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Spectrum
1.
With the VG91 Generator still connected to the tuner input and the oscilloscope to TP102
(Pin 38 of IC200), turn the set ON.
2.
Set the Generator as follows: Mode Switch set to L Ch., Audio Frequency set to 3kHz,
Stereo Pilot set for 100% NORM.
3.
Adjust Register 69 (AUD ALIGN 2) for a null reading on the oscilloscope.
4.
Repeat the Wide Band and Spectrum Adjustments several times to ensure the best
possible settings.
FOCUS ADJUSTMENTS
(Electrical and Optical)
Control Preset Positions
1.
Picture setting at mid-range.
2.
Sharpness setting at mid-range.
3.
Brightness setting at mid-range.
4.
Color setting at minimum.
5.
Tint setting at mid-range.
Electrical Focus
1.
With the set tuned to a crosshatch pattern, this adjustment can be made from the back of
the set (with the light shield removed). The pattern will appear clearer if the front of the
screen is covered with a dark cloth.
2.
Cover 2 of the CRT's Output Lenses with 7" X 7" pieces of cardboard.
3.
Observe the magnified reflections of the individual picture tubes on the back side of the
viewing screen.
4.
Adjust the respective focus controls (on the Screen/Focus control Block) for the sharpest
raster image.
5.
Confirm correct focus by viewing the screen from the front of the unit.
6.
Repeat steps 2 through 5 to focus the remaining two CRT's.
Optical Focus
1.
With the set tuned to a crosshatch pattern, this adjustment can be made from the back of
the set (with the light shield removed). The pattern will appear clearer if the front of the
screen is covered with a dark cloth.
2.
Cover 2 of the CRT Output Lenses with 7" X 7" pieces of cardboard.
3.
Loosen the lens retaining wing nuts on the CRT Output Lens and Housing Assembly.
4.
Move the wing nut in the slot of the uncovered Lens to locate the optimum optical focus
(viewing the picture from the back side of the screen), re-tighten the wing nut.
5.
Confirm correct focus by viewing the screen from the front of the unit.
6.
Repeat steps 2 through 5 to focus the remaining two CRTs.
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