC
w;
Cushion (50x550) DGC
2
Two screws
(+BVTP 4
× 16)
1
Speaker
(5cm)
qf
Deflection
yoke
qd
Tension
spring
ql
DGC
band
qs
Anode cap
qg
Picture tube
qf
Cushion
5
Speaker
wd
Nut,
Special
CRT
CRT
wd
Nut,
Special
CRT
CRT
(5cm)
7
Speaker
(15
× 6.5cm)
3
Speaker
(15
× 6.5cm)
CRT (Top,right)
Support Assy
Support Assy
CRT (Top,left)
Support Assy
Support Assy
Two screws
(+BVTP 4
(+BVTP 4
× 16)
Two screws
(+BVTP 4
(+BVTP 4
× 16)
• 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 Do not damage the surface of anode-caps with sharp shaped objects.
2 Do not press the rubber too hard so as not to damage the inside of anode-cap.
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.
3 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
3 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
arrow
c.
2 Using a thumb pull up the rubber cap firmly in the direction indicated by the arrow b.
1 Turn up one side of the rubber cap in the direction indicated by the arrow a.
a
a
c
Anode Button
b
b
– 26 –
KV-XA29K90
RM-914
SECTION 3
ADVANCE OPERATION
3-1. "RESET" FUNCTION
1. Purpose
If a customer faces some setting problem that cannot be solved, using the "RESET" function some items will be reset
to its original setting (shipment condition)
to its original setting (shipment condition)
2. How to Operate
The way to access to the "RESET" Function:-
a) By pressing "MENU" button or "SELECT" button (for non-menu models) on the Front Key Input and hold it
down for 5 seconds.
3. Subsequent of Operation
Sequential to the resetting operation (either methods being used in No. 2), TV set would shut down once and
automatically turn on again. The power-off duration is expected to be about 500msec. An OSD message,
"RESET" tentatively will be displayed for 10 sec after IK status gets stable.
As a result, some items will be reset to an initial condition (shipment condition) wheareas some other remains at the
last selection by user.
automatically turn on again. The power-off duration is expected to be about 500msec. An OSD message,
"RESET" tentatively will be displayed for 10 sec after IK status gets stable.
As a result, some items will be reset to an initial condition (shipment condition) wheareas some other remains at the
last selection by user.
Items that remains at the last selection by user
Reset Items
Channel No., Favourite CH Setup,
PIC rotation, OSD Language, Skip
*= only when in RF mode
Video input
RF
Volume
30
Picture mode
DYNAMIC
Sound mode
DYNAMIC
Surround mode
OFF
Favourite CH mode
AUTO
Multi Picture (PIP)
OFF
PIP position
Bottom Right
OSD recall
OFF
Intelligent volume
OFF
Antenna sensitivity
HIGH*
Stereo mode
STEREO
Bilingual mode
MAIN*
Child lock
OFF*
Wide mode
OFF
Sleep timer
OFF
Wake-up timer
OFF
Sound muting
OFF
CABLE
OFF
– 27 –
KV-XA29K90
RM-914
•
The following adjustments should be made when a
complete realignment is required or a new picture tube is
installed.
complete realignment is required or a new picture tube is
installed.
•
These adjustments should be performed with rated power
supply voltage unless otherwise noted.
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. Pattern Generator
2. Degausser
3. Oscilloscope
SECTION 4
SET-UP ADJUSTMENTS
normal
Preparation :
•
In order to reduce the influence of geomagnetism on the
set's picture tube, face it east or west.
set's picture tube, face it east or west.
•
Switch on the set's power and degauss with the degausser.
4-1. BEAM LANDING
1. Input a white signal with the pattern generator.
Contrast
Brightness
Brightness
2. Position neck assy as shown in Fig4-2.
3. Set the pattern generator raster signal to a green raster.
4. Move the deflection yoke to the rear and adjust with the
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 4-1 through 4-4.)
and the red take up equally sized areas on each side.
(See Figures 4-1 through 4-4.)
5. Move the deflection yoke forward and adjust so that the
entire screen is green. (See Figure 4-2.)
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 4-5.)
(See Figure 4-5.)
}
Fig. 4-1
Fig. 4-2
Fig. 4-5
Fig. 4-4
Fig. 4-3
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
................................................................................................................................................................................................................
Neck assy
G2
G1
G3
Behind the G2 edge
Purity control
– 28 –
KV-XA29K90
RM-914
4-2. CONVERGENCE
Preparation :
•
•
Before starting this adjustment, adjust the focus, horizontal
size and vertical size.
size and vertical size.
•
Receive dot/hatch signal.
•
Pic mode: Personal (Pic 90%, Brightness 50%, Col 50 %,
Hue 50%, Shp 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.
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.
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.)
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
RV702
H. STAT
RV701
SCREEN (G2)
SCREEN (G2)
C6 Board
BMC (Hexapole)
V.STAT
DY pocket
Purity
V.STAT
BMC
Purity
1
V. STAT
2
H. STAT VR
3
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
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