Quoted from Schwaggs:
Hey Ingo, I signed up for access to your German pinball site and was able to download the schematic they have up there. Thanks for the link!
An additional question: Why do some snubber boards have 100 uf caps while others have 2.2 uf caps? In my F-14, 3 are 100uf and 3 are 2.2 uf while others have no caps...
Oops, now I remember, that a great expert in our german forum made a schematic.
But you must read his excellent explainations:
"... When WMS designed their boards, at this time, they used as a switching transistor for coils only the transistor-type TIP122.
For power-coils, that operate with +50V, this transistor is too weak. Therefore they set a relay between, which is switched on by the TIP122. Then the current for the power coil flows over the working contacts of the relay.
The 3 components in paralell to the working contacts of the relay (obviously D2, R1 and C1) are probably used to serve as a spark supressor, a more adventurous and not just cheap approach.
Later these 3 compontents were let off and replaced with a spark suppressor capacitor.
And still later, WMS introduced the AUX-Power-Driver-Board, that was equipped with powerful transistors of the type TIP36C for switching the power coils, so that the relay boards were no longer necessary for this purpose. ..."
When I now see the different pictures, I am a bit confused. In the fotos showing C-11232-1, there are no components for spark supression, what makes absoluty no sense to my opinion, mightbe, someone desoldered this components for what reason ever.
To my opinion, the boards C-11232 and C-11232-1 are identical.
Im am unsure, what the exact value of C1 in version C-11232-2 is, I suppose, it is a 0,1uF 100V ceramic disk capacitor, mightbe some can verify this.
I made 2 grafics, that are attached, so that we have the schematics finally documented for the eternity . I will update them, when we have the correct values.