PURITY / CONVERGENCE ADJUSTMENT
PURITY ADJUSTMENT
1. | Demagnetize CRT with the demagnetizer. |
2. | Loosen the retainer screw of the deflection yoke. |
3. | Remove the wedges. |
4. | Input a green raster signal from the signal generator, and turn |
| the screen to green raster. |
W EDGE
CR T
DEFLECTION
YOKE
P
4 6
P / C
5. | Move the deflection yoke backward. |
6. | Bring the long lug of the purity magnets on the short lug and |
| position them horizontally. (Fig.2) |
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. |
9. | Insert the wedge to the top side of the deflection yoke so that it |
| will not move. |
10. | Input a crosshatch signal. |
11. | Verify that the screen is horizontal. |
12. | Input red and blue raster signals, and make sure that purity is |
| properly adjusted. |
MAGNETS
#P/C MAGNETS
P : PURITY MAGNET
4 : 4 POLES (convergence magnets)
6 : 6 POLES (convergence magnets)
Fig.1
PURITY MAGNETS
Long lug
Short lug
Bring the long lug over the short lug and position them horizontally.
Fig.2
(FRONT VIEW ) | GREEN RASTER |
|
CEN TER
Fig.3
No. 52025 | 29 |
