10-2. CONVERGENCE ADJUSTMENTSB. CIRCUMFERENCE CONVERGENCE ADJUSTMENT
NOTE: Before attempting any purity adjustments, theNOTE: This adjustment requires Rubber Wedge Kit.
receiver should be operated for at least 151) Loosen the clamping screw on deflection yoke to allow
minutes.the yoke to tilt.
A. CENTER CONVERGENCE ADJUSTMENT
2) Place a wedge as shown in figure 2 temporarily. (Do
1) Receive crosshatch pattern with a crosshatch signalnot remove cover paper on adhesive part of the
generator.wedge.)
2) Adjust the BRIGHTNESS and CONTRAST Controls for3) Tilt front of the deflection yoke up or down to obtain
a good picture.better convergence in circumference. (See Fig. 4) Push
the mounting wedge into the space between picture
3) Adjust two tabs of the 4-Pole Magnets to change the
and the yoke to hold the yoke temporarily.
angle between them (See Fig. 3) and superimpose red
and blue vertical lines in the center area of the picture4) Place other wedge into bottom space and remove the
screen. (See Fig. 4)cover paper to stick.
4) Turn both tabs at the same time keeping their angles5) Tilt front of the yoke right or left to obtain better
constant to superimpose red and blue horizontal linesconvergence in cicumference. (See Fig. 4)
at the center of the screen. (See Fig. 4)6) Hold the yoke position and put another wedge in either
5) Adjust two tabs of 6-Pole Magnets to superimposeupper space. Remove cover paper and stick the wedge
red/blue line with green on top of each other. Adjustingon picture tube to hold the yoke.
the angle affects the vertical lines and rotating both7) Detach the temporarily mounted wedge and put it in
magnets affects the horizontal lines.another upper space. Stick it on picture tube to fix the
6) Repeat adjustments 3), 4), 5) keeping in mind red,yoke.
green and blue movement, because 4-Pole Magnets8) After placing three wedges, re-check overall
and 6-Pole Magnets interact and make dot movementconvergence. Tighten the screw firmly to hold the yoke
complex.tightly in place.
9) Stick 3 adhesive tapes on wedges as shown in figur32.
4-POLE
MAGNETS
CONSTANT
4DJUST THE
PURITYANGLE
MAGNETS
(VERTICAL
LINES)
ROTATE TWO TABS AT
THE SAME TIME
(HORIZONTAL LINES)
CONVERGENCE MAGNET ASSEMBLY
ADJUSTMENT OF MAGNET
Fig. 3
BLUEREDRED/BLUEGRN
B G RB
G
RBGR
BLUERED/BLUERB
GG
REDGRNBR
BGRR
G
R G BB
4-Pole Magnets Movement6-Pole Magnets Movement Incline the Yoke up(or down) Incline the Yoke right(or left)
Center Convergence by Convergence MagnetsCircumference Convergence by DEF. Yoke
Fig. 4 Dot Movement Pattern
12 |
ACEC
