Question about Lionel TMCC boards

quote:

As your looking at the DCDR, with the white four pin connector on the upper right hand corner and the black molex connector on the bottom this is how it should be wired,

White Connector, first pin reading left to right

goes to pin 18 on R2LC (FWD PWM)

second, pin 19, 20 on R2LC (5vdc)

third, pin 16 on R2LC (Reverse PWM)

forth, pin 19, 20 on R2LC (5vdc)


Black Molex Connector


Upper left corner Grd, Outside Rail
Upper Right corner Power center rail

Bottom two are for motor.

quote:

Originally posted by gunrunnerjohn:
You can get a DCDR plain board, AAMOF I'd swap you a working one from an ERR install for your DCDR-S just to have a spare for my Odyssey locomotives.

Bringing this topic back to the top because I finally got around to starting my TMCC project. 

Bill,

The wiring depicted above does not match the Lionel wiring diagram. In fact it seems like a mirror image. 

On the black molex connector:

Upper left is AC center rail, red. 

Upper right is AC outer rail, black. 

The white connector wires are like this:

Left to right. 

Pink, blue, pink, yellow. 

Can you confirm if the pink wires are what connect to R2LC pins 19,20 +5v ?

I'd be a little careful about going just on the wire colors.  They should be consistent, but I've seen examples where they were not.  Note that pin 1 on the connector in question should have a square pad on the PCB.  Pin one is away from the edge of the board.

Pins 1 & 3 are the +5V power to the board.  The other two are the PWM speed/direction inputs.  That's what they are on the DCDR as well.

I don't know of a way to run the locomotive without the motor encoder working, my solution would be to stick a DCDR in place of the DCDR-S.

Ok John, is see the problem now.

We are looking at two different boards.

Yours is a DCDR-S.

Mine is a DCDR.

As long as we can agree that pin 1 is the square pad and both pins 1 and 3 are +5v I think we will be ok.

Flash

   In my explanation above I said as your looking at the DCDR the white connector it will be in the upper right hand corner.You are looking at the back side which is fine. Also I said the first pin is forward, its not, its reverse.

Bill

Yes, pin one is always the square pad, or at least in every example I've looked at.   you mentioned the DCDR-S in a query in the thread, so that's why I presented that one.