[sdiy] DIY Roland M-64C cartridge ?

[Ullrich Peter]

Hi!

The schematics of the M-16C cartridge can be found in the
Roland GR-700 Service Manual on page 23 and 24:

http://manuals.fdiskc.com/flat/Roland%20GR-700%20Service%20Manual.pdf

Ciao
Peter

http://www.ullrich.at.tt


-----Ursprüngliche Nachricht-----
Von: synth-diy-bounces at dropmix.xs4all.nl [mailto:synth-diy-bounces at dropmix.xs4all.nl] Im Auftrag von Tom Wiltshire
Gesendet: Donnerstag, 25. September 2008 15:50
An: ChristianH
Cc: synth-diy at dropmix.xs4all.nl
Betreff: Re: [sdiy] DIY Roland M-64C cartridge ?


Nice work finding that, Christian.

That looks simple enough. There isn't much inside it; the RAM, a backup cell + diode, SIL pull up resistor, bypass cap and a couple of other resistors and capacitors.

I did wonder at Roland making a different PCB for the M-16C version though, if the M-64C has an extra few pins on the RAM.
I'd have thought they'd be identical except for the larger RAM chip.
Just goes to show that sometimes things aren't as straightforward as you think they should be!

T.

On 25 Sep 2008, at 10:05, ChristianH wrote:

> Have you guys seen this?
> http://wolzow.mindworks.ee/analog/jx-10-m-16c.htm
>
> Christian
>
>
>
> On Wed, 24 Sep 2008 19:01:31 -0700 (PDT) "Gil W." <gil_we at yahoo.com>
> wrote:
>
>> Well I just got one of these M-64C and already have a M-16C here...
>>
>> I think I'll part them out and reverse engineer... Maybe make a few
>> and sell over on ebay, that could be awesome as they are so rare and
>> pricey to get  !
>>
>> ;)
>>

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