JVC AV-25PX
Manual de Servicio

AV-25PX

PURITY, CONVERGENCE ADJUSTMENT
PURITY ADJUSTMENT
1. Demagnetize CRT with the demagnetizer.
WEDGE DYNAMIC CONVERGENCE ADJUSTMENT

2. Loosen the retainer screw of the deflection yoke.
PURITY MAGNET(P)

3. Remove the wedges.

CRT
4. Input a green raster signal from the signal generator, and turn the screen to green raster. 46
CRT SOCKET PWB

5. Move the deflection yoke backward.

DEF. YOKE

P / C MAGNETS

6. Bring the long lug of the purity magnets on the short lug and position them horizontally. (Fig.2)

P/C MAGNETS P : PURITY MAGNET 4 : 4 POLES (convergence magnets) 6 : 6 POLES (convergence magnets) Fig.1

7. Adjust the gap between two lugs so that the GREEN RASTER will come into the center of the screen. (Fig.3)

8. Move the deflection yoke forward, and fix the position of the deflection yoke so that the whole screen will become green.
PURITY MAGNETS

9. Insert the wedge to the top side of the deflection yoke so that it will not move.

10. Input a crosshatch signal.
Short lug

11. Verify that the screen is horizontal.
Long lug

12. Input red and blue raster signals, and make sure that purity is properly adjusted.

Bring the long lug over the short lug and position them horizontally.

Fig.2

(FRONT VIEW)

GREEN RASTER

CENTER

Fig.3

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No.51752