>47 pF would be right and it was most likely put there to stop the op amp
>from oscillating, if needed.
>---------------------------------------------------------------------------
I wonder if the lack of said cap would account for the very intermittent
problem that I have on the X Axis on this board, namely the X Axis distorts
wildly from time to time. It's definitely something to do with the DAC
circuitry (curiously enough, prodding pin 16 of the DAC312 for the X Axis
temporarily 'resets' things and all looks good, until the next time). The
alphanumerics at the bottom of the test screen also gently slope upwards a
little as you look along to the right.
The 7815 regulator had blown on this board so no doubt that took out a few
things in the DAC section, but all the chips and transistors in this area
have now been replaced.
Phil
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Received on Sun Sep 3 15:42:06 2006
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