STUDIO REPAIR » Roland » JD-800  (40 Slides)     [Page 1 of 1] :: Jump To  
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Roland JD-800 - Digital synthesizer released in 1991
 
Roland JD-800 - Top View * …
Roland JD-800 - Top View * …
Roland JD-800 - Display * Combined LED and LC display
Roland JD-800 - Buttons * …
Roland JD-800 - Logo * …
Roland JD-800 - Rear * …
  Top View  
  Top View  
  Display  
  Buttons  
  Logo  
  Rear  
Roland JD-800 - 7-Segments * …
Roland JD-800 - Sliders * …
Roland JD-800 - LC Display * LCD showing the data transfer menu
Roland JD-800 - LC Display * …
Roland JD-800 - Guts * …
Roland JD-800 - PCBs * …
  7-Segments  
  Sliders  
  LC Display  
  LC Display  
  Guts  
  PCBs  
Roland JD-800 - Panel PCB * The left one of the two panel PCBs
Roland JD-800 - Card Slot * …
Roland JD-800 - Guts * …
Roland JD-800 - Opened * …
Roland JD-800 - PCBs * …
Roland JD-800 - Main Board * …
  Panel PCB  
  Card Slot  
  Guts  
  Opened  
  PCBs  
  Main Board  
Roland JD-800 - Opened * …
Roland JD-800 - Panel Taken Apart * …
Roland JD-800 - Jack PCB * The jack PCB contains all analog circuitry and the PCM61 DAC.
Roland JD-800 - DAC * The Burr-Brown/TI PCM61 18-bit DAC
Roland JD-800 - DAC Adjustment * Probing the test signal that the JD-800 generates during its DAC adjustment procedure. The DSO is a HP 54645D.
Roland JD-800 - DAC Adjustment * This is the sinus test signal that the JD-800 generates during its DAC adjustment procedure - you have to adjust it to the best sounding result without distortion. Screencopy shot from a HP 54645D digital storage oscilloscope.
  Opened  
  Panel Taken Apart  
  Jack PCB  
  DAC  
  DAC Adjustment  
  DAC Adjustment  
Roland JD-800 - Panel PCB * The right one of the two panel PCBs
Roland JD-800 - Panel Taken Apart * …
Roland JD-800 - Slider * …
Roland JD-800 - Power Supply * Classic PSU with integrated linear regulators
Roland JD-800 - H8 Microcontroller * Hitachi H8-Family MCU
Roland JD-800 - System RAM * …
  Panel PCB  
  Panel Taken Apart  
  Slider  
  Power Supply  
  H8 Microcontroller  
  System RAM  
Roland JD-800 - FX Processor * …
Roland JD-800 - FX RAM * Effect processor's RAM
Roland JD-800 - Sharp LCD * …
Roland JD-800 - EPROM * …
Roland JD-800 - JD-800 Kills! * …
Roland JD-800 - Keyboard * …
  FX Processor  
  FX RAM  
  Sharp LCD  
  EPROM  
  JD-800 Kills!  
  Keyboard  
Roland JD-800 - Picture * …
Roland JD-800 - Picture * …
Roland JD-800 - Opened * …
Roland JD-800 - Keyboard * …
  Picture  
  Picture  
  Opened  
  Keyboard  

 
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