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Here's what Sams says:
"Tune is a B&W picture or a color one with the color control at minimum. Set CRT bias and all screens to minimum, and put the switch into the service position. Advance screen controls one at a time, until each produces a barely visible line.
If one or more screen control fails to produce a line, leave that screen at max and advance CRT bias until a dim line appears. Then adjust the remining screens to match the brightness of that line. Put the switch back into the normal position. Adjust blue and green drives to eliminate coloring in high and lowlight areas."
FWIW mine seems to track perfectly, but the pots in this cheap chassis are horrible. In particular, the AGC pot is really bad. It causes the screen to flicker randomly, and the front panel pots could use a cleaning as well. Have you tried cleaning your pots yet?
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Evolution...
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