Hi guys, I've got a project Jokerz that I'm trying to bring back to 100%.

Wanted to get some feedback on some random resets that started cropping up now when I thought she was running pretty well.

Both in gameplay randomly, mainly after the game gets "warmed up" from a solid game or two, I'll get a reset mid game, no common action occurring, sometimes seemingly nothing happening, followed by resets in attract mode. Can't finish a game at that point once is starts resetting.

I've done the following:
- Replaced the bridge rectifiers on the aux board, main psu, and backbox.
- Replaced caps on main psu. This was a Great Plains kit, c1, c3, c7, c8, c9, c10, c12
- Replaced the diodes on both flippers

Checking voltages, on the psu board I get a rock solid 5.23v, a lightly fluctuating 11.3v-11.7v for +12, and a -14.5ish for negative. At the +5 tp on the mpu I'm getting 5.18v or so, and similar at pin 3 on the 6802 cpu dips. BUT, at pin 20 on the pias I'm getting 3.6v. I suspect that is likely a problem, might be dipping during play, etc (don't have clips small enough to clip on there and monitor during play though.) [EDIT - I was measuring the wrong pin like an idiot, the 3.6v was on pin 21 of the pias. I'm assuming this is not the problem.]

Is that reading actually a problem as I'm thinking? Then if so, I'm not sure what that is then indicating is the likely issue.

For a background, this board does have some alkaline damage. I've cleaned up and socketed u42 (u42 failure at boot), previous owner did u41. I've buzzed out all connections from the main pias. Game was running great after that, for several weeks worth some long play testing, so I feel like this is a new problem.

The reset circuit area on the board has some corrosion, that I am planning to strip and clean along with the traces that were under the battery area. I've ordered parts to do the reset generator replacement/retrofit from pinwiki there which looks like it will simplify the repair. But my understanding is that problems with the reset circuit would mainly impact bootup, despite the name and the fact that I'm having "reset"/reboot problems.

Am I wasting time looking elsewhere for this problem, until addressing that reset circuit area of the board? That'll be my next step, but I'm wondering if I need to address something else while I'm at it.

Oh, I also ordered the diodes to replace on the aux pwr board, for all of the the other solenoids, but with the resets occurring in attract as well, I'm thinking it's not them... I'll likely wait to try replacing those.

Alright, well that's a little embarrassing, I was checking at pin 21, to get the 3.6v... I am only measuring .6 ohm between the test point and actual pin 20, so that doesn't appear to be the issue.

I had some free time here so I've just started removing everything with corrosion damage from the reset area before seeing that, so I can't check voltage atm, I expect it's fine then... Will have the parts to rebuild the area by the weekend hopefully. Figured it was time to bite the bullet and fix the corrosion properly before it gets any worse... May find this wasn't related to the resets, but I guess it needs to be done.

Before pic attached of what I'm working with - not the greatest condition.

Trying to learn on this one and avoid buying a rottendog replacement. We'll see.

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Preliminary results are positive. I removed all components from the reset circuit area of the board and cleaned it up, replaced srcs 1-3, and installed the reset generator replacement and the 4 or so other components covered on pinwiki's guide.

Note if you're doing the same, and not installing nv ram, it appears the instructions are incomplete on pinwiki - in addition to those components listed, you also need to reinstall D2 or you'll get adjust failure messages as battery power is not making to u25 to keep the memory set...

I also found some corrosion on the main cpu socket, so I removed and replaced it.

So far the game is back up and running, zero reliability issues thus far, though I need to stress test it and play for more than the 45 minutes or so I could get in today.

I'm sure this is not the best job, but here's an after pic (before I discovered D2 was needed and added that back...)

I also obviously sanded down the traces there, to remove corrosion, that run user the original battery area, up to the srcs. Cleared over them afterwards.

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