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ELECTRICAL ADJUSTMENTS
4. PURITY AND CONVERGENCE
4-3: STATIC CONVERGENCE
ADJUSTMENTS
NOTE
NOTE
Adjust after performing adjustments in section 4-2.
1. Turn the unit on and let it warm up for at least 30
1. Receive the crosshatch pattern from the color bar
minutes before performing the following adjustments.
generator :
2. Place the CRT surface facing east or west to reduce the
2. Combine red and blue of the 3 color crosshatch pattern
terrestrial magnetism.
on the center of the screen by adjusting the pair of 4
3. Turn ON the unit and demagnetize with a Degauss Coil.
pole magnets.
3. Combine red/blue (magenta) and green by adjusting the
4-1: STATIC CONVERGENCE (ROUGH ADJUSTMENT)
pair of 6 pole magnets.
1. Tighten the screw for the magnet. Refer to the adjusted
CRT for the position. (Refer to Fig. 4-1)
4-4: DYNAMIC CONVERGENCE
If the deflection yoke and magnet are in one body,
NOTE
untighten the screw for the body.
2. Receive the green raster pattern from the color bar
Adjust after performing adjustments in section 4-3.
generator.
F
;
F
4. Adjust center of screen to green, with red and blue on
2. Insert three wedges between the deflection yoke and
the sides, using the pair of purity magnets.
CRT funnel to fix the deflection yoke.
5. Switch the color bar generator from the green raster
(Refer to Fig. 4-2-b)
pattern to the crosshatch pattern.
6. Combine red and blue of the 3 color crosshatch
RGB
pattern on the center of the screen by adjusting the pair
of 4 pole magnets.
7. Combine red/blue (magenta) and green by adjusting the
pair of 6 pole magnets.
8. Adjust the crosshatch pattern to change to white by
repeating steps 6 and 7.
eee PURITY.
UPWARD/DOWNWARD SLANT RIGHT/LEFT SLANT
NOTE
Fig. 4-2-a
Adjust after performing adjustments in section 4-1.
1. Receive the green raster pattern from color bar
generator.
2. Adjust the pair of purity magnets to center the color on
the screen.
Adjust the pair of purity magnets so the color at the
ends are equally wide.
3. Move the deflection yoke backward (to neck side)
slowly, and stop it at the position when the whole screen
is green.
4. Confirm red and blue colors.
5. Adjust the slant of the deflection yoke while watching
the screen, then tighten the fixing screw.
DEFLECTION YOKE SCREW
Fig. 4-2-b
MAGNET SCREW
6 POLE MAGNETS
4 POLE MAGNETS
PURITY MAGNETS
Fig. 4-1
D2-6
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