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Hello All, Im working on a S-2000 slot and I need to modify the machine to pay ONLY one coin on any win. The rest of the credits need to disappear, The machine needs to be ready for more play on its own  after a payout of only one coin. I realize I can set the max coins payout to 1 and larger wins will require a handpay/key reset. Im working on a circuit which after a 2 coin+ win the hand pay key switch signal would be closed for 1 second and the machine would inturn "reset itself" Unless someone has an easier method. Thanks in advance.  John Ross :103-

I hope you are ready to learn SAS (Slot Accounting System - IGT)
The S2000 can be have the hand pay remotely reset via SAS command
can be done on a Arduino and a Max232 (EIA232 driver/reciever)

Or a momentary switch on the player panel to replace the key switch on the side. They'd still have to push it, but it would be simple. Depends on the environment it's going to be used in I guess

i have worked on similar setups its not quite as easy as you would expect. the hand pay also triggers the accounting menu and this can make some strange problems if you make any changes to the button harness. your simplest solution would probably be a device that goes inline with the hopper when the machine pays out it runs the hopper once then simulates the rest of the pay out or hits the key once. if you want to try a purely mechanical solution you can try a micro switch in place of the key switch that gets depressed by something on the hopper its self, with this approach tho i see you having a problem with the hopper cycling too fast and keying the machine multiple times.

Some hoppers use a micro switch to count the coins payed out.     :103- :103-

than it may be as simple as just using that, but if it were me i would try to keep the 2 inputs isolated by having the micro switch trigger a pare of opto isolators or transistors one in place of the micro switch in the hopper and one for the key.

but before going to that amount of work will the machine hand pay if it is already in the middle of a hopper cash out?

Most S2000 hoppers have coin optics but the coin does not pass through the optics
the coin trips a lever that blocks the optics just like a coin would, to prevent cheating the coin out optics.
the problem is the delay between the single coin out and the machine triggering hand pay, not fast enough for a micro switch on the hopper to trigger the hand pay reset.
machine is going to wait for the single coin to be paid before going into hand pay

The other thing is you are going to have to be sure all wins pay the 1 coin then go into hand pay mode
you have a few settings in limits and a couple places to configure to make it work with the key before creating something to reset it after every win. and I can tell you there is no easy way to detect hand pay mode unless you use the correct candle wire to do it. but any tilts that activate the same candle light are going to cause you to activate your reset system.

That is why I say a Small SAS host -- Micro Controller based of course to do the serial communications needed can do it without having to tap into the candle or the reset switch circuits