Beautiful - RCA Victor 621TS

[M3-SRT8]

She's up and running. Has audio has a raster but looks like the horizontal frequency is off. I can't find the hor.frequency control like in my 630TS.

Anybody know...?

[M3-SRT8]

Here's a pic of it running.

[Eric H]

Not positive but I think this is the Horiz Osc coil.

[M3-SRT8]

That's L113, the horizontal linearity control. I saw that.

[M3-SRT8]

I think the problem is not horizontal synch or oscillation. It might be in the tuner.

I don't get a blank white raster on the screen. There's lots of dark in it, with or without a signal going through it.

[ChrisW6ATV]

Originally Posted by M3-SRT8

They are about the same tone.

OK, so I cannot use that as a way to tell either. Well, maybe mine IS walnut, then. Every time I try to compare it to other sets I have or look at it in different light or a different angle, I see something that makes me not sure one way or the other. Thanks.

[Eric H]

The picture you posted looks like the Horiz Oscillator is running way off frequency but maybe it's just lines of interference?

Does the Horiz Hold control on the front have any affect?

It's been so long since I worked on a 621/721 I can't remember if they have an adjustable frequency coil or not, I would think they would have to.
Looking at the Riders on the ETF I can see a Horiz Osc Transformer but it doesn't appear to be adjustable.

[M3-SRT8]

Yup. I see the same thing. No adjustment.

I checked the 470 pf mica under the 6SN7-GT V-108, and it measures fine. Don't have a leak tester though. A 470k resistor measured 617k so I replaced it - nothing.

It may not be a horizontal oscillator or discharge issue.

Perhaps it's in the tuner. But I get real clear audio via the test DVD.

I'll keep at it.

[decojoe67]

Your 621TS is one of the nicest I've seen. Still the best vintage TV in my opinion. My only complaint with it, as well as my 630TS, is the annoying audio buzz they all seem to have. The audio also requires a very specific "sweet-spot" of the controls or it goes out completely.

[M3-SRT8]

Yup. A fine television.

I'm still making my way thru it. Just replaced all the 2W resistors in the HV section. They were all toast.

The Focus control is dirty, or catching on something, as it reads too high. Before I started cleaning it, it was reading only 1.87 Meg's. Now, it reads over 7 Meg's. Strange. I have it soaking in a cleaning solution, with the cover removed, at present. I may have to replace it.

Many thanks to kbmuri, who is, as usual, invaluable in endevours like these.

[M3-SRT8]

From the D.P. Gumby restoration dept:

Whilst checking voltages in the 5V4-G, I fried my Velleman VM890 DMM. This, of course, is not recommended.

A new Fluke 87-V is en-route. Happy Birthday, to Me.

[Eric H]

Originally Posted by M3-SRT8

From the D.P. Gumby restoration dept:

Whilst checking voltages in the 5V4-G, I fried my Velleman VM890 DMM. This, of course, is not recommended.

Bummer, this is why I'm now using a $20 Harbor Freight meter, don't care if it gets fried.

[M3-SRT8]

Originally Posted by Eric H

Bummer, this is why I'm now using a $20 Harbor Freight meter, don't care if it gets fried.

Oh, yeah. I have some of those Harbor Freight cheapies.

They are the electronic equivalent of Soviet Straff (Punishment) Battalion soldiers being thrown into the fray.

Zhukov to Rossokovski: "How many matches did you light today?"

[M3-SRT8]

Back on the 621. While checking around V105, 1st & 2nd Video Amp, I think I caught a recap boo boo.

Stand by. I think I'm close...

[DavGoodlin]

Originally Posted by M3-SRT8

Oh, yeah. I have some of those Harbor Freight cheapies.

They are the electronic equivalent of Soviet Straff (Punishment) Battalion soldiers being thrown into the fray.

Zhukov to Rossokovski: "How many matches did you light today?"

Ha