Sony KV-29X5A Service Manual ▷ View online
13
KV-29X5
2-4. H1 BOARD REMOVAL
2-5. S1 BOARD REMOVAL
2-3. SERVICE POSITION
To release, push the claws in the direction
of the arrow as indicated.
of the arrow as indicated.
Release the clip indicated.
14
KV-29X5
Anode button
a
* REMOVING PROCEDURES.
Turn up one side of the rubber cap in
the direction indicated by the arrow a
the direction indicated by the arrow a
1
2 Using a thumb pull up the rubber cap
firmly in the direction indicated by the
arrow b
firmly in the direction 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 direction of the arrow c
separated from the anode button, the
anode-cap can be removed by turning
up the rubber cap and pulling it up in
the direction of the arrow c
b
b
c
Note : Short circuit the anode of the picture tube and the anode cap to the metal chassis, CRT shield or carbon paint on the CRT, after removing the anode.
• REMOVAL OF ANODE-CAP
•
HOW TO HANDLE THE ANODE-CAP
1
To prevent damaging the surface of the anode-cap do not use sharp materials.
2
Do not apply too great a pressure on the rubber, as this may cause damage to the
anode connector.
anode connector.
3
A metal fitting called a shatter hook terminal is fitted inside the rubber cap.
Do not turn the rubber foot over excessively this may cause damage if the shatter
hook sticks out.
Do not turn the rubber foot over excessively this may cause damage if the shatter
hook sticks out.
Cushion
10 Four PT screws (M)
3 C board
1 Anode cap
8 Degaussing coils
9 Spring Extension
2 Chassis assy
7 Two DGC holders
6 Deflection yolk
4 VM Board
5 Neck assy
11 Picture tube
2-6. PICTURE TUBE REMOVAL
15
KV-2
9X5
Tab
Catch
Catch
Catch
Catch
Catch
Tab
Tab
Tab
Tab
Refitting
Gate
Gate
Gate
Gate
Gate
Gate
Gate
Gate
REMOVAL AND REPLACEMENT OF THE MAIN-BRACKET
BOTTOM PLATES.
BOTTOM PLATES.
(1)
REMOVING THE PLATES
In the event of servicing being required to the solder side of the A Board printed
wiring board, 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
shown and indicated by arrows.
wiring board, 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
shown and indicated by arrows.
Note :There are 2 plates fitted to the main bracket and secured by 4 gates.
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.
their original location.
Please note that the plates need to be rotated 180 degrees from the cut position to
to allow the tabs to be fitted in the catch positions.
to allow the tabs to be fitted in the catch positions.
£
For safety reasons, on no account should the plates be
removed and not refitted after servicing.
removed and not refitted after servicing.
16
•
When complete readjustment is necessary or a new
picture tube is installed, carry out the following
adjustments.
picture tube is installed, carry out the following
adjustments.
•
Unless there are specific instructions to the contrary,
carry out these adjustments with the rated power supply.
carry out 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
...............
80% [or remote control normal]
Brightness
...............
50%
Carry out the following adjustments in this order :
3-1.
Beam Landing
3-2.
Convergence
3-3.
Focus
3-4.
White balance
Note :
Test equipment required
1.
1.
Color bar/pattern generator.
2.
Degausser.
3.
Oscilloscope.
4.
Digital multimeter.
5.
DC Power supply.
SECTION 3
SET-UP ADJUSTMENTS
KV-29X5
GREEN
BLUE
RED
a
b
c
d
a
c
b
d
Purity control corrects
this area.
this area.
Deflection yolk 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).
Purity Control
Deflection Yoke
G1
Neck Assy
A buckle
G2
For 29" models align the neck assy
as indicated below.
as indicated below.
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 the
degausser.
degausser.
3-1. BEAM LANDING
1.
Input an all-white signal from the pattern generator.
Set the Contrast and Brightness to normal.
Set the Contrast and Brightness to normal.
2.
Set the pattern generator raster signal to all Red.
3.
Move the deflection yolk forward and adjust with the purity
control so that the Red is at the centre and the Blue and Green
take up equally sized areas on each side of the screen.
[See Fig.3-1 - 3-3].
control so that the Red is at the centre and the Blue and Green
take up equally sized areas on each side of the screen.
[See Fig.3-1 - 3-3].
4.
Move the deflection yolk forward and adjust so that the entire
screen becomes Red. [See Fig.3-1].
screen becomes Red. [See Fig.3-1].
5.
Switch the raster signal to Blue, then to Green and verify the
purity condition.
purity condition.
6.
When the position of the deflection yolk has been determined,
fasten the deflection yolk with the screws.
fasten the deflection yolk with the screws.
7.
If the beam does not land correctly in all the corners, use
magnets to correct it. [See Fig.3-4].
magnets to correct it. [See Fig.3-4].
Fig. 3-1
Fig. 3-2
Fig. 3-3
Fig. 3-4
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