Beam Landing - Sony KV-20V50 Service Manual

a complete realignment is required or a new
picture tube is installed.
rated power supply voltage unless otherwise noted.
The controls and switch should be set as follows unless
otherwise noted :
PICTURE control--..-....-.....
BRIGHTNESS control. -. normal
Preparation:
l
Before starting, degauss the entire screen.
3-l. BEAM LANDING
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)
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)
Fig.1
SECTION 3
SET-UP ADJUSTMENTS
normal
- 2 3 -
Perform the adjustments i; order as follows:

1. Beam Landing

2. Convergence
Focus
3.
4. Screen (G 2) and White Balance
Test Equipment Required.
Note:
1. Color bar Pattern Generator
2. Degausser
3. DC Power Supply
4. Digital multimeter
purity
Fig.2
Fig.3
Purity control
corrects this area.
p
Fig.4
control
Disk magnets or
rotatable disk