Quoted from monkfe:
So now that I finally have my game back together, I'm having one issue with the battlefield drop targets. When I boot the game up, the coil fires and the targets reset as they should. When the ball enters the VUK, the coil kicks several times even though the targets are already up. Upon the ball entering the playfield, the ball will hit the targets multiple times before dropping (as it should ), once dropped and the ball falls off the playfield, there is no reset, even at the end of the game. the coil tests good in the solenoid test and resets no problem. The opto switches also show as working correctly in switch edge test, and turn off when the target is dropped. I was planning on putting in a new connector on the MPU board where the switch wires come in to rule out a intermittant broken wire. I also repinned the connector at the bottom of the battlefield opto board. I see this problem going back quite a bit, but can't seem to get a definitive answer as to what the cause may be.
Sound like you're checking the right things. Sounds like 2 issues to me
The coil activating multiple times is typically a drop target switch issue, also that the target doesn't get put back up is also indicating there's a switch issue. But I would have expected you'd notice it in the switch test - maybe worth cleaning the optos, checking all the connectors and checking no issues with the 12v power going to the opto board
TS 4 bank optos (resized).JPG
The drop targets also have a tendency to get gummed up, which will stop the target dropping when hit? If you have already stripped them down and cleaned the assembly, then maybe it been reassembled incorrectly causing the extra friction?? You should be able to drop the target with a small tap on the front of the target.
TS 4 bank (resized).JPG