Remove the LED from longer hood end of board and save it for later.
Decoder wire lengths:
7/8" inch - Red, Black
1 inch - Orange, Gray, Blue
1-1/4 inch - White
1-3/8 inch - Yellow
Scrape off the green coating from the circuit traces near the frame contacts on the LED
board to expose bare copper and solder the red and black wires, observe polarity.
This motor design has a small PC board with two contacts sticking up. Cut these contacts to about half their original length.
Cut two lengths of 3/32 inch heat shrink about 3/16 inch long and place these over the gray and orange decoder wires.
Solder the orange and gray wires to the shortened motor contacts. Use a low heat setting and be extra careful about the heat being so close to the motor housing. Observe the correct polarity of the wires.
Slide the heat shrink down over the soldered connection and apply heat from a heat shrink gun.Again, be careful of damaging the motor housing.
This is what the completed decoder assembly should look like with the PC board, motor, and front LED connected.
Notice the small red band over the wires near the decoder. I've found that is helps protect the wires connections to the decoder while handling. This can be cut with with small scissors and removed after the decoder is in place
|When re-assembling the engine it is very important to get all 4 of the motor saddle tabs properly into the notches on the frame.|
The Lenz decoder does not have any insulation over it the way a other brands do so we need to insulate the frame where the decoder is going to be.
Place a piece of 1/2 inch Kapton tape on the top
of the front section of frame. Trim any excess from the sides.
If the shell will not go down all the way, the LED on the board may not be properly aligned. There is a black plastic light shroud inside the shell at the hood end. Fish it out and carve a notch in it as shown. This should allow the shell to go down all the way. Put it back into the shell as it was before. Try installing the shell again.
Decoder boards made specifically for this model have been available for some time now but in case you ever want to try a wired decoder this is how it's done.