Threshold 4000

R-K Rønningstad · 8th June 2006, 06:43 AM

Please find attached some 4000 schematics; PSU, display etc

Rolv-Karsten

R-K Rønningstad · 8th June 2006, 06:45 AM

Another

R-K Rønningstad · 8th June 2006, 06:47 AM

Power supply 4000

R-K Rønningstad · 8th June 2006, 06:48 AM

Another...

R-K Rønningstad · 8th June 2006, 06:49 AM

And the transformer

R-K Rønningstad · 8th June 2006, 06:51 AM

And finally the schematics for good measure

SkyChu · 14th June 2006, 10:49 AM

Very Thank you!

Zero Cool · 1st July 2009, 04:05 PM

Quote:

Originally posted by SkyChu
Very Thank you!

YES thank you! I have a 4000 on its way here now! from a secret lab location located somewhere up in the Hills of calif-forn-i-a!!!

Nelson Pass · 1st July 2009, 08:15 PM

Many thanks for the timely posting - one of my business partners
requested that information to repair an old 4000, and I didn't have
them.

Keep in mind that there are a couple of variations on the front end
circuit, but if you find that yours is different, it is likely the one
where the driver devices are a butt-load of to-92 devices in parallel.

Zero Cool · 2nd July 2009, 02:57 PM

Quote:

Originally posted by Nelson Pass
Many thanks for the timely posting - one of my business partners
requested that information to repair an old 4000, and I didn't have
them.

Keep in mind that there are a couple of variations on the front end
circuit, but if you find that yours is different, it is likely the one
where the driver devices are a butt-load of to-92 devices in parallel.

Thanks for the heads up. I can't wait for it to arrive and I can dig in!

14th June 2006, 10:49 AM	#7
SkyChu diyAudio Member Join Date: May 2002 Location: Taiwan	Very Thank you! __________________ Sky Chu

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1st July 2009, 08:15 PM	#9
Nelson Pass The one and only Join Date: Mar 2001	Many thanks for the timely posting - one of my business partners requested that information to repair an old 4000, and I didn't have them. Keep in mind that there are a couple of variations on the front end circuit, but if you find that yours is different, it is likely the one where the driver devices are a butt-load of to-92 devices in parallel.

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