Failed Denon DSW-80 sub

[Zeptoplix 10+ year member]

So, I picked up one of these units for $10.

Got it home, its broken, not a big deal it only cost me $10

Now i want to fix it.

I took it apart. That was alright.

What I found to be interested, is that the amplifier is completely sealed in a small box, with no external heatsink. The heatsink inside, was a joke. basically a thin plate of metal folded a couple times.

There are two modules, they look like mosfets, but i searched the part number and they came up something like thrysistors or something.

Parts : Toshiba A1941, Toshiba C5198

I am leaning towards one or both of these being failed. How can I test them? The amp powers on but goes into protect mode. No visible burn marks, or puffy caps. I think this is a poor design to have so much heat generated in this small box (the transformer, is in this box to) and that these parts have failed. What do you guys think?

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[Fast1one 10+ year member]

Why not just replace it with a cheap plate amp from parts express? Much easier than trying to discern what is wrong with the amplifier...

BTW, if you want to wait a couple weeks I have a 25 watt RMS dayton plate amp that is laying around //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif Its back in my apartment at college...

 

[BrianChia 10+ year member]

Why not just replace it with a cheap plate amp from parts express? Much easier than trying to discern what is wrong with the amplifier...
BTW, if you want to wait a couple weeks I have a 25 watt RMS dayton plate amp that is laying around //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif Its back in my apartment at college...

Some people like to do it for the challenge... //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[Zeptoplix 10+ year member]

Well I can buy the parts I want to throw at it for $10 or so delivered. So if it still does not work, it still, is only $20 that is wasted. Why not keep it original, in case I want to sell it?