ELECTRICAL ADJUSTMENTS
3.PURITY AND CONVERGENCE3-3: STATIC CONVERGENCE
ADJUSTMENTSNOTE
NOTEAdjust after performing adjustments in section 3-2.
1.Turn the unit on and let it warm up for at least 301.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 the2.Combine red and blue of the 3 color crosshatch pattern
terrestrial magnetism.on the center of the screen by adjusting the pair of
3.Turn ON the unit and demagnetize with a Degauss Coil.4 pole magnets.
3-1: STATIC CONVERGENCE (ROUGH ADJUSTMENT)3.Combine red/blue (magenta) and green by adjusting the
pair of 6 pole magnets.
1.Tighten the screw for the magnet. Refer to the adjusted
CRT for the position. (Refer to Fig. 3-1)3-4: DYNAMIC CONVERGENCE
If the deflection yoke and magnet are in one body,NOTE
untighten the screw for the body.Adjust after performing adjustments in section 3-3.
2.Receive the green raster pattern from the color bar
generator.1.Adjust the differences around the screen by moving
the deflection yoke upward/downward and right/left.
3.Slide the deflection yoke until it touches the funnel(Refer to Fig. 3-2-a)
side of the CRT.
4.Adjust center of screen to green, with red and blue on the2.Insert three wedges between the deflection yoke and
sides, using the pair of purity magnets.CRT funnel to fix the deflection yoke.
(Refer to Fig. 3-2-b)
5.Switch the color bar generator from the green raster
pattern to the crosshatch pattern.
6.Combine red and blue of the 3 color crosshatch patternR G BR G B
on the center of the screen by adjusting the pair of
4 pole magnets.R
7.Combine red/blue (magenta) and green by adjusting the
pair of 6 pole magnets.G
8.Adjust the crosshatch pattern to change to whiteBR
by repeating steps 6 and 7.G
3-2: PURITYB
NOTEUPWARD/DOWNWARD SLANT RIGHT/LEFT SLANT
Adjust after performing adjustments in section 3-1.Fig. 3-2-a
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.WEDGEWEDGE
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
WEDGE
screen, then tighten the fixing screw.
DEFLECTION YOKE
WEDGE POSITION
DEFLECTION YOKE SCREW
MAGNET SCREWFig. 3-2-b
PURITY MAGNETS
6 POLE MAGNETS
4 POLE MAGNETS
Fig. 3-1
D-4 |
ACEC
