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SECTION 3
SET-UP ADJUSTMENTS
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normal
Fig. 3-1
G2
G1
G3
Behind the G1 edge
Neck assy
Fig. 3-2
Green
Red
Blue
Fig. 3-3
Disk magnets or rotatable
disk magnets correct these
areas (a-b).
disk magnets correct these
areas (a-b).
a
b
c
d
c
b
a
d
Deflection yoke positioning
corrects these areas.
corrects these areas.
Fig. 3-4
•
The following adjustments should be made when a complete
realignment is required or a new picture tube is installed.
•
These adjustments should be performed with rated power
supply voltage unless otherwise noted.
Controls and switch should be set as follows unless otherwise noted:
PICTURE control .......................................................... RESET
BRIGHTNESS control ............................................... CENTER
Preparations :
•
In order to reduce the influence of geomagnetism on the set's
picture tube, face it east or west.
•
Switch on the set's power and degauss with the degausser.
3-1. BEAM LANDING
1. Input a white signal with the pattern generator.
Contrast
Brightness
2. Position neck ass'y as shown in Fig3-2.
3. Set the pattern generator raster signal to a red raster.
4. Move the deflection yoke to the rear and adjust with the purity
control so that the red is at the center and the blue and the green
take up equally sized areas on each side.
(See Figures 3-1 through 3-3.)
5. Move the deflection yoke forward and adjust so that the entire
screen is red. (See Figure 3-1.)
6. Switch the raster signal to blue, then to green and verify the
condition.
7. When the position of the deflection yoke has been decided,
fasten the deflection yoke with the screws and DY spacers.
8. If the beam does not land correctly in all the corners, use a
magnet to adjust it.
(See Figure 3-4.)
Perform the adjustments in order as follows :
1. Beam Landing
2. Convergence
3. Focus
4. White Balance
Note : Test Equipment Required.
1. Color-bar/Pattern Generator
2. Degausser
3. Oscilloscope
Purity control
corrects this area.
corrects this area.
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