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

For the Rev 2:

KORG PolySix MIDI

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

{$60 parts & labor}

MIDI Retrofits

Add cassette interface -- upgrades the operating system & adds cassette IN & OUT jacks, for loading & saving programs. {$75 parts & labor}

Rev 2 Memory Expansion -- increase onboard patch storage from the stock 40 programs to 120 programs, in 3 banks selectable via front panel toggle switch.  Patches in all banks can be saved via front panel editing and via cassette interface. {$120 installed}

______________________________________________________________________

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 for 3.2 --  upgrade to version 3.3, which adds memory for two more 40-program banks (120 programs total).

{$75 parts & labor}

MIDI Interface is available for versions 3.2 and 3.3.

The original Sequential Circuits board, with simplified mounting. 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.

{$150 parts & labor}

Keyboard Bushing Replacement For any version -- improved keyboard feel & quieter response {$75 parts & labor}

Details, questions, more info: