Since about half a year, I am the owner of a Capcom Airborne. It has not been flawless, but until now I have been able to tackle everything myself (as in: broken wires, switches and short ground). Recently, a new problem surfaced:
During the game, it randomly seems to "end the ball", as if it was drained. It does not happen every ball, but during one game (3 balls), at least one of them will end this way.
What have I done so far?
0. Enter diagnostics. There are also no warnings indicating a switch, row or column is out. (just 2 lamp warnings).
1. Enter switch test, all opto's and switches that register where a ball could be locked (trough, jet lock, R lock, L lock, work. I also tried to lock balls, to see if hitting another switch would cause a whole row or column to register (which could indicate a short row/column/blown diode).
2. I have replaced the switch indicating a ball is in the shooter lane, because it was faulty, but this did not fix the problem.
3. Then I suspected the opto's in the trough to be faulty (thinking, if blocked, it could detect a ball, ending the game). So, I cleaned them and all connectors, but the problem remains. Also, during glass-off tests, it does not end the game if trough opto's are blocked during game play.
Two things I will mention, because they might be related:
1. I have upgraded to the latest ROM version (1.6), I do not remember I had this problem with the old rom.
2. The micro switches for the drop targets seem fiddly. During switch test, they seem to keep on registering intermittently: If I drop S, it registers S, then I drop H, it registers H, and also it registers S again a few times. Might be far fetched, but maybe the hyperactive drop target switches throw off the software, resulting in ending of the ball?
I am hoping someone recognizes the problem, or could point me in the right direction?