Blue Mallet - LGB Onboard decoder connections

Ralphmp

Ralphmp

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Doing some upgrades to my Blue Mallet to fit a pulsed smoke unit and automatic uncoupler. To make sufficient room for the smoke unit I will be removing the existing XL/LGB main board combo and the factory fitted sound board, and replacing with a Massoth XLS.

Whilst most of the innards are familiar, the loco has a couple of connections to the sound board that I'd appreciate some advice on.

Firstly, the loco has a 3-wire cable attached to a socket on the sound board marked "Reed" for the factory-fitted reed switch in the rear motor block. Cables are Red, White & Black - can anyone confirm what each wire is for?

Secondly, I have a further 3-wire cable attached to a socket on the sound board marked "Geber". All wires are black and appear to run into the innards of the rear motor block. I haven't come across such a connection before so would be grateful for advice on its function.

The attached pictures show the cables in question (photo 1, cables to the right) and the sockets on the sound board (photo 2, socket on the right feeds the firebox LEDs, socket in middle is for the reed switch, socket on the left is the "Geber" socket)

Thanks in advance for any info

Phil
 

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I think you'll find that the "reed" is for the two reeds that sound the whistle and bell when activated by a magnet between the rails. This facility will be redundant with DCC triggered sounds
The other must be the hall effect chuff sensor. You'll need to route this via the pulsed smoke unit, see the instructions that come with it.
The sketch below is from a Sumpter valley sound unit of similar age and shows the board sockets viewed from above.
It may be worth double checking as I haven't investigated a Blue Mallet board, but I doubt that the connections would be different.

Edit,
Muns confirmed this above whilst I was composing my reply. :)

sound conns.jpg
 
Thanks guys. My other mallet is the very basic model and the parts diagram doesn't include the additional "bells and whistles". Never sure what the correct LGB ref for the Blue Mallet is but the diag Muns linked me to looks fine, and Neils schematic is a real help.

Thanks again.
 
The reed contact need not be redundant on DCC, Look at page 16 of the Massoth XLS booklet.
 
Yes Greg. Had to look that one up.
CV190 and 191. Values between 0 and 12
 
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