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I am attempting to put a Protsound 1 board in a weaver U25b.  The board came out of a Weaver SD40-2.  I can't identify where the track power connects to, or how to mount it.  More detailed pictures can be added by request.  Any help is appreciated.

The U-25b:

P5040088

The new board:

P5040089

The old board:

P5040090

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Images (3)
  • P5040088
  • P5040089
  • P5040090
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Can you get a pic of the bottom  of the new  dcru ? Orange (center rail ) and brown (outside rail)wires   were at one time QSI colours. However you may have a little more than that  to worry about . There's probably a voltage regulator that must be insulated from  the chassis. It's also   part of the mounting bracket on some engines.

 

DCRU = DC current Reverse Unit. That is the bottom board. A full-wave bridge rectifier sends DC current to can motor(s).

QSIndustries began with ACRU's for Lionel postwar locomotives. Early instructions explained how to cut a trace underneath and add a full-wave bridge rectifier for locomotives with DC can motors that were just coming out.

Nice to see someone just get it done - work through it, scratch your head, ask questions. Now, just think how easy the next project like this will be...uh-oh!

BTW, as often as not, I will use double-sided tape to attach electronic components, depending on everything; it's legit.

Last edited by D500

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