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Re: [dotcomformat] Re: Help! Debugging a newly assembled MOTM Ultra 300 VCO

2011-11-10 by Mark Rivera

> What would constitute overly warm in a chip?

Overly warm:  either uncomfortable for a finger placed on top, or
noticeably hotter than the other chips on the board. If so, disconnect
power immediately. It indicates a short circuit.


Power rail checking: Fourth bullet point here:
http://musicfromouterspace.com/index.php?MAINTAB=SYNTHDIY&VPW=1920&VPH=768

If the power rails are okay (i.e., 15V and -15V) then it is something
else. If they are not +/- 15V, then immediately turn off power. Check
for shorts with a magnifying glass under at least two different light
sources and angles. Shiny solder can be deceiving under certain
lights/angles of view.


Go through that whole document at
http://musicfromouterspace.com/index.php?MAINTAB=SYNTHDIY&VPW=1920&VPH=768

hth,
Mark

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