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R8249 Eurostar Decoder Installation

The following guide is to assist you with the fitting of an R8249 Hornby decoder into the Eurostar motorised unit.

R8249 Eurostar Decoder Installation 1

Step 1. Locate and remove the two fixing screws on the underside of the locomotive.

R8249 Eurostar Decoder Installation 2

Step 2. Carefully remove the body by gently pulling the body sides apart and then pulling the chassis down.

R8249 Eurostar Decoder Installation 3

Step 3. Locate the orange capacitor at the rear of the chassis which is attached to the motor.

R8249 Eurostar Decoder Installation 4

Step 4. Unsolder both the two red wires and the two black wires from the orange capacitor.

R8249 Eurostar Decoder Installation 5

Step 5. Place together and solder the two red wires as shown below.

R8249 Eurostar Decoder Installation 6

Step 6. Place and solder together the two black wires as shown below.

R8249 Eurostar Decoder Installation 7

Step 7. Remove the decoder from the protective packaging, taking care not to handle the PCB directly as this will cause irreparable damage due to static electricity. It is important to protect the decoder by wrapping the PCB with insulating tape. To prepare the decoder, remove the plug and separate the red, black, orange and grey wires. The rest can but cut as short as possible and insulated with a piece of insulating tape. Strip the red and black wires and lightly "tin" them with solder. Tinning the wires will make the installation easier. Care must be taken when soldering not to breathe in the fumes.

R8249 Eurostar Decoder Installation 8

R8249 Eurostar Decoder Installation 9

Step 8. Strip and tin the orange and grey wires..

R8249 Eurostar Decoder Installation 10

Step 9. Solder the red wire from the decoder to where the two red wires join.

R8249 Eurostar Decoder Installation 11

Step 10. Solder the black wire from the decoder to where the two black wires join.

R8249 Eurostar Decoder Installation 12

Step 11. Solder the orange wire from the decoder to one of the capacitor legs.

R8249 Eurostar Decoder Installation 13

Step 12. Solder the grey wire from the decoder to the other leg of the capacitor.

R8249 Eurostar Decoder Installation 14

Step 13. Place the locomotive onto the programming track and test to make sure that the installation has been successful. Remember that the decoder has a default number of “3” and it is recommended that you code the locomotive to the number you require and test again.

R8249 Eurostar Decoder Installation 15

Step 14. Once you are satisfied that the decoder is functioning correctly, insulate the bare joins on the red and black wires using insulating tape.

R8249 Eurostar Decoder Installation 16

Step 15. Secure the decoder to the lead weight using Blu Tack or other suitable fixative. Ensure that all wires kept clear of any moving parts, but are capable of flexing enough with the moving bogie.

R8249 Eurostar Decoder Installation 17

Step 16. Replace the loco body, ensuring that all wires are kept clear of any moving parts and cannot be trapped between the chassis and the body. Test once more to ensure that the installation has been totally successful.R8249 Eurostar Decoder Installation 18

 
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