Sing Along
Gottlieb, 1967On 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?
Quoted from gottguy: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?
Maybe I'm off here, but I've always understood that the bells/chimes of a game are activated by a switch on the relay associated with the target/rollover?
If so, how is the bell working but the relay isn't?
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
Which rollover numbers are having an issue? The logic is split between two groups of them.
#2 and #3 rollovers trip their relays, which activate the P relay.
#1 and #4 rollovers trip their relays, which activate the Y relay.
Quoted from DirtFlipper:The bells are driven off the points relays (i.e. M and L), not the rollover relays.
Yeah, that's what I was thinking. There's always a switch on the score reel relay that activates the chimes/bells-didn't word that properly.
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
Quoted from gottguy: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
OK, so it's sounding the bell but the bank relay isn't letting the relay change states? Is it scoring?
This is kind of strange.
You're saying that if you hit the rollover by hand the relay works correctly, but it won't if you roll the ball over it? Have you tried cleaning and adjusting the gap on the rollover switch?
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
Are the relay armature plates and trip plates clean and degunked? (After that, a slight dab of SuperLube on the latch point can help.)
Quoted from gottguy: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
So if you depress the rollover by hand it generally works, but it doesn't work with the ball? Or it works part time with the ball?
Have you put a DMM on the coil to see where it is? I doubt this is the problem, but you never know.
A rollover switch not working with the ball rolling over it but working when depressed by hand suggests that the switch isn't making good enough contact via the ball, and your hand activating is making the switch make better contact, thus improving the current flowing to the coil. I've had this happen on games before, and it's uniformly been resolved by closing the gap on the switch and making sure the switch is closed a bit quicker when the rollover starts to be depressed.
Always works by hand....usually by ball...tried closer gap...will test coils next. Maybe latch is sticking
I don't know why the latch would stick when the ball triggers the switch, but not by hand. Always working by hand tells you the coil is good, and not the issue.
What I was trying to get across is that when you trigger it by hand, you're pressing harder than the ball will do, and probably for longer. So to me, the cure would be to adjust the switch so it makes much quicker when the ball starts to roll over it. That gives a longer, possibly stronger connection.
It's possible the latch is sticking but why only with the ball on the rollover? This just smells like a rollover switch adjustment issue to me.
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Kansas City, MO