Set-Up Adjustments; Beam Landing - Sony KV-EF29N6A Service Manual

更多难得资料请到江南家电维修论坛免费下载！
http://bbs.520101.com
KV-EF29N6A/EF29N6B/EF29N9P
•
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.
Controls and switch should be set as follows unless otherwise
noted:
PICTURE control .......................................................... RESET
BRIGHTNESS control ............................................... CENTER
.........................................................................................................................................................................................................................
Preparations :
•
In order to reduce the influence of geomagnetism on the set's
picture tube, face it east or west.
•
Switch on the set's power and degauss with the degausser.

3-1. BEAM LANDING

1. Input a white signal with the pattern generator.

Contrast

normal

Brightness
2. Position neck ass'y as shown in Fig3-2.
3. Set the pattern generator raster signal to a red raster.
4. Move the deflection yoke to the rear and adjust with the purity
control so that the red is at the center and the blue and the
green take up equally sized areas on each side.
(See Figures 3-1 through 3-3.)
5. Move the deflection yoke forward and adjust so that the entire
screen is red. (See Figure 3-1.)
6. Switch the raster signal to blue, then to green and verify the
condition.
7. When the position of the deflection yoke has been decided,
fasten the deflection yoke with the screws and DY spacers.
8. If the beam does not land correctly in all the corners, use a
magnet to adjust it.
(See Figure 3-4.)
SECTION 3
RM-882

SET-UP ADJUSTMENTS

Fig. 3-1
Perform the adjustments in order as follows :
1. Beam Landing
2. Convergence
3. Focus
4. White Balance
Note : Test Equipment Required.
1. Color-bar/Pattern Generator
2. Degausser
3. Oscilloscope
Neck assy
G1 G2
Blue
Red
Green
Purity control
corrects this area.
b a
c d
Deflection yoke positioning
corrects these areas.
a
d
– 24 –
Behind the G2 edge
Fig. 3-2
G3
Fig. 3-3
Disk magnets or rotatable
disk magnets correct these
areas (a-b).
b
c
Fig. 3-4