#46
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Best TV ever built, if I could only keep one set my Avanti with a 25DC56 would be it.
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#47
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I got this set all put back together and SETUP PROCREDURE-D today. I have a video of it on my Youtube channel.
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"If you wish to make an apple pie from scratch, you must first invent the universe." -Carl Sagan Last edited by TUD1; 02-14-2018 at 12:16 PM. |
#48
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Just kidding. Here's AFTER the procedure.
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"If you wish to make an apple pie from scratch, you must first invent the universe." -Carl Sagan Last edited by TUD1; 03-12-2017 at 06:56 PM. |
#49
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They look so much better with the setup wrong, don't they.
BTW: convergence, purity, grayscale, deflection/geometry, and user controls adjustments are referred to as SETUP adjustments, and what you did is a SETUP PROCEDURE (new sets often received it prior to customer delivery, and/or at customer residence upon delivery thus the name setup). Alignment is where you get a Sweep/marker generator, an oscilloscope, and a diddle stick and adjust every slug in the tuner and IF till the video frequency response curve matches factory spec. Best to not confuse the two. Setup can be done by most people (with instructions), and should be repeated occasionally, but alignment (is very difficult and) should not need to be done after the factory except under extreme circumstances where uncommon failure in those systems or "screw driver drift" have made an alignment necessary.....We don't want noobs with convergence problems bleeping with the IF slugs because someone recommended preforming an alignment. *(please don't read the caps as shouting, but rather read them in a dramatically deep TV announcer voice with lots of reverb.)
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Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 |
#50
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As I've been watching this TV, the convergence has somehow drifted to the point where it looked nothing like the picture of after I set it up last. I decided that enough's enough, and I dynamically converged this thing for two hours today. Unfortunately, I don't have a before picture, but believe me, it was bad. This picture shows after I worked on it for two hours. Big improvement.
__________________
"If you wish to make an apple pie from scratch, you must first invent the universe." -Carl Sagan Last edited by TUD1; 02-14-2018 at 12:16 PM. |
Audiokarma |
#51
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Looks great, nice job.
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#52
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I don't think I ever mentioned a problem this TV is having. When you first turn it on, the picture is very brite and washed out and has retrace lines, but as it runs for 5-10 minutes, it gets darker. I've been told it could be a cap in the boost circuit, or a loose module connection.
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"If you wish to make an apple pie from scratch, you must first invent the universe." -Carl Sagan |
#53
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I did convergence on this thing yet again. There was a blue stripe above the image with widescreen programs. It's fixed now. I checked the high voltage since I had the back off, and it was right at 30 KV. That seems a little high to me. What do you all think? Speaking of high voltage, I accidentally touched the horizontal output transistor while the set was on, and if I wasn't fully awake before, I sure am now. Now I'm that much closer to my Zenith Chromacolor.
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"If you wish to make an apple pie from scratch, you must first invent the universe." -Carl Sagan |
#54
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Have the white safety caps been replaced? If so, perhaps your probe is out of whack. Mine's a little strange, showing only about 21 KV on my Zenith before and after changing the caps. The pic looked fine last I tried it.
P.S. I got zapped with the residual HV from my Sylvania's CRT when removing the 2nd anode lead to replace the tripler. The set was just on. |
#55
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don't use it anymore unless you know the safety caps have been replaced.
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Audiokarma |
#56
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I replaced the safety caps myself with Sprague Orange Drops. Jon, I also got a bite when I took the CRT out my 1967 RCA, and that was about 1% of what I experienced today.
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"If you wish to make an apple pie from scratch, you must first invent the universe." -Carl Sagan Last edited by TUD1; 08-29-2016 at 06:07 PM. |
#57
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Wow. A full HV bite has to be a rite of passage for us, so I mean it when I say congrats on your milestone.
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#58
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Thanks, mate!
__________________
"If you wish to make an apple pie from scratch, you must first invent the universe." -Carl Sagan |
#59
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This TV lost high voltage tonight at 22:38 central time. I remember when I first got this thing, I plugged it in, and this is exactly what it did. It had audio, but no HV. The white safety caps have been replaced with orange drops.
Update - problem solved. Horizontal board had dirty contacts.
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"If you wish to make an apple pie from scratch, you must first invent the universe." -Carl Sagan Last edited by TUD1; 10-15-2016 at 11:18 PM. |
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