Roland Fantom XR. Help with LCD screen pinouts

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  • maleksa
    Senior Member
    • Jul 2017
    • 50
    • Malaysia
    #1

    Roland Fantom XR. Help with LCD screen pinouts

    The LCD screen on my Roland Fantom XR rack synthesizer has gone blank. I managed to get the schematics for the connection to the LCD.

    The standard LCD has D0 to D7 pinouts (in addition to the normal VDD, VSS, CS, RES, RW, EN etc).

    Can someone help me to identify what V1 to VR is for? Also how does VR work?

    Any help is truly much appreciated.
    Attached Files
    Tags: None
    • stj
      Great Sage 齊天大聖
      • Dec 2009
      • 30965
      • Albion
      #2
      can you see what the chip(s) are on the display or are they just blobs of resin?
      it looks like a hitachi standard interface but with a lor of the voltage bits off the display board.

      read this datasheet to learn a lot about how they work
      Attached Files

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        • truclacicr
          Badcaps Veteran
          • Apr 2019
          • 297
          • australia
          #3
          See https://www.hpinfotech.ro/SED1530.pdf

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