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#77
06-20-2024, 06:44 PM
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Look at the voltages, Readings Vs. Schematic the readings are closer to 0, not closer to -7V cutoff. They are increasing with respect to cathode 0. -3v is higher than -4v. .
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Yes you can call me "Squirrel boy" 
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#78
06-20-2024, 06:45 PM
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 and caused me pure hell in my FADA, even though the parts list called out ONE type, there were 2, the white with the weird leaking, and the tube type that seemed OK.What's in yours? :O
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=^-^= Yasashii yoru ni hitori utau uta. Asu wa kimi to utaou. Yume no tsubasa ni notte. いとおしい人のために
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#80
06-20-2024, 07:02 PM
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Is the sound ok? You see that full water hose from the PS goes to the 6K6 through some very small value resistors, and a low resistance output transformer.... Is C224A ok? What voltage is on pin 5 of 6K6? .
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Yes you can call me "Squirrel boy" Last edited by Username1; 06-20-2024 at 07:10 PM.
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#81
06-20-2024, 07:08 PM
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Yeah, they do look like Resistors!
 yours is much cleaner! and lacking that mysterious brown stuff that came out of mine!
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=^-^= Yasashii yoru ni hitori utau uta. Asu wa kimi to utaou. Yume no tsubasa ni notte. いとおしい人のために
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#82
06-20-2024, 07:26 PM
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The sound is diminished. I have to turn it up all the way to hear a decent tone out of the Sencore VA62. I put a 47uf electrolytic in for the 20uf C224 A section. Too big? I didn't have a 22uf cap for it. It's supposed to be 20uf. The voltage on pin 5 of the 6K6 is -17.6V.
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#84
06-20-2024, 08:20 PM
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Interesting thing...as I said before, the horizontal oscillator is putting out a clean 15.75 KHz sine wave but when I look at the waveform on the plate of the 6AL5 Horizontal Sync Discriminator, the waveform trace looks fine...it's just unstable and jumping all over with instability in the picture. I don't know if that means anything other than crossing the oscillator off the troubleshooting list. The 6AL5 is new and I've put 3-4 different ones in the socket with the same outcome.
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#85
06-20-2024, 09:06 PM
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Still waitin for that cold-start test on the 135V rail.
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#86
06-20-2024, 09:09 PM
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#87
06-20-2024, 09:38 PM
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#88
06-20-2024, 09:50 PM
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http://suzaku.live-evil.org/1500pf2.png that's not flux. no idea where it came from. the cap was all alone not near anything else. how did that get on there, unless it came out of the cap?
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=^-^= Yasashii yoru ni hitori utau uta. Asu wa kimi to utaou. Yume no tsubasa ni notte. いとおしい人のために
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#89
06-20-2024, 10:06 PM
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Well, I think there has to be something wrong keeping the PS from getting close to the numbers on the schematic, I thought the audio circuit, but it doesn't look like it.... So you may want to try doing the fire up from cold and looking for some part getting too hot too soon, Audio output transformer, maybe primary windings leaking current to ground. You may also want to run it with a meter on the 135V line, & pull out a tubie one at a time, and see if a circuit lets that line come up a lot, then possibly poke around in that circuit. (Just take out 1 tubie, then put it back & remove another one.) You know taking out Vert. Horiz, outputs are going to make a big change - cause they use more ampies.... Also, know that power supply problems may and often will effect many other parts of the tv, so Horiz. jumping instability may be PS problem..... You also could put this thing out in the yard and light it on fire, sit back & toast a marshmallow and start another set, and be ahead of the game this time next week..... In my book, setting it on fire is always an option..... You also might want to cut the line from the two rectifiers before they feed the entire set, and measure the current and see if it exceeds what the 5U4's are rated for..... If it does, then for sure you know there is a excessive load someplace..... .
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Yes you can call me "Squirrel boy"
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#90
06-20-2024, 10:19 PM
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 Got a question. The junction between R186 (6750Ω) and R240 (12Ω) should go to chassis ground. Does it? And does R240 correctly measure 12Ω?Since that junction is the neutral point between the positive and negative supplies, if it lost connection to ground, it would be "floating" and could cause really crazy supply voltage readings. Just a shot in the dark Last edited by old_coot88; 06-20-2024 at 10:26 PM.
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