Sony KV-21FA310 (serv.man2) Service Manual ▷ View online
14
KV-21FA310/21FV210/29FA310/29FS110/29FV210
KV-21FA310/21FV210/29FA310/29FS110/29FV210
The following adjustments should be made when a complete
realignment is required or a new picture tube is installed.
realignment is required or a new picture tube is installed.
These adjustments should be performed with rated power supply
voltage unless otherwise noted.
voltage unless otherwise noted.
Set the controls as follows unless otherwise noted:
VIDEO MODE: Pro
PICTURE CONTROL: Normal
BRIGHTNESS CONTROL: Normal
VIDEO MODE: Pro
PICTURE CONTROL: Normal
BRIGHTNESS CONTROL: Normal
SECTION 2: SET-UP ADJUSTMENTS
Perform the adjustments in order as follows:
1. Beam
1. Beam
Landing
2. Convergence
3. Focus
4. Screen
3. Focus
4. Screen
(G2)
5. White
Balance
Note Test Equipment Required:
1.
Color Bar Pattern Generator
2. Degausser
3.
DC Power Supply
4. Digital
Multimeter
2-1. BEAM LANDING
Before beginning adjustment procedure:
1. Feed in the white pattern signal.
Adjustment Procedure
1. Input a raster signal with the pattern generator.
2. Loosen the defl ection yoke mounting screw, and set the purity
control to the center as shown below:
Purity Control
3. Turn the raster signal of the pattern generator to green.
4. Move the defl ection yoke backward, and adjust with the purity control
so that green is in the center and red and blue are even on both
sides.
sides.
Blue Red
Green
5. Move the defl ection yoke forward, and adjust so that the entire
screen becomes green.
6. Switch over the raster signal to red and blue and confi rm the
condition.
7. When the position of the defl ection yoke is determined, tighten it with
the defl ection yoke mounting screw.
8. If landing at the corner is not right, adjust by using the disk magnets.
a
c
b
d
b
a
c
d
Purity control
corrects this area.
Disk magnets
or rotatable disk
magnets correct
these areas (a-d).
Deflection yoke positioning
corrects these areas.
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KV-21FA310/21FV210/29FA310/29FS110/29FV210
KV-21FA310/21FV210/29FA310/29FS110/29FV210
2-2. CONVERGENCE
Before starting convergence adjustments:
1 Perform FOCUS, VLIN and VSIZE adjustments.
2. Set BRIGHTNESS control to minimum.
3. Feed in dot pattern.
Vertical Static Convergence
1. Adjust V. STAT magnet to converge red, green and blue dots in the
center of the screen.
B
G
R
Center dot
V.STAT magnet
RV701
H.STAT
B
G
R
2. Tilt the V. STAT magnet and adjust static convergence to open or
close the V. STAT magnet.
When the V. STAT magnet is moved in the direction of arrow a and b,
red, green, and blue dots move as shown below:
red, green, and blue dots move as shown below:
B
R
G
B
R
G
R
G B
B
G R
1
2
b
b
b
b
b
b
b
a
a
b
a
a
a
a
3
R
G
B
B
G
R
Horizontal Static Convergence
If the blue dot does not converge with the red and green dots, perform
the following:
1. Move H STAT VR magnet (a) to correct insuffi cient H.Static
the following:
1. Move H STAT VR magnet (a) to correct insuffi cient H.Static
convergence.
B
MC MA
G
NET
PURITY
V.STAT
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KV-21FA310/21FV210/29FA310/29FS110/29FV210
KV-21FA310/21FV210/29FA310/29FS110/29FV210
Dynamic Convergence Adjustment
Before performing this adjustment, perform Horizontal and Vertical
Static Convergence Adjustment.
1. Slightly loosen defl ection yoke screw.
Static Convergence Adjustment.
1. Slightly loosen defl ection yoke screw.
2. Remove defl ection yoke spacers.
3. Move the defl ection yoke for best convergence as
shown below:
B
G
R
G
B
R
G
B
R
R
R
G
B
G
B
G
B
R
B
G
R
G
B
G
B
R
R
G
B
G
G
B
R B
R
R
4. Tighten the defl ection yoke screw.
5. Install the defl ection yoke spacers.
TLH Plate Adjustment
1. Input crosshatch pattern.
2. Adjust PICTURE QUALITY to standard, PICTURE and
BRIGHTNESS to 50%, and OTHER to standard.
3 Adjust the Horizontal Convergence of red and blue dots by tilting the
TLH plate on the defl ection yoke.
(TLV)
YCH
XCV
TLV
C
Board
Board
RV701
V.STAT
TLH Plate
B R R B
(R)(B) (B)(R)
(R)(B) (B)(R)
TLH+
TLH-
TLH-
4. Adjust XCV core to balance X axis.
5. Adjust YCH VR to balance Y axis.
6. Adjust vertical red and blue convergence with V.TILT (TLV VR.)
Note: Perform adjustment 3-6 while tracking OSD items 1 and 2.
Screen-Corner Convergence
1. Affi x a permalloy assembly corresponding to the misconverged areas:
b
a
c
d
a
b
d
a-d: screen-corner
misconvergence
c
2-3. FOCUS
1. Adjust FOCUS control for best pictures.
Focus (FV)
Screen (G2)
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KV-21FA310/21FV210/29FA310/29FS110/29FV210
KV-21FA310/21FV210/29FA310/29FS110/29FV210
2-4. SCREEN (G2)
1. Input a dot pattern.
2. Set the PICTURE and BRIGHTNESS controls at minimum and
COLOR control at normal.
3. Adjust SBRT, GCUT, BCUT in service mode with an oscilloscope as
shown below so that voltages on the red, green, and blue cathodes
are 172 ± 2VDC.
are 172 ± 2VDC.
Pedestal
172 – 2VDC
Ground
±
4. Observe the screen and adjust SCREEN (G2) VR in FBT to obtain
the faintly visible background of dot signal.
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