Sony KV-J14KD7 Service Manual ▷ View online
– 13 –
KV
-J14KD7/J14KF7
-J14KD7/J14KF7
RM-883
2-6. PICTURE TUBE REMOVAL
b
b
2
Using a thumb press down, then pull up the rubber cap firmly in the direction
indicated by the arrow
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 turning up the rubber cap and pulling it up in the direc-
tion of the arrow
cap can be removed by turning up the rubber cap and pulling it up in the direc-
tion of the arrow
c
.
c
Anode button
•
HOW TO HANDLE AN ANODE-CAP
1
Do not damage the surface of anode-cap with 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.
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
•
REMOVAL OF ANODE-CAP
NOTE : After removing the anode, short circuit the anode of the picture tube and the an-
ode 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
.
a
a
2 A board
3 C board
4 Deflection yoke
Cushion
5 Four screws
(Tapping screws)
(Tapping screws)
1 Anode cap
– 14 –
KV-J14KD7/J14KF7
RM-883
•
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 switch 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
.................................................................................................................................................................................................................................
Preparation :
•
In order to reduce the influence of geomagnetism on the set's
picture tube, face it east or west.
•
Switch on the power and degauss with the degausser.
3-1. BEAM LANDING
1. Input a white signal with the pattern generator.
Contrast
Brightness
2. Set the pattern generator raster signal to green.
3. 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 3-3.)
4. Move the deflection yoke forward and adjust so that entire
screen is green. (See Figure 3-1.)
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.
7. If the beam does not land correctly in all the corners, use a
magnet to adjust it. (See Figure 3-4.)
Fig. 3-4
Fig. 3-3
GREEN
BLUE RED
Fig. 3-2
Fig. 3-1
Purity control
Deflection yoke positioning
corrects these areas.
Purity control corrects
this area.
Disk magnets or rotatable
disk magnets correct
these areas (a-d).
disk magnets correct
these areas (a-d).
b
c
a
d
b
a
c
d
}
normal
– 15 –
KV-J14KD7/J14KF7
RM-883
3-2. CONVERGENCE
Preparation :
•
Before starting this adjustment, adjust the focus, horizontal size,
and vertical size.
•
Minimize the brightness setting.
•
Provide dot pattern.
(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.
2. (Moving horizontally), adjust the H.STAT VR so that the red,
green and blue dots are on top of each other at the center of the
screen.
•
Operation of V.STAT magnet.
If the V.STAT magnet is moved in the direction of the
a and
b arrows, the red, green and blue dots move as shown below.
B
R
B
R
a
b
b
b
a
b
a
b
a
R
G
B
b
B
G
R
b
b
a
a
1
2
3
G
G
B G R
R G B
R G B
G
R
B
Center dot
V.STAT Magnet
C board
RV 701
SCREEN (G2)
V.STAT
Purity
•
Operation of BMC (Hexapole) magnet.
If the blue or red dot does not converge with the other two dots,
perform following steps.
Move BMC magnet (a) to cor rect insufficient H.static
convergence.
Rotate BMC magnet (b) to correct insufficient V.static
convergence.
In either case, repeat Beam Landing Adjustment.
a
BMC magnet
b
– 16 –
KV-J14KD7/J14KF7
RM-883
3. Move the deflection yoke as shown in the figure below and
optimize the convergence.
4. Tighten the deflection yoke screws.
5. Install the deflection yoke spacer.
(3) Screen-corner Convergence
(2) Dynamic Convergence Adjustment
Preparation :
•
Before starting this adjustment, adjust the horizontal static
convergence and the vertical static convergence.
1. Slightly loosen the deflection yoke screws.
2. Remove the deflection yoke spacer.
B G R
B
G
R
R
G
B
R G B
R G B
R
G
B
B
G
R
B G R
R G B
B G R
B G R
R G B
a-d : screen-corner
misconvergence
misconvergence
b
a
c
d
a
d
c
b
Fix a Permalloy assy
corresponding to the
misconverged areas
corresponding to the
misconverged areas
Permalloy assembly
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