"Eeyore" wrote in
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robb wrote:

Thanks Tom,
i really appreciate any comments and help

i unsoldered one of the L298 and it has no shorts so now the
next
then i will do a trace of the 5V lines until i can learn
something usefull about the interconnections.

i hate working blind and re-tracing things when i could just
look
on a schemat.

I suggest you remove the 5V voltage regulator.. That'll remove
the connection
from the power supply to the digital section and NOW check for
a short across
the 5V and ground.

The regulator chip may have an internal short you see and it is
at least easy to
remove from the pcb.

Graham

hello graham,
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.
there is only one place i get a 619 ohm continuity check 5v-0v
test but every where else is 69/63/73

thanks for help graham iguess i just need to keep looking for the
bad components

my de-soldering bulb / iron makes clean quick work of it.

robb