The installation is for HO-Scale Fleischmann 4430 BR614. It uses T1 decoder and was performed by Ric Bogart of Osborne Park  W A,  Australia 


Important Soldering Tip:
Please do not use any flux either liquid or paste on the mother board. It will damage it. Use only Rosin core solder approved for electronics use.
We recommend to use only Kester "44" rosin core, SN63PB37, .015" diameter, part number 24-6337-0007.
This can be ordered from Techni-Tool under Techni-Tool part number 488SO157

http://www.techni-tool.com

This is a Fleischmann DMU Model from the late 70’s and can be easily converted to DCC (see exploded view below)

 

 

 

The Roof is held on with plastic spring clips, care must be taken when removing and installing the roof piece to not break these.

 

Power collection from the track is from both Bogies and all wiring goes to the circuit board in the top of the DMU unit.

 

Once the Motor has been removed from the unit (as per Fleischmann’s Instructions)

Wires can be unsoldered and the motor is then disassembled. Remove the Brush Holder Clips and the Motor Brushes. Then unscrew the motor side cover and remove.

The power collection piece can be left in place. Remove the two cokes also as these will be in the way when cutting the circuit board.

 

These Models have a Motor Side panel which is best described as a Circuit board, Insulated on the back.

 

When cutting the metal of the Motor Side plate I used a Hobby drill like a Dremmel

With a tiny cutting or grinding disk. Take care not to cut to deep!

 

This will isolate the motor body from the –ve side of the motor.

 

(See Next Picture )

 

 

Note : The two  cuts

 

Test with a multi-meter to make sure you have isolated the three sections .

 

Now it is time to resolder the wiring on the motor .

Grey wire from the decoder to the –ve motor connection (see Previous Picture).

Orange wire to the +ve Connection.

Resolder the blue wire from the top circuit board.

Add the black wire and solder in place.

 

Reassemble the motor bogie and put back in place

 

The top cicuit board must also be modified (see below) then reassembled.

 

 

 

Now the rest of the wiring can be cut to length and soldered into place

 

 

Black wire from the decoder to the Left side rail power supply

Red Wire to the Right   side rail Power supply

White to the forward headlight

Yellow to the Tail light connections

 

The blue wire was not used to provide power for the headlights ,the existing connection through the body of the loco was utilised to give half wave power

 

Clip the roof back on and the 614 is ready to go


Other solder tips: When stripping wire, only strip a tiny little bit of the insulation. Strip no more then a 1/64 of an inch. When the wire gets tinned with solder the insulation will shrink back more. Try to not expose any more wire then half the length of the solder pad at most. In no case should solder or exposed wire wire ever be outside the boundary of the the solder pad you are attaching a wire to.
Click here for important information on properly Stripping and Tinning wire


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