By Delay
Wed Sep 28, 2016 2:42 am
Hello,
I have an Akai MPC3000 that is having noise issues when I sample.
My MPC is very quiet when in playback mode. However, when I try to sample something I get a very loud hum in the sample. It sounds like the noise I used to get in the headphones before I did OldGearGuy's headphone ground mod.
When I try to sample the Akai will be silent until I plug in an RCA cables or 1/4" audio cables. The cables don't have to be connected to anything, the hum starts as soon as they are plugged in. If you take the cables out, the MPC is quiet again. If I sample "silence" with the hum and then play back the sample, it will playback the hum as part of the recording.
People have mentioned the inverter, but I don't think this is the issue. There is a very small inverter noise when I sample, but that stops when I turn the backlight off.
I've gone so far as to open up the MPC and disconnect the two pin inverter cable from the filter PCB as well as the three pin cable next to the two pin cable. I've tried to sample while it is disconnected and the noise is still there when I insert cables into the audio in jacks on the MPC3000.
What do you guys think my next troubleshooting step should be?
I have an Akai MPC3000 that is having noise issues when I sample.
My MPC is very quiet when in playback mode. However, when I try to sample something I get a very loud hum in the sample. It sounds like the noise I used to get in the headphones before I did OldGearGuy's headphone ground mod.
When I try to sample the Akai will be silent until I plug in an RCA cables or 1/4" audio cables. The cables don't have to be connected to anything, the hum starts as soon as they are plugged in. If you take the cables out, the MPC is quiet again. If I sample "silence" with the hum and then play back the sample, it will playback the hum as part of the recording.
People have mentioned the inverter, but I don't think this is the issue. There is a very small inverter noise when I sample, but that stops when I turn the backlight off.
I've gone so far as to open up the MPC and disconnect the two pin inverter cable from the filter PCB as well as the three pin cable next to the two pin cable. I've tried to sample while it is disconnected and the noise is still there when I insert cables into the audio in jacks on the MPC3000.
What do you guys think my next troubleshooting step should be?