That's great!
I'm glad you were able to determine what chips are in the machine.
You're on your way to learning how to understand your machine better.
A couple of things to remember:
1). Never take out anything or put anything in ( Esp. the MPU board, or door optics ) with the power switch "ON" -
that's a good way to royal screw up things and burn stuff out.
2). Look at #1...
Okay, now we want to learn how to set up your hopper limits so that when you get a jackpot or a certain amount of credits built up you don't have to continuously feed the hopper with coins to finish the payout.
You game chip ( SP731) is a classic S+ chip.
It's very easy to use and program.
But now you have to learn how the IGT programmers did things back in the 80's...arghhh!
There's 3 areas you have to learn for programming an S+.
1). The reset key - this key ( when the door is closed) gets you into the "Accounting Mode" - the books and recordkeeping.
But when programming, it flips you through "pages".
2). The little white self test Test button ( Yours might be located on the MPU cage. Newer machines had them up behind the power switch.) The button gets you into the programming pages or "self test mode" It switches "pages" forward through the self test mode.
3). The button deck. The Bet One Credit button does the same thing as the Test button - switches pages forward while the "Change" or "Service" button goes backwards through the pages in the options.
I generally never use the backwards button and just go forward all the time with the Test button.
You'll learn that it will always go up to about page 9 then get sort of blank then either starting over at (0) on the Coin Played display or goes back into game mode. Pressing the Test button just get you right back into the programming mode and you can get out of it anytime by pressing the test switch past page9 or simply closing the door.
Okay, now open the door, power up the machine.
The machine's "boot up" sequence kind of goes like this>>>
The fluorescent lights come on, the Insert Coin flashes and a zero is displayed in the Coins Played window.
Then the reels do their "maiden spin" - it's ready for programming now.
Press the test button 12 times or until you see a [7] in the Coins Played window.
That means you're on "page 7" of the options settings in programming mode.
Page 7 is the "Max Hopper Pay" option.
Your SP731 chip uses the dip switches on the MPU board really so you are probably seeing some crazy number in the Winner Paid window.
Someone programmed it for some amount really high and that's why the machine
never goes into the hand-pay mode.
The dip switches on the MPU are settable for 300, 400, or 600 coins max or "programmable".
Whoever had it before you had the dip switches on "programmable".
At this point.
Turn off the the power switch and remove the MPU board from the cage.
Looking towards the bottom left-hand corner, ( With the big transformer facing away from you and 4 big black capacitors on the right ) you will see a bank of 8 dip switches.
Turning "OFF" switches 1 & 2 will allow the hopper to pay out no more than 300 coins.
"On" is towards the right, "OFF" is towards the outside or left-hand side of the MPU board.
Leaving dip switch #1 "ON" and #2 "OFF" is for 400 coins.
Pick one you like...leave the other dips as they are.
Any credits accumulated higher than 300 or 400 (whatever you set it for) will put the machine
into a "Hand-Pay" mode when the Cashout button is hit.
When that happens, all you need to do is turn the Reset key once to run off the credits on the display.
Go ahead and re-install the MPU back into the cage and power up the machine.
You oughta be back in business!
If you have any other questions about programming, please ask here and we will try to help you out.