[sdiy] OT Roland W-30 displays

[grant at musictechnologiesgroup.com]

I can't say for sure, but judging by the part # it's probably a pretty
standard display (at least for the day). If someone can take a photo of
the chip-side of the board we could probably second-source it.

> -------- Original Message --------
> Subject: Re: [sdiy] OT Roland W-30 displays
> From: Ullrich Peter <Peter.Ullrich at kapsch.net>
> Date: Mon, February 28, 2011 6:21 am
> To: Neil Johnson <neil.johnson97 at ntlworld.com>, Gordon JC Pearce
> <gordonjcp at gjcp.net>
> Cc: "synth-diy at dropmix.xs4all.nl" <synth-diy at dropmix.xs4all.nl>
> 
> 
> Hi!
> 
> The W30 Service manual says that it is a LM240142 LCD (PN RL-15029487 from ROLAND).
> If you need I could give you the LCD module pinout out of the schematics.
> But I found no datasheet for the display.
> 
> Replacement displays are available here but very expensive:
> http://www.vintageplanet.nl/pages/roland.html look for "LM240142"
> 
> Ciao
> Peter
> 
> 
> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Neil Johnson
> Sent: Monday, February 28, 2011 2:30 PM
> To: Gordon JC Pearce
> Cc: synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] OT Roland W-30 displays
> 
> Gordon,
> 
> > I picked up a W-30 at the weekend, but its display was intermittently
> > scrambled and got worse and worse as time went on.  It appears to have been
> > replaced with a different display, with some fairly rough soldering.  I
> > suspect something on the display PCB is knackered.
> >
> > Can I just replace it with any 240x64 graphical LCD that uses the same
> > controller, or is there something "magic" about it?
> 
> I don't believe there is anything special about the particular one in
> the W-30.  As long as it has the exact same register API as the old
> one then it stands a good chance of working.  Try it out and see what
> happens!  At worst you'll get a blank display or garbled display.  Oh,
> and the display driver in is EPROM, not on disk, so tricky to update.
> 
> Cheers,
> Neil
> -- 
> http://www.njohnson.co.uk
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