AW: AW: [sdiy] Prophet 600

[Ullrich Peter]

Sorry, I have never had a closer look at these schematics.

Maybe you can find some help on this page:

http://www.geocities.com/SoHo/2163/sc.html

Ciao
Peter

http://www.ullrich.at.tt

________________________________________
Von: synth-diy-bounces at dropmix.xs4all.nl [synth-diy-bounces at dropmix.xs4all.nl] im Auftrag von Csaba Zvekan [czvekan at gmail.com]
Gesendet: Montag, 02. Juni 2008 22:24
An: Synth-diy at dropmix.xs4all.nl
Betreff: Re: AW: [sdiy] Prophet 600

Thank you Pete and thank you Bob,

I have looked at  both of your Prophet 600 Schematics. But I already
had those exact ones. The Board 1 and Board 2 are not scanned and not
covered. And unfortunately I was interested to look at Board 1 schema.
That's where the Potis and Switches and so on are. I am having some
difficulties narrowing down the problem. I have some weird behavior
with Voice 3b . Ever since I replaced the DAC71 and tweaked on the
R4333 something happend and I don' t know how to adjust the poti
properly . Sometimes I think I have it just to realize that this VOICE
3b is of in the last octave but only if I have frequency  >6 - 10. I
have replaced U423 thinking the OP-AMP might be bad, Then I replaced
U416. Tomorrow I will replace the CE3340 just the see if maybe that is
Bad . But I  doubt it it the .I suspect some 4000 series CMOS on Board
1. There are a few. That demux the frequencies of VoicesA and VoicesB
and fine tuneB.
I think I'm gonna order the Technical Manual straight from
WineCountrySequential. It's like 24$ but oh well. I can't be that
cheap :).
I will need in the future and synth deserves it.
So thank you again you guys been very nice and fast in helping me.


Csaba


On Jun 2, 2008, at 9:41 PM, Ullrich Peter wrote:

>
>> Does anybody have the Prophet 600 Technical/Service manual as a pdf
>> or file ?
>
> Just for information: I already sent him the schematics today per
> private email.
>
> Ciao
> Peter
>
> http://www.ullrich.at.tt
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy






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