MRC 0001955 User manual

N Gauge Synchronized
Diesel Sound Decoder with
Two Authentic Prime Mover Sounds
Item #0001955
Thank you for purchasing our most advanced 16 bit DCC
locomotive sound decoder. Combined with any DCC System,
our new decoder with authentic diesel sound truly will make
your model railroad come to life.
•Two selectable diesel prime mover types with
randomly associated locomotive sounds
•User selectable 22 different horns and 8 bells
•28 accessory functions allowing more sound control
than ever
•Programmable individual sound volumes (16 levels)
•0.75 amp capacity
•Programmable for either 2-digit (1-127) or 4-digit
(1-9999) addresses
•Programmable start voltage and top voltage
•Programmable acceleration and decelaration rates
•Programmable 14, 28, 128 speed steps
•Selectable factory default speed curve
•Supports full read back
•Supports advanced consisting (CV19)
•Supports programming on the main (OPS mode)
•Compatible with NMRA DCC standards
•Complies with Part 15 of FCC
•10mm speaker included
•drop in fits Atlas N scale GP7, GP9, GP30 and GP35
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 15 V. If the locomotive does not respond to com-
mands, it may have lost its address. Please re-program the address and program
CV19 to 0 (disable consist). If it responds 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 interfer-
ence 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 $9.00 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 $35.00 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
CV Register Description Range Default
CV1 R1 Short address 1-127 3
CV2 R2 Start voltage 0-32 10
CV3 R3 Acceleration 0-32 0
CV4 R4 Deceleration 0-32 0
CV5 --- Top voltage 0-32 32
CV 6 Speed curve select (0=linear, 1=slow increase,
2=fast increase at slow speed) 0-2 0
--- R6 Page number --- ---
CV29 R5 Basic configuration --- 2
CV7 R7 Manufacturer version number 27 1
CV8 R8 Manufacturer ID --- 143
CV17 --- Long address upper byte 192-231 192
CV18 --- Long address low er byte 0-255 3
CV19 --- Advanced consist address 0-127 0
CV49 odd number sound on, even sound off 1on
CV 50 - - - Horn type 0-22 6
CV 51 - - - Horn volume 0-15 12
CV 52 - - - Bell type 0-7 3
CV 53 - - - Bell volume 0-15 12
CV 54 - - - Bell ring rate 0-50 3
CV 55 - - - Diesel rumble volume 0-15 12
CV 56 - - - Brake squeal volume 0-15 7
CV 57 - - - Dynamic brake volume 0-15 12
CV 58 - - - Air release volume 0-15 12
CV 59 - - - Air pump volume 0-15 12
CV 60 - - - Safety pop valve volume 0-15 12
CV 61 - - - Engine cooling fan volume 0-15 12
CV 62 - - - Coupling volume 0-15 12
CV63 --- Sand release volume 0-15 12
CV64 --- Rail wheel clack 0-15 12
CV 65 Start Kick voltage 0-15 12
CV67-94 28 speed steps table w hile CV29.4=1 1-255 linear
CV112 Air compressor volume 0-15 12
CV113 --- Coupling fire volume 0-15 12
CV114 --- brake release volume 0-15 0
CV115 --- Auto brake squeal enable/disable 0-1 1(enable)
CV116 --- Flange volume 0-15 12
CV122 --- Notch mode, 0=auto, 3=manual 0-3 0
CV123 Prime mover type and off 0-1 1(on)
CV125 --- Programming to "1" w ill restore some CV's to
factory settings --- 0
0CV 21 - - -
When CV21=0, functions follow its ow n
address. CV21=1, functions follow the consist
address
---

INSTALLATION
It is quite a challenge to install this decoder into an “N” scale diesel locomotive.
You should have some basic electronics knowledge
The body shell, and fuel tank casting must be removed from the chassis, and the
entire frame must be disassembled. Mark the top of the motor with a dab of paint
or permanent marker; remove the original circuit board, motor, driveshafts,
bearings, and trucks.
The top portion of each frame half that touches the motor brush tabs
should be insulated with a small piece of clear tape.
The decoder replaces the original circuit board of the locomotive and should fit in
the same location. Assemble one half of the frame first, installing the decoder,
motor, driveshafts, bearings, trucks, and frame spacers. Gently place the other
frame half on top of the completed half, checking clearances and if there is any
binding of the drive mechanism. Correct any trouble spots at this point. Also
check to make sure the motor brush tabs are not touching the frame halves and
the clear tape is correctly positioned at the motor brush tab points to avoid
shorting out the decoder. Now you can install the insulated bolts and nuts to
secure both frame halves together. Apply tape on the chassis under the speaker
to prevent the speaker from touching the chassis.
Re-check installation!!! If at this point you are satisfied with the mechanical
installation of the decoder and all associated parts, it is time to check the
installation on a test track. Do not install body shell until testing is done. See
section on “Making a Test Track”, and “Testing”
*Note- This new decoder has the speaker mounted to the underside of
the circuit board. This makes installation easier with no frame milling
required.
Figure 1.
Figure 2. shows how to install 0001955 decoder
MAKING A TEST TRACK
Before you begin decoder installation, 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 may prevent damage from an incorrectly installed
decoder.
Note: The program track is NOT a test track. The program track does not use a
current limiting resistor. So it can’t protect 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. 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. 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.
There are four diesel prime mover sounds you may enjoy. You can use F12 to
select either prime mover sound or “off”. You can use F19 to select 22 different
horn sounds and use F18 to select 8 different bell sounds. With MRC Prodigy
Advance2DCC 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. If you DCC system allows CV programming, you would have to use
this type of programming to access all the features of the decoder.
The decoder default is set to automatic notch. You can program CV122 to 3 for
manual notching for realistic operation. And then use F9 to notch up and use F8
to notch down.
If you don’t have DCC system, you have to use the MRC Blackbox (item
#0001050) or Tech6 (item 0001200) for the DC operation. It will allow you to
control all of the sounds in your sound equipped locomotives. They are easy to
setup and use.
Bell, Dynamic Brake and Rail Wheel Clack cannot play at the same time. If you
activate the Bell sound [F1], while either the Dynamic Brake or Rail Wheel Clack
sounds are in use, the Bell sound will override the other 2 sounds. Rail Wheel
Clack cannot play while the loco is in idle. When you turn off Dynamic brake and
Rail Wheel Clack sound there will be one second delay.
Function Idle/Moving
F0 Headlight on/off or rule 17 or cycle of dim, bright, off
F1 Bell on/off
F2 Horn
F3 Short air release
F4 Coupler c ut lev er
F5 Brake release (idle) / brake squeal (moving)
F6 Dynamic brake
F7 Air hose firing/uncoupling lever
F8 3 time shutdown/manual notch down
F9 Engine cooling fan/manual notch up
F10 Rail wheel clack (only moving)
F11 Traction air compressor on/off
F12 Change prime mover type and off
F13 Short air release
F14 Coupler crash
F15 Air compressor
F16 Flange squeal
F17 Air release
F18 Change bell type, and off (use F1 to turn off bell after adjustment)
F19 Horn type select
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 release
F28 Air release
Wrap the whole notch with tape to prevent the motor’s contact from touching the
chassis. Otherwise, the decoder will be destroyed if the motor contact touches
any unwrapped part of the chassis.
wrap tape
DCC base unit
Power supply
Test track
27 ohm resistor
Figure 3. Diagram of test track