J107 provides the high voltage to several solenoids - one being the trough.
I think Nick might be on to something. The game passes self test until a game is started, then the ball is served and the fuse blows. "One ball" might mean the "solenoid 04" fires and then blows F111.
To prove this - put the game into test mode / solenoid test and test each solenoid. The fuse should be fine for individual solenoids 01 - Top Right Popper, 02 - Left Subway Enter, Flasher, 03 - Lower right popper, 04 - trough - THIS is when we may expect the fuse to blow.
We can isolate the problem to a particular coil or flasher. I expect either a coil / coil diode or driver transistor.
