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Old 2nd July 2005, 07:05 PM   #1
steenoe is offline steenoe  Denmark
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Default Threshold Stasis 2.

I have a Threshold Stasis 2 comming in for repair! Could any of you post a schematic for that one? I did search, but the links didnt seem to work anymore:-( Now, I never claimed that I actually could repair this thing, only promissed that I would take a look! But man, I would love to bring this baby to sing again. I remember those Stasis amp's back then!! I had never heard anything like it They really rocked the place I really hope to make it sing again. As I understood, the trouble is, that one of the channels is louder than the other! Also he said that one of the VU meters in front was lighting up all the time. Now this guy is not whatever, kind of guy. We go back all the way to school!!
Hope some of you guys are prepared to help out? I will post the excact problems on monday, when I get my hands on the amplifier!!

Steen
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Old 2nd July 2005, 08:03 PM   #2
acaudio is offline acaudio  Germany
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http://www.passlabs.com/np/stasis2-3schem.tif


???
Adam
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Old 2nd July 2005, 08:11 PM   #3
steenoe is offline steenoe  Denmark
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Thanks a lot Adam, but I have a persisting problem; File does not excist. Can you download the tif file?? I can not.

Steen.
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Old 2nd July 2005, 08:51 PM   #4
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Old 2nd July 2005, 09:03 PM   #5
acaudio is offline acaudio  Germany
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Quote:
Originally posted by steenoe
Thanks a lot Adam, but I have a persisting problem; File does not excist. Can you download the tif file?? I can not.

Steen.

Yes, no problem, check your settings (virus scan or protection ???)

I have saved it as *.gif see here:

Adam
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File Type: zip stasis2-3schem.zip (70.3 KB, 580 views)
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Old 2nd July 2005, 09:09 PM   #6
steenoe is offline steenoe  Denmark
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Thanks a lot, guys. I just uninstalled DAP, and then I could download the document Well, from my first posting, any ideas how to get this running again?? This Monday I will try to do some measuring.

Steen.
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Old 5th July 2005, 08:11 AM   #7
steenoe is offline steenoe  Denmark
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Does any of you have a service manual for this amp? A link to it would also be fine. The amp itself actually sound pretty good, only one channel is a bit louder than the other and from the Peak meter on the front, it seems like one channel is putting out some more signal than the other. Even without a signal, the leds lights up. (the first 4-5 leds). Any thoughts on that problem? I would really appreciate a little help on this.
This elderly amp, is very finely build

Steen
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Old 5th July 2005, 03:41 PM   #8
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I don't know anything about Stasis, not even seen one. But I would start checking bias and comparing it to the "good" Channel. Next I would check voltages at different nodes.

You have beside a seeminly good channel so it should not be that dificult
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Old 5th July 2005, 03:45 PM   #9
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Steen,

Could you post a pic of the inside?
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Old 5th July 2005, 03:49 PM   #10
Duo is offline Duo  Canada
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This is highly interesting. I draw two conclusions.

1: Perhaps the channel with the constant VU indication is oscillating. I have had this happen while only causing a reduce in audible gain and causing the amplifier to run a little warm.

2: I doubt the possibility of this idea, but DC offset?? (You'd have probably noticed that by now.) All VU meters I've seen are AC coupled so far. So I doubt offset is doing it, it's not as if it'd reduce the gain any.

Hope that at least gave a bit of input to the subject.
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