Sony KV-32FQ80B Service Manual ▷ View online
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•
When complete readjustment is necessary or a new picture tube
is installed, carry out the following adjustments.
is installed, carry out the following adjustments.
•
Unless there are specific instructions to the contrary, carry out
these adjustments with the rated power supply.
these adjustments with the rated power supply.
•
Unless there are specific instructions to the contrary, set the
controls and switches to the following settings :
controls and switches to the following settings :
Contrast
.................................. normal
Brightness .................................. normal
Preparation :
1.
In order to reduce the influence of geomagnetism on the set’s
picture tube, face it in an easterly or westerly direction.
picture tube, face it in an easterly or westerly direction.
2.
Switch on the TV set’s power and degauss with a degausser.
(1) Adjustment of Correction Magnet for Y-Splitting Axis.
1.
Input a crosshatch signal from the pattern generator.
2.
Set the Picture control to minimum and confirm that the
Brightness control is set to normal.
Brightness control is set to normal.
3.
Position the neck assembly as indicated in Fig.3-3.
4.
Loosen the deflection yoke fixing screw.
5.
Move the deflection yoke as far forward as is possible.
6.
Adjust the upper and lower pin symmetrically by opening or
closing the Y-splitting axis correction magnets located on the
neck assembly. [See Fig 3-2]
closing the Y-splitting axis correction magnets located on the
neck assembly. [See Fig 3-2]
7.
Return the deflection yoke to its original position and re-tighten
its fixing screw.
its fixing screw.
Carry out the adjustments in the following order :
3-1.
3-1.
Beam Landing and Geometry.
3-2.
Convergence.
3-3.
Focus.
3-4.
White Balance.
Note : Test equipment required.
1.
Color bar/pattern generator.
2.
Degausser.
3.
Oscilloscope.
4.
Digital multimeter.
Fig.3-1
(2) Landing and Geometry
Note : Before carrying out the following adjustments adjust the
magnets as indicated on page 18 [See Fig.3-4].
1.
Input a crosshatch signal from the signal generator.
2.
Rough-adjust the focus and horizontal convergence.
3.
Switch from the crosshatch pattern to an all-red pattern.
4.
Move the deflection yoke backwards and adjust with the purity
magnet so that the red is at the centre and it aligns
symmetrically [See Fig.3-5].
magnet so that the red is at the centre and it aligns
symmetrically [See Fig.3-5].
5.
Move the deflection yoke forward to the point where the entire
screen just becomes red [Mark its position].
screen just becomes red [Mark its position].
6.
Move the deflection yoke further forward until the screen just
changes colour at the edges. [Mark its position].
changes colour at the edges. [Mark its position].
7.
Position the deflection yoke between the two marks indicated
above.
above.
8.
Input a crosshatch pattern from the pattern generator and rotate
the deflection yoke so that the horizontal lines are parallel with
the top and bottom of the screen.
the deflection yoke so that the horizontal lines are parallel with
the top and bottom of the screen.
9.
When the position of the deflection yoke has been determined,
fasten it with its fixing screw.
fasten it with its fixing screw.
10. Once dy rotation and swing left and right for h linearity is ok on
cross hatch pattern, insert dy wedges. [See Fig.3-6].
11. Switch the pattern generator to green then blue and confirm the
purity.
12. If the beam does not land correctly in all the corners of the
screen, use disk magnets to correct it. [Confirm the corner
landing forgreen and blue].
landing forgreen and blue].
13. Re-check geometry for landing magnet effect. Adjust using
deflection menu. [TT Mode].
Caution :
High voltages are present on the Deflection yoke terminals - take care
when handling the Deflection yoke whilst carrying out adjustments.
High voltages are present on the Deflection yoke terminals - take care
when handling the Deflection yoke whilst carrying out adjustments.
Y-splitting axis correction magnet
Fig.3-2
Fig.3-3
SECTION 3 SET-UP ADJUSTMENTS
3-1. Beam Landing
Neck assy
Align the edge
of the neck assy between
the G2 grid and G1 grid.
(KV-32FQ80)
of the neck assy between
the G2 grid and G1 grid.
(KV-32FQ80)
G2
G1
+
Align the edge
of the neck assy on the
edge of the G3 grid closest
to the G2 grid. (KV-36FQ80)
of the neck assy on the
edge of the G3 grid closest
to the G2 grid. (KV-36FQ80)
G3
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Fig.3-5
Purity magnets
Align pips on
each magnet
each magnet
Fig.3-4
Align both Purity
magnets to the vertical
position
magnets to the vertical
position
Purity control magnets
Fig.3-6
5 Wedges
required
required
V.STAT
Vertical Static Magnet
H.STAT
convergence
control
RV9001 (H STAT)
H STAT Convergence
(on mount side)
H STAT Convergence
(on mount side)
Center dot
a
b
c
d
Purity control corrects
this area
this area
Deflection yoke positioning
corrects these areas
corrects these areas
Disk magnets or
rotatable disk
magnets correct
these areas (a-d)
rotatable disk
magnets correct
these areas (a-d)
Disk Magnets
GREEN
BLUE
RED
(1) Screen centre convergence [Static convergence]
1.
Input a dot pattern signal from the pattern generator.
2.
Normalize the picture setting.
3.
[Moving vertically], adjust the V.STAT magnet so that the
vertical red, green and blue dots coincide at the centre of the
screen.
vertical red, green and blue dots coincide at the centre of the
screen.
3-2. Convergence
By opening or closing the V.STAT magnet, the red green and
blue dots move in the direction indicated below.
blue dots move in the direction indicated below.
Note:
Do not adjust the H.STAT by rotating the V.STAT
magnets as this can affect the focus setting.
magnets as this can affect the focus setting.
B
G
R
B
G
R
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4.
Correction for HMC [Horizontal mis-convergence] and VMC
[Vertical mis-convergence] by using the BMC [Hexapole]
magnet.
[Vertical mis-convergence] by using the BMC [Hexapole]
magnet.
a). HMC correction by BMC [Hexapole] magnet and movement of
the electron beam.
b). VMC correction by BMC [Hexapole] magnet and movement of
the electron beam.
Adjust the HAMP using HAMPL and HAMPR registers in the
Dynamic Convergence section of the service menu.
Dynamic Convergence section of the service menu.
HTIL correction can be performed by adding a THL correction
assembly to the Deflection yoke.
assembly to the Deflection yoke.
C < D
C = D
C > D
C = D
R
G
G
B
C
D
C
D
R
G
B
R
G
B
R
G
B
V M C c o r r e c t i o n ( A )
V M C c o r r e c t i o n ( B )
THL Correction assy
HAMP Adjustment
HTIL Adjustment
YCH Adjustment
H M C c o r r e c t i o n ( A )
H M C c o r r e c t i o n ( B )
A < B
A = B
R G
B
R G B
A > B
A = B
R
G B
R G B
TLV Adjustment
H-TRAP Adjustment
The H-TRAP should not be adjusted unless absolutely necessary as it
affects the TLV settings.
affects the TLV settings.
+
+
+
YCH VR
Deflection Yoke
+
+
+
TLV VR
Deflection Yoke
HTRAP VR
+
+
+
Deflection Yoke
A B
A B
A B
A B
C
D
C
D
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Y-splitting axis correction magnet
V STAT convergence magnet
BMC (Hexaploe) magnet
Purity magnet
a-d: screen-corner
convergence defect
convergence defect
a
b
c
d
Focus
Screen
c
a
d
b
Install the permalloy assembly
for the area that needs correcting.
for the area that needs correcting.
Permalloy Assy
X-4387-214-1.
X-4387-214-1.
Convergence adjustment with permalloy
3-3. Focus Adjustment
1.
Receive a cross hatch pattern from a video generator.
2.
Adjust the focus control located on the flyback transformer to
the best level at the centre of the screen.
the best level at the centre of the screen.
3.
Check left and right x-axis vertical line thickness and adjust to
make them as thin as possible.
make them as thin as possible.
4.
Considering x-axis and centre, adjust to make uniform.
5.
If no cross hatch signal is possible, follow the next three steps.
6.
Receive a television broadcast signal.
7.
Normalize the picture setting.
8.
Adjust the focus control located on the flyback transformer to
obtain the best focus at the centre of the screen.
Bring only the centre area of the screen into focus, the magenta-
ring appears on the screen. In this case, adjust the focus to
optimize the screen uniformly.
obtain the best focus at the centre of the screen.
Bring only the centre area of the screen into focus, the magenta-
ring appears on the screen. In this case, adjust the focus to
optimize the screen uniformly.
3-4. Screen (G2), White Balance
[Adjustment in the service mode using the remote
commander]
commander]
G2 adjustment
1.
Input a dot signal from the pattern generator.
2.
Set the Picture, Brightness and Colour to minimum.
3.
Apply 165V DC from an external power supply to the R, G
and B cathodes of the CRT.
and B cathodes of the CRT.
4.
Whilst watching the picture, adjust the G2 control [SCREEN]
located on the flyback transformer to the point just before the
flyback return lines disappear.
located on the flyback transformer to the point just before the
flyback return lines disappear.
Layout of each control
Note : If you are unable to adjust the corner convergence properly,
this can be corrected with the use of permalloy magnets.
White balance adjustment for TV mode
1.
Input an all-white signal from the pattern generator.
2.
Program the Remote Commander for operation in Service Mode.
[See Page 25].
[See Page 25].
3.
Enter into the ‘Service Mode’ by pressing ‘VIDEO’ button twice
and ‘MENU’ on the Service Commander.
and ‘MENU’ on the Service Commander.
4.
Select ‘Device Register Setting’ from the on screen menu display
and press ‘Right Arrow’.
and press ‘Right Arrow’.
5.
Select ‘Backend’ from the on screen menu display and press
‘Right Arrow’.
‘Right Arrow’.
6.
Set the ‘Contrast’ to MAX.
7.
Set the ‘R-Drive’ to 45.
8.
Adjust the ‘G-Drive’ and the ‘B-Drive’ so that the white
balance becomes optimum.
balance becomes optimum.
9.
Press the ‘OK’ button to write the data for each item.
10. Set the ‘Contrast’ to MIN.
11. Set the ‘R-Cutoff’ to 35.
12. Adjust the ‘G-Cutoff’, and the ‘B-Cutoff’ with the left and
11. Set the ‘R-Cutoff’ to 35.
12. Adjust the ‘G-Cutoff’, and the ‘B-Cutoff’ with the left and
right buttons on the remote commander so that the white
balance becomes optimum.
balance becomes optimum.
13. Press the ‘OK’ button to write the data for each item.
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