Sony KD-32DX100U Service Manual ▷ View online
- 17 -
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
2-12. 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
3
4
6
8
10
5
9
2
7
- 18 -
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 some 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.
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.
Ta
b
Catch
For safety reasons, on no account should the plates be removed
and not refitted after servicing.
- 19 -
From time to time dust particles or condensation may get trapped between the glass panel and the TV screen. These instructions will
guide you through the steps required to both remove and re-fit the glass panel safely.
guide you through the steps required to both remove and re-fit the glass panel safely.
Removing the glass panel
NEVER attempt to remove the glass panel on your own - for safety reasons Sony recommends that two people carry out the
following procedure at all times.
following procedure at all times.
Support the bottom of the glass
panel as shown AT ALL TIMES.
panel as shown AT ALL TIMES.
Whilst pushing the release clip,
slide the glass panel up.
slide the glass panel up.
Push the clips located on the
underside of the TV, as shown, to
release the glass panel.
underside of the TV, as shown, to
release the glass panel.
Trinitron
Re-fitting the glass panel
NEVER attempt to re-fit the glass panel on your own - for safety reasons Sony recommends that two people carry out the following
procedure at all times.
procedure at all times.
1
Safety Note
The glass panel supplied complies with all relevant safety regulations. However, should the glass become damaged at
any time, it is strongly recommended that a replacement is obtained from an authorised Sony dealer.
any time, it is strongly recommended that a replacement is obtained from an authorised Sony dealer.
1
Lift the glass, and move toward
the TV.
the TV.
2
3
Tilt the glass panel forwards at the
top to engage all the locating pins,
then push forward firmly to secure.
top to engage all the locating pins,
then push forward firmly to secure.
4
2
3
6
5
4
Supporting the glass panel, tilt it
away from the TV.
away from the TV.
Carefully remove the glass panel
and place it safely in an upright
position. To avoid injury or damage,
do not leave it on the floor.
and place it safely in an upright
position. To avoid injury or damage,
do not leave it on the floor.
Clean both sides of the glass and the
TV screen. Use a soft, damp, lint free
cloth. Do not use any chemical
solutions or abrasive cleaners.
TV screen. Use a soft, damp, lint free
cloth. Do not use any chemical
solutions or abrasive cleaners.
CAUTION
Before removing your hands check that you are unable to move the glass.
When correctly fitted, the plastic rib shown in the drawing below should not be
visible.
When correctly fitted, the plastic rib shown in the drawing below should not be
visible.
Insert the bottom locating pins of
the glass panel into the keyhole
slots on the TV.
the glass panel into the keyhole
slots on the TV.
While still maintaining forward
pressure to the bottom of the glass,
carefully slide the glass down until it
locks.
pressure to the bottom of the glass,
carefully slide the glass down until it
locks.
Locating pin
Plastic rib
- 20 -
GREEN
BLUE
RED
Purity
Purity control corrects
this area
this area
Disk magnets or
rotatable disk
magnets correct
these areas (a-d)
rotatable disk
magnets correct
these areas (a-d)
Deflection yoke positioning
corrects these areas
corrects these areas
a
c
d
b
Disk Magnets
Preparation:
1.
In order to reduce the influence of geomagnetism on the
set’s picture tube, face it in an easterly or westerly direction.
set’s picture tube, face it in an easterly or westerly direction.
2.
Switch on the set’s power and degauss with the degausser.
1.
Input an all white signal from the pattern generator. Set the
Contrast and Brightness to normal.
Contrast and Brightness to normal.
2.
Set the pattern generator raster signal to Red.
3.
Move the deflection yoke 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].
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].
4.
Move the deflection yoke backwards and adjust so that the
entire screen becomes Red. [See Fig.3-1]
entire screen becomes Red. [See Fig.3-1]
5.
Switch the raster signal to Blue, then to Green and verify
the condition.
the condition.
6.
When the position of the deflection yoke has been
determined, fasten the deflection yoke with the screws.
determined, fasten the deflection yoke with the screws.
7.
If the beam does not land correctly in all the corners, use a
magnet to correct it. [See Fig.3-4]
magnet to correct it. [See Fig.3-4]
•
When complete readjustment is necessary or a new picture
tube is installed, carry out the following adjustments.
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.
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 adjustments in the following order :
3-1.
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.
Caution :
High voltages are present on the Deflection yoke terminals
- take care when handling the Deflection yoke whilst carrying
out adjustments.
- take care when handling the Deflection yoke whilst carrying
out adjustments.
Fig.3-4
Fig. 3-1.
Fig. 3-3.
Fig. 3-2.
SECTION 3
SET-UP ADJUSTMENTS
3-1. Beam Landing
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