Thanks for the reply,
Yes,it is strange.  I changed the electrolytic capacitor, but still the sam=
e.=20
Any further idea?
What values should I measure? Current?

BR,
J.


> That's strange. =A0I would try swapping out caps, especially if they are =
electrolytics. =A0Old electrolytic capacitors can cause funny problems that=
 are a bear to diagnose. =A0I try to stay away from aluminum and use cerami=
c or=A0tantalum=A0when at all=A0possible.
>=20

> >
> > I have a Linux embeded board that uses
> > FP6116 Asynchronous Step-Down Regulator
> > a datasheet is here
> > http://www.micro-bridge.com/data/Feeling-tech/FP6116.pdf
> >
> > In this design , that Asynchronous Step-Down Regulator should supply 1,=
2V for CPU on
> > this board.
> > It worked for some time but now it stopped.
> > So, I measured voltage and that Asynchronous Step-Down Regulator still =
supply 1.2V, yet
> > CPU does not start.
> > But when I use a different source of 1.2V, the CPU starts.
> > So, I am rather confused.
> > I can measure the same voltages, and more or less the same spikes( usin=
g oscilloscope), yet
> > different results.
> >
> > Can anyone suggest any solution to that problem?
> > Thanks
> > --
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