Roland MC-303

The Roland MC-303 is a music composition device designed more for live performances than studio use. It uses a mix of digital buttons, a rotatory encoder, and analog potentiometers for the interface.

Causes

 * The volume and control potentiometers are commonly damaged and can become internally loose

Solutions

 * You may get lucky and be able to bend the fingers back or possibly glue the case back together on the potentiometer
 * Replace bad potentiometers

Disassembly Notes
Be careful of the ribbon cables when removing PCBs. These use a crimping style connector that clamps down onto the individual wires that stick out of the end of the ribbon cable. It can be easy to tear or bend these.

Roland MC-303 PANEL BOARD
ASSY 70788723

Roland MC-303 PANEL BOARD
*Not yet tested

Related Links

 * Video opening the MC-303 to determine issue with potentiometer