Had 250 credits and when i turned on the machine it began as if i pressed the replay button, but i did not. It keep counting down and spinning the spotting disk until it got to zero and the spotting disk index relay starting humming and getting hot while the spotting motor and the CU motor stopped.
I am fairly good a trouble shooting but these machines are complex. Any help is greatly appreciated.
Bill
I don't know this machine but what you're describing sounds like normal operation--most bingo machines remove all replays when the machine is turned on (if there are replays available when the machine was turned off).
Yes they do, except if you disable the anti cheat relay which i have done. Also, if not disabled, the deleting of earned credits does not trigger the spotting disk to search. It is like the start relay is being energized continuously, but from visual inspection it is not.
Thanks though for your comment.
Bill
the spotting index coil is controlled only by CU cam 4A switch.
if the spotting disc index coil is staying powered, it can only be that switch stuck closed or a short.
take a look and see if the timer cams are locked by the timer cams index or if they are stalled and holding the 4A switch closed.
the motors should run if the tilt trip relay is untripped or timer cams index 17A is closed, which is should be unless the timer cams are locked (e.g. when the lock pin is riding the cam edge and when it's lifted off the cam edge, 17A should be closed).
the motors also run when the replay reset relay powers, but it shouldn't if the anti-cheat relay armature is strapped down. Motors running while there's credits and turning off when they zero sounds like the replay reset relay is powering somehow (and the tilt trip relay is tripped) - worth looking at.
now when you turn on the game without credits, the spotting index coil immediately powers?
Yes, if there are no credit the spotting index relay is energized (very loud humming). With credits the machine will constantly search and the credits will decrease, but the machine will play. I can shoot balls, numbers will lite, after 5th ball extra balls will be rewarded (cause the spotting disk just keeps running until it gets to zero then spotting index coil energizes).
I have looked at 4A and i think it was good (I will check again). I am thinking it was the timing cams on the CU, but i am not able to figure that out yet. Is there a way I can manually advance the cams when the machine is off?
the only thing in the spotting index coil is the CU 4A switch.
some terminology is confusing me a bit, so to make sure we're on the same page:
0] mixer/spotting motor is top/right of the back door, control unit motor is left above shelf in the head (looking from the back)
1] spotting wipers - left end of the mixer/spotting shaft at the top of the back door.
2] spotting disc - large contact the spotting wipers are spinning on
3] spotting index unit - just to the right of the spotting disc, releases the spotting wipers to spin
4] replay register - the 3 digit meter showing the credits
5] search wipers/disc - right end of motor unit in head
6] search index unit - on metal shelf just left of the search disc
7] timer cams index unit - on metal shelf closest to the control unit motor
so I'm not sure how to interpret ".... cause the spotting disk just keeps running until it gets to zero then spotting index coil energizes"
the motors run all the time unless the tilt trip relay is tripped. Even if the tilt trip relay is tripped, the replay reset relay or a timer cams index switch can run the motors.
the easy way to look at the control unit switches is remove the backglass and flip the panel down. To spin the cams by hand, you need to unlock them.
if ya look at the bottoms of the cams by the index units, you'll see the arm/pin that is engaged in a cam notch. Push down the arm and you can spin the cams with the power off. If you can't turn the cams with power off without making grunting noises, you've got clutch issues.
if you're in the back of the game, you can unlock the cams by reaching under and pulling in the plunger on the index unit and turn the cams enough so the locking pin won't go back in the notch, then you can move around to the front and turn the cams more while watching what the switches do as the cam lobes lift the stacks.
Yesterday I was reading a manual that Joe Shoppe gave me when i bought some machines from him (is Joe still around, I have tried to reach him multiple times). He always pointed me in the right direction and his book did it again. It is the indexing cams on the CU. Your diagnostic is right on.
I messed with the cams and the drag arm gears and now it works, kind of. Now when i push the red button or insert a nickel the spotting coil spins twice( a lot better than continues).
Thanks for your help. You must know your way around these bingos. I love them. Takes me back to the days in St. Louis when they were in most the bars.
Bill
hi bill,
if the CU cams are turning more than 180 degrees in a "cycle", then it'll be one of the following if it's mechanical:
1] a notch in the locking cam has worn and the locking pin on the timer cams index unit can pop out so the cams turn 180 degrees more.
solution is to the file the notch square, removing as little as you can so you don't shift the switch timing too much. If it's really bad, maybe easier to source a better block of timer cams from a junk game and take the locking cam off it.
2] the timer cams index unit is cruddy so the locking pin doesn't lift up all the way into the locking notch.
make sure the coil sleeve isn't damaged and has no crud in it. Verify the pivot points on the index arm aren't gunked up. If you manually pull in the plunger with the power off and let go, the plunger should yank out quickly with no sign of dragging.
3] clutches are too dry/sticky and putting a lot of pressure on the notch, which increases the wear at the top of the notch.
if the problem is intermittent electrical, I'd expect you'd get a random number of extra cycles rather than always two.
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Portola Valley, CA