Sanyo CP21XS2 Service Manual page 18

Purity and Convergence Adjustment
CONVERGENCE ADJUSTMENT
Preparation: After carrying out purity adjustment and
before proceeding to convergence
adjustment, provisionally insert the rubber
wedge so that there is no vertical or
sideways play in the deflection yoke.
Signals: Display a crosshatch pattern.
1. Red/blue center adjustment
Adjust the angle between the tabs (1) and (2) in Figure
5 and rotate them together until the lines of the red and
blue crosshatch patterns (vertical and horizontal lines)
are superimposed in the center of the screen.
2. Green and red/blue center adjustment
Adjust the angle between the tabs (3) and (4) in Figure
5 and rotate them together until the lines of the green
crosshatch pattern are superimposed with the red/blue
crosshatch pattern (vertical and horizontal lines) which
were superimposed in step 1).
3. Vertical lines at screen bottom center (Red and Blue)
Use the YH control (see Figure 8) at the top of the deflection
yoke to correct the vertical line convergence at the top and
bottom center of the screen.(See Figure 9.)
4. Vertical lines at screen center (Red and Blue)
Use the YHC control (see Figure 8) at the top of the
deflection yoke to correct the vertical line convergence
at the center of the screen.(See Figure 10.)
5. Horizontal lines at screen top and bottom
Use the YV control (see Figure 8) at the top of the deflection
yoke to correct the horizontal line convergence at the top and
bottom of the screen. (See Figure 11.)
If horizontal lines are intersecting at the top and bottom, use a
screwdriver to adjust the Balance coil at the top of the deflec-
tion yoke. (See Figure 12.)
Figure 8
YHC
YV
Balance
YH
coil
Figure 5
FOUR-POLE
MAGNET TABS
ANGLE
OF TABS
PURITY
MAGNET
TABS
Figure 6
Red
Blue
Figure 7
Red/Blue
Green
Figure 9
Red
Blue
Red Blue
Figure 10
Blue
Red
Figure 11
Figure 12
-18-
SIX-POLE
MAGNET TABS
3
Adjust the angle rotation of tabs
(1) and (2) to align the vertical
and horizontal lines.
Adjust the angle and rotation of
tabs (3) and (4) to align the vertical
and horizontal lines.
Use the YH control to correct.
Use the YHC control to correct.
Red
Blue
Use the YV control to correct.
Red
Use the Balance coil to correct
Blue