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5-4 RF AGC Adjustment
1. Tune to the strongest local station. -
2 POLE
PURITY
4 Pole Magnet
2. Turn the AGC control fully clockwise (VR111, on the IF board).
3. Adjust the AGC control until noise (snow) disappears from the
screen.
5-5 FOCUS Adjustment
1. Inputa
black and white signal.
2. Adjust the tuning control for clearest picture.
6 POLE
CONVERGENCE
5-6 SCREEN Adjustment
1. Turn to the ACTIVE channel.
Fig. 5 -1 Convergence Magnet Assembly
2. Adjust the VR screen for a normal picture is (no blooming or flyback line).
Vertical Green Belt
3. Adjust the SCREEN contro! for well defined scanning lines in the center area of the screen.
5-7 Purity Adjustment
Warm up the receiver for at least 20 minutes.
2. Plug in the CRT deflection yoke. Tighten the
clamp screw.
3. Plug the convergence yoke into the CRT and
set it as shown in Fig. 5-1.
4. Input a black and white signal.
7. Loosen the clamp screw holding the yoke.
Slide the yoke backward or forward to
produce a vertical green belt. (Fig. 5-2).
8. Tighten the convergence yoke.
9. Slowly move the deflection yoke forward.
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.
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