DCC position

[marcm]

I have just purchased a 4-6-2 steam locomotive and tender - Flying Scotsman.

It is labelled as DCC fitted. Where is the chip fitted? According to the accompying diagrams, it should be inside the body of the engine. It also has a sound card fitted inside the tender.  There appears to be no chip inside the dody of the engine

marcm

[Chrissaf]

It is very rare for a sound circuit board to be a separate PCB. If the loco is labelled as 'DCC fitted' on the box and it is a Hornby product. Then the sound decoder should be either a Hornby TTS or Loksound. Both of these sound decoders combine the sound and motor control function on the SAME PCB, there is no separate DCC chip for these type of decoders. The one exception to that is for EMUs and DMUs where there might be a second decoder in the rear dummy motor car - but that will not be relevant to a steamer such as the Scotsman.

.

For a Hornby model, then the R product code will usually take the form:

.

Rxxxx either DC only or DCC Ready (no decoder fitted).

RxxxxX for a factory fitted NON sound decoder.

RxxxxXS for a factory fitted Loksound sound decoder.

RxxxxT (or RxxxxTTS) for a factory fitted TTS sound decoder.

.

The sound decoder in a Hornby factory fitted sound loco is usually co-located with the speaker. Thus if the speaker is in the tender, then that is where the sound decoder should be.

.

It would help if you were to state the R number printed on the box.

[marcm]

Thanks for help. The no on the box is R....TTS, which I now appreciate its meaning.

thanks again

marcm

[Chrissaf]

Then that would make it the R3824TTS A1 Flying Scotsman.

.

This is most likely the TTS Decoder and speaker fitting arrangement. With item 20, being the TTS Sound & DCC Decoder plus the Speaker.

/media/tinymce_upload/b1bd67095a0d16745e00a0d13b642ef3.jpg

.