Sony KV-32FS10 Service Manual ▷ View online
— 17 —
KV-32FS10/32FV15/32XBR250/34FV10/34FV15/34FV15C/34FX250C/34FV15K
34FV15T/36FS10/36FV15/36XBR250/38FX250/38FX250C/38FX250T/38FV15K
SECTION 3
SET-UP ADJUSTMENTS
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.
power supply voltage unless otherwise noted.
The controls and switch should be set as follows
unless otherwise noted:
unless otherwise noted:
PICTURE control ................. normal
BRIGHTNESS control ......... normal
3-1. BEAM LANDING
Preparation:
1.
Input white pattern from pattern generator.
2.
Loosen the deflection yoke mounting screw, and set
the purity control to the center as shown below:
3.
Input green pattern from pattern generator.
4.
Move the deflection yoke backward, and adjust with
the purity control so that green is in the center and
red and blue are even on both sides.
the purity control so that green is in the center and
red and blue are even on both sides.
B
R
G
Perform the adjustments in order as follows:
1. Beam Landing
2. Convergence
3. Focus
4. Screen (G2)/White Balance
2. Convergence
3. Focus
4. Screen (G2)/White Balance
Note: Test Equipment Required:
1. Color Bar Pattern Generator
2. Degausser
3. DC Power Supply
4. Digital Multimeter
5. Oscilloscope
6. CRT Analyzer
2. Degausser
3. DC Power Supply
4. Digital Multimeter
5. Oscilloscope
6. CRT Analyzer
5.
Move the deflection yoke forward, and adjust so that
the entire screen becomes green.
the entire screen becomes green.
6.
Switch over the raster signal to red and blue and
confirm the condition.
confirm the condition.
7.
When the position of the deflection yoke is determined,
tighten it with the deflection yoke mounting screw.
tighten it with the deflection yoke mounting screw.
8.
When landing at the corner is not right, adjust by using
the disk magnets.
the disk magnets.
a
b
c
d
d
a
c
Purity control
corrects this area.
Disk magnets or
rotatable disk
magnets correct
these areas(a-d).
Deflection yoke positioning
corrects these areas.
b
•
Input a white pattern signal.
•
Face the picture tube in an East or West direction to reduce the influence of geomagnetism.
NOTE: Do not use the hand degausser because it magnetizes the CRT .
— 18 —
KV-32FS10/32FV15/32XBR250/34FV10/34FV15/34FV15C/34FX250C/34FV15K
34FV15T/36FS10/36FV15/36XBR250/38FX250/38FX250C/38FX250T/38FV15K
34FV15T/36FS10/36FV15/36XBR250/38FX250/38FX250C/38FX250T/38FV15K
3-2. CONVERGENCE
( 1 ) Vertical and Horizontal Static Convergence
1.
Adjust V. STAT magnet to converge red, green and blue
dots in the center of the screen. (Vertical movement)
dots in the center of the screen. (Vertical movement)
B
G
R
V.STAT
Magnet
Center dot
Tilt the V. STAT magnet and adjust static convergence
to open or close the V. STAT magnet.
to open or close the V. STAT magnet.
2.
When the V. STAT magnet is moved in the direction of
arrow
arrow
a and b, red, green, and blue dots move as
shown below:
B
R
G
B
R
G
R
G
B
G
R
B
G
B
R
B
G
R
1
2
3
a
b
a
b
b
b
a
a
b
b
a
b
a
b
Operation of BMC (Hexapole) Magnet
The respective dot positions resulting from moving each
magnet interact, so perform adjustment while tracking.
magnet interact, so perform adjustment while tracking.
Use the VSTAT tabs to adjust the red, green, and blue dots
so they line up at the center of the screen (move the dots in
a horizontal direction.)
so they line up at the center of the screen (move the dots in
a horizontal direction.)
R G
B
R
G
B
R
G B
R
G
B
R
G
B
R
G
B
Y Separation Axis Correction Magnet Adjustment
1.
Input cross-hatch pattern, adjust PICTURE to
minimum and BRIGHTNESS to normal.
minimum and BRIGHTNESS to normal.
2.
Adjust the deflection yoke upright so it touches the
CRT.
CRT.
3.
Adjust so that the Y separation axis correction magnet
on the neck assembly is symmetrical from top to
bottom (open state).
on the neck assembly is symmetrical from top to
bottom (open state).
Purity
V. STAT
BMC (Hexapole)
4. Return the deflection yoke to its original position.
Preparation:
•
Before starting, perform FOCUS, V. LIN and V. SIZE adjustments.
•
Set BRIGHTNESS control to minimum.
•
Input dot pattern.
— 19 —
KV-32FS10/32FV15/32XBR250/34FV10/34FV15/34FV15C/34FX250C/34FV15K
34FV15T/36FS10/36FV15/36XBR250/38FX250/38FX250C/38FX250T/38FV15K
( 2 ) Dynamic Convergence Adjustment
•
Before starting, perform Horizontal and Vertical
Static Convergence Adjustment.
Static Convergence Adjustment.
1.
Slightly loosen deflection yoke screw.
2.
Remove deflection yoke spacers.
3.
Move the deflection yoke for best convergence as
shown below:
shown below:
B G R B
G
R
R
B
G
R
R
G
B
R G B
R G B
R G B B G R
R G B R
G
B
B
R
G
B
B G R
4.
Tighten the deflection yoke screw.
5.
Install the deflection yoke spacers.
(3) Screen-corner Convergence
Affix a permalloy assembly corresponding to the
misconverged areas:
misconverged areas:
( 4 ) TLH Plate Adjustment
•
Input crosshatch pattern
•
Adjust PICTURE QUALITY to standard, PICTURE and
BRIGHTNESS to 50%, and OTHER to standard.
BRIGHTNESS to 50%, and OTHER to standard.
•
Adjust the Horizontal Convergence of red and blue dots
by tilting the TLH plate on the deflection yoke.
by tilting the TLH plate on the deflection yoke.
1. Adjust XCV core to balance X axis.
2. Adjust YCH VR to balance Y axis.
3. Adjust vertical red and blue convergence with V.TILT
(TLV VR.)
Perform adjustments while tracking items 1 and 2.
(5 ) H Center SW Adjustment
•
Before adjusting H Center SW (S501, S502), make sure
that HPOS data is "7".
that HPOS data is "7".
TLH Plate
YCH
RV1750
V.STAT
V.STAT
XCV
C Board
TLV
(TLV)
B R R B
(R)(B) (B)(R)
(R)(B) (B)(R)
TLH+
TLH-
TLH-
a
b
c
d
b
a
d
c
a-d : screen-corner
misconvergence
misconvergence
— 20 —
KV-32FS10/32FV15/32XBR250/34FV10/34FV15/34FV15C/34FX250C/34FV15K
34FV15T/36FS10/36FV15/36XBR250/38FX250/38FX250C/38FX250T/38FV15K
34FV15T/36FS10/36FV15/36XBR250/38FX250/38FX250C/38FX250T/38FV15K
7.
Adjust screen VR until the screen is just cut off, or
scarcely lights up. A signal cannot be seen when the
brightness of the raster is high.
scarcely lights up. A signal cannot be seen when the
brightness of the raster is high.
8.
Push the JUMP again to release the cut off.
3-5. WHITE BALANCE ADJUSTMENTS
NO.
Disp.
Item
All Models
24
RDRV
Red Drive
31
25
GDRV
Green Drive
31
26
BDRV
Blue Drive
31
27
RCUT
Red Cut-off
7
28
GCUT
Green Cut-off
7
29
BCUT
Blue Cut-off
7
38
SBRT
Sub Bright
7
1.
Set program palette to "STANDARD" and push
"RESET.
2.
Input an entire white signal.
3.
Set to Service adjustment Mode.
4.
Set the PICTURE and BRIGHT to minimum.
5.
Adjust with SBRT if necessary.
6.
Set RCUT to "14".
7.
Select GCUT and BCUT with
1 and 4.
8.
Adjust with
3 and 6 for the best white balance.
9.
Set the PICTURE and BRIGHT to maximum.
10. Select GDRV and BDRV with
1 and 4.
11. Adjust with
3 and 6 for the best white balance.
12. Write into the memory by pressing
then
**.
NOTE:
White Balance should be adjusted after Sub Contrast
White Balance should be adjusted after Sub Contrast
because RDRV is also used in Sub Contrast adjustment.
(See page 29)
(See page 29)
3-3. FOCUS
1.
Input Monoscope signal.
2.
Set user controls to normal.
3.
Set Video mode to STANDARD.
4.
Set the PICTURE to maximum.
5.
Adjust FOCUS control for best picture at center
circle.
6.
Then receive an entire white signal. Make sure
Magenta Ring is at acceptable level
3-4. SCREEN (G2)
1.
Input signal from the pattern generator.
2.
Set the user controls to NORMAL.
3.
Attach the G2-Jig to the C Board.
4.
Adjust RCUT, GCUT, BCUT, and SBRT in service
mode with an oscilloscope so that voltages on the
red, green, and blue cathodes are 170 + 2 V DC.
mode with an oscilloscope so that voltages on the
red, green, and blue cathodes are 170 + 2 V DC.
5.
Observe the screen and adjust SCREEN (G2) VR to
obtain the fairly visible background of dot signal.
obtain the fairly visible background of dot signal.
6.
Push the TEST +JUMP (+ Channel) to cut off the
signal, then the screen is bright or dark. Brightness
of raster must be increased when adjusting.
signal, then the screen is bright or dark. Brightness
of raster must be increased when adjusting.
325 MARK
CENTER
CIRCLE
35 MARK
35
325
NN
NN
pedestal
NN
GND
170 + 2 Vdc
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