Quoted from madaracs: It isn't. But I've got a whole host of switch issues with this machine right now so I'll have to reserve the solution for this thread until I get those figured out.
Thanks everyone for the support and help.
When I wired in the new coin door harness I started getting other switch problems. Including when I engaged the left flipper--points were added to the board. (triggering that outlane switch again). So I started from scratch with the assumption that the problem was likely in the most recent change: The Coin Door.
Troubleshooting:
- I ran the self-test and switch 1 was stuck. I ran it a few times and it showed number 9 (Coin switch 3) was stuck intermittently.
- I disconnect coin switch 3.
- Ran self-test again. Switch 11 is stuck (coin switch 2).
Seeing as 9 and 11 were the two switches I added, I finally started to put two and two together. It turns out that I when I wired this coin door up nearly three years ago, I did it by sight--not by reading anything important like where the NC (Normally Closed) and/or NO (Normally Open) terminals were on each switch. I had assumed they were all made the same. So up until this point I didn't look at the actual specifications of the switches.
Turns out the original switch on the coin door was:
Coin Switch 1: COM - NC - NO
The other two switches are:
Coin Switch 2: COM - NO - NC
Coin Switch 3: COM - NO - NC
I had inadvertently wired the Common to the Normally Closed terminal on coin switch 2 and 3. I believe I was basically bridging the current which was affecting the rest of the switch matrix.
All I needed to do was move strobe wire for switch 9 (coin switch 3) and 11 (Coin switch 2) to the NO terminal and things started behaving properly.
Switch self-test checks out OK now.
No more wonky resets. Flipper and outlane operations normal.
Leaving these links here for additional help (I used them in my search for the solution):
Mr. and Mrs. Pac-Man Switch Matrix Troubleshooting Tips:
Pinball Rehab's infamous Switch Matrix Theory and Troubleshooting Guide: http://pinballrehab.com/1-articles/solid-state-repair/repair-guides/146-switch-matrix-theory-and-troubleshooting I actually didn't make it past the section entitled "Human Error."