Help on old school soundstream!

Tacobike

Member
2020-01-04 6:05 am
My SS reference 500s blew a few resistors, I was wondering if anyone knew the resistance numbers or have photos of their own boards. I hope I can fix it myself but maybe I should look for an audio tech who can fix the amp for me. Any help would be appreciated. (Sorry if this is in the wrong place, I’m new)
 

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The resistors that burned are the power supply gate resistors. They only burn when the PS FETs under the board fail. The PNP driver transistors sometimes fail as well.

The PS FETs can fail for several reasons (shorted transformer, shorted rectifiers, shorted output transistors...). You need to check the rectifiers and the outputs with a multimeter. You will have to replace the PS components to see if the transformer is the problem unless there is obvious evidence of damage (rare).

If you're new to amp repair, read the following:
bcae1.com - Car Amplifier Repair Tutorial - The Basics

See attached.
 

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