Set-Up Adjustments; Beam Landing - Sony KV-29AL40 Service Manual

KV-29AL40/KV-29AL40A/KV-29AL40C
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.
The controls and switch should be set as follows unless
otherwise noted:
PICTURE control ................. normal
BRIGHTNESS control ......... normal

3-1. BEAM LANDING

Preparation:
• Feed in the white pattern signal.
• Before starting, degauss the entire screen.
1. Input a raster signal with the pattern generator.
2. Loosen the deflection yoke mounting screw, and set the purity
control to the center as shown in Fig.2.
3. Turn the raster signal of the pattern generator to green.
4. Move the deflection yoke backward, and adjust with the purity
control so that green is in the center and red and blue are at the
sides evenly. (Fig.3)
5. Move the deflection yoke forward, and adjust so that the entire
screen becomes green. (Fig.1)
6. Switch over the raster signal to red and blue and confirm the
condition.
7. When the position of the deflection yoke is determined, tighten
it with the deflection yoke mounting screw.
8. When landing at the corner is not right, adjust by using the disk
magnets. (Fig.4)

SET-UP ADJUSTMENTS

Fig. 1
SECTION 3
Perform the adjustments in order as follows:
1. Beam Landing
2. Convergence
3. Focus
4. Screen (G2) and White Balance
Note: Test Equipment Required
1. Color Bar Pattern Generator
2. Degausser
3. DC Power Supply
4. Digital Multimeter
Purity control
corrects this area.
Deflection yoke positioning
corrects these areas.
—
14 —
Purity Control
Fig. 2
Blue Red
Green
Fig. 3
Disk magnets or
b a
rotatable disk
magnets correct
c d
these areas(a-d).
b
c
a
d
Fig. 4