Are These Circuit Traces Bad

[Findm-Keepm]

Originally Posted by TinCanAlley

Thanks. The part # is: 121-755

I bought these off ebay and they were noted as being NOS. They sure don't look used and are a newer cream colored board instead of the old brownish (I'm so bad with any color other than primaries). The boards are the updated versions of the originals, but they can't be much newer as they also have plug in transistors.

Zenith may have had a second production run, as many shops ordered modules but failed to turn in duds. I remember PTS and others would issue a hotlist if modules they would buy at the dud price, to develop sufficient stock. Zenith System 3 modules were that way in the early 80s - some modules were backordered to the factory to get replacements. We fixed all of ours, so we never swapped anything but tuners and tuner controls. Duramodules (the Zenith term for your module) were exchanged, as the modules were cheap, and Time-to-repair was greater.

I'll check in the morning and see if I have your transistor.

Cheers,