Re: gEDA-user: buzzing board

[Steve Meier <smeier@xxxxxxxxxxxxxxxxxxx>]

Or, try lifting the power pins one component at a time. And if it buzzes
it must be oscillating and should be viewable with your oscope. 

Steve M.


On Thu, 2007-09-13 at 20:42 -0400, Randall Nortman wrote:
> On Thu, Sep 13, 2007 at 08:35:35PM -0400, evan foss wrote:
> > I have had audio amplifiers and large transistors in general buzz on
> > their own. Are you sure it is really on standby?
> 
> One good way to address this and other such possibilities would be to
> start de-soldering each component that is not strictly necessary to
> drive the OLED.  Do them one at a time, and test between each one.
> Sounds like a fun way to spend an afternoon.  If you have a spare
> board and components, it might be easier to start from scratch, and
> add one thing at a time.  (Which would also help catch bad solder
> joints.)
> 
> If you get down to just the CPU, OLED, and required support
> components, I would go so far as to remove the CPU and its required
> components, and solder on wires to drive the OLED from off-board.
> Then you'd have it pretty well narrowed down, I'd say.
> 



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