Quote:
Originally Posted by Blast
Tubejunke- sorry to hear you can't get yours working right.
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I keep hanging on to the set because it is in near new condition. With mostly stock original tubes, very little dust (even in the HV cage) and a VERY strong c.r.t., I would say my set was only used a few years. I have heard that they are super performers. Although evidently common I feel that if I could decifer the problem I would have a good "regular use" set.
For those who have not read all this repeat info my Zenith has very little to no vertical height and a volume adjustable hum for sound, with no evidence of a signal coming through. Thats the way it came home and an electrolytic and paper recap changed nothing.
There is new news!! Recently I found an open coil inside T4 called L4. T4 seems to be working between the 3rd IF(6dk6) and the Video Amp(6eb8). This info comes from a schematic from an Electronic Technician Circuit Digest which gives no values for these components. There is a green dot painted on the side of the part.
I guess this is where the difference is evident between the true troubleshooter with proper equipment and the "part replacer" with a VOM and a soldering iron. I consider myself as having a rudimentary knowledge of what goes on inside the old sets and I have had decent luck through the years getting old sets going again. Luckily for me, as with many of us, MANY problems are directly and simply related to bad caps and resistors.
Anyway, I doubt this little coil is causing all of the symptoms mentioned, however, it causes something to be wrong. We do know that. Probably no video (if I had vertical sweep to see). Seems like a while back I disconnected the vert. output trans. for a resistance check and found nothing odd. I wish I had a sub to pop in there to be sure. The hum for sound is perhaps a whole different ball of wax. Nothing getting hot that I can tell as evidence of a short somewhere.
So, I'm still hoping some of this info rings a bell in the mind of someone with some experience with these sets. I need the space too bad to keep housing a broken set, even if it looks really nice.