1982 Zenith System 3 Problems

[JohnCT]

Originally Posted by NowhereMan 1966

It did have a yellow label on it. I know with the old board, the TV might come on for a few minutes and shut off and if you try to turn in on, it would "motorboat" indicating a bad capacitor from my discussion here. It just seems perplexed that nothing happens, I guess I'll have to go over it again. I'll have to check around with my VOM with my SAMs folder in hand and see what's up.

If it's a yellow label and was sealed, it's likely good, even sitting in the box all these years.

First thing I would do is reinstall the original module and see if you can get back to where it was. If it acts dead like the new board, then something else happened coincidentally. If the original board runs with the shutdown and motorboating, pull that dual section PC mount electro and check it, or better yet just replace it. That cap causes all sorts of mischief including damaging the start transistors on that sub board I mentioned earlier.

On Zenith modules, the suffix is critical. I used to have all those boards memorized, but whereas a 9-181-01 might sub the 9-181, the 9-181-02 might not, but the -03 might!

Our local Zenith distributor (Plymouth Electric NH CT) used to mail us cheat sheets that had all the modules listed with the suffixes that would interchange. Saved a lot of time and trouble. All that stuff I tossed out twenty or more years ago.

John