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Old 10th October 2008, 11:38 PM   #1
SS64 is offline SS64  United States
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Default SoundStream 404

I'm repairing this 404 for the hell of it. Its been laying around for awhile now. Here's what is does. As soon as you power it up it pops the fuses and if you bypass the fuses the PS trans. get hot. So I will be replacing the PS fets from 50no6's to 80no6's. I have some 2n6491 and 2n6488's Can I swap those with the tip 107 and 102's?

There are no visible burnt parts or anything so I'm pulling all the outputs tonight and im going to try to get the ps to power up.
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Old 11th October 2008, 12:28 AM   #2
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Pull the rectifiers instead of the outputs. There are only 4 of them so they'll be easier/quicker to remove.

The 6488s and 91s are not a suitable substitute.
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Old 11th October 2008, 12:51 AM   #3
SS64 is offline SS64  United States
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ok its confirmed the ps fets are bad. I will go get some more tomorrow. I will post my results tomorrow.
Thanks for your help Perry
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