R: overall schematic vs. individual board schematics - Re: [yamahacs80] Preset T boards map
2011-03-15 by faxiomas@virgilio.it
Hi David
I'll make a comparative by tracing the resistors, these mistakes suck big time! I wouldn't find myself in trouble while in need to change anything in the T-boards area; suffice to say I found oddities like voltage 0V in correspondance with FUNKY3 LPF's cutoff, along with several differences in envelope timings, both with filter and volume envelopes; besides, I found mistakes even in the big diagram, for example I found a feedback track in the BBD which isn't in another version of the diagram (latter is the right one)!M
----Messaggio originale----
Da: david@...
Data: 15-mar-2011 2.45
A: <yamahacs80@yahoogroups.com>
Ogg: overall schematic vs. individual board schematics - Re: [yamahacs80] Preset T boards map
----Messaggio originale----
Da: david@...
Data: 15-mar-2011 2.45
A: <yamahacs80@yahoogroups.com>
Ogg: overall schematic vs. individual board schematics - Re: [yamahacs80] Preset T boards map
> Max Fazio <mailto:faxiomas@virgilio.it>
> March 14, 2011 4:07 PM
>
>
> Hi everybody: I'm in need of a tech who can address me to some which I
> believe to be mistakes inside the service manual; mostly I'm trying to
> catch the parameters for some of the presets by reading the resistance
> values on the diagrams but I get lost when comparing some of the
> parameters set in the "T" boards, from 51 to 54; the BRASSes for
> example look completely different in the diagrams and feel far from
> their audio counterparts, in facts their envelope times seem much
> slower than on an actual machine; some other doubts I have when
> comparing BASS, ORGANs etc. Now my friend Patrice compiled a table of
> voltages representing the parameters ; does anybody have a correct
> diagram with the exact values avaliable so I can compare them?
>
> ----------------------------------------------------------
Max,
I don't know about this particular case, but I've found that every time
I've seen an error in the CS80 schematic pages, the giant, fold-out
schematic was correct! Try checking that.
David
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