Triple Double Diamond slot machine making grinding noise at end of cycle

[Jnickels]

Can anyone help determine how to stop grinding noise at the end of the spin? Just started and not sure why. It happens when it is done spinning. I tried to attach 5 sec video but it says it is too large.

[Stayouttadabunker]

 
Upload video to youtube.
Attach link to youtube video, here.

[Jnickels]

[shortrackskater]

Video modified to remove the numerous videos attached in a string!
Topic moved to IGT S plus.
moderator

Sounds like one of your stepper motors maybe?  Stayouttadabunker will reply soon! 

[Stayouttadabunker]

Haha...I have no idea where that sound would becoming from?
Is it a mechanical sound byte coming through the speakers, or a physical metal grinding noise from inside the machine?
It seems to come right after it's completed a game.

Maybe it's a mechanical counter jammed up?
The gears inside a counter housing might be shot.

On the motherboard (long circuit board on the floor), there is a black Molex plug connector in there that has mostly brown wires coming out of that back of it running up to the mechanical counters on the right-hand side cabinet wall above the reel shelf.
The plug we're talking about is at location [J5] on the motherboard.
In the very center of the black Molex connector, there's a tiny molded tab that you depress, that allows the plug housing to release from the header socket.
Push on it and pull out the Molex from the [J5] socket - that will disconnect the counters.
Now play a game or two to see if that grinding sound goes away?

[shortrackskater]

Haha...I have no idea where that sound would becoming from?
Is it a mechanical sound byte coming through the speakers, or a physical metal grinding noise from inside the machine?

It sounds like it has gas! 

I wonder if it's the solenoid?

Yes you need to let us know if it's coming from the speaker or the machine.

[lookes]

Sounds like handle solenoid from the timing.

[Stayouttadabunker]

If it's that, fairly easy to check.
Just dis-connect the 2-pin black Molex connector on top of the handle mech in the top right-hand back corner underneath the reel shelf.
That would dis-able the handle solenoid to see if that's what's causing the noise.

[Sunrise Side]

Coin comparator rake coil? Weak cap on camparitor?

[Jnickels]

What does the coin comparator rake coil look like?  That is where the sound comes from

[Stayouttadabunker]

Pull off the CC from the plastic clips and turn it around.
On the back is a slot.
In the slot is what we call the "rake".
It's attached by arm to a magnetic solenoid which is powered by the two gray wires running to the top of the CC circuit board.
It'll rattle if there's a bad capacitor on the CC circuit board.

If you want, removed the 2 small Philips screws that secure the solenoid and rake to the CC frame, and dis-connect the 2-pin gray harness from the top of the CC.
Save it for another time.
Coins will fall thru straight down into the coin-in optic board that's directly underneath the CC.
That small coin-in optic board is what registers credits onto the game.