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Post by mastertech on Dec 13, 2016 22:54:28 GMT -5
They both seem to be exactly the same except for being overpower by the B- voltage.
They almost seem to be acting normal.
there is one more thing I could suggest. But it is a gamble. If you got more of those replacements for TR107 I would suggest assembling the complete both channels including R137 and R138. Maybe the circuits need to be completely assembled with "ALL" parts in order to function properly.
It will either work, not work or blow TR107 and TR108.
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nashou
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Post by nashou on Dec 13, 2016 22:56:25 GMT -5
Before I do that let me add this. So , I am looking at that area of R150,152 and 154. So I removed R154 and the voltage dropped back to -10.38.
Does that tell you anything?
Athanasios
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Post by mastertech on Dec 13, 2016 23:02:12 GMT -5
well if you put those parts back in and remove the same parts on the other channel and it does the same thing, then no, tells me nothing.
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nashou
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Post by nashou on Dec 13, 2016 23:09:28 GMT -5
well if you put those parts back in and remove the same parts on the other channel and it does the same thing, then no, tells me nothing. yep same results. We know lifting r151 brings back -B1 so I went straight to R153 , lifted it and same results, it stayed low. I only have one set of 2sk363's so if it blows the outer ones like it did I then have one more set to replace the outer halves. So what the hell I'll give it a try. If it blows I'll wait till i need other parts from UTsource and then order the correct ones again and some of the cheapo test ones that we can blow up  Here goes nothing...... |
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nashou
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Post by nashou on Dec 13, 2016 23:27:28 GMT -5
woo hooo!!!!!! I think that was it !!!!
I got scared on the outer half of TR108 the gate voltage began to rise up to -1.xxx !!!! So I shut it down and let it cool for a bit.
Then I turned it back on to see if it happen again. I waited a few minutes with the probe on that gate and it slowly rose to about -12mV
Oh And the Servo amp section is not getting hot from my initial observation.
So I will test that gate for a longer time maybe tomorrow.
Thanks mac !!!!
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Post by mastertech on Dec 13, 2016 23:31:13 GMT -5
What's the voltage on R153 and R154? Fingers crossed. Gotta go. I'll check in tomorrow.
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nashou
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Post by nashou on Dec 14, 2016 18:34:45 GMT -5
What's the voltage on R153 and R154? Fingers crossed. Gotta go. I'll check in tomorrow. .1mV and 12.5mV  Left it on for about 5 minutes , I think we can say its all done !! Must have been the original diode on the Eq board and then the two diodes on the Main board, the loose one I found last and the other one that was bad. D328 and 329. Its about time, I have been working on this since May and the Phono issue since mid June !!!! Now to put the board back in the proper way and see how it passes Audio from a Turn Table. Athanasios |
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Post by mastertech on Dec 14, 2016 18:41:18 GMT -5
YEA. Keep us updated.
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nashou
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Post by nashou on Dec 14, 2016 19:18:32 GMT -5
Going to Snow throw the drive way had a small lake affect storm roll through. About 8 inches or so.
Athanasios
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nashou
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Post by nashou on Dec 14, 2016 22:47:32 GMT -5
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Post by mastertech on Dec 14, 2016 23:34:36 GMT -5
 I want a piece of pie when I come up to visit some day after this one, LOL.
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nashou
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Post by nashou on Dec 14, 2016 23:49:35 GMT -5
I want a piece of pie when I come up to visit some day after this one, LOL. You can have a nice Lamb Souvlaki dinner with roasted greek potatoes !! You'll love it!!! |
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I want a piece of pie when I come up to visit some day after this one, LOL.
