The Auscision 422: Modification of markers lights

The release of the Auscision 422 back in February included the new 21 pin MTC socket for the quick installation of a DCC decoder. It was delivered with working headlights and red and white marker lights however they all worked together as one function in DCC operation. You had the option to turn them on/off with switches provided under the fuel tank in DC.

With Auscision decision to include a new 21 pin MTC socket for easily fitting a DCC decoder it lacked the full advantage of the new socket’s offering of 6 function outputs. The headlights and markers are wired together and operate as one function using only the Headlight and Rearlight outputs 1 and 2. Output 3(AUX 1) and Output 4(AUX2) were supplied as 2 solder pads on the circuit board labelled AX1 and AX2. Output 5(AUX3) and output 6(AUX4) are not wired for use. If they were added to the board as additional solder pads it would have made separating the markers lights a little easier.

I plan to show you 3 options available for separating the marker lights.

1.  Simply separating the marker lights from the headlights that will allow you to turn the front and rear marker lights on/off separately from the headlights using your DCC system and 2 function keys.                                                            

Application: DCC Sound/Non-Sound.             Level: Easy            Time: Approx. 20-30 Mins

Requirements: Soldering skills of relocating some wires around the existing circuit board.

 

2.  Separating the marker lights from the headlights that will allow you to turn all the marker lights on/off individually from the headlights using your DCC system and 4 function  keys.                                                                
Application: DCC Non-Sound            Level: Intermediate            Time: Approx. 30-45 Mins
Requirements:  Soldering skills of relocating  some wires around the existing circuit board and adding extra wires.
 
3. Separating the marker lights from the headlights that will allow you to turn all the marker lights on/off individually from the headlights using your DCC system and 4 function keys.                                                              
Application:  DCC Sound                  Level: Intermediate                   Time: Approx. 45-60 Mins
Requirements: Soldering skills of relocating some wires around the existing circuit board and installing a 2 function power amplifier.

IMPORTANT: The following modifications require either just soldering on the circuit board or soldering SMD components.  Any modifications will void your warranty and all responsibility lies with the person making these modifications.

1.  Firstly, start by removing the body from the chassis. This is simply done by spreading the body sides slightly to release the 4 retaining tabs. The body will then simply lift off and then set it aside.
2.  Next remove the 21 pin DC plug or your already installed decoder.
3.  Locate the 2 solder pads marked AUX1 and AUX2. They will become visible when the 21 pin DC plug was removed, near the point of the white arrow.

Remove the 21 pin DC plug and locate AX1 and AX2 solder pads near the point of the white arrow.

Option 1: DCC SOUND AND NON SOUND MODIFICATION

Requirements:

ESU Loksound Select or V4 21 pin Decoder for sound

ESU Lokpilot V4 21 pin or TCS EU621 decoder for non-sound

36 Gauge Wire (Brown, Black)
 
Procedure:
1.   Front Markers (No.1 End) remove brown wire from RWK. Red Marker
2.   Rear Markers (No.2 End) remove black wire from FRK. White Marker
3.   Add a length of wire to black No.2 End wire. Insulate joint and then join
      the above wires together and solder to AX2
4.   Front Markers (No.1 End) remove black wire from RRK. White Marker
5.   Rear Markers (No.2 End) remove brown wire from FWK. Red Marker
6.   Add a length of wire to brown No.2 End wire. Insulate joint and then join
      the above wires together and solder to AX1
7.   The wires attached to RWA and FWA are the marker light common (+)
8.   Install your decoder
9.   Program AX1 to F5 and AX2 to F6 function keys or any function
       number of your choice.
10. The markers now can be switched on/off separate from the head lights.

Showing the required wire connections to separate the marker lights from the headlights.

 

 

Option 2: DCC NON SOUND MODIFICATION

 

Requirements:

I recommend the TCS EU621 decoder for non-sound because it has 6 physical function outputs. LokSound decoders with 21MTC interface have 4 physical outputs and two additional logic outputs, namely AUX3 and AUX4. Since they are pure logic outputs it is not possible to connect any external loads directly. External power amplifiers are required and this increases the level of difficultly of the installation. (See Option 3)

36 Gauge Wire (I used Green, Violet)

 

Procedure:

1.    Front Markers (No.1 End) remove black wire from RRK and solder to

       AX1 pad. White Marker

2.    Front Markers (No.1 End) remove brown wire from RWK and solder to

       AX2 pad. Red Marker

3.   Rear Markers (No.2 End) remove black wire from FRK. White Marker

4.   Add a length of green wire to the black No.2 End wire. Insulate joint

       and then solder it to the base of pin 13.

5.    Rear Markers (No.2 End) remove brown wire from FWK. Red Marker

6.   Add a length of violet wire to the brown No.2 End wire. Insulate joint

       and then solder it to the base of pin 4.

7.   The wires attached to RWA and FWA are the marker light common (+)

8.   Install your TCS EU621 decoder.

9.   Program AUX1 to F4, AUX2 to F5, AUX3 to F6 and AUX4 to F7 function

      or any function number of your choice.

10. The markers now can be switched on/off individually.

 

   The required wiring to individually separate the 4 marker lights.

Note: Ignore the black wire solder to pin 20. This is used in Option 3.

This is not required in Option 2 unless you are using an ESU Loksound Decoder.

 

Option 3: DCC SOUND MODIFICATION

 

The ESU Loksound Range of 21 Pin decoders, such as the Loksound Select, LokSound V4.0 or LokPilot V4.0, only have 4 function outputs that are amplified to be able to drive loads directly such as LED lighting. These decoders also have two additional logical outputs which are not amplified but can be amplified via the use of the DCC Solutions Power Amplifier.

Requirements:

ESU Loksound Select or V4 21 Pin Decoder for sound

DCC SOLUTIONS: 2 Function Output Power Amplifier (PA73)
Contact DCC Solutions at info@dccsolutions.com.au or www.dccsolutions.com.au for more information
 Heat Sink Tubing

Procedure:
 

1.     Front White Markers (No.1 End) remove black wire from RRK and solder to     

        AX1 pad.

2.    Front Red Markers (No.1 End) remove brown wire from RWK and solder to

        AX2 pad.

3.     Rear White Markers (No.2 End) remove the BLACK wire from the pad marked FRK.         Place the heat sink tubing over the wire and solder to the SHORT BLACK wire on the        Power Amplifier. Insulate the joint with the heat sink tubing.

4.     Rear Red Markers (No.2 End) remove BROWN wire from the pad marked FWK.           Place the heat sink tubing over the wire and solder to the SHORT BROWN wire on              the Power Amplifier. Insulate the joint with the heat sink tubing.

5.     Solder the VIOLET wire from the Power Amplifier to the base of pin 4 on the 21 Pin          Socket.  (Figure 3)

6.     Solder the GREEN wire from the Power Amplifier to the base of pin 13 on the 21         Pin Socket. (Figure 3)

7.      Solder the BLACK wire from the Power Amplifier to the base of pin 20 on the 21            Pin Socket. (Figure 3)

8.      Install your ESU Loksound decoder.
 9.     Program AUX1 to F4, AUX2 to F5, AUX3 to F6 and AUX4 to F7 function

         or any function number of your choice.
10.   The markers now can be switched on/off individually.

                                                        Figure 1: 21 Pin Socket and AX1, AX2 Locations

                                                                                                    Figure 2: Power Amplifier Wiring Diagram

                                                                                           Figure 3: The Completed Power Amplifier Installation

 

 

AUSCISION 422 WIRING GUIDE

 

This table shows the configuration of Pad/Pin numbers used on the supplied OEM Circuit Board of your Auscision 422 Class Locomotive. It also shows the modified wiring used to separate the marker lights that will allow you to use your DCC system to control the marker lights individually. An additional simple modification is required to be able to use AUX 3 and AUX 4 on the ESU LokSound 21 MTC Decoders.(*)

 

 

 

The 21 Pin MTC Interface - Pin configurations and descriptions


For those who would like to convert their 422 class and feel that this conversion maybe complicated or you simply prefer someone to complete your installations, contact DCC Solutions at info@dccsolutions.com.au or visit www.dccsolutions.com.au





 

Auscision 422 Class Light Mod by TESS Ver.1.3 (06/2013)