#31
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While I know perfect isn't possible, those lines should be closer together. I should have the replacements here and installed by next Monday (hopefully).
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Pioneer SX-1080, Pioneer PL-115D, Pioneer CT-F9191, Pioneer RG-1, Wollensak 8050A, Akai 4000DS MkII, Pioneer CS-05 & Polk 1.2TL Denon 5803A, Pioneer DVL-700, Pioneer CT-W603RS, Toshiba HD-A3, D-Link DSM-520, Dish VIP-722, Polk 1.2TL, CSi5, LS/fx, RT-800 and PSW-650 |
#32
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not that far off.you can tweak some more and maybe move purity rings very slightly to pull it a little closer.the blue horizontal could move a little more north.i know how this is.you want it perfect.tweak it some more just in those areas but it looks much better than it did and is close enough to enjoy.great progress.set looks good.now some screen shots,please?
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#33
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Like I said, I'll wait until the new coil and pot arrive. Until then I'm going to let the convergence be and enjoy what I have for the moment.
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Pioneer SX-1080, Pioneer PL-115D, Pioneer CT-F9191, Pioneer RG-1, Wollensak 8050A, Akai 4000DS MkII, Pioneer CS-05 & Polk 1.2TL Denon 5803A, Pioneer DVL-700, Pioneer CT-W603RS, Toshiba HD-A3, D-Link DSM-520, Dish VIP-722, Polk 1.2TL, CSi5, LS/fx, RT-800 and PSW-650 |
#34
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when you were checking those pots remember some of them may not test right in circuit. You would have to look at the schematic to see if they are isolated.
sometimes you have to comprimise the dynamic convergence, get one side perfect and the other is off a lot, in that case you shoot for the same defect on both sides. How much is normal and how much is a defect in a part can be hard to say. Just remember the idea behind dynamic convergence is to get the lines straight if thats done then it should be pretty close when the static is right on. there was a post in the early color where a member (6GH8 cowboy IIRC) was having some convergence issues and it was bad caps. If I was have problems I would break out the scope and see if I could see the needed waveforms going to the coils. if they are there then it clear the parts as an issue so just focus on correct setup. Make sure you have all the neck parts in the correct position. Last edited by DaveWM; 08-27-2013 at 12:54 PM. |
#35
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The one pot that tested oddly also had a click that sounded like a wire might have come unwound or something and was clicking as the wiper pushed it over. You could even feel it in your fingers. The coil is a given as it's seized. I'm pretty certain you can't lube the core of them. They seem pretty porous and I'm sure it would ruin the core.
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Pioneer SX-1080, Pioneer PL-115D, Pioneer CT-F9191, Pioneer RG-1, Wollensak 8050A, Akai 4000DS MkII, Pioneer CS-05 & Polk 1.2TL Denon 5803A, Pioneer DVL-700, Pioneer CT-W603RS, Toshiba HD-A3, D-Link DSM-520, Dish VIP-722, Polk 1.2TL, CSi5, LS/fx, RT-800 and PSW-650 |
Audiokarma |
#36
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smoothly working pots is a def plus. the zenith coils (if they are the plastic ones) can be a real PITA as the plastic crystalizes.
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#37
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Yeah, I noticed the pots and coils run around 100 degrees and that has to take it's toll on the plastic coils.
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Pioneer SX-1080, Pioneer PL-115D, Pioneer CT-F9191, Pioneer RG-1, Wollensak 8050A, Akai 4000DS MkII, Pioneer CS-05 & Polk 1.2TL Denon 5803A, Pioneer DVL-700, Pioneer CT-W603RS, Toshiba HD-A3, D-Link DSM-520, Dish VIP-722, Polk 1.2TL, CSi5, LS/fx, RT-800 and PSW-650 |
#38
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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
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"Restoring a tube TV is like going to war. A color one is like a land war in Asia." |
#39
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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!
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Pioneer SX-1080, Pioneer PL-115D, Pioneer CT-F9191, Pioneer RG-1, Wollensak 8050A, Akai 4000DS MkII, Pioneer CS-05 & Polk 1.2TL Denon 5803A, Pioneer DVL-700, Pioneer CT-W603RS, Toshiba HD-A3, D-Link DSM-520, Dish VIP-722, Polk 1.2TL, CSi5, LS/fx, RT-800 and PSW-650 |
#40
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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. |
Audiokarma |
#41
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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.
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Pioneer SX-1080, Pioneer PL-115D, Pioneer CT-F9191, Pioneer RG-1, Wollensak 8050A, Akai 4000DS MkII, Pioneer CS-05 & Polk 1.2TL Denon 5803A, Pioneer DVL-700, Pioneer CT-W603RS, Toshiba HD-A3, D-Link DSM-520, Dish VIP-722, Polk 1.2TL, CSi5, LS/fx, RT-800 and PSW-650 |
#42
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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.
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#43
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...
Last edited by andy; 12-05-2021 at 07:55 PM. |
#44
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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.
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Pioneer SX-1080, Pioneer PL-115D, Pioneer CT-F9191, Pioneer RG-1, Wollensak 8050A, Akai 4000DS MkII, Pioneer CS-05 & Polk 1.2TL Denon 5803A, Pioneer DVL-700, Pioneer CT-W603RS, Toshiba HD-A3, D-Link DSM-520, Dish VIP-722, Polk 1.2TL, CSi5, LS/fx, RT-800 and PSW-650 |
#45
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What about using the paper magnet strips they used on precision inline tubes to touch up the dynamic after the fact?
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Audiokarma |
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