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4-3-6 Purity Adjustment
1. Warm up the receiver for at least 20 minutes.
2. Plug in the CRT deflection yoke and tighten
the clamp screw.
3. Plug the convergence yoke into the CRT and
set in as shown in Fig. 4-1.
4. Input a black and white signal.
5. Fully demagnetize the receive by applying an
external degaussing coil.
6. Turn the CONTRAST and BRIGHTNESS con-
trols to maximum.
6 Pole Magnet
Clamper
Screw
Samsung Electronics
4 Pole Magnet
2 Pole Magnet
Fig. 4 -1 Convergence Magnet Assembly
31m/m
Fig. 4-2 Center Convergence Adjustment
7. Loosen the clamp screw holding the yoke.
Slide the yoke backward or forward to pro-
vide vertical green belt. (Fig. 4-2).
8. Tighten the convergence yoke.
9. Slowly move the deflection yoke forward,
and adjust for the best overall green screen.
10. Temporarily tighten the deflection yoke.
11. Produce blue and red rasters by adjusting the
low-light controls. Check for good purity in
each field.
12. Tighten the deflection yoke.
2 POLE
PURITY
4 POLE
CONVERGENCE
Vertical Green Belt
Alignment and Adjustments
YOKE
CLAMP
SCREW
6 POLE
CONVERGENCE
ADJUST
(VERTICA
4-7
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