Zenith System 3 acting up

[Jon A.]

Originally Posted by TUD1

I watched the set again today with the Color Sentry ON, like I usually do, and the problem was not present. I wonder if it only happens when Color Sentry is OFF?

Not necessarily. As I re-cap my Electrohome, the random picture dimming problem hasn't yet gone away, it just happens more randomly. The "Auto" button often helps when it's at its worst.

Whatever the cause is, I'm going to be having a solder fest at the CRT neck board as part of the restoration.

[zeno]

IIRC the color sentry put the light sensor on & locked the color tint & contrast.
Again IIRC the presets are separate on these. Marked BL, T & C at the
customer controls. This is a Y line set & thats when they introed the
double sided control board on the cheap "Custom" series 9-181 sets so it
may have one.

CHROMATC turns off all the controls & turns on Auto Tint Guard. Controls
are through the center of the customer controls.
Yes I have seen a few noisy switches on those.

This set is a perfect candidate for tapping around lightly to find
the problem

73 Zeno
LFOD !