As a parting gesture to the old unit, which has provided endless entertainment over the years, I decided to finally investigate what is happening in there electrically. Here is the result, hopefully in a form that any idiot could understand. Even me.
![Image](http://pic50.picturetrail.com/VOL405/8230927/23485833/393894975.jpg)
I don’t know which models have used the same printed circuit and pin arrangement. I’ve added the funny colours to the printed circuit so they match the wires that connect to it. I have tried to indicate where the wires head off to when they leave the hose coming from the pod plug. I hope this is helpful to somebody out there. I certainly could have used something like this when I was troubleshooting.
If you would like this diagram in PDF form just shoot me an email and I’ll send it. The PDF can be printed in A4 or A3 size.