Hello,
I am trying to gain as much info as I can before digging into this, so figured I’d ask here as well in the event anyone is familiar with this issue.
I’m not an electronics expert, but dabble, so am looking for some basic level guidance.
I have a Belles 350A Ref with soft start. It sounds fantastic. The issue is when first firing it up cold, one channel pushes the woofer out and holds it for a few seconds until it stabilizes, then it returns. Using a dmm that channel shows about 10vdc during that time, then reduces to under a volt.
I have a speaker switch I can use to prevent unnecessary wear and tear on the speakers, like an output relay would, but I don’t like that something isn’t right and don’t want to eventually lose a channel over it.
Mr. Belles doesn’t release schematics, and has not returned my emails asking him for guidance or repair (I really don’t want to ship it).
These circuits look fairly simple in design and there are no adjustable pots anywhere.
Can anyone tell me why this is occurring? It does not matter if there is an input signal or not. Perhaps which part is at fault or suggestions on how to test.
I have been advised it sounds like a misbehaving fet, possibly driver or output, with guidance to check between the driver and output stage to see if it exists there. Solid advice that I plan to do, but like I say I just want to get as much advice as possible before digging in.
Another suggestion was made that the large ps caps could be getting dry in that channel, causing that channel to take longer to get up to voltage and stabilize.
If there are any Belles and/or solid state wiz’s on here please help if you can, thank you!
I am trying to gain as much info as I can before digging into this, so figured I’d ask here as well in the event anyone is familiar with this issue.
I’m not an electronics expert, but dabble, so am looking for some basic level guidance.
I have a Belles 350A Ref with soft start. It sounds fantastic. The issue is when first firing it up cold, one channel pushes the woofer out and holds it for a few seconds until it stabilizes, then it returns. Using a dmm that channel shows about 10vdc during that time, then reduces to under a volt.
I have a speaker switch I can use to prevent unnecessary wear and tear on the speakers, like an output relay would, but I don’t like that something isn’t right and don’t want to eventually lose a channel over it.
Mr. Belles doesn’t release schematics, and has not returned my emails asking him for guidance or repair (I really don’t want to ship it).
These circuits look fairly simple in design and there are no adjustable pots anywhere.
Can anyone tell me why this is occurring? It does not matter if there is an input signal or not. Perhaps which part is at fault or suggestions on how to test.
I have been advised it sounds like a misbehaving fet, possibly driver or output, with guidance to check between the driver and output stage to see if it exists there. Solid advice that I plan to do, but like I say I just want to get as much advice as possible before digging in.
Another suggestion was made that the large ps caps could be getting dry in that channel, causing that channel to take longer to get up to voltage and stabilize.
If there are any Belles and/or solid state wiz’s on here please help if you can, thank you!