8. PURITY / CONVERGENCE ADJUSTMENT
Demagnetize CRT with the demagnetizer.
Loosen the retainer screw of the deflection yoke.
Remove the wedges.
Input a green raster signal from the signal generator,
and turn the screen to green raster.
Move the deflection yoke backward.
Bring the long lug of the purity magnets on the short
lug and position them horizontally. (Fig2)
Adjust the gap between two lugs so that the GREEN
RASTER will come into the center of the screen.
Move the deflection yoke forward, and fix the position
of the deflection yoke so that the whole screen will
Insert the wedge to the top side of the deflection
yoke so that it will not move.
Imput a crosshatch signal.
Verify that the screen is horizontal.
Input red and blue raster signals, and make sure that
purity is properly adjusted.
P: PURITY MAGNET
Bring the long lug over the short lug
and position them horizontally.