Repairing A Rock Ola Jukebox System 3 Computer MPU.... 490,496, 3000x etc

ladies and gentlemen this is Joe's classic video games back with another rockola jukebox repair video for you today uh we're going to work on the PC board the the CPU of this rockola 496 D1 this is a really interesting one that we get from time to time it has the system 4 control unit they call it or is this system 3 system 3 control unit I'm sorry 5513 0- a so this was their like their last 45 box and so you see these from time to time it will have that cover on it if you've got the one this is not to be confused with the shorter one um which was the system to but it may be very similar once we get into it so we have the cover off of it here is the actual board that's what we're going to be working on so the problem that we're having oh if the first thing to look at of course on these is whether or not the battery has leaked and on this one it has been removed and there are some wires coming off of it it did have a remote battery holder but I think we pulled it off because the we were using it on something else or something but so there is no battery installed there's just a couple wires soldered to the place that the battery used to be um but what this one is doing is none of the inputs and none of the out puts are working so when you turn it on I've got it in off right now if you turn it on basically it just runs and runs and runs now you're going to hear a clunk here in a minute that there's something going on with the dog on the side so it all sounds good when it gets back to the home position next time you hear a big clunk okay so it's just doing this over and over again we've repaired the power supply we think it's all good but we'll check as we're going through uh but I think it's on the board so the light that is on is it says default pricing again we've got the cover off but it's this default price light is on okay which is fine it will run like that basically it's saying that the battery has been removed and you haven't went through and set up all of the uh the pricing structure on it but it it'll run like that um but it's just running Non-Stop and will not stop now on this particular one we have a problem where there's no schematics for this version that I can find online I'm sure somebody's got them I just don't have them I've had people send me schematics for the 496 but it's not quite the same thing the 496 use the system to this is the 496 -1 they use the even a new setup so it's just a little bit different so there's no home home switch at least that I can find on this machine it must be using the uh encoder wheel here on the side to find the Home switch now I've got the lid propped up on that power supply it had even worse problems but so it must be using this encoder wheel on the side to find home there is a spot whenever you get to home or near home let me see if I can get it done on this encoder wheel see the spot there where the holes stop so I believe that's how it knows that it's at home so I think I think that's working correctly that's my theory at least but the board is basically not handling it as an input it can't tell that it's at home on this particular model as well there is a mechanism board back here behind the turntable so it's a little different setup than you usually see on the older ones I think I have another one here I can show you up close maybe I got Parts everywhere we're in auke rockola fixing mood okay so here is that board that's down there okay it's the mech powerboard 55180 so there's two relays in it and uh so basically that's the sensor is talking well this has no microprocessing power so this can't really tell anything this is just going to be used to basically power the motors and stuff but basically that should send a signal that it's at home back to the PC which should interpret that and then a signal send a signal back to this board to tell it to stop it at the home position and that's not happening so I'm trying to figure out what the deal is uh we don't have schematics for it but we have schematics for similar systems so we have the schematics for the system two and we have the schematics for the system four but just not the system three the one we need right um another thing that's going on is the display is not working the display had a uh just some gibberish on it uh and I changed the uln 2803 which kind of drives the displays and once I did that uh now the display has nothing on it but I think that's correct because I think the gibberish that was on it was just because that chip that chip was shorted so we got to figure all that out as well so we're going to have to pull out the the uh logic probe and see if we can work through this thing a little bit it seems to be booted because uh where we're at here now this top button is the advance button whenever I hit that we do Advance through the different settings now if I was to hit this one for instance this turns it on free play it bounces back over to there like it should but it is not displaying that is on free play when I had the other in and I'll show you the schematics here in a minute that I've got so that we can try to figure this out but whenever I had the other uh chip in there was a couple nines on here and then it nothing would ever change so it just would kind of stay with that lit up as you revolve the um the uh basket there it should read what record you're on even though you're just cycling through it would not do that so what I think is going on is that this board cannot see any inputs and it cannot make any outputs however I just press those buttons and that's an input and they worked fine so hopefully that'll be enough Clues to help us to kind of figure out the direction to look in it's also uh lighting up the correct LEDs which is an output so that's working fine so parts of it are are booted and up and running uh but the external stuff that hooks up with the ribbon cables and things doesn't appear to be working right so that's where we're at so I'm going to look at the uh schematics and we'll look at a couple things and see if we can figure out what the problem might be and use the logic probe to test through it okay folks we're trying to figure all this out so we're on jukebox rebel.com I love this site they they basically list all of the jukeboxes in order and all of that and they also let you print a um title strips for free so we use them all the time there's also pinball rebel.com same people and they have uh they housed they house incognito's uh pinball instruction cards which we use all the time whenever we're missing the instruction cards and we need to print new ones so anyway they have a listing on here where it shows you like what order all the jukeboxes came out in so these are we're messing with rockolas these are some of my favorite ones by the way so an 82 and 83 the 488 came out which looks like that we get those all the time 84 through 86 the 490 Super Sound came out those are very popular we get those all the time 87 the uh 494 came out we've had a couple of those uh and then in ' 87 The Nostalgia 1000 came out so this was like an old school one that looked kind of like the old bubbler jukebox but that worldless are did but not quite very cool though so these ones I've worked on a lot and I know that they use the system 2 control unit this one here doesn't it uses their earlier their profit Setter unit which I guess would be considered the system one uh these ones use their system two control unit The Nostalgia 1000 I've never had one but if you look at pictures of it here on their site it also uses the uh system two board so that's the system two control board you can just tell by looking at it it's a little thinner than the system 3 or it's not quite as tall as the system 3 so system two system two system to and then they went to the 496 so this is the one I'm working on it uses what they called the system 3 well after the 496 which could play CDs they went to the 498 so that was the 496 here is 1988 1989 they made to 498 uh which could also play CDs and then we got down to the CD era and their um uh they re-released I guess that whole time time they made the Nostalgia see how it says based on 494 496 okay H they made their laser 2000 which was their first full CD box I've actually got one of these and so the laser 2000 used the system 4 control board so they abandoned that system 3 after just I think using it only in the 496 it may be in the 498 as well uh but the system 4 looks just like the system 3 here I'll show you so here's their photo of the inside of it you can see that it just doesn't have the push buttons in the middle like our system 3 board does but it's set up very similar okay so I have some schematics for the Model 3000 now the first CD one was the 2000 the 3000 was the second CD one and of course it uses a system 4 setup and so I've got this and it man it looks so similar to this system 3 it's almost the same thing but I don't have schematics for it there's no schematics for it unfortunately but you can see that they built each one off of the previous one so the two three and four are all very similar and all came out within about five years of each other [Music] so it is what it is so I don't have schematics for a 496 I can't find them anywhere I don't have schematics for a 498 I don't have schematics for a uh laser 2000 I don't have schematics for the Nostalgia 1000 but I do have schematics no no I don't have them for the 3,000 I just have this service manual for the 3,000 but look at this that I found let show you something interesting I hope you find this I hope you find this uh uh interesting okay so here is the the controller you know the the keyboard it's very similar to the ones on the 496 that keyboard looks almost identical to that okay and then if you go down oh here is the layout of the inside very similar see the the gripper arm it's just the CD setup they've made almost exactly like the record setup it's very similar so there's our control unit system four instead of system three if you go through go through they start showing you parts or I believe they do yeah so they're showing you how the boxes made up exploded diagrams etc etc and we get to Bam the mech power board have you ever seen one of these yeah you have I showed it to you just a few minutes ago so the one in the 496 is the exact same powerboard so the mechanism even though it's playing CDs uses that same board so we're system three this is system four but I'm just showing you that it it it all works pretty much the same right threes and fours are very similar and then if you go down here is the display pc pc board have you seen one of those before yeah you have it was hanging in the machine I've got three of these right so I've tried three of them and they none of them will will give me a display so it's obviously something on the on the computer all right so let me show you the schematics that I do have so this is a wiring diagram for the system 2 and it shows the schematics for the system 2 board which is laid out a little differently but basically is doing the exact same thing so I I don't have ones for these actual Parts but you know we can kind of pick through it a little bit so on these schematics they show that there is a ribbon cable on the 494 and the 490 that connects here the this is like connections on a ribbon cable and it connects up to the keyboard and display now remember we don't have any digits we don't have any numbers on on our display and I think that's a a symptom of a bigger fault that's my hope so the way that it works is it's a very simple circuit this is a different part number than the one we've got but it's very simple I've worked on the 490s before and it it's almost the exact same thing some of the signals come through and they run to a uln now the L is important apparently we'll see that here in a minute uln2803 and that's uh a bunch of transistors basically inside that thing and these lines come in and they use that to go to two connections on the edge of the board uh which connect to the light bulbs on the door to make them twinkle so the controller is the the the CPU is basically in connection with that uln2803 to make to make lights blink on the door there is another one here on the board the the keyboard the display board uh to light up this so you've got three LEDs on a 490 your selection now playing and add coins and then you've got two light bulbs a bonus light and a reset light okay well on our little board here is that uln 2803 I've removed it I'll show you why here in a minute uh and if you follow the traces it does appear that that controls this light that light and those two LEDs so three LEDs and a little little light bulb why they didn't do four I don't know but whatever okay now you can see an unpopulated chip up here right well that would have been the other one that you would use this connector to connect to the door to to make the lights blink on the door and if you look at the back you can see that that chip would just connect directly out to uh the harness that goes to the lights on the door so that's what we're looking at here right but since this particular model they didn't do that see the little dotted lines around it uh they didn't put the chip on the board so what I'm saying is this board that we have schematics for is very similar to this board just slightly different and one of the reasons is because it doesn't have push buttons on it so on this board there were little buttons that you press and that's how you talk to the computer whenever you're selecting a song well this one doesn't have it because they had a little jumper here uh so that they could use uh membrane buttons on the front of the of the keyboard uh which have all failed but we've got a solution for that so um that's one of the differences between this board and the board that we have so that's how this works so again I'm just showing you that it's it's all very similar the digit and segment lines come in here and that's what what runs the eight uh displays okay so here we have our same eight displays and I have looked at the pin out and it's pretty much best I can tell the same so the lines running to these look there's nothing on the actual keyboard I mean nothing on this actual board that make these displays work it's all controlled by the CPU through that ribbon cable okay so uh lines 9 through 16 pretty much 9 through 17 run the segments and then uh 18 through 24 25 run all of the digits so that what the digits do is they enable the actual display and then the segments are strobed in and they tell it you know what segments to light to make the letters all right my whole point point being there can't really be much wrong with this unless the actual displays are out there's one chip uln 2803 if I put it in the actual CPU on all three displays that I have it makes gibberish come up um and then if I put a brand new uln 2803 in uh nothing comes up it's just completely dead so I think what's going on is that one chip is shorted and it's just shorting stuff on uh and whenever you change whenever it scans through and everything none of that ever changes so I think it's just a screwed up chip and then I'm I'm putting brand new ones in I've tried like three different ones uh as well as some used ones that I have that are different makes and stuff and uh no matter what I do I can't get anything on the display so that's where we're at so I'm trying to systematically work through this and figure out where our problem must be so where do these signals come from this schematic originally was like a big huge piece of paper and the scan that I've got they've brok it down into little pieces of of the page and it just are laid out horribly so it's really you got to jump around to see where everything is but uh there are our digits and segments 15 16 17 are segments and so if you come down here this area here this chip handles the segments okay and if you come over here this chip handles the digits so since we don't have anything on I was thinking probably digits right but then we run into another interesting problem now keep in mind none of the inputs work either so I don't think this is the this is the issue I think there's more going on this is just what I've tried so far that says udn 2803 best I can tell that doesn't even exist so I think that's supposed to be uln2803 I've searched and searched and searched there's no such thing as a udn 2803 as far as I can tell now over here you have udn 6118 that's correct I think the difference is one is PNP and one's npn I think I believe but they don't make a udn 2803 so I think that's a typo and it's on about five different sets of schematics that I've got uh for the system 2 stuff so I think it's just they screwed it up it's a udn and you can see up here that on the the keyboard they were saying uln 2803 so I think that's just I think that's just a mess up and if you look at where the power comes in see the 12 volts there it comes in on pin 10 that's where it comes in on a uln so I don't know folks on the board whenever I took the cover off it had a uln2803 in there which I assume was from the factory but who knows right and then here is what what uh controls the segment we have a udn 2983 installed in ours you can change the jumpers and put in a udn 6118 which I've got some of those also the ls 273 are the buffers that feed it I've swapped those no dice but if you look it says E5 and F5 that's because these are the chips on the system two we're messing with system 3 it's a different thing so what I want to do is kind of track this down and see if I can figure out what's common to all this maybe there's a voltage missing or something or the ground's missing and so that's why the lights the LEDs won't work and the buttons won't work I don't know okay so I'm going to look through it a little bit and see what I can figure out um this is the two board set uh and system four system three and system four are basically one square board so it's they're laid out very similarly now um I have little cheat sheet for the system 4 stuff if I haven't lost you yet look at this bad boy that I was able to find system 4 control computer testing procedure say what say huh start here remove cover and test inspect the battery must be clean and measure 3.6 voltage DC minimum replace of necessary so I wonder if the whole problem is the thing just won't work work without a battery I don't know why that would be but maybe I know the system twos work without a battery but maybe system 3 won't I don't know so maybe we try that first clean Edge connectors with fiberglass eraser connect computer to jukebox and apply power okay what happens did the display go through this nope does display go through that nope does display go through that nope uh does the display show garbage see RS can't even do like a and stuff it's not going to be able to do that but it should show something right does the display show garbage it did with that one chip but I think the chip was bad so I think we're over here display is blank I think that's where we're at does the mechanism home 15 to 20 seconds after power up uh it doesn't they're saying that might the clock might be missing right but I don't think that's our problem either I think we've got a problem on the inputs and outputs I don't think there's a problem with the with the program running or else you wouldn't be able to use the advance button so we're going to say that yes it does just to look at this and then so it says check display drivers driver ic's U13 and u26 and Associated circuitry so that's kind of where I've been but um there's another spot down here with the clock if the clock is not present check the Crystal and clock circuit if the clock is present check u18 pin 26 if flow check power up reset circuit c42 and 143 have a history of failure okay you can also go over here put up a credit make selection you can check to see what happens um mechan ISM fails to move or always runs that's kind of what ours is doing too right so maybe it's something with that check u36 q6 Q7 and the Run line all right so I got a little bit of stuff to help me get my mind around it that's what I'm looking at and I'll see what I can figure out and then I'll film it you know really just looking at the board now I'm not you know an expert at this stuff but I can't fault rockola for anything that they did here I mean this is a nicely made board um they made it you know where they can expand it a little bit um and maybe it really is just the the system two boards combined on the one board but let's look it over so you got a battery up here that I caught before it started leaking I've already I already messed with this because I had another one and I figured out this board was bad um probably a year ago the whole thing runs off of z80 that's good right we've got a couple ROMs here we've got a uh RAM a 2816 Ram no I'm sorry a 6116 Ram 2816 I guess that's a ram too I guess one's for the the uh backup or the the the system um one is the store customer uh bookkeeping and stuff like that and customer selections and stuff and one is just to run everything I guess a 714 a 74 159 which I don't know maybe that's how they're running these LEDs um z80 CTC H isn't that something where it it's like a Pia or something that might be our problem Maybe um got a little dip switch setup down here okay and so then all of your inputs and outputs come in over here this is the displays uh and they have socketed almost every chip on it which really helps you know um so this is our uln 2803 here already swapped it that didn't fix anything here are our 74 LS 273 is that I guess buffer it swap them I didn't change anything I swapped these two that didn't change anything I don't have a udn 2983 but I do have a six the other one the 6118 or whatever it was I've got that and On The Other Board the system to where it said you can use either one and then you do jumpers a or jumper B well it looks like they've got the same thing here but they' call it jumper one and two here and you know depending on which way you have the jumper you're connecting 12 to one pin and ground to the other or ground to one pin and 12 to the other uh so it looks like we can swap that if we need to and just everything's socketed the buttons are nice nice quality buttons so I mean it's a cool board there's really their earlier stuff like the profit Setter boards ran off 9 6 volts which kind of sucks you know but this is all common stuff this is a good board but they abandoned it almost immediately and went to the system 4 my my uh thought is the system 4 I'm sure is just a slightly modified version of this so I'm going to put the battery uh holder back on it get make sure 3.6 volts is on it and then we'll go from there I also went through and replaced some of the capacitors but I had already done that before so I guess that's not going to be the problem I've already been trying to get this thing thing working in the past but uh we'll do the battery thing first and then I'll pop it back in and make sure it's nothing as simple as that this the old school way I do the batteries just get a four battery holder and put a diode a blocking diode as the last battery connect you know with the line connected to the red going out um and then three batteries is 4.5 volts the diode drops it a little bit and it makes it where the board can't try to charge them I don't think the board is trying to charge them but just in case so it's going to drop the voltage down to like 4.2 or something of course usually all the batteries are high so it'll probably be higher than that we'll find out here in a second won't we I bought these they have a little switch on them which is about useless I sold one I put one in a pinball and when the guy got it home it had knocked the damn thing on off and it made it forget all of its settings so he had to go all threw it and reset everything back up again so I don't really like that but uh let's see if we've got three at least 3.6 volts Chopstick time 4.6 that's even better okay so with the battery installed of course it's doing the exact same thing I figured it would but just just make sure since we're following along with their uh their uh troubleshooting guide okay so looking on the schematics of this of the the series 2 computer or whatever it's called uh we have this chip a 74 LS1 138 and it's being used to control send all these control lines out DX 770 777 774 771 772 775 776 uh so it sends all these lines out and they come up and they control the buffers that are used to turn on the displays and then uh they're also used here where the buttons are used on the keyboard right so I think that might be next I guess I'm just going to swap it because it's so easy it's in a socket but I'd kind of eventually I want to get the logic Probe on it and see if I can just see if everything's dead or or what's going on but I think that might be an easy one to to well it'd be better to just check the signals wouldn't it so I need to it's E4 on the system too but on ours it's a um U we're just going to have to look for a LS 138 that seems like it connects to the area that's doing that that has the udns which are the obvious uh display chips so let me see if I can find a place to get 5 volts in ground and we'll try to put a logic probe on it and just see if anything's happening on these chips there's an initializing light here that comes on and then it goes over to operating and you know normal operation or whatever it says um after about four or five seconds so it's up and doing something and if you hit the advance button like I said it advances through it which tells me it's running code right even though the voltage is low 4.65 but if you check you know you're getting plenty of action on the processor so I figured well let me just start looking through some of the signals and see if I can track it down and find something that ain't acting right so again without the schematics we're kind of you know just guessing here but these are fairly similar uh but if you look they run off 12 volts these udn chips but we could check the inputs to them couldn't we so udn 2803 and the 6118 or the 2983 1 through eight uh are the inputs two and seven looks suspicious but we'll see it looks like that's how it is 1 through eight are the inputs and they're coming from from the 2 73s uh right beside them so that are the these are our udns and if we check one through eight low low low [Music] low well that would explain why we don't have anything on there our segment is completely all they're all dead now that one a couple of them are dead but that's the digit one so if it was telling it not to turn on a couple digits that might be correct I don't know right so let's move back from that so I'm thinking this one might actually be working uh but this one isn't and I've swapped that chip and again this is the one it says udn which I don't think exists so let's move back to the 273 and see if it's getting what it's supposed to get so uh I'm curious about since it's completely dead and I've swapped this chip I'm curious about its enable line so one and 11 now you can see that the data lines the not data lines the inverted data lines coming in are the same uh for both chips are just in different spots so uh pins 1 and 11 though are interesting so both of these are 273 but you can kind of tell that this one is directly connected and this one is directly connected okay pin one is high pin one is high pin one is high pin one is high okay this one pin 11 this is the one we think is working pin 11 Pin 11 Low hm so the segment one is low and that's why it's not outputting to that huh interesting so this one ain't doing nothing this one is right and the difference seems to be this pin 11 which is coming from it's DX uh 777 which is pin 15 of a LS1 138 around there somewhere I can't go by these letters though cuz it's the wrong board but there should be an LS 138 that seems to be driving all of those uh with inputs on one two three and maybe 456 are those are the inputs let's see if anything's happening on 1 two 3 4 5 six of an LS1 138 somewhere near there okay so that is a 74 LS 138 and that is a 74 LS 138 and I can see a few lines running from here down here um so maybe that's it let's see what the inputs are like so is low probably supposed to be see I don't know what they're supposed to be bo didn't that one sounds so much healthier okay so this one has something on six okay so uh yeah maybe we just swap those what do you think what do you think I think I just swapped that 74 LS 138 and see what that does anything so here's the one we're looking at that controls the displays and stuff and buttons inputs and the other one is over here by the uh the z80 and the z80 CTC whatever that is uh and one of the lines goes down and controls the mech like the the home line that we're talking about and the Run line which tells us to turn on and all of that so I don't know maybe they're both bad maybe I'll get lucky and they're both bad but let's try swapping one of them and see if it just changes anything I have swapped it let's turn it on you can see it do its boot thing if I can reach the power switch that's more like it uh it's missing one of the segments but it's at least doing something let's see if I can put it on I know how to put it on free play even without the cover on it yeah look now we're getting now we're getting somewhere if you go over to here and then you hit this one that puts it on free play or I thought it would okay I don't think that though would have anything to do with the Mech but at least now we can kind of see something happening man we're making progress so this is probably just going to keep spinning and spinning oh there we go see it is actually it's counting the uh records as it goes so it knows where it's at so it must be seeing that sensor it's just continuing to run for whatever reason but that's definite progress Okay so uh we're missing one of the segments though that could just be well that might be a loose ribbon cable or it might be uh we might still have problems with that same little area with that same IC let's see if we can figure that out um so I guess that has made those inputs different now I don't shock myself to death one two three four five six is low 7 eight okay so input six is low coming out of the 273 okay so it's segment C of each one right so it's segment C which is pin 12 I checked the entire wrong one this one is the digits this one is the segments okay because pin 13 uh is output pin 15 off of that which may be input pin four if those directly line up so let me see uh the one through eight on that one okay so on this chip pin two and three are low they're not pulsing which would mess up output pins 16 and 17 which would be wiring pins 11 and 12 which uh let's see what it is on the other screen 12 is segment C which is missing and 11 is the decimal people we don't need no decimal point why would we need a decimal you don't have to have a decimal point it's not even hooked up on the that's not going to even have anything going to it I don't think come on now that's completely not necessary five 6 7 8 n h trying to see if it's actually hooked up five six seven 8 it is hooked up I don't know why you would need a decimal point on a Juke B come come on now we don't need that all right so we need to see why that 273 is not outputting a couple of them we'll see if there's an input to it okay so both of the 2 73s they get d0 through D7 inputs but it's it's actually not d0 through D7 you know because it has the line over it in the absence of D30 through D7 and if you look over here see it says inverted data so this is the data bus here and then the lines run from there through a couple 74 LS o4s and and it inverts it to make the inverted data bus which is what's used for all of this I have no clue why but I'm sure there's a good reason it must have been because those chips wanted a certain way like the back street boys tell me why okay so we're going to um we're going to have to test the inputs actually that's what we need to do so 3 4 7 8 13 14 17 18 3 4 7 8 13 14 17 18 all right now you guys remember the numbers right so it was uh so this is the one that's working 3 4 7 8 13 14's missing 17 18 all right 14's missing all right so do in the next one I wrote that down three four 7 8 13 14 17's missing oh my on the wrong one 13 14 17's missing 18 actually 17's low okay so on this one 14 is missing which is not D4 and on this one 17 is missing which is not D4 hm so our our inverted D4 is missing now it is right here it comes through what on this is F4 but there's an so there's two of them that do it so there's F4 and H6 are both LS o4s but again wrong schematics same design different schematics so I need to find some LS o4s 04s and then find one of them that three works and four doesn't or whatever I need to find the one I guess that pin four is low on okay three and four on a ls04 all right so both of these are 74 LS o4s three and four so the input and output's working and on this one there we go three is pulsing the input's pulsing the output is stuck low so let's try replacing that chip that has brought back our missing segment that is so cool all right well we've still got a long ways to go I think let's put it back work and revolve yeah that's pretty [Music] sweet um I wasn't able earlier to get it to do the free play thing yeah okay but there it shows you there that the um display is working oh we do have a decimal point when it wants it if I could ever get the the uh free play to work it would say 99 wouldn't that be great yeah I can't get it on free play right now but that's neither here nor there we got bigger bigger problems than that okay so uh I've still got to get the buttons back in it and uh test them now let me show you that real quick and then we'll call it a night this been a 10hour video this is what the original control panel looks like and what they did was they made they used a membrane similar to how the dart boards work which is bad news long term because what happens is you can get all kinds of problems you can get just dirt inside of there where the thing or corrosion where the things won't connect anymore or you can get uh uh basically if it breaks you're done you know if any of these traces snap you're done okay so it's a real problem on a lot of these so what are we going to do I don't know we could just drill holes in it and put a bunch of buttons so we took one that was in decent shape drilled holes in it and then just put regular buttons in it and then made our own little connector so stay tuned and you'll see more of that so I hope you enjoyed it but this about all I can do in one video it's been like 4 hours I think um so leave your comments below let us know what you think so far now that I've got the display working it'll be a little easier to diagnose now I mean the the power is still low I don't you know I guess maybe it can just run on 4.65 seems low to me but maybe uh maybe now we can uh oh I wonder if one of those chips being bad was lowering the voltage let me check the voltage real quick n it's still about the same it's 4.76 on this side of the diode so so I don't know something still kind of bringing it down I think uh but we'll figure it out so or hopefully we'll figure it out I guess if if it still works we won't need to figure it out but that's where we're at so far so I hope you enjoyed it so far next time we'll figure out why we're having the problem where it won't stop at home position and then we'll see if we can get it to play um but yeah like I was saying the design of this board is pretty good in my opinion maybe some of you folks that really know your PC design your PCB design can tell me down below if you see any obvious flaws um I'm not really sure I like what they're doing with 5.7 to 5 volt especially since it's not working right but other than that it's very well laid out even though I don't have the schematics I can use similar schematics and still figure it out because it's pretty well laid out uh it all kind of makes sense and that's that so you we're pecking through it even without the schematics and if one of you has the schema schematics hook a brother up email them to me the link is down below I need the 496 schematics or the laser uh well yeah the laser 2000 schematics would work because it's so similar uh I don't have the the the uh system 4 schematics or the system 3 schematics and if you think you've got the 496 ones open up the file and look at it first because the ones that are labeled 496 are not 496 for whatever reason there's a bunch floating on the net but they're not the right ones uh so I appreciate everybody that's been watching make sure to give us a thumbs up hey you want to know how you can help our Channel you can send me those schematics you could do that uh and also uh if you're going to buy anything on Amazon use our link to go to Amazon don't type amazon.com don't do it not even once use our link down below and just by clicking the link you don't have to sign up for nothing it doesn't raise your prices it's just this is an advertising ment for Amazon you know to them uh and so it pays me money but just because you click the link because I sent you to Amazon so we appreciate that uh it gives us a little percentage of whatever you buy so a lot of people have been doing that especially here around the holidays it's been uh pretty cool so uh thank you for that and I hope you enjoyed the video last but not least don't forget to check out my brother Donnie my brother has his own channel here on YouTube we're always working on jukeboxes arcade games pinball machines look at all this stuff we got I can't even get into it look at all the we got stuff everywhere I need to call Shango about this one I I can't do that and I'm not good enough for that we'll figure it out eventually though uh but uh we do videos on all this stuff Donnie does videos on Old buildings old cars old trucks uh we're he and I are about to start a whole series on rehabilitating a mobile home and before you think that won't happen we already did one we got an entire playlist over there where we fixed up a mobile home so uh check that out if you haven't already and we will see you on the next video so I'll do another one on this one where we're wrapping it up and figuring out the rest of it and getting it going I've been meaning for a long time to kind of delve into one of these CPUs just to figure out how it ticks where I'd be a little more comfortable working on them so I'm happy to see that I've at least made it just a little bit of minor progress even if it was just uh figuring out why the displays won't work so uh give us a thumbs up an odd number of times and we'll see you on the next video