Set-Up Adjustments; Beam Landing Adjustment; Convergence Adjustment - Sony KV-SW14M50 Service Manual

The following adjustments should be made when a complete
realignment is required or a new picture tube is installed.
The controls and switch should be set as follows unless
otherwise noted:
Picture control ......................................................... NORMAL
Brightness control ................................................... NORMAL
...................................................................................................................................................................................................................... ...........
Preparation :
• Feed in the white pattern signal.
• Before starting, degauss the entire screen with the
degausser.
• In order to reduce the geomagnetism on the set's
picture tube, face it east or west.

2-1. BEAM LANDING ADJUSTMENT

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 below.
Purity control
3. Set the raster signal of the pattern generator to green.
4. Move the deflection yoke (DY) backward and adjust the
purity control so that green is in the center and blue and
red are at the sides evenly.
Red
5. Then move the DY forward and adjust so that the entire
screen becomes green.
6. Now switch over raster signal to red then blue and
confirm the condition.

SET-UP ADJUSTMENTS

Blue
Green
SECTION 2
Perform the adjustments in order as follows:
1. Beam Landing
2. Convergence
3. Focus
4. G2 (SCREEN)
5. White Balance
Note: Test Equipment Required
1. Pattern Generator
2. Degausser
3. DC Power Supply
4. Digital Multimeter
7. When the position of the DY is determined, tighten it
with the DY mounting screw.
8. If the beam does not land correctly in all corners of the
screen, use magnet disc to correct it.
Purity control
corrects this area.
Deflection yoke positioning
corrects these areas.
a
d

2-2. CONVERGENCE ADJUSTMENT

Preparation :
• Before starting, perform FOCUS adjustment.
• Picture mode STANDARD.
• Receive dot/cross hatch pattern.
a) Vertical Static Convergence
Center dot
R
– 7 –
KV-SW14M50/M51/M80/M90
5. Oscilloscope
6. Landing Checker
7. XCV Adjuster
Disc magnets or rotatable
disc magnets correct these
areas (a-d).
a
b
d
c
b
c
R
G
B
G B
4 pole magnet
C/CV Board
RM-GA002
RV750
H. STAT