DOWNLOAD Sony KD-28DX40U Service Manual ↓ Size: 8.25 MB | Pages: 62 in PDF or view online for FREE

Model
KD-28DX40U
Pages
62
Size
8.25 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kd-28dx40u.pdf
Date

Sony KD-28DX40U Service Manual ▷ View online

- 13 -
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. 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.
Remove the two screws fixing the user control module to the
side of the set. The control module can then be removed by
sliding it towards the rear of the set allowing access to the H2
Board.
2-1. Rear Cover Removal
2-2. Side Control Module Removal
2-3. Chassis Removal and Refitting
Screws
=>
=>
=>
<=
<=
<=
<=
<=
<=
<=
- 14 -
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 ].
Remove the shield case by pulling vertically until it is clear of the N Board. Release the N board socket retaining clips, circled, by
gently prising them with a screwdriver and carefully lift the N Board vertically.
2-6. N Board Removal
2-4. Service Position
Release the clip circled and pull the F6 bracket towards the
rear of the set. The bracket can then be removed to allow
access to the boards.
To remove the F6 and H8 Boards release the clips circled and
ease the boards gently away from the support bracket.
Clip
Clips
Clips
Shield
case
2-5. F6 and H8 Board Removal
- 15 -
Anode button
a
*   REMOVING  PROCEDURES.
Turn up one side of the rubber cap in
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
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
b
b
c
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.
3.
A metal fitting called a shatter hook terminal is fitted inside the
rubber cap.
4.
Do not turn the rubber foot over excessively, this may cause
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.
Coated Earth
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.
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.
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.]
1
3
4
6
8
10
5
9
2
7
- 16 -
REMO
V
AL AND REPLA
CEMENT OF 
THE MAIN
-
BRA
CKET
BO
TT
OM PLA
TES.
(1)  REMO
VING 
THE PLA
TES
In the event of servicing being required to the solder side of the D 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.
Note :
There are 3 plates fitted to the main bracket and secured by3 gates.
Only remove the necessary plate to gain access to the printed wiring board.
(2)  REFITTING 
THE PLA
TES
Because the plates differ in size it is important that the correct plates are refitted in their original
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.
For safety reasons, on no account should the plates be re-
moved and not refitted after servicing.
Ta
b
Catch
Page of 62
Display

Click on the first or last page to see other KD-28DX40U service manuals if exist.