On the bench: Zenith color roundie 25MC30

[oldtvman]

Originally Posted by Kamakiri

It's in the correct position, that was my first thought. I'd be further inclined to test the switch, were it not for the very noticeable "ticking" noise.

I do have a changer in a mid 60's rca home entertainment center, I'll look and see what model it it.

[Kamakiri]

Well, this set is now back in my possession from a trade deal

So here's where I'm at.....

Now that it's got a new yoke (installed by Preston), it's got a picture, but it's rolled up at the bottom. Picture shows it with the vertical size absolutely maxed, and it still won't go to the bottom of the screen.

Now, before I go any further, he gave me the old yoke back in the box, along with this paperwork which was included in it. I'm thinking that this yoke has to be modified somehow to work in this set, but I'm not wholly sure anything was, or how to do it if it does need to be done.

Take a gander, I've scanned the paperwork in. Suggestions are appreciated

[ChrisW6ATV]

Originally Posted by Kamakiri

Take a gander, I've scanned the paperwork in. Suggestions are appreciated

Tim, from what I can see in the instructions, you need to look at the original yoke (if you have it) and/or the schematic for the Zenith set, and remove (or add?) parts to make the new yoke match what the old one has. The schematic of the new one is in the one page you posted. Other may have a better way to describe this. I have not worked on any Zenith color sets, though.

[DaveWM]

I doubt its the yoke, I would take a look at the PP drive signal, and/or voltages in the vert circuit. This is another place the TV analyst comes into play, a good source for a Known vert drive.