Since both channels behave the same, I might suspect
the regulated reference voltage (12 V+ and 12 V-)
supplied by U6 and U8. Check the voltage present at
the each end of the pots. If I am doing the math
right, you should have about +5.1 VDC on one side and
-5.1 VDC on the other side. If you don't have that,
check your regulators U6 and U8. Are the inserted
correctly? What is the voltage on the ouput pins?
Larry
---
elhardt@... wrote:
> Everything else in my blue case seems to work fine,
> except the behavior of probably the simplest module
> (MOTM-700) is strange. ....snip....
> But I have to set the knob/switches down to
> between -4 and -5 to see that happen.
> With no cable in the CV input, I can't turn the
> switch and see the LEDs flip as the manual
> indicates. There are no adjustments on the
> board. Both channels behave exactly the same.
> -Elhardt
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