Wire Identification
The schematic
OK, first off, you need to have some idea what the wires are for if you are looking for them on the schem. It's usually pretty obvious if they've been disconnected close to where they originally attached. This is one case where the wire bundling helps...people don't usually clip a wire in the wrapped part of a bundle and pull it out.
The inevitable exception is those wires that are usually hanging around the ball trough that are used for meters. Often some of them don't appear on the schematic at all (especially the one that was used to hook up a "coin out" meter, which counted the number of credits reset off the game at power on. The assumption being that the bartender paid these off, so the operator needed to reimburse that amount from the cashbox before splitting the rest).
Anyway, looking at the image below, the wires that connect to the replay register are all called "replay register zero switch", and have been marked in green.
surf club |
| schematic. Big Time is the same. |
|---|
One problem is isolation. We need to make sure the piece of wire we are trying to ID is disconnected from the rest of the game circuits.... especially coils. Coils are very low resistance devices. A continuity tester would usually consider them to be a wire - which they are, but they are really long wires wrapped around a spool, so they have a small but non-zero resistance.
The second problem is the two wires are the same wire issue. To minimize this,
we will try and identify the wires that can't be multiples first.
Anyway, let's move on to the problems and the solutions.
