Cgs synth

>
>
> This question is regarding the components around the reset input on
>the 'M' board. I have REV1.4 pcb. Some component connections are
>different than the schematic. For instance: At the junction of the
>reset input-100K to gnd-10n cap there is a diode (anode) connected
>with cathode to +V. There's a couple others but It's hard to put
>schematics into words.
> Are these improvements on the design and the schematics are not yet
>updated or do I need to make adjustments to the pcb.
>
>Thanks,
>P.v3
>
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>
>
>See the following URLS for the CGS Modular Synth home page:
>Main: http://www.cgs.synth.net/
>Secondary: http://otherunicorn.0catch.com/synth/
>Yahoo! Groups Links
>
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>

--- In cgs_synth@yahoogroups.com, sasami@h... wrote:
>
> Hmm.... interesting.....
>
> Just built it as is. 1.4 is the latest revision. I don't remember
why that
> diode was added. It prevents the reset pulse from being greater
than the
> supply voltage. It may have been added for a case when the engine
was being
> run off a lower voltage than the rest of the synth, or it may be an
artifact
> left over from the revision process. The truth is I don't remember.
>
> Ken
>
> >
> >
> > This question is regarding the components around the reset input
on
> >the 'M' board. I have REV1.4 pcb. Some component connections are
> >different than the schematic. For instance: At the junction of the
> >reset input-100K to gnd-10n cap there is a diode (anode)
connected
> >with cathode to +V. There's a couple others but It's hard to put
> >schematics into words.
> > Are these improvements on the design and the schematics are not
yet
> >updated or do I need to make adjustments to the pcb.
> >
> >Thanks,
> >P.v3
> >
> >
> >
> >
> >
> >
> >See the following URLS for the CGS Modular Synth home page:
> >Main: http://www.cgs.synth.net/
> >Secondary: http://otherunicorn.0catch.com/synth/
> >Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
> >
>
______________________________________________________________________
_
> Ken Stone sasami@h... or sasami@c...
> Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
> Australian Miniature Horses & Ponies
<http://www.blaze.net.au/~sasami/>

>
>
>There's two more differences between this pcb and schematic. I'm not
>sure if the differences will matter, so I'll ask.
> In the reset area of schematic shows: 15V to 110n cap, other side
>of cap to 100K-gnd and the anode of diode. Cathode is connected to
>junction of pin3 of opamp, 100k to ground and a 15K. The pcb has the
>cathode connected to the other side of the 15K resistor (junction of
>the 15K resistor and the 10n cap). PCB is connected before the 15K
>resistor, the schematic is connected after the 15K.
>
> The next difference has to do with the End Out section. Schematic
>shows emitter through 1K resistor, then to the end out jack, and a
>10K to ground. On the pcb the emitter connects to both the 1K and 10K.
>
> Can you forsee any problems ? It looks pretty easy to mod the pcb
>if necessary...I'd just rather do it before I get everything soldered
>in.
>
>Thanks,
>P.v3
>
>