Looking for PS2 5V Schematic

No and there never will be a schematic! but your light is too bright because your FET shorted and on the p2 5 volt board they are not easily replaced. if it had been a ps 2 3 volt board there much easier to replace! when fet shorts voltage is raised beyond lamp voltage hence burns your light out and glass turns black! you could just put a new 6 volt bulb in headlight and then run off track voltage using dropping resister and diode!

Alan

You could also run LEDS off the motor leads.  At least they would go off when the engine isn't moving.

@Alan Mancus posted:

No and there never will be a schematic!

Is this true?

I know I've seen some basic wiring diagrams before that at least showed which wires do what.  @gunrunnerjohn had a labeled one with pins.

I also tried to put together a complete PS2 3V schematic for a premier steam engine with a MUX board and aux board for PS2 3V as well, you can find a PDF in my thread about my S1 rebuild here. I warn you though that it's NOT an engineering drawing that is guaranteed correct, and I've solicited some advice from those who know more than me to chime in.  They haven't yet, so I wouldn't assume it's correct and take it for gospel and burn out your board.  I'm not even assuming it's correct yet, and I won't be connecting power to my board until I get a bit more feedback.

David, good point about powering leds off off the motor leads. If I wire the leds in series and reverse their polarity will they not only light one at a time?

me and David both told you the easiest way to replace lights and run from a different source ! if you run them off the motor leads the lights will only illuminate when the engine is running in forward or reverse in neutral the lights will be OFF! if your using led's they'll only light in one directions

Alan

Alan,

Yes, that is the down side. 

@Alan Mancus posted:

No and there never will be a schematic! but your light is too bright because your FET shorted and on the p2 5 volt board they are not easily replaced. if it had been a ps 2 3 volt board there much easier to replace! when fet shorts voltage is raised beyond lamp voltage hence burns your light out and glass turns black! you could just put a new 6 volt bulb in headlight and then run off track voltage using dropping resister and diode!

Alan

Actually, the headlight FET is as easy to replace on the 5V board as the 3V board.  Not a big deal to fix the headlight on this board.

well John i changed one on a headlight fet and never did get it to work! ps 2 5 volt

Alan

I've changed lots of them, and other than one that apparently cooked the processor output as well, they all worked.

John where can you get the bsh101 transistors can't find them anymore for light output to headlight q215 on board?

Alan

Note that Jon's diagram say BSH101 or FDN5630.  DigiKey has about 50K pieces in stock right now!  Also available thru eBay, Amazon, and all the usual suspects.

Yep, I use the FDN5630, forgot to mention that.  The BSH101 is a pretty generic N-chan MOSFET, there's a lot of parts that would drop in there and work fine.

John that's the one i used in five volt board but never got it to work light was still too bright! FDN5630 from digikey!

Alan

It's possible that there's a problem with the uP port that drives the light, or the traces have been damaged on the PCB and the light output is shorted to DC ground.