Fixing Zenith CCII Avante 25JC49

[drwatson32]

Hey Tom, thanks in advance for checking, whenever you do find a moment. This one does have zoom, but at least visually, this non-zoom model seems to have the same magnets- https://www.videokarma.org/showthread.php?t=265234

[Electronic M]

Ok I've got 2 different upright chassis Zenith CCII convergence boards.
This 3 wire that came out of a working set that I want $20 plus shipping for.
IMG_20250709_180931626 by Tom Carlson, on Flickr

And this 5 wire that is missing an adjustable slug tuned transformer a couple of the pot knobs, and has a chipped loose board corner on the top left where the top of that power resistor goes. It came out of a non-working parts set and I want $12 plus shipping for it .
IMG_20250709_181055375 by Tom Carlson, on Flickr

[drwatson32]

Thanks for checking, Tom. Both styles of magnet appear to have the same part #, but the first one, with 3 wires, has the same style that I have; I'm definitely interested. I tried to send a PM to work out details, but it said your inbox is full.

[Electronic M]

You can email me if you click on my username. If you send me your zip code I can find a box and get a shipping quote.

[drwatson32]

Originally Posted by Electronic M

You can email me if you click on my username. If you send me your zip code I can find a box and get a shipping quote.

I sent over an email (I think) There wasn't any feedback from the forum software, but maybe that's typical.

[Doug]

You have to inquire to
https://chesterelectronics.com/

https://www.moyerelectronics.com/
Doug

[vol.2]

Originally Posted by Doug

You have to inquire to
https://chesterelectronics.com/

https://www.moyerelectronics.com/
Doug

It's sad how the NTE cross reference embed just doesn't resolve anymore.

[Electronic M]

I've got your email. I need to find a box and visit a post office.

[Electronic M]

Quote received and email sent.

[drwatson32]

I've been unable to reply back to this since the site has been down, but thanks Tom!

It turned out that my main problem with the convergence board was that when I replaced the resistors, I used a 47k in place of a 47ohm resistor, which provides the ground to the controls that weren't working (I realized this because the controls worked when in zoom mode... zoom provides a different path to ground) I DID need a couple of the magnets from Tom's neck board though. I was able to get everything dialed in pretty nicely, enough that I was content with it.

My wife helped me move the set to the other side of the room, at which point the color purity was distorted, figures lol. I've lived with that for a couple of months, until just recently, color will drop out. Sometimes it'll come back if I power off and back on again. I've cleaned and checked the adjustment pots on the 9-86 chroma subcarrier board, checked that the oscillator is working with a scope, verified voltages. Adjustments of these pots don't seem to have any bearing on color loss, neither does fine tuning the tuner. I put in an order for a replacement board on ebay; it was cheap enough that I don't mind just changing it out to see what we get.

Aside from that, I'm really just looking at finding or making the missing pedestal now

[Electronic M]

One thing to watch out for is the little individual 100uF 50V axial lytics on the chassis. They rot open with age and can mess with various things including color in interesting ways. I had one that leaked and one of the leads rotted off. One side of the picture was exaggerated Technicolor and the other was stark monochrome because of that cap....This was on a flat chassis set.