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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Taco, if you are in the US, you want Jeremy Loftis in Oklahoma to work on your soundstream, he is a wizard with them and can also do many upgrades. Find him on facebook in the Old School Soundstream group. If not and you want to do it yourself, I will see if I have anything on that in the morning (in bed right now lol).
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.
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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