MRC 0001906 Quick Start Manual Download Page 2

INSTALLATION

This decoder board completely replaces the PC Board in the Atlas
Trainman GenSet Locomotive. Following the Atlas directions, slowly
remove the body shell from the chassis of the locomotive. Be careful as
the supplied headlight wires are very short and may break off from the
LED’s when you remove the body shell. We recomend using a dab of hot
glue to secure the headlight wires close to the headlight location inside the
long hood of the body shell, to avoid them breaking off. Use a 1” to 2” thin
wire to connect two black wires from the headlights. Tape the joint to avoid
short circuit. This thin wire will be connected to the tab marked  “headlight
com”.  Remove the original board with two  Atlas ditch light boards.

Remove the weight from the rear part of the chassis. Remove two capacitors
hidden under the weight. They will not be used. The speaker supplied with
your decoder fits snugly in place where you removed the two capacitors.  We
recomend using a small bead of glue to fully secure the speaker to it’s
location. Before installing the ditch light boards please use tape to completely
wrap both front and rear ditch light board holders/slots to prevent the LEDs
from touching the chassis, and shorting out.

The ditch light boards are already soldered to the decoder for your
conveniance. Be very careful with these wires as they are very fragile.
.
Using the supplied wiring diagram, attach the four pickup, two motor and
three headlight wires to the decoder board and secure using the plastic
clips or by soldering the wires to the tabs on the decoder.  Use all the
wire channels in the chassis to route the wires going to the decoder and
use scotch tape in these locations to keep the wires from moving. If you
wish to add a roof top strobe light to your loco, use the tab marked for
strobe light and the headlight common tab on the decoder.

MAKING A TEST TRACK

We strongly recommend building a test track with a 27 ohm resistor to
limit current. Only test your installed decoder on the test track. The test
track will reduce the chance of damaging your decoder due to an
incorrectly installed decoder.

TESTING

The decoder has been programmed to address #3, 28/128 speed steps. To test,
place the loco on the test track. Select address #3 and 28 speed step. Move up
the throttle and the loco should move. Push the light button [F0] and headlight
should come on. Change the direction of the loco and the loco should change
direction.  The loco cannot reach full speed, due to the resistor. If all the above
occurs, you passed the test. Congratulations! Do not run the loco for an
extended period of time on the test track or the resistor will overheat.

 I

f your

installed decoder does not pass the test, find the problem, correct it and test it
again. As long as you test the decoder on the test track there is little chance of
damaging the decoder. This is why the test track is so important.

OPERATION

The decoder has start up and shut down features. If the loco was previously
shut down you have to start up the engine. Press any function key to start up
the engine before operating the loco. To shut down the engine you must bring
the loco to idle and then press F8  three times. This decoder is default to manual
notch setting (CV122=3). F9 will notch up and F8 will notch down. It has three
independent diesel genset prime mover sounds. The second engine will turn on
at notch 4 and the third will turn on at notch 6. This decoder also mimics the real
GenSet, and if left idling for a long period of time will shut down and re start
automatically at specific intervals to conserve fuel.
Shutting off the sound in CV49 will not disable the horn. The decoder has two
types of diesel prime movers. You can use F12  or  CV 123 to select the desired
prime mover sound.  You can use F19 to select 34 different horn sounds and
use F18 to select 8 different bell sounds. With MRC Prodigy Advance

2

 DCC

which has 28 functions, you can easily setup and access all the decoder’s
functions. If not,  you may not be able to access all the features of the decoder.
And you have to use the CV program to setup the decoder.
If you want automatic notching enabled set CV 122 = 0
The decoder can also be operated by a regular DC power pack. This will give
you engine sounds only. The DC operation is not recommened. If you wish to
enjoy the full array of sound functions using your DC power pack, the unique
MRC Blackbox (item #0001050), or the tech 6 2.0, (#0001200),  will allow you to
control all of the sounds in your sound equipped locomotives.

Right
pickup

Right
pickup

Motor
red

Headlight
common

Left pickup

Left pickup

Motor
(black)

Front
light

Rear
light

Strobe light Speaker plug

Function

Idle/Moving

F0

Lights on/off

F1

Bell on/off

F2

Horn

F3

Ditch Lights on/off

F4

Coupling 1

F5

Brake release (idle) / brake squeal (moving)

F6

Strobe Light on/off

F7

Air hose firing/uncoupling lever

F8

 3  times w ill shut dow n w hen in idle / Manual notch dow n

F9

Engine cooling fan / Manual notch up

F10

Rail wheel clack (only moving)

F11

Traction air compressor 

F12

Change prime  mover type, (2 types and off) 

F13

Short air release

F14

Coupler crash

F15

Air compressor

F16

Flange squeal

F17

Air release

F18

Change bell type (use F1 to turn off bell after adjustment)

F19

Horn type select (total 34 different horns)

F20

Associated loco sound

F21

Change bell volume (use F1 to turn off bell after adjustment)

F22

Change horn  volume

F23

Change prime mover volume

F24

Safety valve pop

F25

 Air release

F26

Flange noise

F27

Sand drop

F28

Ditch Lights flash when F3 is activated

Use tape to completely wrap
both front and read ditch light
board holders to prevent LEDs
from touching the chassis

DCC base unit

Power supply

Test track

27 ohm resistor

Figure 3. Diagram of test track

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