Enabling the Dollar Bill Validator (DBV) is only necessary after doing a RAM clear, or sometimes when you change the GAME chip. If you only changed the REEL chip when changing games, this procedure is most likely not needed. You will also need to go through this procedure if you wish to change the denomination on your machine.

There are numerous SET chips available for the S+. Which one is used depends on what options you need to change. This FAQ will only address the bill validator and denomination. If you need to set up progressive options, look at our FAQ on progressives.

Unless you specifically purchased a specific SET chip, most dealers will sell you a SET 15 chip, which will enable the bill validator and allow you to set the denomination for most GAME chips.

With the power off, remove the MPU tray where the game and reel chips reside. You will need to temporarily remove the GAME chip and replace it with the SET chip. Then replace the MPU tray and power on the machine (do not put the hopper back at this point as you will only have to remove it again). If everything is okay, when the machine powers up you should see a 0 in the Coins Played window.
 
Press the white self test button (located next to the power switch) once and you will see a 9    0 in the Winner Paid window. Press the Spin Reels button to change this to a 9    1. This enables your bill validator. Press the self test button again and the Credits window will display a 0. Press Spin Reels and step through to get to the denomination you want. They will go in the following sequence: 1 (if penny denomination is supported by the GAME chip), 5, 25, 50, 100, 500, 1000, 2000, 2500, 5000, 10000 (.01 (if available), .05, .25, .50, $1.00, $5.00, $10.00, $20.00, $25.00, $50.00, and $100.00). Press the self test button when you have the desired denomination selected. When the coins played window shows 0 and nothing else is displayed, power off your machine. Remove the SET chip and replace the GAME chip. Put the MPU tray, hopper, and coin tray back into the machine. Power up the machine, it will display a 61 on the winner paid window, press and hold the self test button, it will change to 61-1. Close door turn the jackpot reset key once, and the 61-1 will clear. Insert bills and spin the reels!!!