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Had to replace a PS-2 5V board in a Bipolar and did not think it would fit at first.  Definitely would not work with normal method.  The bracket would raise it too high, and the mount holes at the end of the bracket made it too long.  After studying for a while I decided to go with the Steam PS-2 3V bracket and mount the board upside down.

 

I had to trim the heat sink so that the edge would not make contact with the flat inductors on the board, cut off the end mounts of the plastic bracket.  I wound up with a profile height under 1.5 in which was necessary to fit under the shell.

 

Shell wound up fitting on easily.  Pictures attached.

 

G

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Originally Posted by gunrunnerjohn:

Nice clean job.  You'd think there's be more room in that particular locomotive.  I wonder why they thought it necessary to squeeze the electronics into one corner?  The speaker could have easily been on the opposite end I would imagine.

 

Why does your workbench have carpet on it.

 

The Bipolar has a smoke unit in the center and the battery and second motor at the other end.  They use a 16 pin harness and it all gets used.  So I think they run out of wires, hence why speaker is in with the board.

 

That is a towel.    G

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