On Nov 7, 12:57 pm, "robb" wrote:
wrote in message

ups.com... On Nov 7, 7:46 am, "robb" wrote:
no shorts on any of the power regulator chips 5v L387 or the
L298s

and still get 76 ohm continuity between 5v an 0v ref.

Ummm, what's wrong with that? I = E/R: 66mA. This
(static) current isn't blowing the fuse.

TM

oh yes the fuses blow.

ther were 3 bussman fuses on different lines and such and they
are all blown

right now i am trying to track down the short(S) so i ca do
better static tests on various components without removing and
then try and power the board back up and look for other problems

I wasn't denying that the fuses are blowing - I was pointing out that
76 ohms is not a short (for most any low voltage power supply), and
that the fuses aren't blowing due to that (not so low) resistance
across
5V.

What resistance do you get on the other rails?

TM