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Roland JP-8000 low output Keyboard Synthesizers
Old 1 week ago
  #1
Gear Maniac
 
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Roland JP-8000 low output

I fired up my Roland JP-8000 this week and..............................

no sound.

I did some research and learned its common for these to have some/all of the op amps go bad and it leaves the unit with super low output.

I tested mine again and I have this issue. It works just fine (patches, knobs, memory etc) but the volume has to be on max and your source has to be cranked to hear it at all.

Anyone replace the op amps in one of these? If so where did you get them?

Suggestions, help, parts source etc.?

Thanks
Old 1 week ago
  #2
Lives for gear
 

Why do so many pieces of gear from the 90's have this issue? I have this exact same problem with my Alesis QS6.2. The main outputs are so low they're pretty much unusable. Instead, I have to use the headphone outs (which work fine) as a workaround. Others have reported the same issues with theirs too. My memory battery also just recently died in mine too (but that's another issue, which is expected and understandable. I hate that Alesis decided to solder the battery to the PCB, unlike Roland who uses a proper battery holder in their design.).
I've also read here about people having the same low volume output issues with the Roland R70 drum machine.
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