Last post about my convergence

[Kamakiri]

Hope you folks don't mind, but I'm going to sticky this thread. I've almost given up on vintage color sets because I can't get convergence right, and this is a great reference for anyone working on this

[TinCanAlley]

Okay, I should have the 10x probe for the scope tomorrow. Here's a questions about testing the convergence board. I see in the Sams that each of the test points corresponds to a lead in the convergence socket. It would be much easier to test the leads if the socket were disconnected. That way I could touch the probe directly to each pin in the socket. That's where my question comes in. Is it okay to run the set with the convergence board disconnected. I know the convergence will be way off and there will be no power to the convergence magnets. Other than that, would I cause any damage to anything?

Thanks!

[DaveWM]

Originally Posted by TinCanAlley

Okay, I should have the 10x probe for the scope tomorrow. Here's a questions about testing the convergence board. I see in the Sams that each of the test points corresponds to a lead in the convergence socket. It would be much easier to test the leads if the socket were disconnected. That way I could touch the probe directly to each pin in the socket. That's where my question comes in. Is it okay to run the set with the convergence board disconnected. I know the convergence will be way off and there will be no power to the convergence magnets. Other than that, would I cause any damage to anything?

Thanks!

If it was a tube set I would think the worst thing would be a somewhat reduced vert scan, but since its a solid state set I would advise against it. Nothing worse that making matters worse while trying to make them better.

I suggest you figure a way to make contact solid, with the set off turn on note pattern then shut down for removal of test probs. Beside unless the sams says to disconnect then it would be assumed the reading were taken with the plug attached.

[TinCanAlley]

Originally Posted by DaveWM

If it was a tube set I would think the worst thing would be a somewhat reduced vert scan, but since its a solid state set I would advise against it. Nothing worse that making matters worse while trying to make them better.

I suggest you figure a way to make contact solid, with the set off turn on note pattern then shut down for removal of test probs. Beside unless the sams says to disconnect then it would be assumed the reading were taken with the plug attached.

Well I guess I can flip her on her side and remove the bottom cover. All of the test points are on the bottom side of the plug at the connector (after wave shapers, etc.). I'm sure they want that side for testing as they could have put the points on the schematic for the convergence board itself, but they didn't. Don't know if that because of less clutter at the plug end over the mess up on the convergence board.

I tried to slip the probe tip between the wire and plastic connector wall on the top side, but it's too tight. Maybe there will be more room on the bottom side of the connector. If not, then I'll follow the wires back to where they attach to the terminal strip.

[DaveWM]

on my stuff I can generally get to the test points at the convergence board, you put it in the service position to get to the back off it.

[andy]

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[TinCanAlley]

Originally Posted by andy

Can't you just probe the connections on the convergence panel itself?

Some points have too many leads from capacitors and resistors crisscrossing . It's a short waiting to happen.

I guess I could map out the terminal pins and attach the probe on those points. Those are on the front side of the board and less chance of shorting something out.

[colorfixer]

What about using the paper magnet strips they used on precision inline tubes to touch up the dynamic after the fact?