SH-101 repair help

[Anders Westerberg]

Any SH-101 experts out there? I bought a red SH-101 in excellent
condition a week ago, unfortunately it suddenly stopped working after
only two days :-( .
The VCO is running at 50.000Hz all the time and seems to be (slightly)
affected by bender, range, transpose and keyboard actions and also by
the LFO. However, the control voltage at the VCO doesn't seem to deviate 
much from 0 Volts.
The voltage from the D/A-converter to the VCO is permanently 1.0 Volt
(also if VCO disconnected), while the parallell CV OUT voltage (coming
from the same multiplexer) is showing correct values.
I've done the D/A adjustment procedure, everything OK.

Any help welcome.

regards,


        Anders Westerberg
        Halmstad, Sweden
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