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Old 23rd September 2012, 11:50 PM   #1
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Location: Oklahoma
Default Diablo Audio

Has anyone worked on a diablo 2500.1 replaced all power supply fets. relayes power but power supply wont power up. no rail voltage. any ideas.

Was a nasty melt down. trying to fix for a fiend.
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Old 24th September 2012, 01:42 PM   #2
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Production model or proto, if it has the heatsink milled with diablo audio... its production and you might just as well trash it.
They are a bad design and will never be stable below 2 ohms.

Ebbcotech is the only person with knowledge of it and you will get a response here and there but never a full answer.
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Old 24th September 2012, 02:05 PM   #3
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Post a photo of the circuit board.
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Old 24th September 2012, 03:49 PM   #4
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It's a proto. It took a hard frying. Killed all the power supply fets. Had several burnt traces and lots of burnt resistors. R&R'd the burnt parts now only the relays come on when powered. No rail voltage. Will post a pic when get back home.
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Old 24th September 2012, 04:55 PM   #5
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I have a proto version on my shelf right now, I can get some values if you need them.

If you could possibly give me the output fet locations. I need to know where the n-channel parts go and the p-channel. Don't ask why.
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Old 1st October 2012, 12:33 PM   #6
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Here are some pics of that amp.
Attached Images
File Type: jpg 2012-10-01_06-13-43_489.jpg (451.1 KB, 172 views)
File Type: jpg 2012-10-01_06-14-10_947.jpg (326.0 KB, 158 views)
File Type: jpg 2012-10-01_06-15-20_620.jpg (498.6 KB, 155 views)
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Old 4th October 2012, 05:59 PM   #7
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What are the parts in the yellow boxes, IRF240 and IRF9240? Which ones belong in each location?
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File Type: jpg diablo main board.jpg (828.4 KB, 138 views)
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Old 7th October 2012, 02:28 AM   #8
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going from the inputs toward the power supply. 4-irfp240 and 4-irfp9240.

Starting to feel like i cant fix anything. this one and three others are kickin my butt.
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Old 7th October 2012, 02:59 AM   #9
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Start with the basics.. Is there power on the power supply IC? Can you list the voltages of each pin for us? (I know, this is a Perry question normally.....) Do you have a scope?

-Blazer40

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Originally Posted by oldguyoklahoma View Post
going from the inputs toward the power supply. 4-irfp240 and 4-irfp9240.

Starting to feel like i cant fix anything. this one and three others are kickin my butt.
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Old 7th October 2012, 03:37 AM   #10
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yes. its a old one but works.
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