Conversion of a Minitrix Class 27 to DCC.

Dateline 20th September 2005

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taken on 24th March 2005

As with all conversions remove the body retaining screws and lift off the body.

taken on 24th March 2005

This circuit board has the resistors for the lights. As I would not be using the lights I removed the resistors and the wires.

taken on 24th March 2005

Remove the four small screws to release the motor. The right hand mounting plate is fixed to the motor but the left hand mounting plate is free.

taken on 24th March 2005

This small circuit board carries the two contacts that tranfer the power to the motor. THEY MUST BE INSULATED.

I know this is not the best picture but at the bottom - as you look at the picture - is in contact with the metal frame.
As I had no intention of reverting to dc I removed most of the two contacts and the covered the remainder with insulating tape.

taken on 24th March 2005

This is the motor showing the two terminals. Attach the orange and grey wires.
For this conversion I used a Digitrax DZ121 which I had spare in my decoder box. To save space I removed the function wires from the decoder.

taken on 24th March 2005

With the small circuit board removed the contacts attached the bogies can be seen. These wipe on the on the metal H on the reverse of the small circuit board (see the picture below).

taken on 24th March 2005

This is the reverse of the small circuit board which has the suppression components. I removed these It goes without saying but clean up the H shaped metal as this is where the power gets transferred from the bogie pickups. At the top edge of the board it the pickup which touches the body frame for power transfer. So connect the Red to H and the Black to the body pickup, or vice versa. To finish cut two notches in the large circuit board to enable the wires freedom of movement.

Re assemble and test.