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HO Absolute RDC Project - Support Page


Important DC Advisory

Do NOT use MRC 1300-series DC controllers with any of Rapido's locomotives. The RailPower 1300 is notorious for voltage spikes and it WILL destroy your locomotive. There is no “if” about it. We will try to help you if we have the parts, but we are not responsible for locomotive damage due to voltage spikes in your power supply. As well, we will not repair any locomotive damaged by an MRC 1300-series controller (or any other "train set" DC controller) unless you have retired the controller. Otherwise the damage will soon reoccur. “Train set” DC controllers should not be used with any modern model locomotives.

Gyralite operation for DCC/Sound models running on DC

We accidentally requested that the Gyralite LED - hidden behind the end doors - defaults to "ON" in DC. This only affects DCC/Sound models running on DC layouts. It does not affect silent DC models. If you will be running your sound-equipped RDC on a DC layout and do not want to install a Gyralite, please change CV 14 to "3". If you do not have access to a DCC system, any good hobby shop should be able to do this for you. This only takes a few seconds and will make the Gyralite default to "OFF."

Changing the horn sound

The instruction manual lists the incorrect values for modifying the horn through CV48. The correct values are as follows:

  • 0 Large Single Chime
  • 1 M3H
  • 2 Leslie S-2
  • 3 BCR 5 Chime
  • 4 K3L
  • 5 A-125
  • 6 Hancock
  • 7 K5LA

Can I Turn Off the Interior Lighting?

Unfortunately no. The design of the RDC goes beyond what current DCC technology allows us to do. Current decoders limit us to 8 functions, and we simply ran out on the RDC.
As a result, the interior lights are on whenever track power is on. The interior lighting is not routed through the decoder, so you cannot remap another function to control it.

Breaking in the RDC

In testing, we found that some of the RDC motors sound quite loud when first run. However, after running for even a few minutes, they settled down and performed as smoothly as we would expect them too. Please take the time to break your RDC in properly - we don't write about this in the manual for nothing!


General Problems and Inquiries

If your model arrives with damage or there is any other issue, the best thing to do is to contact our support team. They take care of all of our warranty repairs and they are all swell guys. The toll-free number is 1-855-LRC-6917 (1-855-572-6917) (outside North America, +1 905-474-3314 or 905-474-3324). You can also email us – click here.

DCC Decoder Installation

Our DC RDCs are DCC-ready and come equipped with a 21-MTC plug for easy DCC decoder installation.

Function Issues on Digitrax Systems

If you operate with a Digitrax DCC system and your DCC loco does not seem to be responding as it should, please try the fix described below before contacting us. It may save you some time and aggravation! Apparently, some Digitrax systems store the address of every single loco that they’ve ever used on them, and regardless of whether the loco was dispatched or not. Once this memory fills up, any new locos that attempt to be used by that system exhibit very unusual behavior including non-working functions and odd responses. The solution to this is easy. All you need to do is clear the memory in your system. This is done by clearing slot #36; see the instructions below. Once you’ve done this, you’ll likely find that your loco operates exactly as you expected it should. General Instructions for Closing Command Station Option Switches (for specific instructions for your command station and throttle, see the instruction manual for your equipment):

  • On the command station, set the MODE toggle switch to the OP (center) position.
  • Using your throttle go into Switch Mode
  • Enter the Option Switch number you wish to change (in this case 36).
  • Press the “c” key on the throttle.
  • You will hear a beep.
  • On the command station move the MODE toggle down to SLEEP then back up to RUN.
  • Using your throttle, turn Track Status back on.

For more information, see this page from Digitrax’s web site.

Absolute RDC Parts Diagram

 Absolute RDC Exploded parts diagram

Absolute RDC

  Instructions (English)   Instructions (Français)   ESU LokSound Decoder Manual

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