MRC 0001902 User manual

CV Range Default
CV1 1-127 3
CV 2 0- 3 2 0
CV 3 0- 3 2 0
CV 4 0- 3 2 0
CV 5 0- 3 2 32
CV29 --- 2
CV7 --- 32
CV8 --- 143
CV17 192-231 192
CV18 0-255 3
CV19 0-127 0
CV 21 0- 1 0
CV49 1-16 16
CV50 0-22 13
CV51 0-15 12
CV 52 0- 6 3
CV53 0-15 12
CV54 0-50 3
CV55 0-15 12
CV56 0-15 7
CV57 0-15 12
CV58 0-15 12
CV59 0-15 12
CV60 0-15 12
CV61 0-15 12
CV62 0-15 12
CV63 0-1 1(enable)
CV64 0-15 12
CV65 0-63 63
CV67-94 1-255 linear
CV105 0-255 0
CV106 0-255 0
CV112 0-15 12
CV113 0-31 20
CV114 0-31 10
CV115 0-1 1(enable)
CV116 0-15 12
CV117 0-255 200
CV118 0-6 0
CV119 0-6 0
CV120 0-255 150
CV121 0-1 1
CV122 0-3 3
CV123 0-4 0
CV124 0-255 160
CV125 0-1 0
Manufacturer version number
Manufacturer ID
Dec eler ation
Top voltage
Basic configuration
De s cr i pt io n
Short address
Start voltage
Acceleration
Safety pop valve volume
Engine cooling fan volume
Coupling volume
CV21=0, all accessory function w ill f ollow its ow n address.
CV 21=1, all f unctions w ill f ollow the c onsist addres s
Dynamic brake volume
Air release volume
A ir pu mp v olu me
Bell volume
Bell ring rate
Diesel rumble volume
Brake squeal volume
Master volume control
Hor n t y pe
Horn volume
Bell type
Auto ditch lights flash w ith horn enable
Rail w heel clack volume
kick start voltage
28 speed steps table w hile CV29.4=1
Light brightness
ACC1 light mode
ACC2 light mode
User identification number
User identification number
Sand dropping volume
Auto brake squeal enable/disable
Back EMF Load control proportional gain Kp
Back EMF Load control integral gain Ki
Back EMF Load control intensity (0=off)
Set it to1 to restore some factory default CV settnings
Long address upper byte
Long address low er byte
Advanced consist address
out sync time
Mars light flashing on/off (F28)
Diesel notch mode, 0=auto-notch, 3=manual notch
prime mover type, 4 types, 4=sound off
Flange squeal volume
Printed in USA
HO 16 Bit Stereo Sound Decoder for
E8/9 or PA Locomotives (DC/DCC)
Item #0001902 for Proto 2000 Locos
Thank you for purchasing our most advanced triple core stereo
sound decoder available. Combined with any DCC System or the
MRC Tech 6, our true live capture digital diesel sound decoder will
bring your Proto 2000 locos to life.
•Adjustable back EMF load control with utlra slow speed
control
•16 bit sound control with 16 levels of sound volume
•Dual out of synch EMD 567B prime movers for realistic
operation
•1.5 amp capacity
•2 different prime mover sounds- EMD 567B/Alco 539T
•Programmable for either 2-digit (1-127) or 4-digit (1-
9999) addresses
•Programmable start voltage and top voltage
•Programmable acceleration and deceleration rates
•Programmable 14, 28/ 128 speed steps
•Programmable user selectable 22 types of horns
and 6 types of 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
•True stereo sound comes with two 28mm speakers
PROGRAMMING
This decoder supports all program modes and read back features. With MRC
Prodigy Advance² DCC you can read its address and CV values.
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.
BACK EMF LOAD CONTROL (PID CONTROLLER)
This decoder is equipped with adjustable back EMF closed loop speed control. Its
proportional gain (CV113), integral gain (CV114) and derivative gain (fixed) are pre-
tuned for most locomotives. We recommendend that you do not change these set-
tings. Too much gain may cause the motor to oscilate (become unstable). Too little
gain may cause slow reponse. Please get some basic knowledge of PID feedback
control before trying to adjust CV113/114.
TROUBLE SHOOTING
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 $10.00 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 $55.00 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
F1 Bell on/off
F2 Horn
F3 Mars light (ACC1& ACC2) on/off
F4 Coupling 1
F5 Brake release (idle) / brake squeal (moving)
F6 Dynamic brake on/off
F7 Air hose firing/uncoupling lever
F8 3 times will shut down when in idle / Manual notch down
F9 Engine cooling fan / Manual notch up
F10 Rail wheel clack (only moving)
F11 Traction air compressor
F12 Change prime diesel mover type, (CV123, 4 types)
F13 Master volume reduce by 1
F14 Master volume increase by 1
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 22 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 Safety valve pop
F25 Air release
F26 Flange noise
F27 Sand drop
F28 Ditch light flash enable/disable with Air release (CV 121)
OUT OF SYNC TIME CV120
When you select dual primer mover the two primer mover sounds are generated
by two different sound processors. These two engine sounds can be
programmed to be out of sync. The amount of out of sync time is controlled by
CV120’s value times 8 ms. For example, if CV120=150, then the out sync time
equal 1.2 seconds (150x0.008)
ADDITIONAL INFORMATION
The MRC 1902 sound decoder should perform well when used with other brand
DCC systems. See your DCC Systems 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 E8/E9 locomotive for removal of the
body shell. Remove the screws that hold down the original circuit board. Gently
lift the original circuit board and note the locomotives wire colors and locations
from where they originate inside the chassis. Before remove the wires from the
circuit board study all wires and identify the four wheel pickup wires (each side
has two wires connnected together) and two motor wires. Lights wiring may
have different versions dependent on road name. For example, the sample we
have has yellow and black wire for headlight, and red, blue(common wire) and
white for mars light. Remove the plastic clips that hold these wires to the original
circuit board, and carefully remove the wires from the circuit board. You can use
the clips to attach the wires to the decoder, although we do recommend you
solder the wires to the decoder.
The decoder is set up to use the bulbs that came with the locomotive. Install the
wires to the decoder as noted in the following diagram. Make sure to twist the
wire leads tightly as not to have any stray strands, as they could cause a short
circuit on the decoder. Use the plastic clips to attach the wires to the decoder.
The speaker side is the top of the decoder. The common wire is set to 5V for low
voltage bulbs or LED’s. If the light is not bright enough you can use any wheel
pickup tab as common tab. You may need series a 1k resistor if the light is bright.
This stereo decoder comes with two speakers for the E8/9 which has two diesel
engines. Speaker # 2 should be placed in the front. If you use the decoder for single
engine locomotives, or if there is no room for 2 speakers, you do not have to install
speaker # 2. Use of this decoder in older Proto 2000 Locomotives may necessitate
changing the light bulbs.
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.
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 has been previously
shut down you will have to start up the engine. You can use F19 to select one of 22
different horns and use F18 to select 1 of 8 bells. If your DCC System does not have
this many functions, you will have to use CV programming to select these features.
The decoder is defaulted to manual notching. You can program CV122 to 0 to set
automatic notch for automatic operation. You can 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. When you change diesel volume you may need to notch up or down to
make the change effective.
This decoder should perform well with a DC power pack. However, you can only
have the default prime mover sounds. If you want full control of all sounds on DC,
please use the MRC Tech6 to operate the decoder.
CV123 DIESEL TYPE CONTROL
Make a Test Track
Before you start with your decoder installation, we strongly recommend building a
test track that uses a 27-ohm, 1/2 watt 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.
CV118/119 value ACC#1/ACC#2 Light effect
0 Ditch light ( CV118=0, CV119=0)
1Gyralight
2Marslight
3 Prime strato light
4 Single strobe light
5 Double strobe light
6on/off
CV123 value Diesel type
0 Dual EMD 567B prime mover1
1 Single EMD 567B prime mover1
2 Dual AlCo 539T prime mover2
3 Single AlCo 539T prime mover2
4 All sounds off
LIGHT EFFECT PROGRAMMING CHART FOR CV#118/119
Use F3 to turn on/off ACC1 & ACC2. For ditch lights both CV118 and CV119 must
be 0. Use F28 to enable/disable flash. When you blow the horn the ditch lights
will flash. The ditch lights will remain flashing for several seconds after horn is
off.
DCC base unit
Power supply
Test track
27 ohm resistor
Figure 2. Diagram of test track
Right pickup
Left pickup
Motor
Motor
Front light Rear light Com(5V) Speaker1(engine1, horn bell....)
Acc1 Acc1
Com(5V) Speaker2(engine2, horn....)