MRC 0001803 User manual

CV Register Description Range Default
CV1 R1 Short address 1-127 3
CV2 R2 Start voltage 0-32 0
CV3 R3 Acceleration 0-32 0
CV4 R4 Deceleration 0-32 0
CV5 --- Top voltage 0-32 32
CV6
Speed curve select (0=linear, 1=slow
increase at slow speed, 2=fast increase at
slow speed
0-2 0
--- R6 Page number --- ---
CV29 R5 Basic configuration --- 2
CV7 R7 Manufacturer version number --- 32
CV8 R8 Manufacturer ID --- 143
CV17 --- Long address upper byte 192-231 192
CV18 --- Long address lower byte 0-255 3
CV19 --- Advanced consist address 0-127 0
CV49 Sound on/off 0-1 1
CV50 --- Horn type (34 types) 0-33 4
CV51 --- Horn volume 0-3 3
CV52 --- Bell type (8 types) 0-7 3
CV53 --- Bell volume 0-3 3
CV54 --- Bell ring rate 0-50 3
CV55 --- Diesel rumble volume 0-3 3
CV56 --- Brake squeal volume 0-3 3
CV57 --- Dynamic brake volume 0-3 3
CV58 --- Air release volume 0-3 3
CV59 --- Air pump volume 0-3 3
CV60 --- Safety pop valve volume 0-3 3
CV61 --- Engine cooling fan volume 0-3 3
CV62 --- Coupling volume 0-3 3
CV64 --- Rail wheel clack 0-3 3
CV65 kick start voltage 0-63 63
CV67-94 28 speed steps table while CV29.4=1 1-255 linear
CV105 --- User identification number 0-255 0
CV106 --- User identification number 0-255 0
CV113 --- Coupling fire volume 0-3 3
CV114 --- brake release volume 0-3 3
CV115 --- Auto brake squeal enable/disable 0-1 1(enable)
CV116 --- Auto bell with horn enable 0-1 0(disable)
light mode, 0=normal headlight
1=off, dim, bright cycle
CV121 Mars light flashing on/off (F28) 0-1 1
Diesel notch mode, 0=auto-notch
3=manual notch
CV123 prime mover type 0-3 2
CV125 --- Program it to1 will restore some the CV to
factory default settng --- 0
CV21 ---
When CV21=0, all accessory functions will
follow its own address. When CV21=1, all
functions will follow the consist address
CV117
CV122 --- 0-3 0
0-2 0
--- 0
Printed in USA
HO DC/DCC Synchronized Diesel Sound
Decoder with 28 Accessory Functions for
Proto 2000 PA/PB Locomotive
Item #0001803
Thank you for purchasing our most advanced DC/DCC ALCo
sound decoder. Combined with any DCC System or MRC
Blackbox, our true live capture digital ALCo sound decoder will
bring your Proto 2000 PA/PB to life.
•Synchronized diesel prime mover with random
associated locomotive sounds
•1.5 amp capacity
•Programmable for either 2-digit (1-127) or 4-digit (1-
9999) addresses
•Programmable start voltage and top voltage
•Programmable acceleration and deceleration
rate
•Programmable 14, 28/ 128 speed steps
•Directional lighting, (FO).
•Programmable user selectable horns and bells
•Supports full read back
•28 accessory functions (F1-F28)
•Supports advanced consisting (CV19)
•Supports programming on the main (OPS mode)
•Compatible with NMRA DCC standards
•Complies with part 15 of FCC regulations
•Programmable individual sound volumes
•28mm speaker included
PROGRAMMING
This decoder supports all program mode and read back feature. With MRC
Prodigy Advance DCC you can read its address and CV value.
SPEED TABLE CV67-CV94 FOR 28 SPEED STEPS
When CV29’s bit 4 is set to “1” it will use the speed table formed by CV67-CV94 to
control speed (motor voltage). It allows you to setup each speed for all 28 speed
steps. First, program CV29 to 18 for short addresses (1-127) or program CV29 to
50 for long addresses (128-9999) to enable speed table control. Then select
throttle to 28 speed steps and run your loco at speed step 1. Use program CV on
the main to change CV67’s value (1-255) to adjust step 1’s speed. The kick
voltage, CV65 is only applied when the speed step changes from 0 to 1. You
should switch between 0 to 1 many times to check step 1’s speed. When done
with CV67, select speed step 2 and program CV68. CV68’s value must be greater
then CV67’s. When done with CV67-CV94, use read back CV to make sure their
values are in increasing order.
Note: When using MRC Prodigy DCC to program addresses it will automatically
disable the speed table (set CV29’s bit 4 to “0”). Programming CV125 to 1 will also
disable the speed table and re-program CV67-CV94 to a default linear speed
setting.
TROUBLE SHOOTING
This decoder should perform well with all DCC systems. The maximum DCC output
should be less than 18 V. If the locomotive does not respond to commands, it may
have lost its address. Please re-program the address and program CV19 to 0
(disable consist). If it responds to slowly, you should clear its momentum by
reprogramming CV3 and CV4 to zero. If step 1’s speed is too high, you should
program start voltage, CV2 to zero. If its top speed is too slow, program top
voltage CV5 to 31. You should also clean the track to improve electrical pickup.
Read your DCC system manual to learn how to program and operate the decoder.
For more information about registers/CVs and their functions, please refer to the
NMRA DCC Standard & Recommended Practices, RP-9.2.2. This is available
directly from the NMRA or their website at www.nmra.org. Whenever the
decoder doesn’t work please use the program track to program CV# 125 with
value 1 to restore the decoder to factory settings. This should bring the decoder to
life with address #3.
FCC COMPLIANCE
This device complies with part 15 of the FCC Rules. Operation is subject to the
following two conditions. (1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference that
may cause undesired operation.
RETURN PROCEDURE
This decoder carries a 6 month warranty against factory defects. This warranty
does not include abuse, misuse, neglect, improper installation, or any modifications
made to this decoder, including but not limited to the removal of the NMRA plug if
applicable. If it should become necessary to return the decoder for warranty repair/
replacement, please include a copy of the original sales receipt. Please include
a letter (printed clearly) with your name, address, daytime phone number, and a
detailed description of the problem you are experiencing. Please also include a check
or a money order for $8.00 to cover return shipping and handling. If the decoder is no
longer considered under warranty, then please include a check or a money order for
$29.00 to cover the cost of repair or replacement and return shipping and handling.
Be certain to return the decoder only.
Any questions regarding Warranty Policy can be directed to our Customer
Service Department by calling 732-225-6360 between the hours of 8:30am
and 6:00pm EST, or by emailing: [e-mail]
Send the decoder to: Model Rectifier Corporation
Attn: Parts & Service
80 Newfield Avenue
Edison, NJ 08837-3817 U.S.A

Function Idle/Moving
F0 Headlight on/off or cycle of dim, bright, off
F1 Bell on/off
F2 Horn
F3 Mars light on/off with air releas e
F4 Coupling 1
F5 Brake release (idle) / brake squeal (moving)
F6 Dynamic brake on/off
F7 Air hose firing/uncoupling lever
F8 Click 3 times during idle will shut down / notch down while CV122=3
F9 Engine cooling fan / notch up while CV122=3
F10 Rail wheel clack (onlymoving)
F11 Traction air compressor
F12 Change prime diesel mover type, (4 types) including off
F13 Short air release
F14 Coupling 2
F15 Air pump
F16 Associated loco sound
F17 Flange noise 1
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 diesel rumble volume
F24 Air release
F25 Flange noise 2
F26 Flange noise 3
F27 Sand drop
F28 Mars light flash enable/disable with Air release (CV 121)
Note- Bell, Dynamic Brake, and Rail-Wheel Clack, cannot play at the
same time.
ADDITIONAL INFORMATION
The MRC 1803 HO gauge synchronized diesel sound decoder should perform
well when used with other brand command systems. See your DCC
command stations manual to learn how to program and operate the decoder.
For more information about register/CVs and their functions, please refer to
the NMRA DCC Standard & Recommended practices, RP-9.2.2 this is available
directly from the NMRA or their website at www.nmra.org.
INSTALLATION
Refer to the instructions that came with your PA/PB locomotive for removal
of the body shell. Remove the three screws that hold down the original
circuit board. Don’t lose these screws, you will need two of them to install
the decoder. Gently lift the original circuit board and note the locomotives
wire colors and locations from where they originate inside the chassis.
remove the plastic clips that hold these wires to the original circuit board,
and remove the wires from the circuit board. You will use the clips to
attach the wires to the decoder.
There are three red wires, (four red wires if the loco has a mars light), and
four black wires, do not mix these up! Two red wires are from the right
side wheel pickups, one red wire goes to the motor brush, and one red
wire goes to the mars light if equipped. Two black wires are from the left
side wheel pick ups, and one black wire goes to the motor brush. The
other black wire goes to the headlight. The other wires are as follows-
yellow to headlight. white and blue to the mars light, (if equipped), with the
blue wire as the mars light common. The decoder is set up to use the
bulbs that came with the locomotive, no change is needed. Install the
wires to the decoder as
noted in the following
diagram. make sure to
twist the wire leads tightly
as not to have a stray strand
cause a short circuit on the
decoder. Use the plastic
clips to attach the wires to
the decoder. You can also
solder the wires to the
decoder if you prefer instead
of using the clips.
There are three circuit board stand offs on the rear of the chassis that the
original circuit board sat on. The three screws removed earlier held the
circuit board to these stand offs. Only the two front stand offs are needed.
The stand off on the rear corner can be clipped flush with the chassis
with a pair of diagonal cutting pliers. Please wear safety glasses when
clipping the stand off. Install the decoder with wires attached onto the
front two stand offs and secure the decoder with two of the screws
removed earlier.
Note- if you do not wish to clip the stand off, place a small piece of
insulating tape over the stand off where it contacts the underside of the
decoder.
Re-install body shell making sure none of the wires that go to the
decoder are pinched or pulled out.
Make a Test Track
Before you start with your decoder installation, we strongly recommend
building a test track that uses a 20-ohm resistor to limit current. Only test
your installed decoder on the test track. The test track will prevent any
damage due to an incorrectly installed decoder.
TEST
All MRC decoders have been factory programmed with address #3, 28/
128 speed steps and maximum top voltage. After you have finished your
decoder installation you are ready to test it. Never run the installed
decoder on your layout without first passing the test. You may damage
the decoder if it is not wired correctly or if you have not properly isolated
the motor and lights.
Put the loco on the test track. Select the “Run” mode of your DCC system
and select or acquire address #3. Advance the throttle and the loco
should move forward. Push the light button, [F0], and the front headlight
should come on. Change the direction of the loco, the loco should
change direction and the rear headlight, [if equipped], should come on.
The locomotive cannot get to full speed, due to the resistor. If the loco
moved forwards and backwards, and the light{s} came on, you did a
great job. Congratulations!
Do not run the loco for an extended period of time on the test track or the
resistor will overheat.
*NOTE- If 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. Also do not confuse
a test track with a program track. A program track does not use the
current limiting resistor. Sound decoders need full power to the program
track to install all programming instructions.
DCC OPERATION
This decoder has diesel start up and shut down features. 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. If the loco is previously shut down you have to start up the engine.
You can use F19 to select 34 different horns and use F18 to select 1 of 8
bells. If you don’t have MRC Prodigy Advance DCC you will have to use
CV programming to select these features.
The decoder is defaulted to automatic notch. You can program CV122 to
3 to set manual notch for more realistic operation. Then use F9 to notch
up and use F8 to notch down. Using this feature gives you the true to life
feeling of operating a real locomotive.
There are many more programming features available with this decoder.
Please refer to the CV Chart to explore other features of the decoder.
DC OPERATION
This decoder provides synchronized, true ALCo diesel rumble
sounds with DC operation. Bells, horns, etc., cannot be accessed.
Use of the MRC BlackBox will enable the full range of sounds on a
DC system.
right pick up
mars light (red, blue and white)
motor
head light (black and yellow)
motor
left pick up
Figure1.0001803 decoder wiring diagram
DCC base unit
Power supply
Test track
27 ohm resistor
Figure 3. Diagram of test track
stand off- cut or tape
Figure2. 0001803 chassis diagram