wrote in message
...
On May 13, 2:12 pm, "N_Cook" wrote:
I'm an electronic engineer asked to repair a number of these DCC control
boards
that apparently plug into/under model train locos. I've found a few
failings
testing cold but would like to apply some power to them.
Anyone know of "block diagram" pinning for such units or any technical
info?
Boards are 32x30mm with surface mount components , 2x4 way connector, 21
way
conn, 5 x 2way and 1x 4w connector

Send them back to Zimo, I've had free repairs in the past. If you need
to replace the PIC, where are you going to get the firmware?

MBQ

+++++

Marked 2395 X002 on the overlay
they are some sort of interface board, no PIC, only a 555 , one transistor
and a number of diodes and passives and all those connectors. So far 2 have
had duff lead-free soldering