Zerogee
Clencher's Bogleman
Hoping that somebody with actual hands-on experience of the conversion can help with this, please...?
I know there are a couple of old threads on the same question (at least one of them my own), but I'm now finally at the point where I'm going to attempt one of these and I've run into a specific problem with the wiring for the lights.
The model is an LGB Wismar railbus (the "pigsnout") from the late '80s or early '90s; the decoder to be fitted is one of MD mXion's SB boards, made as a specific drop-in replacement for the old PCB in the model.
My problem is understanding the connections and rewiring required for the front and rear lights - the two little PCBs that are located inside each end of the railbus body, each with a red and a white 5v bulb, to give the directional white headlights and red taillights depending on direction of travel.
The much larger PCB in the roof, which carries the interior lights and cab lights, is quite straightforward and details of the required modifications for that are clearly shown in the MD decoder manual; however the little end boards shown in the manual are only for a later (2000-ish) model, where each lighting board has a three-wire connection (white, brown, green) to the main PCB.
The earlier model differs from this in that the wiring to each light board is only two wires, red and black... can anyone who has actually done one of these (and maybe taken notes and/or photos?) tell me exactly how the red and black wires from the front and rear lighting boards should be connected to the new mXion SB decoder, and also if the modification to the light boards (a jumper wire between two PCB tracks) is the same as for the later three-wire type shown in the manual?
Sadly the video on MD's site about installing an SB board isn't any help either, because that shows an even newer version with all the lighting connected using LGB's really useful black/black/black/black cables...
Thanks in advance for any practical advice that can solve the problem!
Jon.
I know there are a couple of old threads on the same question (at least one of them my own), but I'm now finally at the point where I'm going to attempt one of these and I've run into a specific problem with the wiring for the lights.
The model is an LGB Wismar railbus (the "pigsnout") from the late '80s or early '90s; the decoder to be fitted is one of MD mXion's SB boards, made as a specific drop-in replacement for the old PCB in the model.
My problem is understanding the connections and rewiring required for the front and rear lights - the two little PCBs that are located inside each end of the railbus body, each with a red and a white 5v bulb, to give the directional white headlights and red taillights depending on direction of travel.
The much larger PCB in the roof, which carries the interior lights and cab lights, is quite straightforward and details of the required modifications for that are clearly shown in the MD decoder manual; however the little end boards shown in the manual are only for a later (2000-ish) model, where each lighting board has a three-wire connection (white, brown, green) to the main PCB.
The earlier model differs from this in that the wiring to each light board is only two wires, red and black... can anyone who has actually done one of these (and maybe taken notes and/or photos?) tell me exactly how the red and black wires from the front and rear lighting boards should be connected to the new mXion SB decoder, and also if the modification to the light boards (a jumper wire between two PCB tracks) is the same as for the later three-wire type shown in the manual?
Sadly the video on MD's site about installing an SB board isn't any help either, because that shows an even newer version with all the lighting connected using LGB's really useful black/black/black/black cables...
Thanks in advance for any practical advice that can solve the problem!
Jon.
