Slot Tech Magazine Editorial Opinion

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3 Editorial Opinion Page 3-Editorial Page 4-Quick & Simple Repairs #109 Page 7-Regional Slot Tech Training Page 10-WP210F11 Page 16-Slot Tech Training in Aruba Page 18-Lamps! A list of common lamps Page 19-SMD Markings Page 20-Resistors! How to interpret SMD resistor marks Page 22-Subscriptions Regulation is Wonderful This ain t the Wild West no more. Where a Three-Card Monte operation might once have been perfectly acceptable at a local saloon, today s casino patrons can always be assured of a fair game, run by an international industry that is totally free from participation by felonious individuals. Or is it? In many cases, there is nothing that prohibits a felonowned company from doing business with licensed casinos and equipment manufacturers. I do not believe that it is acceptable for a convicted felon to do business in the regulated world of casino gaming. Are licensed gaming manufacturing companies not compelled to prohibit their own commerce with felonious individuals, regardless of how tenuous the connection might be? I believe they should be. As a casino operator or vendor in the casino industry, do you not want to be assured that the companies with whom you do business are free from any connection to felonious crimes? I believe you should be. This topic has been covered previously in an article published in Casino Enterprise Magazine in January The article seems to support the contention that some felonies are probably OK while others are not. I disagree and believe that, as an industry, we need to draw the line at felon. I don t think we should get involved with any subjective evaluation in this regard as this will lead down a dark and dangerous tunnel. Felony DUI is okay but larceny is not? A little bit of burglary can be overlooked but we draw the line at assault? You can look at a list of felonies and check off the things you think are deal-breakers and those that you find are acceptable but I believe that there is an obvious red line here and it s called felony. I am absolutely NOT saying that felons should never be employed. There are many other industries in which a felon can find work. Naturally, I want every citizen to be a productive member of society and employment or entrepreneurial enterprise is a major part of that. They d also be welcome as casino customers. It is not a matter of whether or not they are trustworthy or have paid their debt to society or have been rehabilitated; they are tainted. A felon is forever tainted (there is no such thing as an ex-felon. Once you have been convicted of a felony, you are a felon for life unless, or course, your conviction has been reversed) and, as such, as a wellrespected, well-regulated and well-enforced international business, based largely on the trust of our customer (the casino patron) that we will provide a fair wager in a safe environment, I believe that OEMs, operators, and vendors alike must eschew any business relationship with felonious individuals. Randy Fromm Randy Fromm's Editor Randy Fromm Technical Writers Glenn Allen, James Borg, Jason Czito, Vic Fortenbach, Henry Kollar, Chuck Lentine, Kevin Noble, Pat Porath is published monthly by 401 W. Lexington #777 El Cajon, CA tel fax editor@slot-techs.com Visit the website at slot-techs.com SUBSCRIPTIONS Domestic (North America) 1 year - $ years - $ International 1 year - $ years - $ Subscribe online at slot-techs.com Copyright 2014 under the Universal Copyright Convention. All rights reserved. Let s keep gaming felon-free. Shortened links to the abovementioned article are listed below. Publisher-

4 Slot Tech Feature Article Quick & Simple Repairs #109 By Pat Porath WMS Bluebird MBR Read Failed-I/O Error Irecently had a Bluebird with an MBR read failed, I/O error. A floor supervisor stated the game also showed a flash error before a power cycle. When it started to boot up, just above the read failed the monitor showed game kit flash validated which told me there was a pretty good chance the game CF card was OK. After opening up the CPU board area, it was obvious dust bunnies may be part of the problem so I took the board outside and blew it out with compressed air. I also inspected the fans to see if they looked OK. Both the game and OS cards were reseated too yet the error appeared once again quickly after an attempted boot up. Next, I made sure the BIOS and jurisdiction chips in the CPU area were seated nice and snugly, which they were so that more than likely wasn t the problem either. I called over the Page 4 radio for a second opinion even though I was quite sure the OS card was bad. The tech asked for the OS number so they could look to see if we happened to have a spare. Luckily we did. They inserted a replacement OS CF card into the CPU, power was turned ON once again, and ignition... we have liftoff the game booted up all the way. IGT AVP Crystal Core We recently received a pair of IGT AVP Crystal Core 4.0 games. At first I was like what the heck model is this? It has the new IGT logo on it, an LCD type button panel and a huge upper LCD so I thought I would take a picture of the inside because it looked pretty darn neat. IGT G20 Slant Door Open F Problem Since I was the only technician on duty at the time, I was called to a slant top game in which a door open f wouldn t clear. It may also be known as the main door, front door or hood door. This game it didn t have door optics, only a standard white cherry switch. Connections were checked and such; nothing appeared unusual. For the heck of it, my small screwdriver was used to short out the other side of the switch because only three of the six pins were being used. Oddly enough, the door open f showed closed for a second. I removed the switch, moved the three pin connector to the other unused side of the switch, then pulled out October 2014

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6 the switch to complete the circuit to simulate a closed door. Sure enough, it worked perfectly. Maybe it could be classified as an FM repair. Editor s Note: Pat, I had the same thing happen to my wife s Hyundai Tucson. The air bag light illuminated on the dashboard. The computer fault code indicated a bad switch in the passenger seat buckle. The dealer wanted hundreds of dollars to fix it. I politely (well, maybe notso-politely) declined the repair. It was actually just bad interface. All I did to clear the fault was disconnect and reconnect the seat buckle connector. Damn, I love being a repair technician. IGT G20 Board Monitor Tilt 12v Out of Range An IGT G20 upright game had a board monitor 12v out of range error. I ve seen 3.5v out of range and CPU temperature out of range but it was my first time seeing a 12v out of range. There are 3.5v lithium button type batteries in the brain box area and a 9v battery pack located on the motherboard so where does the 12v error come from? The answer to my question was an item called an ATX board, a sort of power distribution board. The IGT part number for it is W. After it was replaced with a spare, the error cleared. Page 6 Bally CineReel Please Remove Voucher Wouldn t Clear First of all, a door reset, a cabinet reboot and refeeding paper wouldn t clear the error. Every time the slot door was closed the please remove voucher error would appear. The ticket taken optic was quickly cleaned with a dry Q tip which didn t help either. The Epic 950 printer was reseated along with a full game reboot. Nothing would clear it. Even though it would print a self-test ticket and a demo ticket, it would not work properly in regular game mode. I replaced the printer with a spare. Once replaced and after another boot up, the error finally cleared. October 2014

7 NEW PROGRAM Regional Slot Tech Training Attend or Sponsor a Class Near You! Classes Available: Pinetop, AZ October HON-DAH Resort Casino Tower, Minnesota November 10-13, 2014 Fortune Bay Casino This is a fast-track class for slot techs who want to learn the quick and easy way to fix monitors and power supplies without having to learn a lot of electronic theory or mathematics. If you are interested in sponsoring a regional class at your property, please contact Randy Fromm for details. Since 2001, has been holding slot tech training classes at casinos across the USA. These classes have mostly been held at larger properties with a dozen or more slot techs from their own slot department attending the class. In order to serve our smaller cainos (with, perhaps, just a few techs) we are now holding regional classes that are open to all slot techs that wish to attend. This is the full, four-day class that covers power supply repair and LCD monitor repair, down to the component level. To Enroll: Download the enrollment form at slot-techs.com Class Schedule 9:00am-4pm Daily Day 1-Beginning Electronics for Slot Machine Technicians This segment assumes that you have no previous electronics training and takes you through a simple, NO MATH look at electronic components, electronic circuits, schematic diagrams and more! Using a Digital Multimeter The DMM is the single most important piece of test equipment you can use. Electronic Components All of the individual components used in gaming machines are introduced. Students learn how to test them for proper operation. Day 2-Diodes, Transistors & Other Semiconductors Hands-on Transistor Testing Lab This part of the school takes a look at all of the different types of semiconductors commonly seen in gaming machines. We'll take a look at the operation of each component, along with testing procedures to determine if the part is good or bad. October 2014 Day 3-Morning Session-Soldering Good soldering technique takes practice but there are some tricks that can really help speed things along. During this segment, each student will be provided with their own soldering supplies and a fun project kit they will assemble. This equipment will be theirs to keep. Day 3-Afternoon Session-Power Supplies (continues Thursday) This module covers all types of power supplies, including linear power supplies and the Switched-Mode Power Supply (SMPS) found in virtually everything in a modern casino. Day 4-Afternoon Session-LCD Monitor Repair LCD Monitor repair is generally pretty easy thanks to their modular design. This segment covers the theory of operation of LCD monitors. There will be a presentation on component-level repair techniques, CCFL testing and replacement and using LED strips as backlights. Includes free CCFL tester! Cost of the Program Tuition is $795/person Includes: Digital Multimeter Soldering iron, tools and soldering supplies Sample components Soldering Instruction Kit Textbook Students are responsible for their own meals and lodging. If you re interested, please contact Randy Fromm right away. It s first-come, first-served and there is a very limited number of places available in each class. Randy Fromm 401 W. Lexington Ave. #777 El Cajon, CA You can fax a PO to and we ll invoice you. Be sure to include the student s name. Page 7

8 WMS BB1 Reel 1 Tilt When arriving for my shift, there was a WMS BB1 stepper game turned off that had constant reel 1 tilts so I had to check it out. During boot up, all the reels spin slowly but reel 1 was spinning at a slightly different RPM. With power off, I reseated it into its connector. This time it appeared to be OK. When the door was closed, part of the reel frame decoration located on the door was slightly touching reel 1. It was slightly tweaked so there was enough clearance for the reel to spin without touching it at all. I downloaded some promo cash to test the game to make sure it didn t have an error when a customer was playing and it was fine. After testing the game for a few minutes it was fine, no tilts at all. obstructing the touch screen? I went into diagnostics to test the touch screen and it didn t seem to work at all. A quick calibration fixed the touch screen so it worked correctly. The customer gave the game a few spins, it worked OK now. No doubt something was going on with the touch screen before it was calibrated. Konami Slant Not Printing Tickets We had a slant top newer Konami game locking up for hand pays instead of printing tickets. It took me a little while to figure it out but I got it. Including other manufacturers of slots, sometimes if a game isn t accepting promo cash or not printing a ticket and locking up for hand pays, rebooting the Oasis Sentinel may fix the problem, or taking the game offline then putting it back online sometimes fixed the problem too. In some cases, rebooting the game may make it print a ticket properly. Also making sure there is game TO system communication and Sentinel TO system communication, where on a Sentinel III there is a yellow or red border around the Oasis display. Paper was reseated, it even would print a self-test ticket but not a cash-out ticket. On an older Aristocrat game, if EVERYTHING else fails, the game needs to be RAM cleared for it to print properly. The last thing I tried on the Konami was reseating the printer. For some odd reason it worked. Afterward it printed three cash-out tickets perfectly. - Pat Porath pporath@slot-techs.com WMS BB2 Reel Complaint, Not Fake A floor supervisor called me to a WMS BB2 video slot in which the 4th and 5th reels would stop prematurely. What the...? I ve seen some weird and unusual stuff with slot machines before but this was a first for me. I asked the customer to spin the game for me, sure enough the reels did stop as if a player button was pressed, even though nothing was touching a button or the screen. Was it a sticky button or something Something goes in here. Could it be your advertisement? Contact Randy Fromm for cheap advertising in Slot Tech Magazine. Page 8 October 2014

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10 Slot Tech Feature Article WP210F11 By Herschel Peeler This is a big one. Let s start by breaking the circuits down into sections. The drawing VIPER12A shows the AC coming in. No surprises here. The standard design of line filters to keep the noise the power supply generates off the AC line. Not many failures here. It gets rectified to generate the B+ line, about 160 VDC. Between the negative side of the bridge and ground there is a small circuit made of two parallel Ohm resistors and a couple of diodes. This is our current sensing circuit. It will generate a small negative voltage proportional to the current on the B+ line. This will be no more than 1.2 Volts, limited by the diodes. Viper and V CC Next in line we have the Viper12A that takes the B+ line down to generate Vcc. This is the second thing Page 10 that happens in sequence. The Vcc powers other circuits to get the power supply started. This is a high failure point. Failures can easily be troubleshot with an ohmmeter with power off. Diodes and caps and the Viper itself are typical failures. Troubleshooting With Power On If you follow the suggested test procedure power up the power supply slowly, monitoring the AC current for excessive drain. See that B+ comes up. When B+ gets up to about 90 Volts the VCC circuit should come up, about 15 Volts. PFC Just above the Viper Vcc circuit is the Power Factor Correction circuit. We have two parallel circuits at work in this one. The circuits of Q104 and Q106 should come up together. Both are driven by the current buffers Q101 and Q102. When B+ comes up, the PFC circuit (we will cover later) should come alive. Troubleshooting with power off can t tell much other than bad caps and transistors. Problems in this area are usually PFC drive not coming up due to a failure elsewhere in the circuit. Troubleshooting With Power On As B+ comes all the way up, PFC should start oscillating. At the cathode of the dual diode D106 you should see about +400 Volts. If you only get +160 VDC or so, the PFC circuit is not working V Line Following D106 we have two NTC (Negative Temperature Coefficient) thermistors and the huge reservoir caps C112 and C113. These caps are a high failure rate. If the power supply is a few years old, replace them as a matter of policy. These are a high stress point in the circuit. Remember that it isn t the line current that actually drives the game. The line current charges up these caps in pulses. The game is powered by drawing current off these caps. Reservoir, right? Filled in spurts at a high volume and drained off in a constant flow at a lower current. October 2014

11 Over-Temperature Sensing Just to the right of these caps we have two resistor networks that monitor the level of the +400 Volt line and drop it down for sensing circuits. Just below that in the schematic is a thermistor that senses overtemperature conditions. The voltage across the thermistor should be about 5 Volts at room temperature (25 C). Brownout Protect Circuitry This circuit generates another Vcc line that powers CTR1, one of the control boards. It senses the B+ line for sags on the AC line. CTR1-3 is that Over-temp 5 Volt signal mentioned earlier. This feeds to a Voltage Comparator IC101 A, pin 2. This voltage is compared to the voltage on pin 3 (3.38 V). CTR1-1 should be 15 Volts and powers this circuit. Normally Q102 is on, giving that 15 V out CTR1-8. This 15 Volt level is set by ZD102 and R109. Q101 turns on when we have an over-temp condition, U101 pin 7 low, bringing CTR1-8 down to less than 1 Volt. Q101 going low also turns Q1203 on. This gives a high into IC102. IC102 (an M51957) is a delay block. A high in gives a high out of pin 6 after a delay. With a 22 µf cap, this gives about a 7.5 second delay. Normally Q106 is off. Either of the error conditions on the Gate will trigger Q106 on, bringing CTR1-8 down to about 5 Volts. So CTR1-8 at 5 Volts points to one of these error conditions. Restarting will be attempted about every seven seconds. PFC IR1150 This chip gets power from the same place as the Viper so it gets power early on. It is on the CTR1 board. Pin 7 should be +15 V (Viper Vcc) you can find this on pin 1 of CTR1. Pin 8 of the IR1150 (CTR1-4) should be oscillating. This is the Gate Drive to the Viper. If you don t get this, either the IR1150 is bad or one of the control inputs is stopping it from running. CTR1-2 is Current Sense and should be a small negative voltage. A fraction of a volt is October 2014 Page 11

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14 good. At the bench with no load it should be close to zero, maybe V. CTR1-6 is Over-voltage protect. It should be about 6 V if the 400 V line is correct. CTR1-7 is Feedback that monitors the +400 V line. It should be about 7 Volts if the 400 V line is good. CTR2 12 V PWM This is the PWM controller for the 12 Volt regulator. An L6599. This is one of the dual output types. It alternates output pulses between the two outputs, HVG (High Gate Drive) and LVG (Low Gate Drive). As long as it has Vcc and no error conditions, the outputs should be pulsing. We have all the usual pins we would expect. ISEN is the current sense input that monitors the current through the primary of the 12 volt transformer. The Disable (DIS) input stops the L6599 if it goes above 1.85 V. The Standby (STBY) input stops the L6599 if it goes below 1.25 V. The Reference Output should be 2 Volts. The Line input monitors the 400 V line and should be 2.0 Volts. 12 Volt Regulator This is a classic example of a synchronous rectifier. Instead of rectifiers, we have MOSFET transistors that get turned on at the right time instead. IC103 (a GR8387) monitors the Page 14 transformer output and controls the MOSFETs. IC302 is a LT432 Voltage Reference IC. R321 and R322 form a voltage divider that puts 2.5 Volts to the reference input of the TL432. If the 12 Volt line goes higher, the TL432 turns on triggering the optoisolator (IC301) informing the circuit of the voltage regulator to lower the voltage a bit. The other part of IC301 is in the lower left corner of this same schematic and feeds the Standby input of the L6599. So, why use MOSFETs instead of rectifiers? If you drop a volt or two across the rectifiers it is a loss of 5% to 10% in efficiency. While the MOSFETs only have a drop of a fraction of a volt and a small fraction of an ohm of resistance. You will find this design more and more on low voltage high current supplies. A 0.6 V drop in a 3.3 V supply is an 18% loss. CTR2 24 V PWM This is much the same circuit as for the 12 V side. We won t go through it again. 24 V Regulator This is about the same circuit as the 12 V side but uses regular rectifiers instead of MOSFETs. AC_SIN_In This circuit puts out a 60 Hz pulse stream to the CPU for timing and monitoring the AC line. The circuit on the left picks up the AC line. IC502 isolates the signal and creates a power supply ground referenced pulse string. A failure worth noting here if you only check for DC power to come up when testing these on the bench. This circuit will not cause the DC supplies to fail. C508 and C510 make up an AC resistor. They use the capacitive reactance as a resistance to drop the AC line voltage down, limiting it to about 10 ma. 1/(6.28*60*.2 µf) comes to about 13,000 Ohms, 1/(2?*F*C). IC503 senses the rising edge of the 12 Volt supply. A low out disables the AC_SIN_IN signal until 12 V is stable. After that, the other side of IC502 gives us those 60 Hz pulses out to the game. Failures here are the caps C508 and C510, IC502 and IC Herschel Peeler is an official publication of the October 2014

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16 Slot Tech Feature Event Slot Tech Training in Aruba This was the best training gig you can possibly imagine. I was at the Aruba Marriott and Stellaris Casino for a week of training for some of the slot techs from Aruba and nearby Curacao. Somewhere along the way, I was forced to drink rum beverages and swim in the ocean. I visited a wild donkey sanctuary and went snorkeling as well. Oh yeah, by the way, we got in some actual technical training with a lot of handson practice in soldering and component testing. My thanks to Jeffrey Croes from the Stellaris Casino for hosting the event. Apparently, I failed to inform some of the local casinos I would be in town. One week after the event, I was asked by the Alhambra Casino, When are you coming to Aruba for training? I ll be back! If you re interested in slot tech training in Aruba (or anywhere, I suppose) please contact me.-randy Fromm Page 16 October 2014

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18 Slot Tech Reference-Lamps! Thanks to Ken Belonga Attention Slot Manager! Four-Day Classes With Randy Fromm Power Supply Repair LCD Monitor Repair No previous electronics knowledge required. It s easy and fun to fix casino electronics down to the component level. Call Randy at to discuss your needs. Page 18 October 2014

19 Slot Tech Reference-SMD Markings Beginning in the early eighties, there was a trend to replace a traditional throughhole technique with the surface mounted technology (SMT) using surface mounted devices (SMD). The SMT, although intended in principle for automatic manufacturing only, expanded more and more. This trend continues because many new components are available in SMD versions only. The SMT technique opens advantages and new applications through miniaturizing of the components and increased reliability. The industry standard, unfortunately, allows that most of the SMD components do not have a clear description. Because of the tiny size of the components, they are labeled with one, two or more characters and/or a graphic SMD code. The polarity and pinouts of different components can not be identified without data sheets. October 2014 Page 19

20 Slot Tech Reference-Resistors! Thanks to Glenn Allen For schematic diagrams, manuals, service notes and more, visit the 100% free Slot Technical Department at slot-tech.com Page 20 October 2014

21 Identifying the manufacturers type number of an SMD device from the package code can be a difficult task. Unfortunately, each device code is not necessarily unique. It is possible for various manufacturers to place different devices in the same case with the same SMD code. For example, a GH SMD code in an SOT-23 case might be either a NPN transistor BC818 or a capacitancediode FMMV2104 (Zetex) or an n-channel jfet transistor MMBF5486 (Motorola) or a PNP transistor MUN2131 (Motorola) or a PNP transistor UN2117 (Panasonic) or a CMOS integrated circuit voltage detector with reset output R3131N36EA (Ricoh). Even the same manufacturer may use the same code for different devices. To identify a particular SMD device, is necessary to identify the manufacturer, package type and note the SMD code printed on the device. The identification of the manufacturer is possible only if the case is printed the manufacturer s logo but that doesn t always happen. Sometimes it is possible to determine the manufacturer with indirect tags. Many recent ON Semiconductor devices have a small superscript letter after the device code, such as SAc (this smaller letter is merely a month of manufacture code). October 2014 lnfineon devices usually have a lower case s (ATs, LOs). NXP (Philips) devices usually have a lower case p (AHp, Z1 p, pbo) or - (DQ-, -ZS) for the devices made in Hong Kong, t (tt9, Y7t) for the devices made in Malaysia, W (WT9, Y7W) for the devices made in China. Sometimes you can identify the logos of the SMD device manufacturers. The package type is another problem for the identification of SMD devices. Different manufacturers can designate identical cases by various standards. In addition, the various cases can have an identical form factor and differ only by size. This difference in size can be very small so it is not enough to just look at them. In some cases, you d need to measure the size a micrometer. Sorry, I don t make this up myself. Sometimes electronics is awesome and fun. Locating a problem can be quick and easy. Locating a replacement component can be a pain in the ass.- STM ADVERTISEMENT - Power Supply Repair Page 21

22 Subscriptions & Back Issues Why back issues of are important to own... is strictly technical. As such, the magazine's contents are not time critical. The repair information and technical data contained in past issues is just as valid today as it was the day it was published. Additionally, current and future articles more-or-less assume that readers are already familiar with what has been covered in past issues. This editorial policy assures that Slot Tech Magazine's contributing writers are not limited to "writing down" to the level of a novice technician but are free to continue to produce the most comprehensive technical articles in the gaming industry. Randy Fromm's is published monthly by: 401 W. Lexington #777 El Cajon, CA tel fax editor@slot-techs.com Subscription rates: Domestic (USA & Canada) 1 year - $ years - $ International 1 year - $ years - $ Back Issues Printed back issues are available for onlysix months from the date of publication. All single issues of Slot Tech Magazine are $10.00/ea. For further details on the contents of each issue, please refer to the website at slot-techs.com. To order, fax a PO or a note listing the issues you need. Complete archive (2001 to present) available online. Visit slot-techs.com for details. Invoice me! PO Number Company Name Contact Address Address City State/Prov. Country Zip/Postal Code Telephone Type of card: [ ] American Express [ ] Discover [ ] MasterCard [ ] 1 year subscription, domestic [ ] Visa [ ] 1 year subscription, international Account Number: [ ] 2 year subscription, domestic [ ] 2 year subscription, international Expiration Date:

23 I can help you bring down the cost of casino electronics repairs Randy Fromm OK. You asked and I listened. My new tech class eliminates obsolete CRT monitor repair and the associated monitor repair lab. In just four or five days, your slot techs can learn to repair Power Supplies, LCD Monitors, Ticket Printers, Bill Validators and more. It s easy and it s fun. - Randy Fromm tel fax

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