Hey guys, having some trouble with my Flash project. It has been blowing F2 ( which measures 36.52vdc+ instead of 28v) (don't know if that matters). What's weird is it let me play for a couple games but not always_, and further more, in the middle of play (even after testing all switches and solenoids) it just starting going crazy. (Come to think of it, I haven't tested the replay knocker for shorts). After it goes amuck, I power it down and turn it on, and it still goes amuck. I cannot always start a game even after it sits for hours, most of the time it just starts flickering the display w/or without noise on power up.

Pretty vague I know, but usually that's how these things go.

What I know:
-On power up, it starts a game and all solenoids are active (unless powered by the blown F2) (i.e trough)
-1J2-9 reads 12v+, not 5v+ as stated in a driver board print out I got from ipdb - though it does say 12v+ in the schematic, so I'm confused on that.
-F2 reads 36.52v+ instead of 28v+
-All 5v+ pins read 5v+ except one above
-All 18v+ pin's read 18v+
-All 12V+ points read 12V+
-Under the hood there doesn't appear to be any broken or touching wires. There was a broken diode across the slam tilt, but I repaired that (prior to that repair, you could hear the tilt noise on start up..).

The board did suffer some damage from battery leakage, but it looks like it was repaired.

The video of startup:

IMG_3851 (resized).JPG

Any upgrades that can be made in place of that 40pin connector? It's just connecting the two boards together, correct? No ribbon cable option? Just want to make it hardened for future use. Any parts you recommend?

Thanks,

Grant

K I will remove the bottom board this evening and reconnect. I purchased a replacement IC kit for the whole system 4 board suite. Will install even if this evenings adjust temporarily solves it.

Will update soon!

Grant

Well it looks like it may have been that 40 pin IC. I pulled the boards and checked for cold solder joints throughout, none to be found. Reinstalled and haven't had issue.

Now to tackle remaining issues:

1: "machine gun slingshots".. Thinking this might just be the switches rebounding too far and firing solenoid multiple times.
2: "weak" drop target reset solenoids. HOPING this might just be bad coil sleeves. I will give them a cleaning and see.
3: "weak" right slingshot. Think it might be because it's using a 23-800 instead of the 23-900 that the left sling is using.

That’s my plan already on its way.

Any ideas why my right sling shot may be weak? They both measure 23v.. the left is an 23-900 and the right a 23-800. To my understanding the 23-800 should be stronger.. I just replaced the sleeve.. no luck.