Daewoo TVZ 1321, Service Manual

Page: 9 / 151

6
8-2. CONVERGENCE ADJUSTMENTS
NOTE : Before attempting any convergence adjustments,
the receiver should be operated for at least 15 min-
utes.
A. CENTER CONVERGENCE ADJUSTMENT
1) Receive crosshatch pattern with a crosshatch signal
generator.
2) Adjust the BRIGHTNESS and CONTRAST Controls for
a good picture.
3) Adjust two tabs of the 4-Pole Magnets to change the
angle between them (See Fig 3) and superimpose red
and blue vertical lines in the center area of the picture
screen. (See Fig. 4)
4) Turn both tabs at the same time keeping their angles
constant to superimpose red and blue horizontal lines at
the center of the screen. (See Fig. 4)
5) Adjust two tabs of 6-Pole Magnets to superimpose
red/blue line with green one. Adjusting the angle affects
the vertical lines and rotating both magnets affects the
horizontal lines.
6) Repeat adjustments 3) 4) 5) keeping in mind red, green
and blue movement, because 4-Pole Magnets and 6-
Pole Magnets interact and make dot movement com-
plex.
B. CIRCUMFERENCE CONVERGENCE ADJUSTMENT
NOTE : This adjustment requires Rubber Wedge Kit.
1) Loosen the clamping screw on the deflection yoke to
allow to yoke to tilt.
2) Place a wedge as shown on figure 2 temporarily. (Do not
remove cover paper on adhesive part of the wedge).
3) Tilt front of the deflection yoke up or down to obtain bet-
ter convergence in circumference. (See Fig. 4) Push the
mounter wedge into the space between picture and the
yoke to hold the yoke temporarily.
4) Place other wedge into bottom space and remove the
cover paper to stick.
5) Tilt front of the yoke right or left to obtain better conver-
gence in circumference. (See Fig. 4).
6) Hold the yoke position and put another wedge in either
upper space. Remove cover paper and stick the wedge
on picture tube to hold the yoke.
7) Detach the temporarily mounted wedge and put it in
another upper space. Stick it on picture tube to fix the
yoke.
8) After placing three wedges, recheck overall conver-
gence.
Tighten the screw firmly to hold the yoke tightly in place.
9) Stick 3 adhesive tapes on wedges as shown in figure 2.
Fig. 3
Fig. 4 Dot Movement Pattern