I bought this amp a few years ago as part of a package deal. I hooked it up before purchase and it worked, but as soon as I tried to use it for real it popped 4 mosfets on the input side. Included are some pics of the board and of the blow mosfet, does anyone know a good place to buy them? This is a gorgeous amp and I would love to get it going again.
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In the first pick are those the diver transistors, and in the second pic are those the gate resistors? What I think are the gate resistors are also a little burnt looking but I can't seem to find them on the net to find out what they are.
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The driver transistors are Q29, Q33, Q34 and Q37. The PNP drivers (the black ones in each pair) are the ones that most commonly fail.
The gate resistors are orange, orange, gold, gold and should read 3.3 ohms ±5%. You won't be able to check them until you remove the failed power supply FETs.
The gate resistors are orange, orange, gold, gold and should read 3.3 ohms ±5%. You won't be able to check them until you remove the failed power supply FETs.
Ok so
Q29 seems to run at normal temp/
Q33 looks blown
Q34 gets hot when powered on
Q37 look blown
Any ideas on where to buy these parts?
Thank you for the help
Q29 seems to run at normal temp/
Q33 looks blown
Q34 gets hot when powered on
Q37 look blown
Any ideas on where to buy these parts?
Thank you for the help
Yeah they are fried just as expected. you might want to try this guy on ebay...
jandrelectronix | eBay
Or maybe Perry knows a good sub to use. The guy on ebay use to work for SoundStream so he has a lot of excess inventory on hand. Send a email thru ebay and ask for Jaime...😉
jandrelectronix | eBay
Or maybe Perry knows a good sub to use. The guy on ebay use to work for SoundStream so he has a lot of excess inventory on hand. Send a email thru ebay and ask for Jaime...😉
Yes. Use the originals if available. If not, the BD140 installed facing the opposite direction works.
When those short, it often damaged the 2N2222A transistors as well.
You should check other components like the outputs and rectifiers before ordering. He may have those as well.
When those short, it often damaged the 2N2222A transistors as well.
You should check other components like the outputs and rectifiers before ordering. He may have those as well.
R86 is the I guess "gate" resistor that may be bad as well all the others rear like 3.5 and this one reads 4.2.
Since both sides of the amp seem to have had a problem would it be a good idea to replace the other 3 as well?
Ok thank you. I am in contact with the person on Ebay and hopefully he can help with getting the parts.
Can anyone tell me how I figure out what watt resistors I need to replace the one that I need?
Thanks
Thanks
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