Sony KV-32HQ100B Service Manual ▷ View online
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REMOVAL AND REPLACEMENT OF THE MAIN
-
BRACKET
BOTTOM PLATES.
(1) REMOVING THE PLATES
In the event of servicing being required to the solder side of the printed wiring boards, the
bottom plates fitted to the main chassis bracket require to be removed.
This is performed by cutting the gates with a sharp wire cutter at the locations indicated by the
arrows.
bottom plates fitted to the main chassis bracket require to be removed.
This is performed by cutting the gates with a sharp wire cutter at the locations indicated by the
arrows.
Note : There are 2 plates fitted to the main bracket.
Only remove the necessary plate to gain access to the printed wiring board.
(2) REFITTING THE PLATES
Because the plates differ in size it is important that the correct plates are refitted in their original
location.
location.
Please note that the plates need to be rotated 180 degrees from their cut position to allow the
tabs to be fitted into their catch positions.
tabs to be fitted into their catch positions.
Tab
Catch
For safety reasons, on no account should the plates be removed
and not refitted after servicing.
and not refitted after servicing.
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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.
KV-36HQ100
Adjust the upper and lower pin symmetrically by opening or
closing the Y-splitting axis correction magnets located on the
neck assembly. [See Fig 3-1]
KV-32HQ100
Enter the Deflection Service Menu as shown on page 30
and adjust VPIN_32.
Adjust the upper and lower pin symmetrically by opening or
closing the Y-splitting axis correction magnets located on the
neck assembly. [See Fig 3-1]
KV-32HQ100
Enter the Deflection Service Menu as shown on page 30
and adjust VPIN_32.
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.
5.
TT Commander
Fig.3-1
(2) Landing and Geometry
Note : Before carrying out the following adjustments adjust the
magnets as indicated on page 23 [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 SFC correction. (See Page 23)
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 (KV-36HQ100)
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-32HQ100)
of the neck assy between
the G2 grid and G1 grid.
(KV-32HQ100)
G2
G1
+
Align the edge
of the neck assy on the
edge of the G3 grid closest
to the G2 grid. (KV-36HQ100)
of the neck assy on the
edge of the G3 grid closest
to the G2 grid. (KV-36HQ100)
G3
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1.
Use TT Commander to Obtain TT55
2.
SFC Menu & Crosshatch pattern will appear. Press button’2’
to toggle to Landing mode. Menu will appear as;
to toggle to Landing mode. Menu will appear as;
3.
To adjust Landing, Choose Coarse or Fine mode by toggling
button ‘9’.
button ‘9’.
COARSE MODE ADJUSTABLE LOCATION
*In Coarse Mode, all data will change equally for that particular
side.
side.
FINE MODE ADJUSTABLE LOCATION
*In Fine Mode, data will change for that position only.
4.
Use commander arrows to move flashing location cursor to
required position for adjustment.
required position for adjustment.
5.
Choose required location by using arrow up, down, right,
left on commander to move location cursor.
(Cursor will start in centre position)
left on commander to move location cursor.
(Cursor will start in centre position)
6.
Edge locations only will adjust LCC coil data.
7.
Centre point will adjust NS coil data. (To obtain centre
position, choose COARSE mode, move cursor to +ve or-ve
x-axis and press left or right once.
position, choose COARSE mode, move cursor to +ve or-ve
x-axis and press left or right once.
3-2. SFC Landing Correction
LAND
COAR
LCC 00
NS 00
COAR
LCC 00
NS 00
Landing Mode
Coarse or Fine mode
Landing Correction Coil data
North/South Coil data
Coarse or Fine mode
Landing Correction Coil data
North/South Coil data
Location cursor (flashing)
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
Fig.3-6
4 Wedges
required
required
a
b
c
d
Purity control corrects
this area
this area
Deflection yoke positioning
corrects these areas
corrects these areas
Use SFC Landing
Correction to correct
these areas (a-d)
Correction to correct
these areas (a-d)
Purity control magnets
GREEN
BLUE
RED
Note
A new DY spacer was used during manufacture of
KV-36HQ100. If the DY is changed then the spacers on
the CRT funnel can be used. If the CRT is changed then use
standard DY spacer.
KV-36HQ100. If the DY is changed then the spacers on
the CRT funnel can be used. If the CRT is changed then use
standard DY spacer.
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N-S Coil Effect
8.
Once location is chosen, press ‘OK’ once, colour raster will
appear, flashing cursor will disappear. Press Text colour keys
(R,G,B,(Y=White)) to choose preferred raster colour. Use
commander arrow keys left & right to change LCC or NS coil
data in required mode. Once mis-landing has disappeared,
press ‘OK once again. This will bring back SFC cross hatch
pattern.
appear, flashing cursor will disappear. Press Text colour keys
(R,G,B,(Y=White)) to choose preferred raster colour. Use
commander arrow keys left & right to change LCC or NS coil
data in required mode. Once mis-landing has disappeared,
press ‘OK once again. This will bring back SFC cross hatch
pattern.
9.
If required, re-select another location for adjustment and repeat
steps 5) to 8).
steps 5) to 8).
10. Once all adjustment is complete, press ‘Mute’ key to Exit SFC
Test mode.
V.STAT
Vertical Static Magnet
H.STAT
convergence
control
RV7301 (H STAT)
H STAT Convergence
(on mount side)
H STAT Convergence
(on mount side)
Center dot
1 Change Adjust Point
2 Toggle Landing <> Convergence
4 Reverse the adjustment point
6 Video 5 <> Video 4
9 Coarse <> Fine
Exit SFC Test Mode
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.
3-3. 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.
B
G
R
B
G
R
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.
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
A B
A B
A B
A B
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 )
C
D
C
D
b). VMC correction by BMC [Hexapole] magnet and movement of
the electron beam.
5.
(KV-36HQ100)
When centre convergence adjustment is correct, use SFC
Convergence Correction for other areas of the screen.
(See page 25).
Convergence Correction for other areas of the screen.
(See page 25).
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.
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