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Path: utzoo!watmath!clyde!cbosgd!ihnp4!ihlpm!michael1
From: michael1@ihlpm.UUCP (pula)
Newsgroups: net.music.synth
Subject: Re: Velocity sensitive upgrade for JX3-P
Message-ID: <485@ihlpm.UUCP>
Date: Tue, 17-Sep-85 15:17:08 EDT
Article-I.D.: ihlpm.485
Posted: Tue Sep 17 15:17:08 1985
Date-Received: Wed, 18-Sep-85 04:18:29 EDT
References: <442@decwrl.UUCP>
Organization: AT&T Bell Laboratories
Lines: 33

> I was down to one of the local stores and the guy running the store said 
> that they had a velocity sensitive upgrade for the JX3. What this does 
> is it makes the JX3 sound velocity sensitive when driven via MIDI by a
> velocity sensitive keyboard. This upgrade costs $120. It consists of 
> adding an EPROM to the synth. A bit expensive eh? I told the guy I could 
> solder myself, he refuses to sell me just the part. Is this part 
> available through Roland? He wouldn't tell me where he gets them.
> 
> Dave Bottom

    Yes Roland does sell the upgrade directly.  I bought and installed
  it myself about 4 months ago.  If you bought your JX-3P new, you should 
  probably be getting copies of RUG (Roland Users Group) magazine.  The
  upgrade is listed in the back for @ $50.00.  Be careful!  The JX-3P is
  not fun to take apart and I do mean take apart!  The PROM which you need
  to replace is located in an akward position.  The instructions which
  accompany the new PROM are translated from Japanese and require a little
  thought to figure out what is meant.  After that the installation is
  straight forward.  A single jumper is required from the new PROM to an
  existing ROM.  

    The mod does work.  As Dave said, this chip will not make your JX-3P
  keyboard velocity sensitive, only the MIDI input.  It should also be noted
  (and I didn't know this when I bought the mod), that in velocity mode,
  the JX-3P keyboard is disabled and can only be re-enabled by power-cycling
  the JX-3P!  So if you've got a JX-3P lying around (probably because you
  can't sell it for any fraction of what you paid (-:) this mod is probably
  for you.  Also, I don't have the Roland info, so I'll try to dig that up
  in the near future.

-- 

!ihnp4!ihlpm!michael1