[sdiy] Repair help Waldorf Chord Gekko

[MTG]

Curious that they seem to neglect the MIDI spec current loop somehow...

GB
www.musictechnologiesgroup.com


----- Original Message ----- 
From: "Ullrich Peter" <Peter.Ullrich at kapsch.net>
To: "Tom Wiltshire" <tom at electricdruid.net>; "Sam Ecoff" 
<sam at synthasonic.com>
Cc: "sdiy DIY" <synth-diy at dropmix.xs4all.nl>
Sent: Friday, April 22, 2011 2:20 AM
Subject: Re: [sdiy] Repair help Waldorf Chord Gekko


> You can see pictures of the old Gekko Hardware here:
> http://pics.studiorepair.de/Waldorf/Gecko/slides/Waldorf_Gecko_PCB.html
>
> At least the Gekko Chord and Arpeggio used this hardware.
> Maybe also the Gekko Trigger...
>
> Ciao
> Peter
>
> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl 
> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Ullrich Peter
> Sent: Thursday, April 21, 2011 10:27 PM
> To: Tom Wiltshire; Sam Ecoff
> Cc: sdiy DIY
> Subject: Re: [sdiy] Repair help Waldorf Chord Gekko
>
> Hi!
>
> Interesting that the newer Gekkos use PIC processors as the old Gekko 
> Chord used a 8031 microcontroller and an external eprom...
>
> Ciao
> Peter
> ________________________________________
> Von: synth-diy-bounces at dropmix.xs4all.nl 
> [synth-diy-bounces at dropmix.xs4all.nl] im Auftrag von Tom Wiltshire 
> [tom at electricdruid.net]
> Gesendet: Donnerstag, 21. April 2011 19:44
> An: Sam Ecoff
> Cc: sdiy DIY
> Betreff: Re: [sdiy] Repair help Waldorf Chord Gekko
>
> It was my understanding that the 16C parts are one-time programmable, so 
> if the chip is scrambled, it might stay scrambled. That said, you could 
> probably replace it with a 16F part. On the page on Microchip's website, 
> they suggest the PIC16F723A, but I haven't checked whether it'd be 
> pin-for-pin compatible or if it just has the same features.
>
> http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en010145
>
>
> HTH,
> Tom
>
> On 21 Apr 2011, at 18:00, Sam Ecoff wrote:
>
>> Discovered today that my beloved Waldorf Chord Gekko is hosed. (It's a 
>> MIDI widget that basically adds chord memory function to any MIDI 
>> keyboard see here: 
>> http://matrixsynth.blogspot.com/2008/01/waldorf-gekko-midi-chord-memorizer.html ) 
>> I think that the PIC in it got screwed up somehow. It's a 16LC63A. I 
>> don't suppose anybody on the list can point me to someplace that might 
>> have code for this bugger?
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