STUDIO REPAIR » Studio Electronics » P-Five  (15 Slides)     [Page 1 of 1] :: Jump To  
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Studio Electronics P-Five - An original SCI Prophet-5 fitted into a rack-mountable case and equipped with an integrated MIDI interface
 
Studio Electronics P-Five - With Prophet-5 * Studio Electronics P-Five and the original SCI Prophet-5 (Rev.2) - yum yum!
Studio Electronics P-Five - Front View * Front view of the P-Five on top of its originator, Sequential Circuit's Prophet-5.
Studio Electronics P-Five - Top View * Slanted view from above.
Studio Electronics P-Five - Rear View * Rear view - MIDI and cassette I/O, audio out, mains, that's it.
Studio Electronics P-Five - Prophet-5 Voice PCB * An original Prophet-5 voice board (2nd revision with SSM circuits; in the 3rd revision SCI used Curtis chips at last) on top of the P-Five.
Studio Electronics P-Five - Opened * Top cover removed.
  With Prophet-5  
  Front View  
  Top View  
  Rear View  
  Prophet-5 Voice PCB  
  Opened  
Studio Electronics P-Five - CPU Board Removed * The unit had an error on the CPU board so I had to remove it.
Studio Electronics P-Five - Circuit Boards * Front panel PCB and both PCBs mounted on the case's left side are produced by Studio Electronics to fit the Prophet-5 into a rack-mountable format. Really well done!
Studio Electronics P-Five - MIDI Interface * This is the MIDI interface board of the P-Five produced by Studio Eelctronics. In the lower left you can see its Z-80 CPU.
Studio Electronics P-Five - Multiplexer Board * This is the multiplexer circuit board produced by Studio Electronics for the P-Five. It replaces the complete electronics of the original Prophet-5's panel board.
Studio Electronics P-Five - Power Supply * The original linear regulator is replaced with a modern switched-mode power supply.
Studio Electronics P-Five - Voice Board Butchering * Once upon a time … these two printed circuit boards were one! Here you can see a real curiosity of the P-Five: the original voice board of SCI's Prophet-5 is way to long to fit in a rack-mount case. So Studio Eelctronics choosed the brute forced way - cut it in two halfs and bridge the destroyed traces with direct wiring!
  CPU Board Removed  
  Circuit Boards  
  MIDI Interface  
  Multiplexer Board  
  Power Supply  
  Voice Board Butchering  
Studio Electronics P-Five - PSU Testing * Testing the P-Five with an external power supply.
Studio Electronics P-Five - Repairing * The CPU PCB had a shortage on the -15V rail so I had to cut some traces sector by sector to insulate the fault.
Studio Electronics P-Five - Test Run * Test-running the P-Five.
  PSU Testing  
  Repairing  
  Test Run  

 
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