DOWNLOAD Sony KV-29LS30E Service Manual ↓ Size: 6.53 MB | Pages: 48 in PDF or view online for FREE

Model
KV-29LS30E
Pages
48
Size
6.53 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-29ls30e.pdf
Date

Sony KV-29LS30E Service Manual ▷ View online

13
Screw.
Release the 5 securing clips located at the side and front of the
chassis and slide the PWB clear of the bracket.
Place the A Board PWB in the position indicated to carry out
servicing.
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.
Screws
Remove the screw securing the PWB to the main bracket.
Clip.
2-5. A Board PWB Removal [ Step 2 ]
2-4. A Board PWB Removal [ Step 1 ]
2-7. Side Control Module Removal
2-6. Service Position
14
8
2
5
6
7
9
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
2-8. 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.
Release the EHT lead from its CRT support bracket.
3.
Unplug all interconnecting leads from the Deflection yoke,
degaussing coils, Rotation coil and CRT grounding strap.
4.
Remove the C Board from the CRT.
5.
Loosen the VM Block fixing screw and remove.
6.
Remove the chassis assembly.
7.
Loosen the Deflection yoke fixing screw and remove.
8.
Remove the Degaussing Coil holders.
9.
Place the set with the CRT face down on a cushion.
10. Unscrew the four CRT fixing screws [ located on each CRT
corner ] and remove the CRT.
11. Remove the Degaussing Coils.
Remove the CRT grounding strap and spring tentioners.
[Take care not to handle the CRT by the neck.]
3
4
1
10
15
Purity control corrects
this area
Disk magnets or
rotatable disk
magnets correct
these areas (a-d)
Deflection yoke positioning
corrects these areas
Disk Magnets
a
c
d
b
GREEN
BLUE
RED
Preparation:
1.
In order to reduce the influence of geomagnetism on the
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.
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].
4.
Move the deflection yoke backwards and adjust so that the
entire screen becomes Red. [See Fig.3-1]
5.
Switch the raster signal to Blue, then to Green and verify
the condition.
6.
When the position of the deflection yoke has been
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]
When complete readjustment is necessary or a new 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.
Unless there are specific instructions to the contrary, set the
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.
Beam Landing.
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.
Caution :
High voltages are present on the Deflection yoke terminals
- take care when handling the Deflection yoke whilst carrying
out adjustments.
Fig.3-4
Fig. 3-1.
Fig. 3-3.
Fig. 3-2.
Purity
SECTION 3
SET-UP ADJUSTMENTS
3-1. Beam Landing
16
4.
If the V.STAT magnet is moved in the direction of the (a)
and (b) arrows, the Red, Green and Blue points move as
indicated below.
1.
[Moving horizontally], adjust the H.STAT control so that
the Red, Green and Blue points are on top of each other at
the centre of the screen.
2.
[Moving vertically], adjust the V.STAT magnet so that the
Red, Green and Blue points are on top of each other at the
centre of the screen.
3.
If the H.STAT variable resistor is unable to bring the Red,
Green and Blue points together at the centre of the screen,
adjust the horizontal convergence with the H.STAT variable
resistor and the V.STAT magnet in the manner indicated
below.
[In this case, the H.STAT variable resistor and the V.STAT
magnet influence each other].
The movement of the magnets interact with each other and so
the respective dot position should be monitored while carrying
out this adjustment.
Use the H.STAT VR to adjust the Red, Green and Blue dots so
that they coincide at the centre of the screen
(by moving the dots in the horizontal direction).
G
B
R
G
B
R
G
B
R
G
B
R
G
B
R
G
B
R
3-2. Convergence
Operation of the BMC (Hexapole) magnet.
Preparation:
Before starting this adjustment, adjust the focus, horizontal
size and vertical size.
Minimize the Brightness setting.
Input a dot pattern from the pattern generator.
Horizontal and Vertical Static Convergence
Fig.3-5
Tilt the V.STAT magnet and adjust the static convergence by
opening or closing the V.STAT magnet.
B
G
R
B
G
R
a
a
b
b
a
b
B
G
R
a
a
B
G
R
b
b
B
G
R
a
b
R
G
B
b
a
Center dot
R
G
B
R
G
B
C Board
RV702 (H STAT)
H STAT Convergence
(on mount side)
H STAT
convergence 
control
V.STAT Vertical Static Magnet
Page of 48
Display

Click on the first or last page to see other KV-29LS30E service manuals if exist.