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Sequential Circuits Prophet-5 (Model 1000) - Polyphonic Analog Synthesizer
 

Sequential Circuits Prophet-5 - Rear View * SCI Model 1000 Rev 3.3
Sequential Circuits Prophet-5 - Opened * SCI Model 1000 Rev 2.0
Sequential Circuits Prophet-5 - Circuit Boards * SCI Model 1000 Rev 2.0 - Printed Circuit Boards
Sequential Circuits Prophet-5 - Panel Board * SCI Model 1000 Rev 3.3: PCB 1 - Right Control Panel
Sequential Circuits Prophet-5 - Panel Board * SCI Model 1000 Rev 3.3: PCB 2 - Left Control Panel
Sequential Circuits Prophet-5 - Circuit Boards * Board 4 (Voice Board) and Board 3 Rev 3.3 (Computer Board)
  Rear View  
  Opened  
  Circuit Boards  
  Panel Board  
  Panel Board  
  Circuit Boards  
Sequential Circuits Prophet-5 - Computer Board * SCI Model 1000 Rev 3.0: Board 3 (Sect. 3.1 / 3.2)
Sequential Circuits Prophet-5 - Computer Board * SCI Model 1000 Rev 3.0: Board 3 (Sect. 3.2 / 3.3)
Sequential Circuits Prophet-5 - Computer Board * SCI Model 1000 Rev 3.0: Board 3 (Sect. 3.3 / 3.4)
Sequential Circuits Prophet-5 - Digital Circuitry * SCI Model 1000 Rev 3.3: Part of the Rev 3.2 > Rev 3.3 Upgrade to Expand the Patch Memory
Sequential Circuits Prophet-5 - Analog Circuitry * SCI Model 1000 Rev 3.3: CEM 3310 Voltage Controlled Envelope Generators
Sequential Circuits Prophet-5 - CEM 3340 VCOs * SCI Model 1000 Rev 3.3: CEM 3340 Voltage Controlled Oscillators
  Computer Board  
  Computer Board  
  Computer Board  
  Digital Circuitry  
  Analog Circuitry  
  CEM 3340 VCOs  
Sequential Circuits Prophet-5 - D/A Converter * SCI Model 1000 Rev 3.3: Burr-Brown DAC71-CSB-I D/A Converter
Sequential Circuits Prophet-5 - VCO Scaling * SCI Model 1000 Rev 3.3: VCO Control Voltage Scaling, Two CVs per Div. Measured with a HP 54645D Scope at DAC Output (Multiplexed CVs)
Sequential Circuits Prophet-5 - D/A Converter * SCI Model 1000 Rev 3.3: D/A Converter Gain Adjustment (1V/Octave)
Sequential Circuits Prophet-5 - Computer Board * SCI Model 1000 Rev 2.0: Board 3
Sequential Circuits Prophet-5 - Voice Board * SCI Model 1000 Rev 2.0: Board 4
Sequential Circuits Prophet-5 - Voice Board * SCI Model 1000 Rev 2.0 - SSM2030, SSM2020, SSM2040 Integrated Circuits
  D/A Converter  
  VCO Scaling  
  D/A Converter  
  Computer Board  
  Voice Board  
  Voice Board  
Sequential Circuits Prophet-5 - SSM2030 VCOs * SCI Model 1000 Rev 2.0: SSM2030 VCOs with Tempco Resistors (Tel Labs Q81) Soldered Piggyback
Sequential Circuits Prophet-5 - SSM2030 VCOs * SCI Model 1000 Rev 2.0: SSM2030 VCOs with Tempco Resistors (Tel Labs Q81) Soldered Piggyback
Sequential Circuits Prophet-5 - D/A Converter * SCI Model 1000 Rev 2.0: Discrete Build 7-Bit D/A-Converter (R-2R Ladder) with a LM723 as Voltage Reference Generator
Sequential Circuits Prophet-5 - Board Sandwich * SCI Model 1000 Rev 2.0
Sequential Circuits Prophet-5 - SCI MIDI Kit * Original Sequential Circuits Prophet-5 MIDI Kit (SCI Model 841)
Sequential Circuits Prophet-5 - SCI MIDI Kit * Original Sequential Circuits Prophet-5 MIDI Kit (SCI Model 841): Component Side
  SSM2030 VCOs  
  SSM2030 VCOs  
  D/A Converter  
  Board Sandwich  
  SCI MIDI Kit  
  SCI MIDI Kit  
Sequential Circuits Prophet-5 - SCI MIDI Kit * Original Sequential Circuits Prophet-5 MIDI Kit (SCI Model 841): Soldering Side
Sequential Circuits Prophet-5 - SCI MIDI Kit * Original Sequential Circuits Prophet-5 MIDI Kit (SCI Model 841): Board Marking
Sequential Circuits Prophet-5 - Kenton MIDI Kit * SCI Model 1000 Rev 3.0
Sequential Circuits Prophet-5 - Lintronics MIDI Kit * …
Sequential Circuits Prophet-5 - Rear Jacks * SCI Model 1000 Rev 3.3: CV/Gate In, MIDI I/O, Audio Out
Sequential Circuits Prophet-5 - Power Supply * SCI Model 1000 Rev 3.3: Mains Transformer Section
  SCI MIDI Kit  
  SCI MIDI Kit  
  Kenton MIDI Kit  
  Lintronics MIDI Kit  
  Rear Jacks  
  Power Supply  
Sequential Circuits Prophet-5 - Power Supply * SCI Model 1000 Rev 2.0
Sequential Circuits Prophet-5 - Power Supply * A Rev 3.1 and Upwards PSU (New EPROM Type Needs no +12V and -5V Supplies)
Sequential Circuits Prophet-5 - RAM Replacement * SCI Model 1000 Rev 3.0: Replacing Faulty 6508-Type Memory ICs With One Single 2016-Type SRAM Chip
Sequential Circuits Prophet-5 - RAM Replacement * SCI Model 1000 Rev 3.0: Replacing Faulty 6508-Type Memory ICs With One Single 2016-Type SRAM Chip
Sequential Circuits Prophet-5 - RAM Replacement * SCI Model 1000 Rev 3.0: Replacing Faulty 6508-Type Memory ICs With One Single 2016-Type SRAM Chip
Sequential Circuits Prophet-5 - Board Marking * SCI Model 1000 Rev 2.0
  Power Supply  
  Power Supply  
  RAM Replacement  
  RAM Replacement  
  RAM Replacement  
  Board Marking  
Sequential Circuits Prophet-5 - Board Marking * SCI Model 1000 Rev 3.3: Voice Board Marking
Sequential Circuits Prophet-5 - Board Marking * SCI Model 1000 Rev 3.3: Computer Board Marking (Inverted Colors for Increased Visibility)
Sequential Circuits Prophet-5 - Board Marking * SCI Model 1000 Rev 2.0: Board Marking (Inverted Colors for Increased Visibility)
Sequential Circuits Prophet-5 - Mantra Code * Even the EPROM Contains the Tibetan Mantra «Om mani padme hung hrih» in its Code
Sequential Circuits Prophet-5 - Board Marking * SCI Model 1000 Rev 3.3: Computer Board Marking
Sequential Circuits Prophet-5 - Board Marking * SCI Model 1000 Rev 3.3: Computer Board Marking
  Board Marking  
  Board Marking  
  Board Marking  
  Mantra Code  
  Board Marking  
  Board Marking  


 
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