If the Spinner relay is activating when this happens, check this circuit, starting with this switch.

Pinball (resized).png

I can't see it on this schematic, but I assume these score 100 when not lit?

Usually this is a case of a make/break switch on some type of alternating relay, or a change relay of some kind, not making when it changes from 100 to 1000.

I thought about that, but because OP Pmedic871 reported that the problem happens for both spinners, it's more likely a problem in the Spinner relay switch I pointed to in post #2.

Look again at the schematic snippet above. Once I blew it up some I saw what I was looking for.

Right below the spinner relay switch are the paths for the left and right spinner switches. It appears to me, and I certainly could be off, that the spinner relay is not activated when the spinners are just scoring 100 that the spinner relay isn't in the circuit. It's only when the make/break switches shown on each circuit change state, and then the spinner relay is activated by the spinner switches, which in turn would go to the 1000 point relay.

So it could be the make break switches on each of those relays, No 2 and No 5, but it's more probable it's the single spinner relay switch you pointed out.

Doesn't hurt to check them all.