Poker Machine Noise
Freesound: collaborative database of creative-commons licensed sound for musicians and sound lovers. Have you freed your sound today? Anyone who has ever walked into a casino has felt the lure of the slot machine. The bright lights, inviting little stools, and the promise of hitting the elusive jackpot are ever-present.
Poker Machine Noise Machines
Due to bandwidth limitations I am storing these files on a popular free storage and download site called MediaFire.
The manuals are free but since I have to use free file sharing platforms these sites always have their quirks, hopefully this one stay up. I will upload more as I have the time so check back.
Free Slot machine repair manuals
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Gambling Machine Noise
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After testing out new methods on a video poker machine, he eventually built the correct contraption. It was amazingly simple. He got a guitar string and attached it to a bent metal rod. Door Alarm - A sound to alert staff to a door on the machine being open What Happens When You Press Spin On the right is a diagram showing a simplified example of a poker machine. The result was a noise reduction of 15dB. The graph shows the effect of the modifications on the frequency content of the noise. The machine efficiency was increased as the greater control over the product vibration allowed the cycle time to be reduced significantly.
Slot Machines have been a part of the gambling world for many years now. In the early years, slot machines where thought of as a novelty, or something to keep the wife busy while the real games were played. All this began to change in the 1960’s, when slot machines began to rise in popularity. By the early 1980’s slot machines began to account for as much as half of a casino’s income. At the present, slot machines clearly rule when it comes to gambling. Casino slot machines can account for as much as 70 to 80 percent of wagering done.
I cannot include every machine ever made as it would not fit in this book. The main games I will cover are the Players-Edge Plus and the Slot-Plus. These games were produced by IGT (International Gaming Technology) and are some of the most popular games ever made. IGT games by far-out number any other slot machine manufacture. Most casinos have 50 to 80 percent of their slot floors filled with IGT games. For this reason I have chosen the Players-Edge Plus and Slot-Plus games to explain slot machine repair.
If you need to fix a different type of game, the same theory will still apply. Certain things will be different, such as error codes and the games software. But much as in the way automobile manufacturers are different, there is still the same basic theory applied in way that they operate.
All slot machine manufacturers provide manuals for each slot machine they produce. These manuals appear cryptic, but provide a wealth of information. If you are working in a casino, the manuals for each slot machine are usually provided. If you are at home however, and don’t have your slot machine’s manual, try to acquire one. You can do this by contacting the manufacture or a local slot shop. (I have set up a site to download the S-Plus or PE-Plus manuals at http://www.npgcable.com/~aranger )
What Kind of Machine Do You Have?
There are three types of cabinet; the UPRIGHT, the SLANT-TOP and the BAR-TOP. The upright games are the most common cabinets and simply sit upright. The slant-top games are games that lean out in the middle (you can set things on a slant-top as you play them). Bar-top games are made to slide into a pre made cabinet at a bar so they will be flat and small.
The main identification on slot machines is a serial tag located on the outside of the machine. On upright games, the tag is located on the lower right-hand side. For slant-top games it will be located below the armrest on the right hand side. And bar-top games the front right hand side. The serial tag should have the manufacture, serial number, date made and the model number.
Slot Machine Basics
Slot machines took a huge leap forward in the late 1970’s with the invention of microelectronics, up until then, all slot machines where entirely mechanical or electro- mechanical. With the use of microelectronics, the video poker game was born, along with much more efficient slot-reel games. The old mechanical games used all kinds of springs, levers and gears to carry out its functions.
With microelectronics, almost all of these functions are placed on a single circuit board. There are several circuit boards in modern slot machines, but one circuit board stands out as the most important. This board is called the MPU (Main Processing Unit).
The MPU
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The Parts
All poker machines are made up of a range of parts. These include external parts and internal parts. Below we list the major parts.
External
- Cabinet - This houses the game and comes in a variety of types
- Video Screen - This is where the game is displayed
- Buttons - Found under the screen and used to interact with the game
- Note & Coin Acceptor - Used to insert coins or notes into the machine
- Top Box & Belly Panel - Used to display game artwork and pay table
- Coin Tray - Found at the base of the machine. Paid coins collect here
Internal
Poker Machine Noise Sound Effect
- Motherboard - A computer component that holds parts such as RAM
- EPROM (Erasable Programmable Read-Only Memory) - The game logic
- Interface Card - Connects the EPROM and motherboard to the buttons
- Meters - Record all game data, pay outs, money in, etc.
- Cables - Connect the screen, motherboard, buttons, etc.
- Note Validator - Checks all inserted notes for authenticity
- Lights - Found behind the top box and belly panel art covers
- Cash Box - Stores all notes inserted into the machine
- Hopper - Stores all coins in the machine releases wins to the tray
- Speakers - Play the game sounds such as the win music
- Door Alarm - A sound to alert staff to a door on the machine being open
What Happens When You Press Spin
On the right is a diagram showing a simplified example of a poker machine. The virtual reels have been extended out of the screen to show that they continue past the visible screen area.
You will notice that each of the symbol positions has a different number. In our example there are 15 symbols per reel but there can be anywhere from 10 to 1,000's of symbol positions.
While the reel positions have different numbers you will find that there are more lower paying symbols on each reel than higher paying ones. For instance a low paying symbol could be in positions 2, 5, 9 and 11 on reel one.
As soon as you press spin the EPROM randomly selects five numbers - one from each reel. In the example on the right this would have been 6, 30, 38, 51 and 69.
The reels then spin and come to stop on the selected positions. You are then awarded any resulting wins and then have the option to try to double up your win. The games pay back percentage (RTP) is controlled by the symbol positioning through extensive mathematical testing.
One point to note is that the symbol positions never change and that the casino or pub cannot change the payout percentage. For this to be changed a new EPROM must be installed. Each game type can come in a variety of different payout levels.
Online Pokie Games
Online pokies work in exactly the same way with the only real difference being that instead of an EPROM, the game logic and RNG is on a remote server that your game connects to.
When you press spin a message is sent from your computer to this server and the server returns an encrypted set of numbers that resolve to the symbol positions you see on the screen.