[sdiy] MonoPoly SSM2033 Insanity

mark verbos markverbos at gmail.com
Mon Feb 24 13:34:17 CET 2020


Are your power rails at the correct voltage? It seems odd that all 4 VCOs would be way out of range and by the same amount.



Mark





> On Feb 23, 2020, at 11:21 PM, Randel Osborne <randel at redshift-consulting.com> wrote:
> 
> Hello-
> 
> I have a MonoPoly on the repair bench that has me baffled.
> 
> All oscillators output the appropriate waveforms, but at 32KHz, and don’t keyboard track.
> 
> All CVs leading to the 2033 are as expected.
> 
> Pin 5 of the SSM2033 is CV in, as per the spec sheet.
> 
> Pin 5 is not connected to the circuit board. There isn’t even a solder pad. This is the same for all 4 oscillators.
> 
> Pin 5 is not connected to the CV on the schematics, although it comes really close, and looks like it should be.
> 
> What am I missing?
> 
> Does anyone have any experience with this beast?
> 
> Thanks.
> 
> 
> -Randel
> 
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