Installation of the loco-decoder 74 420
Connection of the unit
Remove the shorting plug from the loco socket
and insert the decoder plug into the loco socket.
Should the headlights be lit in the wrong direction,
the plug must be turned by 180°.
Important:
If both the driving direction as well as
the lights are wrong - meaning that they agree
with each other but they do not agree with what
is shown to be forward on the command station
- then one can simply change the value of Bit #0 of CV #29.
Installation of an extra function
The yellow and white wires can also be used to control other devices, e. g. a smoke generator.
Connect the white and the yellow wire to each other if you wish them to work direction-
independent.
Caution
Please take care to substitute any 12 V lamp with a 19 V one - or else lamps wont last long.
Fixing the unit in the model
Use the supplied adhesive pad for fixing the decoder in place within the loco. The pad keeps the
unit insulated and fixed at its position.
In case the loco has a high current consumption, we recommend to fasten the decoder directly
to the loco metallic frame using hot glue - all common brands are suitable for this. Please be
careful not to make any electrical contact between the loco frame and the decoder!
Safety first
Check for proper wiring after installation using a wiring checker or an ohmmmeter. Make sure
that the shell will not touch the unit and that no wires can be caught (pulled, cut) when loco
shell is placed back again on the loco frame.
A short circuit from motor brushes or ancillary outputs
to pickup shoes, frame, or wheels may destroy the device!
