Set-Up Adjustments; Beam Landing - Sony KV-36FS12 Service Manual

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
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:
• Input a white pattern signal.
• Face the picture tube in an East or West direction to reduce
the influence of geomagnetism.
NOTE: Do not use the hand degausser because it magnetizes
the CRT .
1. Input white pattern from pattern generator.
2. Loosen the deflection yoke mounting screw, and set the
purity control to the center as shown below:
3. Input green pattern from pattern generator.
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.
Blue
Green
5. Move the deflection yoke forward, and adjust so that the
entire screen becomes green.
SECTION 3

SET-UP ADJUSTMENTS

power
Red
—
KV-36FS12/36FS16/36FV16/36FV26
Perform the adjustments in order as follows:
1. Beam Landing
2. Convergence
3. Focus
4. Screen (G2)/White Balance
Note: Test Equipment Required:
1. Color Bar Pattern Generator
2. Degausser
3. DC Power Supply
4. Digital Multimeter
5. Oscilloscope
6. CRT Analyzer
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.
Disk magnets
or rotatable disk
magnets correct
these areas (a-d)
Deflection yoke positioning
b
d
—
15
Purity control
corrects this area
a b
c d
corrects these areas
a
c