Loksound V4 Aux 3 & Aux 4 solder pads

[Soul Survivor]

I’m trying to locate the solder pads for Aux 3 & 4 on my LS4 decoder. The manual only shows the position of them (on page 23) for the Rev 41 type, not for the Rev 40 type (which I appear to have). Please see attached photo. I’ve ascertained which pads are for U+ & GND from the power pack diagram, however I cannot find out which of the pads I have numbered 1,2 & 4 are for Aux 3 & Aux 4 respectively.

I’m hopeful someone can provide the answer for me.

Thanks,

 

 

[Erixtar1992]

Aux 3&4 on a 21 pin V4 are logic level only.

i wire a lais aux output booster onto the 21 pin socket in the loco

[Soul Survivor]

Thanks to your excellent YouTube video showing how to modify and improve the lighting on a Bachmann Class 37 I’m aware Aux 3&4 are logic level only and that I need to attach a booster board. The difference being I don’t wish to wire to the 21 pin socket direct as it is particularly difficult on the Bachmann Class 20. In this case it will be easier to wire to the decoder once I find out which of the solder pads is Aux 3&4 respectively. Cheers for the reply though!