I am trying to determine the specifications of this transformer and all my online searches have been unsuccessful. It is from a Nuance powered speaker (N-100). Some of you may be familiar with Nuance (especially if you're older and live in Canada). They didn't have a great rep mostly due to deceitful marketing practice. Regardless, I would like to bring this speaker back to life. While the markings on the transformer are clear, it is quite old and I can't find a match online. I am keen to repair this amp as the transformer burnt out taking the two MOSFETs with it. If I could figure out the specifications of this transformer and find a compatible alternative I am confident could repair this unit. Finding replacements for the MOSFETs was no problem. A schematic would be amazing to have if anyone has access to this. Please see the attached photos for more details. Any help would be greatly appreciated. Thank you!
Nuance N-100 amplifier - looking to identify a transformer and/or find a schematic
- Thread starter jeffmills
- Start date
Help Support GroupDIY Audio Forum:
..that one is a SMPS power transformer on a ferrite core, not an audio transformer..
Thanks for the advice! I found the MOSFETS no problem and have replaced them.
A specialist at a local store said the transformer may still be good as the burning was likely from mosfets and not from the transformer internally. The basic testing confirmed that it is.
However, as there was some damage to the PCB, I am having concerts about testing the newly installed MOSFETS as well as the reinstalled transformer. A PCB SCHEMATIC would be SO HELPFUL for me to confirm so I don't power it up and melt something down.
I know this is an EXTREMELY unlikely LONG SHOT but I figured I would make this post and ask again JUST IN CASE.
Thanks so much everyone!
A specialist at a local store said the transformer may still be good as the burning was likely from mosfets and not from the transformer internally. The basic testing confirmed that it is.
However, as there was some damage to the PCB, I am having concerts about testing the newly installed MOSFETS as well as the reinstalled transformer. A PCB SCHEMATIC would be SO HELPFUL for me to confirm so I don't power it up and melt something down.
I know this is an EXTREMELY unlikely LONG SHOT but I figured I would make this post and ask again JUST IN CASE.
Thanks so much everyone!
chrispbass
Well-known member
From my (somewhat limited) experience with smps , the Tx are usually fine. Yes, yours doesn’t look too clever, but I once had one that looked similar, but was just in close proximity to some burnt out components and was fine. Just be as thorough as you can testing everything else, even if it means desoldering something. Also check semiconductors further down the line. Googling a few generic schematics of smps can also be useful in conjunction with the part numbers of what you’ve replaced as it’s prob not too far adrift from a typical supply shown on a data sheet.
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