How to obtain a service manual or schematic for a Samson MDR6 mixer? Thanks
One channel has a bad hum. It can't be heard when that channel's fader is at minimum and it increases as the fader is brought up.
Audio Players & Recorders - Samson - MDR6 Mixer
Answers & Comments
Check ac source, most samson produck uses 240 Volt
Check integrity of cabling and circuitry delivering the signal to the fader or to the amplifier (VCA or op-amp etc) it is controlling. Doesn't sound like an earth or supply problem as hum is under fader control, i.e. not prevalent under all conditions. An ac supply problem is not gong to affect just one channel unless it is happening somewhere close to the fader / level control circuit.