AV-14F703
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 30 minutes1.Receive the crosshatch pattern from the color bar genera-
before performing the following adjustments.tor.
2.Place the CRT surface facing east or west to reduce the2.Combine red and blue of the 3 color crosshatch
terrestrial magnetism.pattern 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.Combine red/blue (magenta) and green by adjusting the
3-1: STATIC CONVERGENCE (ROUGH ADJUSTMENT)pair of 6 pole magnets.
1.Tighten the screw for the magnet. Refer to the adjusted
3-4: DYNAMIC CONVERGENCE
CRT for the position. (Refer to Fig. 3-1)
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
3.Slide the deflection yoke until it touches the funnel side ofdeflection yoke upward/downward and right/left.
the CRT.(Refer to Fig. 3-2-a)
4.Adjust center of screen to green, with red and blue on the2.Insert three wedges between the deflection yoke and CRT
sides, using the pair of purity magnets.funnel to fix the deflection yoke.
5.Switch the color bar generator from the green raster(Refer to Fig. 3-2-b)
pattern to the crosshatch pattern.
R G BR G B
6.Combine red and blue of the 3 color crosshatch
pattern on the center of the screen by adjusting the pair of
4 pole magnets.R
7.Combine red/blue (magenta) and green by adjusting theG
pair of 6 pole magnets.B
R
8.Adjust the crosshatch pattern to change to white by
G
repeating steps 6 and 7.B
UPWARD/DOWNWARD SLANT RIGHT/LEFT SLANT
3-2: PURITY
Fig. 3-2-a
NOTE
Adjust after performing adjustments in section 3-1.
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 endsWEDGEWEDGE
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 color.
5.Adjust the slant of the deflection yoke while watching theWEDGE
screen, then tighten the fixing screw.
WEDGE POSITION
DEFLECTION YOKE
DEFLECTION YOKE SCREWFig. 3-2-b
MAGNET SCREW
6 POLE MAGNETS
4 POLE MAGNETS
PURITY MAGNETS
Fig. 3-1
12No. 52002 |
ACEC
JVC
