Sony KV-28CL10B Service Manual ▷ View online
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Remove the rear cover fixing screws indicated and withdraw the rear cover from the Beznet.
SECTION 2
DISASSEMBLY
To remove lift the main bracket rear slightly and slide the
chassis away from the beznet, whilst holding the beznet base
down. Ensure that the interconnecting leads are released from
their purse locks to prevent damage being caused.
chassis away from the beznet, whilst holding the beznet base
down. Ensure that the interconnecting leads are released from
their purse locks to prevent damage being caused.
When refitting the chassis ensure that the main
bracket is located in the beznet guide slots before
sliding the chassis forwards. Refit the
interconnecting leads in their respective purse locks.
bracket is located in the beznet guide slots before
sliding the chassis forwards. Refit the
interconnecting leads in their respective purse locks.
2-2. Chassis Removal and Refitting
2-1. Rear Cover Removal
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2-5. D3 Board Removal
Position the chassis as indicated to access the solder side
of the PWB’s. To gain access to the A Board follow the
instructions on page 16. [Removal and Replacement of the
main bracket bottom plates ].
of the PWB’s. To gain access to the A Board follow the
instructions on page 16. [Removal and Replacement of the
main bracket bottom plates ].
2-3. A Board Removal [ Step 1 ]
2-4. A Board Removal [ Step 2 ]
2-6. Service Position
Screw.
Release the 3 securing clips located at the side of the chassis
and slide the PWB clear of the bracket.
and slide the PWB clear of the bracket.
Remove the 3 screws securing the PWB to the main bracket.
1 can be seen in the photo above and the other 2 are either
side of the FBT assembly.
1 can be seen in the photo above and the other 2 are either
side of the FBT assembly.
Clip.
Clip.
Release the securing clip circled and slide the PWB clear of
the bracket.
the bracket.
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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
How to handle the Anode-Cap
1 .
To prevent damaging the surface of the anode-cap do not use
sharp materials.
sharp materials.
2 .
Do not apply too great a pressure on the rubber, as this may cause
damage to the anode connector.
damage to the anode connector.
3 .
A metal fitting called a shatter hook terminal is fitted inside the
rubber cap.
rubber cap.
4 .
Do not turn the rubber foot over excessively, this may cause
damage if the shatter hook sticks out.
damage if the shatter hook sticks out.
Removal of the Anode-Cap
2-7. Picture Tube Removal
WARNING:
BEFORE REMOVING
THE ANODE CAP
High voltage remains in the CRT even
after the power is disconnected. To
avoid electric shock, discharge CRT
before attempting to remove the anode
cap. Short between anode and CRT
coated earth ground strap.
after the power is disconnected. To
avoid electric shock, discharge CRT
before attempting to remove the anode
cap. Short between anode and CRT
coated earth ground strap.
Coated Earth
Ground Strap
Ground Strap
1.
Discharge the anode of the CRT and remove the anode cap.
2.
Unplug all interconnecting leads from the Deflection yoke, neck
assy, degaussing coils and CRT grounding strap.
assy, degaussing coils and CRT grounding strap.
3.
Remove the C Board from the CRT.
4.
Remove the chassis assembly.
5.
Loosen the Neck assembly fixing screw and remove.
6.
Loosen the Deflection yoke fixing screw and remove.
7.
Place the set with the CRT face down on a cushion and remove
the Degaussing Coil holders.
the Degaussing Coil holders.
8.
Remove the Degaussing Coils.
9.
Remove the CRT grounding strap and spring tentioners.
10. Unscrew the four CRT fixing screws [ located on each CRT
corner ] and remove the CRT.
[Take care not to handle the CRT by the neck.]
[Take care not to handle the CRT by the neck.]
1
4
6
8
10
5
9
2
7
3
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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 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 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.
be fitted into their catch positions.
For safety reasons, on no account should the plates be re-
moved and not refitted after servicing.
moved and not refitted after servicing.
Tab
Catch
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