AnalogApples
Member
My M3500 was having a strange 60 cycle buzz, like a ground loop, but only on the monitor/studio outputs. The stereo outputs sound quiet. This problem is reported elsewhere, along with the problem of generally high noise floor, including hiss.
I lifted up the effects return, aux, switches control room panel. Each PCB board is linked with a snap-on PCB board attached underneath.
Carefully free that entire connector board, CLEAN EACH METAL PIN WITH DEOXIT. Then reinstall. Noise gone!!
I tried only reseating it, that didn’t help. Then I sprayed the power supply plug and worked in and out of it’s clip. Noise floor now even lower!
I’m thinking every metal on metal contact in this board has corroded and needs cleaning.
Thought I’d add my solution to the archives! Cheers friends ! Happy New Year!
I lifted up the effects return, aux, switches control room panel. Each PCB board is linked with a snap-on PCB board attached underneath.
Carefully free that entire connector board, CLEAN EACH METAL PIN WITH DEOXIT. Then reinstall. Noise gone!!
I tried only reseating it, that didn’t help. Then I sprayed the power supply plug and worked in and out of it’s clip. Noise floor now even lower!
I’m thinking every metal on metal contact in this board has corroded and needs cleaning.
Thought I’d add my solution to the archives! Cheers friends ! Happy New Year!