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06 August 2014, 23:53
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#1 |
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Registered User
Join Date: Nov 2011
Location: Detroit
Posts: 58
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Newtek Video Toaster let the magic smoke out
I recently acquired another video toaster, version 1 with another Amiga 2000.
I inserted the Video Toaster in the Amiga, and powered it up. The toaster immediately started smoking. A purple smoke. I powered the amiga down as fast as I could to inspect the damage. The smoke came from the center of the section right next to the PSU. It looks like maybe one of the brown caps near on the removable card with the BNC connectors is charred. Its between the header pins and U22. I powered up the machine again with this section of the card removed, but the rest of the video toaster installed, and the machine boots as normal, smoke free. Any ideas what could have caused this? Is it at all common? Chances of repair? |
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07 August 2014, 00:02
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#2 |
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Registered User
Join Date: Nov 2011
Location: Detroit
Posts: 58
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Low res and high res zip attached.
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07 August 2014, 11:27
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#3 |
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The show must go on.
Join Date: Dec 2010
Location: Alkmaar Nederland
Posts: 269
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It looks like a tantalum capacitor that's gone bad, I would just replace it and try again.
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07 August 2014, 11:46
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#4 |
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WinUAE developer
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 49
Posts: 26,502
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Yeah, tantalum cap most likely. Tantalum capacitor common failure mode is internal short circuit which will result in smoke or explosion because they are used for power filtering. (Shorts +5v/+12v to ground when it dies).
EDIT: just remove it and try again, it probably isn't needed as long as other caps work 
Last edited by Toni Wilen; 07 August 2014 at 11:53. |
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08 August 2014, 14:02
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#5 |
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The show must go on.
Join Date: Dec 2010
Location: Alkmaar Nederland
Posts: 269
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That A2000 PSU, was it the first time in years when you tuned it on?
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08 August 2014, 20:47
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#6 |
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Registered User
Join Date: Nov 2011
Location: Detroit
Posts: 58
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I just acquired this particular machine so I don't know if it was powered up recently by the seller.
I powered it up at least ten different times before I put the video toaster card in it to test. I will cut the cap off and try it again. Is the consensus that it's ok to do this test? |
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09 August 2014, 00:33
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#7 |
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The show must go on.
Join Date: Dec 2010
Location: Alkmaar Nederland
Posts: 269
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It's fine. If it works replace it in the future.
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09 August 2014, 02:55
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#8 |
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Registered User
Join Date: Nov 2011
Location: Detroit
Posts: 58
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Awesome guys, no smoke this time.
I powered up the machine fine with the card assembled and installed, but with the capacitor cut off. I will have to test the video toaster now, to see if it works, but I think it looks promising at least. I will update when I have time to install the toaster software etc. Thanks! |
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