Roland MC-505

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For more information, see this article's corresponding Wikipedia page: Device.
Roland MC-505
Preliminary Information
Release Year 1998
Leak Risk Low
Batteries None
Mounting Technology Through Hole, SMD
Capacitor Types Aluminum Electrolytic, Tantalum, Ceramic
Destructive Entry Glued faceplate, replacement adhesive needed
Hardware Specifications
Storage SmartMedia Card
Power Requirements
Power Connector IEC C13/C14 Socket

From Roland's Groovebox line of products(Related: Roland MC-303), the MC-505 is a music sequencer with integrated ROMpler for sound creation.

Known Issues

Knob is Gone

Causes

  • A big whack

Solutions

  • Replace potentiometer, hopefully find knob

Buttons Stuck Inside

Causes

  • Rushed reassembly
  • Depressed in too far

Solutions

  • Open device, remove button panel, re-apply double sided tape to secure buttons and replace them, reassemble

Disassembly Notes

Be sure to remove knobs, slider caps, rotary wheel, and nut under rotary wheel when removing top panel

Clear faceplate over LCD is double sided taped on top and bottom. Use a thin guitar pick to break glue loose from inside and then work it slowly from the front once raised. Warning: the tinted covers over 7 segment displays can be scratched

Original Parts

Potentiometers
Type Qty Roland Part Name OEM Part Number
Volume 2 RK09L12D0 10KBX2 RK09L12D0-F15-C0-A10 or RK09L12D0A1W
Non-Detented, single channel 8 RK09L1140 10KB RK09L1140-F15-C0-B10 or RK09L1140A5L
Detented, single channel 2 RK09L1140 10KB with click RK09L1140-F15-C1-B10 or RK09L114001E

Original potentiometer's datasheet: https://tech.alpsalpine.com/assets/products/catalog/rk09l.en.pdf

Replacement Parts

Potentiometers
Type Qty Compatible Part Number Order Links
Volume 2 P0925N-FC15AR10K Mouser
Non-Detented, single channel 8 P0915N-FC15BR10K Mouser, Digikey
Detented, single channel 2 P0915N-1FC15BR10K

If parts are not available or different selection is preferred, you can use the values in the Original Parts section to perform a parametric search.

Note: It seems detented potentiometers are not being made or are extremely difficult to find. The provided part number is from the P09x datasheet[1] that should be detented but there are no good sources available. A non-detented model could be substituted without issue.

External Links

References