Zimo DCC info ?

[N_Cook]

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

 

[N_Cook]

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

 

[N_Cook]

cannot find reference to these boards on zimo.at

Has the same main connectors as this
Bachmann E-Z Command 8 Pin To 21 Pin Adaptor
http://images.nitrosell.com/product_images/11/2621/thumb-36-559.jpg
a bit bigger board plus outlet connectors, labelled on board, for LED1,
LED2, motor, R+ L- = rail pickups ?, Spk = speaker? and Aux1 which the
output of the 555 via the transitor goes to

21 pinning seems to agree this
http://www.bobclay.co.uk/smalldcc/dcc33.jpg

 

[Geo]

cannot find reference to these boards on zimo.at

Has the same main connectors as this
Bachmann E-Z Command 8 Pin To 21 Pin Adaptor
http://images.nitrosell.com/product_images/11/2621/thumb-36-559.jpg
a bit bigger board plus outlet connectors, labelled on board, for LED1,
LED2, motor, R+ L- = rail pickups ?, Spk = speaker? and Aux1 which the
output of the 555 via the transitor goes to

21 pinning seems to agree this
http://www.bobclay.co.uk/smalldcc/dcc33.jpg

Some connections here:-
http://www.bachmann.co.uk/pdfs/21pin_plug_wiring_diagram-1.pdf

Are you certain it is a Zimo board?

 

[N_Cook]

Some connections here:-
http://www.bachmann.co.uk/pdfs/21pin_plug_wiring_diagram-1.pdf

Are you certain it is a Zimo board?

Thanks for that , looks like the pinning here, maybe not Zimo.
The owner is out of contact at the moment. There are 6 of these duff boards.
Each in a little plastic box , and one had some blurb folded and fitting
inside the box, that was about Zimo sound files/codes or something in
German. Badly assembled probably by hand pick and place of components but
mainly bad lead-free solder of pins under the 21 pin header.

 

[Geo]

Thanks for that , looks like the pinning here, maybe not Zimo.
The owner is out of contact at the moment. There are 6 of these duff boards.
Each in a little plastic box , and one had some blurb folded and fitting
inside the box, that was about Zimo sound files/codes or something in
German. Badly assembled probably by hand pick and place of components but
mainly bad lead-free solder of pins under the 21 pin header.

Could be something simple to operate flashing light?
e.g:-
http://home.cogeco.ca/~rpaisley4/FredDCC.html