So as my last post said, I finally had my bad girls working. My buddy who is an electrical engineer and repairs circut for dnd looked at my mpu. He replaced a few broken traces, fixed up the daughter board and repaired a broken connector on the reset circut. After that it is working beautifully. We played it the other night for a few hours, but today we went to have a game and it's locking up again.

Basically, it will boot up, go into attract mode, take credits, but when you hit the start button it locks up. I've gone into diagnostics mode, and everything tests fine. It shows switch 75 closed when a ball is in the trough as it should.

Any ideas where.to start? I'm a little frustrated at this.point.

Cheers
Greg

I'm thinking it's with the switch. It was flakey when it was working. Example, I was in the midle of a game and my buddy drained his ball. It didn't seem to recon is the ball was in the trough and wouldn't spit out a new one to start the next round.

And for the record, whoever I bought it from did all the ground mods already. When I do test mode, it shows switch 75 closed when there are 2 balls in there. That's correct yes?

I checked the +5 at the cap and got 6.10v. Adjusted back down to 5.03v. Cleaned the switches and made sure it was registering fine. I looked at the diode boards but didn't see any cracked solder joints. It still seems like it doesn't see the balls, in the trough, but the switch works for sure. I obviously pushed on the daughter board but that didn't do anything.

Thanks for the suggestions so far. If you have any others I'm all ears.

Yes all the electronics seem fine it would seem. Like I said it was working perfectly fine 2 nights ago. The switch tests fine in switch mode. I never thought about the coils. I'll test them later when I'm down at the shop again. I kept bypassing the coil test chasing after the switches.

Hi Guys,

I'm getting back to this thing now and have a couple updates.

1 - I changed all the switch matrix (and all other cpu single sided) connectors
2 - I confirmed the switch matrix is functioning correctly
3 - When there are 2 balls in the trough, sw 75 is closed
4 - +5 is holding stable since I turned it down

Tonight I want to start probing the cpu to see if I can find anything wrong with the IC's. But can someone point me in the proper direction? What specifically tells the ball to shoot out after you hit the start button?

Thanks for any help you can give me

Unfortunately that didn't work either. I think I'm just gonna bite the bullet and purchase a new swemmer board.

Yes all coils and switches pass the tests.

My game won't go into start mode though. Basically it locks up with a couple playfield lights lit. I've decided I'm going for a repo MPU for it as soon as I save up the cash. It's 100% been hacked before I got my hands on it. The new board will save me a really large level of frustration haha. I still have a broken DE Playboy 35th I have yet to start looking at. Luckily, parts seem to be much more common for those games.

Back at bad girls and I'm hoping for a little bit of advice. I got the mypinballs board and it's working great so far. But I'm trying to track down a little problem. It's all in the "ball" drop targets, and 8 ball drop target.

I'll try to explain it as clear as I can without confusing anyone or myself. Basically this is what happens, when a game is started, the 7 targets will reset no problem. They seem to keep the memory fine from player to player, but where the problem is, if you finish a re-rack bonus, they will reset but immediately go back down like you have hit them all again, thereby starting another re-rack bonus mode.

The 8 ball target is acting funny too. A lot of the time it won't pop up when a game is started, but if the lock is lit, and you shoot the eject, it also won't pop up; releasing the ball right away (it's supposed to pop the target up, then you shoot the ball, and then it releases the captured ball) It will work properly sometimes, but not very often.

I hope this explanation is clear enough. I can't help but think these 2 issues are related, but i'm stumped on where to start. I have already put new connectors on the CPU. I didn't do the ones on the driver, except I did do the interconnect cable (new kit from docent)

If you have any ideas, they would be most welcome.

The coils, switches and relays all seem to be working fine in test mode, so I think I'll start with the connectors on the driver board and relays and see what happens.