Hobbies And Interests
Things You'll Need
Instructions
Turn off the slot machine. Open the front door and remove the CPU board by pulling the black knob. Lay the CPU board on a work table.
Locate the battery. Remove it by using a soldering iron to melt the solder. Use the solder sucker to vacuum the melted solder wire.
Position the new battery and attach it to the slot machine using a soldering iron and solder wick.
Remove the chip from the socket labeled "Game Prom." Replace this chip with the clear chip designated for the machine. The clear chip is usually included with the slot machine and is used to reset the machine if a problem arises.
Install the CPU into the slot machine and turn it on to test it. During start up the screens will display a series of numbers. This is an indication that the memory has been reset.
Check the machine display. During start up, the left display should read "01" and the right display should read "254." The value will change to "02" and "999" accordingly. This is an indication that the memory has been reset.
Turn off the machine and take out the CPU again. Lay it on the work table and remove the clear chip from the "Game Prom" circuit.
Reinstall the set chip into the "Game Prom" circuit. Put the CPU back in the slot machine and power up the game.
Check to see if the display reads "91." This means that the reset was successful.
Press the button to spin the reels and toggle the setting from "On" to "Off," and "Off" to "On." Press the diagnostic button to confirm setting.
Set the denomination of the machine. The default for most machines is a nickel; however, many machines are set at other levels so the value should match the amount that will be used (for example, "25" for a quarter). Press the diagnostic button to confirm setting.
Turn off the machine and remove the CPU. Remove the set chip the same way you removed the clear chip. Install the original chip into the "Game Prom" socket.
Install the CPU into the machine and close the front door. Turn on the slot machine to test it.