S-Helper Service Locomotive | SW1 | Electrical

Manufacturer:

S-Helper Service

Product Category:

Locomotive

Model Name:

SW1

Notes Type:

Electrical

Title:

Printed Circuit Boards

File:

AC Reverse Unit Schematic

This circuit board is for the AC or DC powered, non-sound version (part #662-X002R1).

Self-tapping screw for contact strip.

The remainder of the photos apply only to the DC versions of these engines; AC and DCC locomotives were unaffected. For DC versions, Don Thompson reports that there were two kinds of eight-pin DC shorting plugs. They will both work, but one will cause the engine so run in the opposite direction. This first photo shows the normal DC shorting plug for engines without a speaker (part #653-X00???).

This photo shows the normal DC shorting plug for engines with a speaker (part #653-X014R4).

For some reason, the factory, on the entire run of the SW1 engines, wired the motors to the wrong socket. The fix was a DC shorting plug with the motor lead pins wired correctly. These plugs have a glob of hot-melt on top. In the photo, you can see red wires in the hot-melt. Note that these boards with the red wires were for the SW9. The boards for the SW1 have baby-blue wires (no photo available of those).