Setup Adjustments; Beam Landing - Sony PVM-2530 Service Manual

PVM-2530
SECTION 3
SETUP ADJUSTMENTS
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.
13-1.
BEAM LANDING!
Preparation:
• Feed in the white pattern.
• Before starting, degauss the entire screen.
Perform the adjustments in order as follows:
1. Beam Landing
2. Convergence
3. SCREEN and White Balance
Note: Test Equipment Required.
I
I
I
1. Color-bar/Pattern Genertator
2. Degausser
RM-739
1. Loosen deflection yoke screw. i[p(qG~q
Fig. 3-2.
2. Position neck ass'y as shown in Fig. 3-1.
3. Adjust purity control as shown in Fig. 3-2.
4. Slide deflection yoke as far forward as it will
go.
5. Turn the raster signal of the pattern generator to
red.
6. Adjust purity control to center vertical red band
as shown in Fig. 3-3.
7. Slide deflection yoke back for a uniform red
screen.
8. Check green and blue rasters for uniformity by
performing the same way as steps 5 ,6 and 7.
9. Tighten the deflection yoke screw.
10. Check if mislandihg appears at corners a - d as
shown
in
Fig. 3-4. If mislanding is observed,
correct it as shown in Fig. 3-4.
11. Confirm that beam landing is correct when the
receiver is faced in all directions.
purity control
®
- 15 -
J '
G1 G3
Fig. 3-1.
Purity control corrects
this area.
BLUE
Fig. 3-3.
Disk magnets
or rotatable
disk magnets
correct these
areas (a-d).
Deflection yoke positioning
corrects these areas.
Fig. 3-4.
GREEN