Analog Synthesizer Service & Modification
Prophet 5 Upgrades
In addition to the repairs & maintenance listed on the Service page, the following upgrades are also available:
Service
KORG PolySix MIDI
For the Rev 2
Upgrade the EPROM & power supply -- transfer the operating system to a 2716 ROM, eliminating the need for the -5 and +12 supplies; improved heatsinking of regulators. This results in a more reliable power supply, with less chance of "lockup".
Synths for Sale
MIDI Retrofits
{$60 parts & labor}
Add cassette interface -- upgrades the operating system & adds cassette IN & OUT jacks, for loading & saving programs.
Includes disk of factory programs in WAV format.
{$75 parts & labor}
For the Rev 3
3.0 --Upgrade the EPROM & power supply --transfer the operating system to a 2716 ROM,    eliminating the need for the -5 and +12 supplies; improved heatsinking of regulators. This results in a more reliable power supply, with less chance of "lockup".
{$60 parts & labor}
Memory Upgrade, 3.1 & 3.2 --  upgrade to version 3.3, which adds memory for two more 40-program banks (120 programs total).
Includes disk of 120 programs in WAV file format, for loading via cassette port.
{$75 parts & labor}
MIDI Interface is available for versions 3.2 and 3.3.
Send & Receive in Poly or Omni mode on your choice of 16 channels, program change, pitch wheel response & MIDI program load & save.
Includes user instructions & disk of 5 banks of factory programs in Sysex format.
{$150 parts & labor}
Keyboard Bushing Replacement

For any version -- improved keyboard feel & quieter response

{$75 parts & labor}
Details, questions, more info: