NWPAS Seminar 2018 - 05 - WPC Basics

we brought a very special friend and a treat because we actually got him into an orange shirt for 20 minutes oh wait a minute this is seminars an hour we got him in an orange shirt for an hour this is Victor tan Victor 10 is a WPC enthusiast to the extreme and he's going to cover WPC basics and david and i we're going to david is going to be Vanna White I am NOT Pat Sajak but we are going to interject fun things as Victor goes through things for you and with you we would also like to welcome in our new audience from geek gamer TV so this is being striped streamed live for all of the mistakes that I've already made and how many times did I say um Victor thanks doc so I think I just wanted to start by covering what the basics of a machine are clearly there's a cabinet electronics and mechanics I think when I like to look at things and I think about it how does it all work and how does it all fit together I look at when the power comes in what happens to the power from a wall where does it go how does it get distributed and how does it finally make your machine provide you with entertainment because that's ultimately what it's supposed to do so let's start with a wall there's 110 that goes in there's a transformer that changes the voltages there's a power there's some stuff in the back that deals with the electronics that there's there's a power board there's a CPU board which has brains and then there's sound and then there's display I guess from from my experience and how I was trained I like to think of it kind of like a body there's a brain there's a nervous system or the wiring that connects to all the parts and then there's the mechanics that your bones and muscles that's usually how I like to think of it so what I'm thinking about at least when I'm dealing with problems I like to break it down into electrical or mechanical those are the two basic broad categories that I like to think of and then from that I can decide which is what and where the problem is the other thing that that I think is important to me is that you need to know how things work normally before you can say hey there's a problem here so understanding how it's supposed to work will give you an idea of where it's gone wrong and how it's supposed to work is there's two categories there's electrical and mechanical I think a lot of people can see the mechanical side of it there's a bunch of metal there's some screws that hold it together or they're screws that hold it into wood and then there's the electrical side which i think is kind of daunting to a lot of people I think for electrical you can do reading on it but because electricity is often unseen it can be also dangerous so just be careful before you start working on it and some of the things on side inside and underneath on the play field are a high voltage so the I think they're about 50 volts 25 volts in my in a WPC Victor you can actually have 75 volts 75 yes sir it's not regulated so I guess that's 75 volts not under load it's 75 volts ac is what it what it's it said you have a 50 volt AC circuit combined with a 25 volt AC circuit that makes your 75 so it's not actually a true 75 and there's also high voltage for the display which you want to see very clear off that's not like a hundred volts and minus 100 volts so be born with that the later W pcs have what they call a coin door interlock switch so when you open the coin door it interrupts the 50 volts the the higher voltage side of things it still leaves the 12 and the 5 there which won't necessarily harm you if you do accidentally lean on the side rail and touch one of these 50 volts you'll probably feel it probably won't kill you you you'll say who might I think I'll be doing that again but just as a warning that the the it's there if you work on later machines if you open the door it's not there if you then go to run your tests and things don't work it's because you interrupted the 50 volts you'll need to close the door or push the switch in those are the things David what test doesn't work if you have that interlock open oh nothing much you know like retract next you and the flasher test maybe yeah maybe a couple hours so you so you're here your flash lamps will not work if the coin door is open in the interlock is not yeah so that's a very common trap people say I run the tests and things don't work again there's a certain era of machines I guess that's also another interesting thing to talk about the history of the machines and the the series of the W pcs there's several of them and they're kind of a kind' evolution and I'll go back to the series before that which is the system 11 series you'll recognize those as the alpha numerics things like whirlwind Black Knight 2000 at the end of that series Williams decided that they would shuffle up the board set and essentially switch power and and CPU into two separate boards and when they did that they created the WPC set and the first few games on that are alphanumeric funhaus right up in bar and then they went to DMD dot matrix display for those earlier ones there is no coin door in a lock so that's the warning you again when you're working on these play fields and you need to you should know which series of working on for your own safety reasons the later ones I think like Indiana Jones Star Trek the DCs series they had it so I guess that also is a good time to tell you what the different kinds of CPUs and systems there are before you go there Victor on the on the WPC DCs series such as Indiana Jones which is a prime example they had to two safety interlocks and one of them is a service switch that you can activate with the coin door open the other one you cannot and what they did is they sent you a little yellow clip to hold that closed and over the years people didn't know what that clip was and they found it in the coin box later what the hell is this and they tossed it and it actually served a function what that clip was for is to keep that switch closed for testing of the service technician those clips are not yet being manufactured Marko specialties is working I believe with pinball life with Terry at pinball life to get those remanufactured because they in almost every dcs WPC they're missing you can use just about anything you want when what works really well is a potato chip bag clip and because as soon as you close that door that clip falls off which so then you don't get stuck screwing up your door the last thing you want to do is kept keep it permanently on without realizing it because then you defeated the purpose of the switch so let's come back to the series of WP C's the first few series that they made were called the alpha numerics things like bright open bar funhouse and they quickly went to the dot matrix displays things like Terminator 2 Gilligan's Island and then they moved to Adams family and when they did that they changed the way the flippers work and this is another fundamental difference between the older system Elevens and the newer W pcs the older system Elevens had 50 volts pretty much running through the flipper calls at all times and when you press the button to to actually actuate the flipper you also are you are closing a 50 volt circuit so that's a high voltage button right there in the side of your cabinet the high voltage is interrupted by what's called a normally closed and a stroke switch so that when the flipper actuates to a certain point it opens the switch and breaks the high voltage and breaks they a short path to ground for current which provides the power stroke with WPC like Addams Family which is the first of the incarnations Williams went to a different system they went to a flipped Roenick system it's completely computer-controlled when you press the button the CPU the program recognizes that the flipper button is pressed and it then sends the commands down to the flipper coil to actually actuate the flipper it the flipper coil is still high powered but the button itself in the cabinet is low powered and then they went to they also change the end of stroke switch from a normally closed to a normally open the there's actually several advantages to this firstly there's no high voltage in the cabinet but secondly the in the old system when the end of strokes which has failed to open they would short and then when they would short they would cause the flipper call to heat up and basically constantly energize and you pretty much would blow your fuse instantly you knew when a flipper fuse was blown you don't look at the end of strokes which it's probably broken or broken off on the older systems where you have the normally closed and a stroke switch when it opens that 50 volts doesn't completely go away that 50 volt circuit goes away but then the 25 volt holding the circuit if you're still holding that button then actuates and where victor says that this changed into a computer-based setup it's actually being controlled instead of by switches you're using optos so you're breaking the opto when you push in the flipper the flipper button I should say it breaks the opto for the flip tronics one and the flip chronics two and then the CPUs Reed does differently they're not actually physical switches and auto which we should cover and get to because Williams started using them in the later series of machines quite extensively but but for the meantime so the flip Tronics with the other advantage of the flip tronic system is that the the switch is actually closed when the end of stroke is reached run we're being attacked don't rub our mango robobee like a bomb apparently we just need to check to make sure you guys are still awake so the the under strokes which is normally open and it's closed when the flipper reaches its end of stroke and this is really just a signal to the CPU saying the end of stroke has been reached the CPU itself but I think it's about 500 milliseconds of power of the high voltage power to give you the power stroke and after that it cuts the high voltage and it sends it through the the hold winding which is the lower power voltage there's a lower power winding the signal is purely to the CPU to say hey the owner stroke has been reached there is also another added advantage and this is why you really want your end of strike switches on on W pcs working is that if the ball hits the flipper hard enough it may actually cause the bat to drop and when that drops the end of strokes which will then reopen the CPU will see that and say oh look this guy was hot on the button in the the flipper should be held up the end of strokes which came down let me reanalyze the coil and it re-energizes the power stroke and it puts the flipper back up again and your flipper just goes like this and it makes a really nasty noise it's definitely important to have it but it's not critical you you won't blow fuses the game will still keep running and that's the advantage of this system it's the game still operates and if you've got a machine out in a in a Barcade you want it to keep operating to make money so after the flip tronic series Adams family is the first one it has its own flip tronic board which is incompatible with all the other flip tronic boards console tronic one and you can tell it's got the connectors are numbered 800 not 900 they went to electronic - which is the series that they use pretty much for the entire WPC series that's the the 900 labelled boards from to get away all the way through to when they ditched w piece WBC and went to w pc 95 the soundboard is separated into two eras as well for WPC there's the WPC what we call pre dcs and there's WPC dcs dcs was introduced with Indiana Jones dcs stands for digitally compressed sound essentially it's sound samples that they compress decompress and play the waveform what everyone accepts as normal today Twilight Zone I believe was supposed to be the first machine that had that but they wanted to publish it before it was ready so they went back to the pre dcs and released the machine because they got to keep the pipeline's moving it's just need a little tid bit in case you want to know some detail about the flipper coils there's two different sizes of coil stops and the pre dcs coil stops are if you buy them they're the gold ones and the post DCs ones are the black ones and they're a little bit longer so they provide less flipper travel so sometimes I've seen people swap them in and out just a little bit of the detail in case you're curious to know that that's a dividing point between the ear is what's the bad thing if you put the longer one in the one that requires the shorter one you just don't get as much travel the game does a play it's also got a mushroom and it could it could possibly mushroom your armature as well which if you mushroom the armature and/or mushroom the coil stop you may have erratic movement or sluggish movement of that flipper coil or armature and the flip is for me of the most important pot and they are the play is linked to the machine if the flippers play properly and operate properly you feel that as feedback if the slingshot doesn't fire oh no big deal you don't you didn't actually press the button to operate the machine and that's that level of feedback that is so important when you play a machine it's how you interact with it so after the dcs system they pretty much did a cost reduction combined everything into what is known as WPC 95 they took the photonic board put it on the power driver board they took the audio-visual the the soundboard and the the DMD display board and they put it onto one board and that's a reduced chip set and those are machines like attack from Mars although that's a remake or medieval madness the the later series of machines at WPC 95s but essentially the electronics the wiring everything is pretty much the same so let me move away from the back box towards the wiring down toward to the cabinet Williams had a system that they used for many many years and it persisted through to WPC there are essentially three primary bundles of wires and then in the later generations there are four bundles of wires one bundle is the power drives all the coils and the flash lamps and you'll see that it's the thicker wires another bundle of wires that are zip tied together are the lamp wires and they're always red and yellow another bundle of wires are the switch wires and they're always white and green and the fourth behind us that you'll see is the opto harness and those are almost always gray orange or black in nature and they're all zip tied together and then the bundles are all held together with clips as I run through the playfield so when you lift that thing up and you look at its like there is actually order to it the order is those four bundles with those color groups it's the the one thing to remember don't get overwhelmed by it so so now we move away from that to to to the actual play field and then again like all those those bundles of wires all reach their destination and another way I like to look at the machine is it's essentially those three things it's mechanical for the assemblies it's lamps to provide you feedback on what to shoot for or where to go and then they're switches that provides input to the CPU program that tells it what actually is going on in the playfield and that's pretty much like a video game today right the you remove the controller that's input to the game the game provides you feedback by rendering the screen I see so op dos I want to come back and cover up those there are two types of switches there are predominantly used in the machine there's a micro switch or a leaf switch it's a physical switch that two contacts actually close or in the case of a micro switch it's embedded inside the switch you can't actually see the contacts close but there's a button that physically actuates and then there are optos optos are optical switches there's a there's two ends to them there's a transmitter that transmits it in for a beam that you can't see but your camera can so you can often take a photo to see whether there's an infrared beam coming out and then there's a receiver end of the opto which sees and detects the beam and either completes a circuit or it doesn't if the if the opto sees the beam coming onto it it transmits current through when the voltage is zero and the CPU says oh the voltage is zero that's which is closed or open depending on the logic of how you want to see it but basically the switch is the beam is not interrupted is the easiest way to think of it if the beam is interrupted either by a ball or some other thing like a flipper opto interrupter for the cabinet button they do need cleaning it's true that so the the the opto will cover other optos like trough up those remind me but the opto sir used everywhere where Williams decided it was kind of a I guess a cool thing to do because sometimes I don't know why they used them there but but essentially it's there's a beam and if the beam is interrupted the CPU detects it very much like when you roll over a a wire form and the micro switch is closed it's exactly the same thing it's purely digital the the other issue with the optos is that they're powered off of the 12-volt unregulated supply which is different than the physical switches which are powered off of the 12-volt regulated supply so often you'll see people say I have a problem with my optos but all my other switches work it's because they're powered and detected differently but the CPU still sees them as one big 8x8 switch matrix as far as its concerned it treats the game logic treats them the same so the other thing that Williams did is they didn't just use the two separate optos enclosures like a transmitter and receiver they use these slot u-shape embedded optos like you'll see on Flippa boards or in in things like the twilight zone clock or the theatres of magic trunk or the indiana jones path of adventure or The Addams Family thing essentially the there is a motor that moves around and an arm and a interrupter that moves with it and when the interrupter interrupts that you slay shaped slot opto that's the same thing as a transmitter receiver except it's all-in-one this is also a subtle wiring difference between that the standalone optos go to an opto board and those opto boards are either 3 7 10 or 16 depending on however many they chose to use the U shaped slot op those are actually placed onto the switch matrix directly there is no comparator in the circuit like there is on that opto board so again you need to know what kind of is it you're dealing with and where the potential problem might be but this comes back to the thing that I started originally by saying you need to know how it works and how its wired in order to know where to go look for the problem you're used for many years in drops target banks especially threes fours and in just about any system 11 met system 9 that's any system 9 I'll forward your drop targets are mostly those u-shaped pop dos the funny thing about those u-shaped optos is that that off to itself runs about six or eight dollars and went before RadioShack clothes you used to be able to just buy a pair and you make your own and that was like a dollar but now radio checks God's there is a replacement part for those but for a long time the and don't think this applies to Twilight Zone but the other regular ones there is a replacement part vishay makes I think it's a TCS t110 3 so it sounds right if you if you need them they do remake them for a long time they were tough to find yeah so let me cover one more thing with optos trophic doze so this is an interesting area because williams when they first like I said they they really enjoy doctors like whole let's go use troughs of up toes everywhere if you look at earlier 3d CS machines like by its own hands family you'll see that there are two coils that they use to get the ball to feed into the shooter lane there's what when the ball drains it drains into the alcohol then there's a coil that kicks it over a kind of roof shaped metal structure to it with a gate that stops it from coming back and it sits in a group in that case gravity fed three or four trough placements with a trough with three or four switches and then there's another coil that they use to kick the ball out into the shooter Lane when they went to games like Indiana Jones the fur incarnation of what they call the gravity-fed trough basically the ball drains into this big metal contraption that gravity feeds it down to the bottom and then there's just a single coil that pushes the ball up and out into the into the shooter Lane as part of that big metal contraption that holds all the balls they put op those in there so the ball falls into it and it interrupts the beam the problem with these initial incarnations is they put these honking big - what 220 you I think or 271 resistors in there and those things just dissipate heat they get hot really quickly and when they do that they also melt the solder that sucked that joins them to the board and when they do that they develop cold or crack solder joints and then they don't work and then your game logic gets very confused and it says where's the ball because it can't see it and it feeds another ball into the trough it's like where's the ball oh it kicks another ball out so if you see this problem on Indiana Jones or Star Trek which are notorious for these kinds of issues that's the first place to look so Williams got a little bit smarter afterwards I guess many operators complain about this and they change the trough opto system and they remove the big 2 watt resistors and put them and basically used optos on the boards that are underneath the play field the the important thing to know is that there are two types of opto boards and they're not compatible so if you buy a seven opto board if it if it's one of the older games you need to have the 220 watt resistors on it because there's no other circuitry for that for that emitter if you buy the wrong one it won't work so again this comes back to you need to know how it works normally and what paths to get to get your machine working properly okay so that covers pretty much I'm guessing all the the basics that the wiring Victor can we touch up those a little bit more push off what recently what David and I have been seeing quite frequently is that people have a problem that they don't understand that a pinball game is a sealed system unless you have a big gaping hole that drops to the floor that pinball did not disappear and when Inka sings when it comes up and it says pinball missing people have a tendency to put a ball in and when it comes up and says pinball missing again they put another and another until it stops saying that now they have anywhere from two to three additional balls in the trough and then their complaint is it's kicking how many out into the shooter land three two and three five it's gonna keep kicking until the top has the number it expects to have in there at that point which comes right back to what Victor was saying about you have to know what it's supposed to do or supposed to look like before you can say you have a problem and I can't emphasize enough that if it says pinball missing it's in there someplace you just have my bindings hidden like you wouldn't believe not finding it can be a very bad thing because sometimes when you're in multi ball and a sling kicks there's enough gap in there that ball can jump the rubber and end up behind the sling and you know you don't normally see it until you pull that sling plastic ago there's a ball here oh well it's not missing anymore is it or sometimes they get stuck up on a non strong pop bumper where they will just sit up on the back of that that guy and and you know nobody sees it okay let's put another ball in it and eventually it comes out yeah what so this actually happened with me in it we've got a I'm a career vicar there's a there's a piece missing you it shouldn't be physically possible unless there's something missing or broken there is there is a deflector that that is supposed to be there that keeps that from happening and you he is right you are missing a piece if you look at a pin you go why the hell'd they screw that plastic there that kind of thing that they do in route they they've found it operators really well we're getting a built a ball stuck here we'll put a random often clear plastic on this post that like well why well it's to keep the ball from sitting there well a lot of times it's a it's a post that would normally go underneath the plastic and it may or may not have a rubber on it this is the term I fit people uses a ball trap basically the ball you you look around the play field and you'll wonder why that's there that's exactly the reason in testing when they develop it or out in the field as an operator has used it they put all these weird and wonderful little pieces of plastic there for that exact reason you're just missing a piece it may not be in the manual it might have been an after development one of the best things you can do when when you figure out that you are missing a piece or it could be a broken piece so you may have part of it not quite all of it one of the best things that you can do is go to I P DB org which is internet pinball data be a database most of all of the pinball machines have pictures of the entire play field and some of the pictures are good pictures you know they're 12 80s or above and they're of just the upper section or the middle section or the bottom or whatever you know and then you can compare to what was there and say oh I see it's right there you know and that that's very help but even if it did fall behind unless you had a rat it's still in the machine yes it is I'm aware that it can end up in the in the coffin portion it's not supposed to ever be able to do that so there was one thing I wanted to add as well with this bowl symbol missing there's actually there's two things when I think last year when my monster bash came someone came and grabbed me and said it's kicking out two balls and somebody had actually put six balls in there when they should have put four in and again this place to the logic there's four optos four four balls the game kicks one ball out it still sees four balls so it kicks another ball out until it sees three balls and then it says okay I'm good that's why it'll just keep multiple kicking multiples of balls out the the thing that the second thing I wanted to cover which is important is the number of balls there's a little sticker inside when you lift off the the lock bar this should be a sticker there this is install number of balls in there count the Trop switches if you have four drop switches you require four balls you have three trough switches you require three balls if you have five and an opto you require six balls unless you're Twilight Zone because it counts what's up in the gumball machine also yes stole five plus one ceramic that's that is the one in it that is the one odd ball the other thing about Twilight Zone is if you do not load the balls correctly it won't work it'll keep kicking balls around and kick it's loaded in the way it wants it yeah a little extra trick it likes two-stage balls and if it doesn't stage the balls it is not happy next year soon very very soon so the interesting the other thing I wanted to point out is that Williams went a little crazy about 93 94 with their number of balls Twilight Zone having six Indiana Jones having sex Star Trek having sex they kind of toned back on that by the time they got to W pcs games like theater of magic which only have four it's important to know that you don't put six don't assume that all the games have six and there's only a certain number that has six most of them have four and as the doc was saying check the number of optos case-in-point World Cup soccer on the right out there on the floor look at pinball missing there are only four balls in it but there were five switches for the trough so there really was a ball missing I wouldn't looked it up on IP DB and it said this game is a five ball game and yet there are only four balls in there so I got another ball I put it in its happy camper yeah and unfortunately IP DB you know they they give a pretty good description of the most games and they'll tell you how many flippers and how many drop targets how many pop bumpers and ramps and all that kind of good stuff they don't always tell you how many balls you know that's where it comes back to count the trough switches there is one other thing actually that there's thought of as well there is what they call a traffic jam switch this is switch or an opto just above the ball one and that's in case the ball kicks out the next ball is gravity fed but the ball doesn't go all the way out into the shooter Lane the game knows that the balls jammed up there it should always be not closed or open the logic that the game sees that's another one that's important to know it's there so speaking all of this actually just suddenly thought of but another important point that I really wanted to emphasize use the game tests the game has built-in Diagnostics tests for everything use them you want to test whether a switch works okay that's fine let's alligator clip the two portions of the leaf put the demeter in continuity test and close the switch okay the switch works physically but that doesn't matter because how the game sees the switch in its CPU logic is all that matters to whether the game will work properly so if you go into the switch tests and you actuate the switch and the game doesn't say the switch closed but it closes correctly with a multimeter it doesn't matter the game logic doesn't see the switch close then it's not going to work know what to expect so when you have the switch matrix pulled up and it has all these little boxes and you see dots well a dot means it's closed and so you should also be able to see that change as you're physically moving that switch if you go dot no dahhh no dahhh and that's what you're looking for and it'll let you go through each one of those switches all the way across in the tests that's the number one thing I can't emphasize enough I see people post on forums like pin side help me this isn't broke this is broken it doesn't work but that didn't run the switch test of the coil test or whatever else you have to run the tests because that's that's gonna tell you what the game logic sees and therefore what the decision is that the game logic will make and if it doesn't see the correct thing it won't make the correct decision the game won't play correctly you will not be happy hey Victor let me see your CPU for a second so in as much as testing the switch matrix David and I covered this a few years back one of the biggest problems is that when the but this is this is the actual CPU and of course there's quite a few components missing when the batteries go bad they sit right above a uln 2803 and that controls the majority of your switch matrix in conjunction with that controls all of your columns what controls your rows are over here there lm339 well the UL and 2803 sits right under the batteries in the corrosion zone and when your batteries get into the corrosion zone and David you can hold that under camera so everybody can see that a little better it'll kill that 2803 and what Williams did initially is they soldered that drip directly to the board and then they went oh people aren't changing their batteries and it's eating this 2803 and so then they socketed it in the later versions so if you have switch matrix problems nine times out of ten in a WPC it's gonna be the UL n 2803 rarely will it ever be the lm339 either one of them because there are two the other common thing that happens with the 2803 is well people are working with their machines on yes don't do that you will accidentally short a 50 volt coil to our 12 volt switch and when you do that you'll send 50 volts through that 2803 and it will not be happy and neither will you because you will be smelling burnt electronic components it will happen it's common it's missing it does I've done it everyone will do it the other reason that you want to turn the Machine off is you'll blow so you'll touch to the GI and you'll short the GI you short something it'll happen there's lots of empty open wires inside underneath that playfield turn the Machine off you'll be you'll be much happier so it's come back to the tests that was the one thing that I really wanted to emphasize again run the tests get comfortable going in the test mode playing around with it hitting switches wireless switch testers up running through the coil test running the flipper test running the lamp tests if you get comfortable with that you can pretty much use those WPC that the the WPC mom you can you can diagnose problems on WPC family members of machines because they're all the same sure the game-specific switch is there you can go look that up in the manual but the tests are all the same they all behave the same way they switch matrix is a switch matrix is switch matrix lamp matrix is lap matrix and lambda matrix they're all 8x8 there are 64 lamps whether they're all populated or not is a different story you know whether it's you know a different insert that it lights up that definitely and the same thing with the switches there's their 8x8 there may or may not be 64 there may only be 61 they may be 59 but there's 64 cake pill bowl for both and they're all the same and this holds true the system 11 and previous era machines as well but the tests are slightly different yeah so the question is have you talked about the high low tones are you talking about logic probes I guess you can teach me something I don't know anything about this I've never noticed understood that that's not as reliable as the visuals that you're gonna get and and of course when you're hearing impaired like I am and you know I mean as soon as we open the doors today I had people talking to me and I all I see is their lips moving and I'm and so it you know I'm up in their bubble going oh you know and so those tones unfortunately you know in any any kind of game room environment I can't hear those tones and even if I turn the volume all the way up I still can't hear so it's the the visual is and is a more accurate because it doesn't have to go through the sound board you know the game will give you an audio indication that the switches hit yeah and it will give you the the information of what wire colors and everything and that's usually what I do when I'm underneath the play field I've lifted up I just listen to for the sound tonight what Chris is talking about is when when you make that switch and the dot comes or when you unmake it and the dot goes away that's the tones he's talking about it makes that tone when you I know exactly about yeah I know what you're talking about so there's one more thing with this this board and what doc was saying that I really want to emphasize batteries either changed and religiously evil either change them religiously remote them and get em on you the best the best thing that you can do for those batteries is pull them throw them away and cut the battery holder off so that someone does not try and reinstall them and the reason I say cut it off is because sometimes when you d solder it the traces are so thin and weak that you'll tear up a trace that needs to be there give me chase in the start of leakage you you're just looking for trouble if you just cut it off you'll have little divots you know it's left over they're not gonna hurt anything and you'll be able to see once you get that off because it covers this whole area if you started to see discoloration you have acid damage you need to treat because taking the batteries off isn't gonna stop what's already on the board you've got to treat it and get rid of that so you don't continue to edge out the traces these particular CPUs either use a 60 to 64 or a 62 to 56 CMOS ram lives up here okay my recommendation is that again when you remove that Ram because nine times out of ten it is not socketed cut it off and then desolder the legs you have less chance of damaging remind me we need to make a video of yes doing that yes you have less chance of damaging any of the traces when you do that and the reason that we say to go to the nvram is the NVRAM has its own internal battery that's both supposedly supposed to last a hundred years or something stupid that with is BS and it will never leak acid onto your board NVRAM if you buy them in quantities like we do weaving david and i we get them for about ten dollars a piece no we don't buy them in the hundred or the thousand we buy them in tens okay if we were to buy them in singles they run about 20 bucks so 20 bucks to save a $300 board over some four dollar batteries that you've got to change twice a year minimum if you're gonna keep batteries which you should not do just like you do your smoke alarm you know when daylight savings changes change your batteries i fixed these damn things and I forget my batteries quart of course if you use when batteries you're okay because they don't have any asses of a stock thank you sir sure with you lithium batteries are gonna they work you can't be careful though but again hands will leak also yes they will leak a different composition it's gonna react with any previous acid because you've got it you're actually going from a base to an acid you're gonna get weirdness you're gonna be very careful lithium battery because alkali ins are 1.5 volt lithium aren't always unless you get some very specific battery so just be careful but even lithium's aren't a solution lithium down there a temp there are temporary fix but I'm gonna throw you out I'm gonna I'm gonna throw out a shameless plug here doesn't and the shameless plug is that if you buy an NVRAM from Rob Anthony Lachlan lit right inside he will install it for you for free here at the show and you don't have to worry about your skill set or if you really don't feel comfortable will do it it's gonna cost you fifty bucks plus the part but we're gonna do it and if we lift the trace doing it we're gonna fix it before we give it back to you yeah that's the one thing with these bullets the traces on them are really really tiny if you don't know what you're doing you may damage the board and it's even even if you know what you're doing mr. crisis yeah it's gonna happen it's 20 year old solder that's it 20 year old solder and if you had any acid corrosion it's getting under those traces and pulling it off the fiberglass it's just you described be careful that's the one thing I really want to say is don't work on the boards if you don't know what you're doing or get help alright there's plenty of people here that are willing to help you just don't overestimate your confidence level otherwise you'll end up with that jumper wires everywhere and and again don't I her estimate your confidence level either okay one of the things that we started back in 2010 when we were on the show was in Seattle was something called repair parties and the reason I started repair parties it was because we were fixing way too many games when they came in the show and they just were not standing up to being played it it wasn't bad quality games it wasn't anything on the owners it's you know the reality of the situation is a repair party they initiated they were all at my house and now that now they've gone as far south as Olympia Lacey and as far north as sedro woolley Mount Vernon and as far east over as Spokane so what a repair party is is i we i we the group is willing to teach you how to fix your equipment with the parts that you provide we're not willing to make the repair for you we are willing to teach you how to do it okay now if I if I make the repair for you you know if you show up and bring in your parts and I make the repair I'm charging you show up I will show you how to do it I will make sure that you do it correctly and it's free now instance that you show up and you don't have something and you thought you ordered everything and I have it I will loan it to you I'm not gonna sell it to you I don't sell part set that's Marco that's not my job I will loan it to you and you will replace that I have a shop so yeah he will sell you the part I won't but all I want though I don't want the money for it I want the part back the best way to hear about the repair parties is to join the WPC 2006 which is washington pin paul crazies 2006 on yahoo and/or the smack group on their on yahoo as well right yeah I'm sorry Google excuse me and that is the Seattle metro arcade collectors you can also hear about repair parties on the North West pinball show Facebook page which I believe is NW pinball I think on Facebook now and we hold we hold several repair parties throughout the year and it's it's whoever wishes to hold one in wherever and there are at least two if not more senior Tech's always present so you can get almost anything that you want answered or fixed you don't have to have something broken to attend you don't have to have something to fix to attend you can come watch and go hey that was cool or hey can I try that sure sure go right ahead you know it's what I did I just went to a party and said I want to learn and he will teach you if you want to learn people won't do your work for you it's that age-old saying I'd rather teach you to fish then give you the fish exactly and in my book learning and helping people learn it's Bri if I'm doing it for you yeah my stuff my time is worth ninety bucks an hour sorry I I I've been doing this for more than 20 years I've got a degree from Bruns and Noble I'm self-taught I've learned from others that's how you get there I dedicated a ton of time into learning I've made a lot of mistakes and I fixed a lot of my own but again it comes back because I'm sensing we're getting close to the end it comes back to you need to know how it works normally to do that you've got to learn that's not something that's gonna magically happen the truck I make is this isn't the matrix where we can magically teach you how to do jujitsu in 10 seconds it's not gonna happen Comfort comfort sorry you have to invest the time in it for yourself if you really want to learn but there's plenty of reasons we'll see it to help you absolutely happy to help just ask are there any other questions now every year it's kind of kind of fun you know we have the the command central in the middle of the hall reason we have command central hall so that we can accurately dispatch repair Tech's out faster to the corners of the hall and you know many many people come to come up to us separately and individually as we're standing there looking at each other going well what's next and they will ask us to cific things about a specific game and or who repairs this or who repairs that you know and there are certain things that I don't work on I do not work on got leaves I hate got ways don't like show you the little hub we're going on a house yeah but I know a guy that will work on and I can put the finger you know or a guy that has a safecracker I could point the finger here yeah my open invitation here is if I'm on the floor and I'm working on the machine you feel free to come and ask I'm happy to teach you I'm happy to explain to you but you have to one would [Music] chew possible that's on your matrix in the manual you'll see and ONC usually squiggly switch 24 it's always closed the reason why the Williams engineers did this is because it tells the CPU that there's 12 volts regulated going to the switch matrix it knows that the 12 volts is present if the 12 offseason president because that always cause switch is not closed then it says there's no - or false if there's no 12 volts no other switch is gonna work so it instantly can alert you on powerup hey this always cause which isn't closed it should be there is something wrong it's switched 24 it's always closed so in the twilight zone there's you you'll have the stuff in the gumball machine if it's loaded correctly and you go into test there's gonna be things they're showing closed if you'd emptied the gumball machine and we're doing the tests it's gonna be open but in the normal operation you're gonna see closed which is there and the optos are logically closed if the beam is not interrupted so if you empty the balls out of an opto ball trough those switches will register is closed on the switch matrix the Lord the CPU inverts the logic but if you're talking about pure physical switches those will stay open and the in a game with pure physical switches only switch 24 should be closed now if you get a switch that's like well that seems backwards most switches well micro switches will have three legs there's a comment and a normally open and normally closed to human wired to the wrong side switches gonna be acting backwards and so sometimes you're gonna find on those on those micro switches that David's talking about with the three legs what they've done is they will take a diode and they'll run it from the normally closed back to the common and then you're actually hooking up to the normally open so if they're using all three legs of that switch the green wide usually says to nobly open yeah the banded end goes to the common and then the white wire goes to the normally closed yeah that's usually how they wire them no it spits in a matrix every switch has got a diode it's how the does the actual matrix thing and so you need a diode in there that's trying to keep the false active of another switch at when that one actuate its separation yeah it's it separates that switch out so that you know if switch 24 goes it doesn't trigger 25 because they're daisy chained together it's how you get 64 switches out of 16 wires yeah yeah and switch 24 that's always closed is exactly that a diode that's all it is okay so we've only got a couple of minutes left and we're going to we're going to call this a wrap and I would I would definitely like to thank Victor Tan for for coming and sharing with us and even though Victor will not be an orange shirt after this because I'm sure that he's gonna race to the bathroom and change it he will be out on the floor and still be will be willing to chat with folks that are willing to learn David and I will both be here someplace way I won't be hiding anywhere but I don't never know it happens and I'd like to thank all of you for coming and thank deke gamer TV audience for joining us it's a pleasure to have everybody and that's what we have on WPC basics and the one question that most people ask though that we always forget is what does WPC stand for its williams pinball company it means nothing that's what it stands for thank you

Channel: balliswild

Views: 177

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Id: DhS_RSEULGE

Length: 55min 54sec (3354 seconds)

Published: Mon Jun 11 2018