Case in point #2:
I had completely finished my Doctor Who high end resto.
Everything is perfect and everything is brand new.
Last thing on the list is the little Lamp board that illuminated the Dalek on top.
Its simple. Its a simple 2 wire circuit.
The manual and the schematic shows exactly where the wires go and how they are hooked up.
On my game this ISN'T how they are at all.
The factory fix was to draw power off the display board instead of the driver board pin. I think to simplify the harness installation on the assembly line.
This is fine, except I upgraded to a colorDMD display and that connection to the old display no longer exists.
So, I have a thin black wire with an IDC connector on it and nowhere to plug it in.
I asked for and received picture from generous pinsiders, this was partially helpful.
The connector location from the maual already has a connector on it.
The pin on the driver board already has a wire going to it.
Im left with a little 4 pin IDC connector with a single wire on it dangling in my backbox.
The solution was to cut off the connector and simply double up the wire on the pin that it was supposed to go to.
So now there are 2 wires on that driver board pin instead of one from the manual schemtic.
It works perfectly.
It took me 4 days to sort out this silly little lamp connection.
So, in pinball, not everything is rock solid and perfect.
There are lots of errors and omissions in the documentation.
The Idea is to have a basic understanding and move on.
Solutions will present themselves.