STUDIO REPAIR » Lexicon » 224 - Digital Reverberator  (30 Slides)     [Page 1 of 1] :: Jump To  
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Lexicon 224 - One of the First Digital Reverberators. Unveiled at the AES Show in 1978.
 
Lexicon 224 - Digital Reverb * The 224 with the remote control unit.
Lexicon 224 - Digital Reverb * Up and running…
Lexicon 224 - Remote Control * …
Lexicon 224 - Rear View * …
Lexicon 224 - Mainframe Front * …
Lexicon 224 - Logotype * …
  Digital Reverb  
  Digital Reverb  
  Remote Control  
  Rear View  
  Mainframe Front  
  Logotype  
Lexicon 224 - Remote Control * Side view.
Lexicon 224 - Remote Control * Upper panel view.
Lexicon 224 - Remote Control * Lower panel view.
Lexicon 224 - Remote Control * Rear view.
Lexicon 224 - Mainframe * The mainframe with front panel removed.
Lexicon 224 - Circuit Boards * The circuit boards fitted in the mainframe.
  Remote Control  
  Remote Control  
  Remote Control  
  Remote Control  
  Mainframe  
  Circuit Boards  
Lexicon 224 - PCB Stack Order * …
Lexicon 224 - Output Transformer * …
Lexicon 224 - Power Supply * Power supply circuitry.
Lexicon 224 - Microcomputer * The system is hosted by a National Semiconductor Board Level Computer (BLC) featuring a generic 8080 CPU with onboard RAM, ROM and peripherals. Neither designed nor made by Lexicon.
Lexicon 224 - DMEM Circuit Board * DMEM card - Data memory and I/O circuitry. Component side.
Lexicon 224 - DMEM Circuit Board * DMEM card - Data memory and I/O circuitry. Solder side.
  PCB Stack Order  
  Output Transformer  
  Power Supply  
  Microcomputer  
  DMEM Circuit Board  
  DMEM Circuit Board  
Lexicon 224 - T&C Circuit Board * T&C card - Timing and control circuitry. Component side.
Lexicon 224 - ARU Circuit Board * ARU card - Arithmetic and register circuitry. This is the place where the numbers are crunched…
Lexicon 224 - ARU Circuit Board * ARU card - Arithmetic and register circuitry. Solder side.
Lexicon 224 - FPC Circuit Board * FPC card - Floating point converter circuitry. Component side.
Lexicon 224 - FPC Circuit Board * FPC card - Floating point converter circuitry. Solder side.
Lexicon 224 - A/D Converter Board * AIN card - Analog input circuitry. A/D converting the old-school way: a DAC (Burr Brown DAC800) in conjunction with a successive approximation register (National Semiconductor DM2504) and a comparator (LM211). Component side.
  T&C Circuit Board  
  ARU Circuit Board  
  ARU Circuit Board  
  FPC Circuit Board  
  FPC Circuit Board  
  A/D Converter Board  
Lexicon 224 - A/D Converter Board * AIN card - Analog input circuitry. Solder side.
Lexicon 224 - D/A Converter Board * AOUT card - Analog output circuitry featuring a Burr Brown DAC80-CBI-V converter. Component side.
Lexicon 224 - D/A Converter Board * AOUT card - Analog output circuitry. Solder side.
Lexicon 224 - A/D Converter * AIN card - Analog input circuitry. The DAC800 with its DM2504 successive approximation register companion.
Lexicon 224 - D/A Converter * AOUT card - Analog output circuitry featuring a Burr Brown DAC80-CBI-V converter.
Lexicon 224 - Remote Control PCB * …
  A/D Converter Board  
  D/A Converter Board  
  D/A Converter Board  
  A/D Converter  
  D/A Converter  
  Remote Control PCB  

 
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