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Let's Get Technical => Troubleshooting Problems => Topic started by: duecemfhatchet on August 19, 2019, 07:58:18 AM

Title: B200s hum
Post by: duecemfhatchet on August 19, 2019, 07:58:18 AM
I have a B200s power amp that has a extremely loud buzz or hum. It has steadily gotten louder to the point of almost being unusable. Any ideas where to start?
Title: Re: B200s hum
Post by: MarshallJMP on August 19, 2019, 12:29:47 PM
I would start with the big caps in the power supply. It could also be that one of the transistor is drawing to much current. Do you have DC voltage on the output?
Do you have hum on both channels?
Title: Re: B200s hum
Post by: duecemfhatchet on August 19, 2019, 05:13:51 PM
Yes it is in both channels and no DC voltage at outputs.
Title: Re: B200s hum
Post by: MarshallJMP on August 20, 2019, 09:24:04 AM
In that case I would suspect a faulty filter cap.