Read Sony KV-21M5D Service Manual online
14
•
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.
White balance
3-4.
Focus
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
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
Click on the first or last page to see other KV-21M5D service manuals if exist.