On my Sing Along a couple of the # rollovers will sound the bell but the associated relay won't trip. This only happens randomly.Ive cleaned the rollover contacts but it persists. I can't get it to replicate by hand. Weak relay coils maybe? Weak spring?

Its a latch type relay that trips and stays that way until the next game...if it sounded the bell it would stay locked on I would think. I think the bell is fired along a path off the rollover switch.

The bell rings whether or not the relay unlatches. I can hear the coil firing when going over a rollover even when it fails to trip. It appears the coil is unable to pull the latch in fully or the spring is weak

Maybe the coil isnt getting a long or strong enough pulse

Red #2 rollover did it once today. It also happens occasionally to the red #3 standup target and the white #3 standup target. For example...the ball hits the rollover or target, the bell works and the associated relay coil in the bank buzzes but the bank relay for thst numb
ber doesnt unlatch. If I activate by hand it will trip the relay for that target or rollover every time. Its like the ball hitting it isnt keeping it energized quite long enough or the trip coil is too weak

It works almost all the time. When it doesnt is when the ball is involved. The relay coil fires but not enough to trip the relay so that the rollover lite goes out and turns on the one by the kickout hole...wont unlatch the bank relay

Cleaned and gapped rollover switches, Its as if the coil is too weak to trip relay ...doesnt do it consistently

Yes scoring normally

Always works by hand....usually by ball...tried closer gap...will test coils next. Maybe latch is sticking

It did/does to me too...I will revisit it again