Read Sony KV-21FA240 Service Manual online
KV-21FA240
KV-21FA240
12
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.
Set the controls as follows unless otherwise noted:
Picture control
NORMAL
Brightness control NORMAL
SECTION 2: SET-UP ADJUSTMENTS
Perform the adjustments in order as follows:
1. Beam Landing
2. Convergence
3. Focus
4. Screen (G2)
5. White Balance
Note Test Equipment Required:
1. Color Bar Pattern Generator
2. Degausser
3. DC Power Supply
4. Digital Multimeter
2-1. BEAM LANDING
Before beginning adjustment procedure:
1. Feed in the white pattern signal.
2. In order to reduce the geomagnetism on the set’s picture tube, face
1. Feed in the white pattern signal.
2. In order to reduce the geomagnetism on the set’s picture tube, face
it east or west.
Adjustment Procedure
1. Input a raster signal with the pattern generator.
2. Loosen the deflection yoke mounting screw, and set the purity
2. Loosen the deflection yoke mounting screw, and set the purity
control to the center as shown below:
Purity control
3. Turn the raster signal of the pattern generator to green.
4. Move the deflection yoke backward, and adjust with the purity
4. Move the deflection yoke backward, and adjust with the purity
control so that green is in the center and red and blue are even on
both sides.
Red
Blue
Green
5. Move the deflection yoke forward, and adjust so that the entire
screen becomes green.
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. If landing at the corner is not right, adjust by using the disk
magnets.
Purity control
corrects this area.
Disc magnets or rotatable
disc magnets correct these
areas (a-d).
disc magnets correct these
areas (a-d).
Deflection yoke positioning
corrects these areas.
corrects these areas.
a
b
b
c
c
d
d
a
5. Oscilloscope
6. Landing Checker
7. XCV Adjuster
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