Linn Switch Mode Power Supplies (SPS/SMPS) - Schematic Overview wanted

In the meantime there are a wide range of different SMPS versions from Linn - usually suited for various Linn (pre-) amplifier models.
Until now Linn don't support any repair efforts of the user's - even the delivery of any circuit diagram is refused, because Linn claim, the replace of the whole SMPS module provides best reliability.

The actual reason, however, is to avoid under all circumstances that the presence of deficiencies on circuit design - which are clearly present - come to the public.
The main deficiencies are thermal stress and/or inferior parts (mainly bad caps, both in leaded and SMD version).

It has been increasingly common for about 15 years to offer low-quality products with a very high-quality exterior very expensive (sometimes extremely expensive) - btw in all specialist areas of products and not only in the home audio area.

The question is, how many technical guys have create schematics (reverse engineering) of their Linn power supply versions - in the kind of this "Brilliant" schematic, which I have create several years ago - go to post #5 under
Linn "LINTO" MC Preamp Schematic without SMPS - Schematic for SMPS wanted

Maybe on Linfo so as the Linn Forum are own creatings of schematics (maybe of various power supplies), unfortunately this URL's don't longer exist because Linn closed both - additional also not to find by webarchive.
 
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some images of various examples
 

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more pics
 

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Most seem like flybacks the long board with the mains connector is likely TOP278 based.

No need to reverse engineer those, the circuit is likely straight out of the datasheet.

First post shows IR2121? high/low side mosfet driver so thats a push/pull SMPS
 
Hello,
Yesterday i visited the Linn website to find some info for a German forum. Linn tells us that if you have one of their smps supplies that is between 10 to 15 years ago you can send it to them and they will replace the caps and " revise " your supply. Now with brexit active it will cost you around 150 euro.
I think if high quality caps are used and measures are taken that surrounding temperature is just a little warmer than your room you can get something that will work decently longer than 15 years.
MOST commercially available products are not build to last.
Greetings,Eduard
 
Hello,
Yesterday i visited the Linn website to find some info for a German forum. Linn tells us that if you have one of their smps supplies that is between 10 to 15 years ago you can send it to them and they will replace the caps and " revise " your supply. Now with brexit active it will cost you around 150 euro.
I think if high quality caps are used and measures are taken that surrounding temperature is just a little warmer than your room you can get something that will work decently longer than 15 years.
MOST commercially available products are not build to last.
Greetings,Eduard
Hi eduard,
Where on Linn’s website can I find the info on the old smps recap offer?
Best regards!
 
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