Repairing The 1980 Williams BLACK KNIGHT Pinball Machine SPEECH Board , Displays, Driver Board, Etc.

[@paulclarke7571]

I played the hell out of Black Knight as a kid. It was my dream come true to buy one 6 years ago. Still play 3 games a night before bed. For me it is like a time machine for me. When I play I am 16, thin, fit and in the prime of my youth....

[@LyonsArcade]

It's a great game, I'm glad you found one! Thank you for watching Paul!

[@eddievanbasten1751]

Watching from Wales 🏴󠁧󠁢󠁷󠁬󠁳󠁿.

[@naytch2003]

Bore da😜

[@LyonsArcade]

Thank you Eddie!

[@AgentHeX_0007]

Watching from Wales also 😉

[@jmonti-1811]

Random internet guy here that KZbin suggested I might enjoy your video. Hell yes I enjoyed this video. Thank you for going over the wiring diagrams and explaining your trouble shooting routes. Keep up the great content. Your fan in 29707.

[@LyonsArcade]

Thanks Jmonti, I appreciate you watching, see you on the next video!

[@tjsogmc]

Oh, wow. Just wow. Such memories just came flooding back at the sound of that game! I can remember the sounds and smell of the video arcade where I would spend the weekend with my friends playing Black Knight (our favorite pinball game). Our favorite arcade had a Putt-Putt mini-golf nearby, a mall, couple of fast food places, record stores, and 3 movie theaters all right there in the ring road - a great way to spend a Saturday afternoon. We would either get dropped off by one of our parents (those were the days!) or one of us would drive if we were old enough to have a license and a borrowed car. I can smell the pizza from the snack bar and the cigarette smoke from the area with the pool tables like it's happening now. But the world has moved on and it's all gone now. The mall is dead, the arcade and movie theaters have long closed down and rebuilt as a Walmart. Even my friends aren't here anymore, I'm the last one of our little group. It's amazing what memories an old pin ball machine can dig up. And to channel a little Janice Joplin: I would trade all my tomorrows for a single yesterday. I hate to be getting all nostalgic, but those were the best of times for me. Thanks for sharing this video and for all the work you do in restoring these machines.

[@asdfasdfasdfasdeff]

What a story. Life is fleeting and fragile. Thanks for sharing-

[@LyonsArcade]

Thank you for watching Red Scorpion and for sharing your memories, that's what we're trying to do with our channel, get people to remember these great games and the entertainment they brought. I'm going to give you the final piece of the puzzle to think about though.... You realize the day will come that you and I are gone, but the Black Knight will still be here, right? Mindblowing!

[@tjsogmc]

@@LyonsArcade We can hope that the games will live on for a very long time, but who knows? They are meaningful to our generation primarily through nostalgia - there is no way to know if the youngsters will preserve the games after we are gone - they don't have the good memories associated with them. To the young generation these games are "lame". I don't even know where there is a pinball machine in my local area anymore - I haven't seen one in my regular daily travels in ages. I think for me, I would consider it the Holy Grail if I could lay my hands on a restorable Black Knight or KISS machine. :) Man, Black Knight was awesome with the two level playing field, the "magna-save" and the 3 ball capture. I probably could have bought one with as much money as I put into playing it! I've got my eyes out, make no mistake... But there is hope yet. Just last night my 14 yo son was at his weekly game night at the local coffee shop and everybody was bored. So I broke out my old "Star Fleet Battles". Yes, that one. A survivor from the 80's - pencil and paper and everything. And you know what? The kids loved it! They literally had never seen anything like it before where you could play a game and be flexible on the rules and have to AGREE with other players on certain things - and they don't need internet, apps, permissions, subscriptions, or anything. They absolutely ate it up.

[@heman1303]

What about the new pinball machines?for example the new Black Knight etc....

[@tjsogmc]

@heman1303 probably the new ones are OK. I don't think it would be the same playing it without my friends

[@pabloluchi3595]

You explained that sound issue so well.. I enjoyed listening and learning. How a little jumper can make the sound goes to another part of the machine. Thank you Ron! definitively a Pinball Machine's Wizard! Regards.

[@LyonsArcade]

Thank you Pablo, i'm glad you enjoyed it, we try to make it interesting!

[@DeadKoby]

I find this encouraging. I work with electronics too........and sometimes I get really frustrated and take breaks for too long.......before I regroup.

[@LyonsArcade]

Sometimes if you let them sit they make more sense and you find the problem when you come back to it!

[@86FxBdyCpe]

This channel is awesome, I wish I lived closer.

[@LyonsArcade]

Thank you Steve, we appreciate you watching man!

[@WildkatPhoto]

I put a LOT of quarters into Black Knight. Awesome to see one go from junk to treasure.

[@djlamar2]

Can't wait to hear it talk. Love those kind of pinball machines

[@LyonsArcade]

Yeah they're pretty cool, they sound great! Thanks for watching djlamar2!

[@baelevatorsmore728]

Always good to see another pinball repair video. You always have to make sure you wire things right. One little wire can cause so much trouble. Lol “I didn’t do it” either. We probably alerted some authorities yesterday when we had the college fire alarm trigger. Very interesting day indeed.

[@LyonsArcade]

It happens, that's what the alarms are for to make sure everything's alright.... thanks for watching BA Elevators!

[@baelevatorsmore728]

@Joe’s Classic Video Games Not a problem! Electronics are what I’m into.

[@finstersrc30]

"I'm going to enjoy the next 40 Years" Love it.

[@brentfarvors192]

Until the next person forgets to color code the connectors, and does the same thing when taking it apart; Putting it back together wrong...

[@gorillaau]

​@@brentfarvors192 perhaps a dab of paint on the connector and the same dab of paint on the board might be a good idea. It's a poor design all the same, people.

[@SpearM3064]

Now that the boards have been fixed, it's in really good shape other than a few switches. Well, the backglass not so much, but the playfields and lights are surprisingly intact (although I suppose that's proof that it's been serviced at some point). I guess I'm just used to seeing pinball machines on this channel with a whole bunch of bulbs burned out. On this one, I saw two. I'd say you're over the biggest hurdle. Man, those sound effects bring back a lot of nostalgic feelings.

[@LyonsArcade]

We're almost there, tomorrow we'll play it! Thanks for watching SpearM75503!

[@derofromdown-under2832]

Excellent analysis, diagnosis and repair... WELL DONE!!! 10/10

[@edwardhewer8530]

Seeing the schematics printed out, these should be available for everything ever made. Now I understand the right to repair peeps. This pinball game was mesmerising when it came out. It would be played from arcade opening to arcade closing non stop. Hearing the sounds made me tear up with joy all the good memories. Williams made the finest stuff back then including their video games.

[@LyonsArcade]

Yeah the right to repair guys have a good point. Thank you for watching Edward!

[@lovethebearded9506]

You Sir are a Pinball Repair Wizard!

[@LyonsArcade]

Thank you Love The Bearded that's nice of you to say!

[@andrewthecelt3794]

Tis merely a flesh wound! HAVE AT YOU!!! The Black Knight always triumphs!

[@LyonsArcade]

He's a tough SOB! Thanks for watching Andrew!

[@wolfweb]

Another quality how-to and interesting video from Ron and Joes Classic Video Games.

[@LyonsArcade]

Thank you Wolf, we're glad you enjoyed it!

[@carloslewis8448]

You are good at troubleshooting these machines... it's impressive

[@LyonsArcade]

Thank you Carlos that's very nice of you to say!

[@wmspins]

That s a really clean Black knight. Good original survivor for sure!

[@LyonsArcade]

He said he had done a ton of work cleaning it, it looked great! Thanks for watching wmspins!

[@midnitepagan9118]

It was the speech that got me into spending way too much on that pinball. I remember walking past this new pinball in my local arcade and all the sudden, The pinny started talking to me. That was pretty amazing for the time(early 80s}. There weren't many Arcade/pinball machines that had good speech capabilities.

[@LyonsArcade]

I can imagine that it was mind blowing and they had gotten to the point where they knew to make it taunt you, so smart of the designers :) Thank you for watching Midnite Pagan!

[@SpearM3064]

@@LyonsArcade At least it has a bigger vocabulary than Gorgar, but that's not saying much. Gorgar had a vocabulary of just 7 words, Black Knight had 10. They made slightly less than 14,000 _Black Knight_ games... but it got two sequels! Black Knight 2000 (despite the name, it was released in 1989) and Black Knight: Sword of Rage, which was released just two years ago. I played BK2000 a few times. I really wish I had the chance to do a side-by-side comparison of all three.

[@marinkagreen9415]

It has been a long road, but well worth the effort, thanks for sharing it with us.

[@LyonsArcade]

Thank you Marinka, we appreciate you hanging out with us today :)

[@kbe2176]

This and then later Black Rose were my favourite pinball machines

[@LyonsArcade]

I haven't had a Black Rose yet!

[@grandpaseed]

I love the black knight game ,fond memories of him challenging all comers from a dark back corners , always made me smile

[@cyberhornthedragon]

Always loved the black knight machines thank you for bringing back a smile

[@LyonsArcade]

Very cool Cyberhorn glad you liked it!

[@macdaddyns]

Such a cool time in pinball history. All I played was Bally until I visited a large arcade in the city. I thought Black Night looked cool, then I played it... Magic ensued, I was mesmerized at the speech and the medieval sounds coming from this great game. Thanks for saving this one. What a load of issues, as well congrats on the excellent trouble shooting and knowledge sharing.

[@nightwolf1966]

The Black Knight! The greatest Pinball game of all time

[@LyonsArcade]

It's pretty cool! Thank you Candor's Path!

[@andrewsidles7672]

Totally love your show Joe

[@LyonsArcade]

Thank you Andrew!

[@greenlantern1123]

You are the man . Priceless knowledge you share in every video . Thank you 🙏

[@LyonsArcade]

Thank you greenlantern1123 we appreciate you watching!

[@Tranarpnorra]

Nice work on this old classic Ron! Played it to death in a small diner in a small village back in the early 80's. I think Black Knight has one of the coolest attract modes of any pinball. A few hairs on my arms went "boinggggg" when you turned off the light in the room. =) Aaaand, not to mention that new fangled 'Magna save' function. Saved my a$$ a whole lotta times.

[@LyonsArcade]

Yeah it's crazy how that works, memories flooding back in :) Thanks for watching Matthias!

[@Tranarpnorra]

​@@LyonsArcade It's a pleasure to watch your videos. Being a tech nerd with severe arcade dementia and nostalgia. =) Just now I'm watching the follow up video: "The Black Knight Rides Again" (Hey, one heck of a film title there, haha)

[@chemskiesukvol.2covid19isbs]

1980 was the only time I went abroad and it was to the United States of America, started in New York and went to Washington DC then to Toronto Canada via the Niagara falls then back again to New York playing arcade games everywhere I went. Was a great time Thank you Americans 👍

[@LyonsArcade]

Thank you for coming, come again soon :) Thanks for watching chemskies UK vol.2 covid19 is bs :)

[@michaelvanvleet998]

Nice work!

[@LyonsArcade]

Thank you Michael!

[@simondempsey1]

Excellant video, well explaned as usual Ron. Brinngs back memories.

[@LyonsArcade]

Thank you Simon, glad you liked it!

[@davidgrimes1854]

Thanks Ron for a great video I think this one of greatest machines ever made, love the great work you do to bring it back to life again.

[@LyonsArcade]

Thank you David, I appreciate you watching us man!

[@RickWright66]

So interested in this series! My town of Middleboro, MA had a small arcade. Three pinball machines...Black Knight, Pharoah, and 8 Ball Deluxe! Black Knight was always down for repairs! Love this channel! Defender, Robotron, and Asteroids were my go to games! Love the channel sir... fantastic learning experience and the nostalgia ... love it!

[@LyonsArcade]

Thank you for watching Rick, we appreciate it!

[@heman1303]

Well expained!! Got one BK....waiting for years to get to work again.....

[@scottgav2796]

Brilliant walkthrough on sound troubleshooting. only a few years ago i had an opportunity to buy a partially working Black Knight, a great memory from my childhood. $1800. I only wish I had seen your videos prior. too worried I could do nothing, even coming from a Computer Science background. Ron, you should be teaching Pinball Repair Master Classes!

[@LyonsArcade]

I AM TEACHING PINBALL REPAIR MASTER CLASSES, you just took one! Thank you for watching Scott!

[@EsotericArctos]

I like the way they used orange LED's in the display kit to mimic the look of the original plasma display. I have seen some kits that use red or green and they don't look as good. :) The rectifier giving + and - 12V is working as a centre tapped full wave rectified (not full bridge) supply. Half the bridge (two diodes) gives +12 with refence to the centre tap and the other two diodes giving neg 12 with reference to the centre tap. 24V across the bridge :).

[@LyonsArcade]

Thank you Brendan I didn't know full wave and a full bridge were different, that makes sense. See you on the next one!

[@pauz2175]

Great vid Ron!

[@LyonsArcade]

Thank you Pauz!

[@jaxson3887]

Long live the Black Knight!

[@LyonsArcade]

He rides again! Thanks for watching Jaxson!

[@bperkins]

Nice work getting through that board. Always a great video and content. I enjoy all of them. Thanks!

[@LyonsArcade]

Thank you Bob that's very nice of you to say!

[@MRNBricks]

18:44. You turn out the lights, my screen goes dark, and I see the reflection of myself in my phone screen sitting on the toilet. My morning is ruined. 😂

[@LyonsArcade]

GOTCHA!!!!! Thanks for watching MRN Bricks!

[@dherman0001]

This game was actually intimidating.

[@LyonsArcade]

Yeah, it's pretty aggressive! Thank you for watching!

[@patrickfivetrick9202]

You did it again Ron! Well done, as always!!

[@LyonsArcade]

Thank you Patrick, we try!

[@TomJones-wi4nh]

Kinda neat to hear sound effects from the William’s classic coin-op, Robotron 2084, used in a pinball machine.

[@LyonsArcade]

This one came out before Robotron so it was the other way around :) Thanks for watching Tom Jones!

[@TomJones-wi4nh]

@@LyonsArcade Duly noted!

[@clintevans6643]

That was a great video Ron! The information you put out there is gold. I like the EM videos the best though. But appreciate all of your videos. If I make it down to your neck of the woods I’ll stop in to say hi while wearing my “Play at Joe’s “ t-shirt. Keep them coming brother!

[@LyonsArcade]

We try to do them in order so for instance we have a bunch more pinball videos than arcade games, so we'll do an entire pinball machine, this one's solid state... and then after we finish, we'll do a weeks worth of arcade game videos... and then after that, we'll do an EM, then a weeks worth of arcade, etc. So we'll have more EM games soon, see you then!

[@barendscholtus1786]

Great it works again. I don't get how people manage to connect the power wrong! My fav Williams is probably Black Knight 2000, let's see when it's going to be featured on this channel ;)

[@LyonsArcade]

We'll get one! Thanks for watching Barend!

[@laurenceharvey6202]

Spectacular as always ☻

[@xAnAngelOfDeathx]

Great machine, I used to really enjoy playing it!

[@LyonsArcade]

Thank you for watching Angel!

[@johnnydanielsen3438]

❤️ Live in a arcade hall in 83 and spend all my money on this pinball 🥰

[@cnfuzz]

I bet black knight 2000 didn't made you feel the same , good pinballs that draw you in are few , high speed had a similar effect on me , judge dredd was maybe the last one

[@dablakh0l193]

If you ever need to desolder a large number pin chip, get some bismuth based solder. Since it is a very low temperature solder, if you blob the solder over all the pins on each side on the back side of the board, you can heat both sides and the solder will stay molten long enough to pull the chip free. Then use solder wick to remove all the bismuth solder you added, and then use regular solder to attach the new chip.

[@LyonsArcade]

Thank you Dablakhol!

[@Jimgat83]

Another great series ron keep them coming👍

[@mdewidt]

You're the pinball wizzard ! 💪

[@danijelcar5184]

Great work on that Mpu it was a pain.... 😎👍

[@LyonsArcade]

Thank you Danijel!

[@blucklightfoxartinnovation9357]

great video well done joe's classic video games well done keep up the good work well done sir

[@TurnFullCircle]

cant wait to see this beauty working....cheers

[@telletran2558]

Love this channel.

[@LyonsArcade]

Thank you Telletran, we love having you here!

[@mre9789]

Thanks Ron! Love it.

[@LyonsArcade]

Thank you for watching, Mr. E!

[@JohnLaidlaw]

Living in a rural area, the only "arcade" near by was a truck stop that had this pinball. The sounds of this machine totally take me back. Thanks for showing the steps, now I need to convince myself NOT to buy the broken one I see on Kijiji...

[@LyonsArcade]

buy it buy it buy it buy it buy it buy it buy it buy it buy it :) Thanks for watching John!

[@gorillaau]

Oh what mess! Putting the magic smoke back in can be fun!

[@LyonsArcade]

We figured it out finally!

[@gorillaau]

@@LyonsArcade Yes, you did. Thanks for the awesome videos, with repairs that is part electronic and part electro mechanical.

[@frankgagliano9677]

Great job Ronnie. Man a lot of chips blown, how long did all the chips take? Great job on the sound board, sound familiar? Love that classic voice on those late 70s early 80 williams game. Thanks for filming Ronnie.

[@LyonsArcade]

I think once I started working on the MPU it was probably 4 or 5 hours on it. Thanks for watching Frank, we appreciate it as always man!

[@naytch2003]

RIP to the great Charlie Watts 🥁

[@LyonsArcade]

Yup he's off to join Bobby Hatfield! - kzbin.info/www/bejne/l4HFoIOtfKyerpI

[@andymouse]

Yeah.

[@naytch2003]

@@LyonsArcade along with Hank, Waylon, Johnny, Buddy, Elvis..

[@SteveJones172pilot]

Absolutely beautiful BK! That's an early one if I'm not mistaken.. It is like mine with the transformer in the back box. Didn't they move the transformer to the bottom of the cabinet in the system 7, so this one is one of the last ones, still using the system 6 power supply? Also, DONT FORGET TO FUSE THOSE GI BULBS.. If the rectifiers in the backbox had shorted, you'd have had a fire.. Well known Williams problem from this vintage..

[@LyonsArcade]

Not on the GI, on the switched illumination and the solenoids, thanks for watching Steve!

[@GHILLIESARCADEANDMORE]

Cool

[@LyonsArcade]

Thank you for watching as always Ghillies!

[@stephenmeier4658]

Oh man the Black Knight. I walked up to this machine as a kid and it had a credit so I started it up it was someone else's credit he saw me and started chasing me out the door I got away lol

[@LyonsArcade]

That's his fault for leaving it in there : ) Thanks for watching Stephen!

[@WildkatPhoto]

Man I had the same thought on that games list. I played Black Knight, Comet and Warlock. The rest I had never heard of.

[@troyleong7412]

I love how you explain electrical schematics like you actually think we know what the hell your talking about. LOL COME ON PEOPLE!!!!!!!! HAHAHAHAHAHAHAHAHAHA!!!!!!!!!!!!

[@LyonsArcade]

thank you Troy i'm just having fun hope you are too.

[@paulstubbs7678]

Nice repair journey, reminds me of when a mates old 8 bit computer (TRS-80 clone) got fried, something was loose in his printer and 240V mains power went back up the printer port and did that much damage it's not funny. First, replace all the blown PCB tracks (Yes, a big 'surge') then replace all IC's that are really hot, then replaced all IC's that were dead cold, that got us 99.9% there.... Amazingly the CPU and ROM's survived.

[@LyonsArcade]

Wow that's horrible, that could actually start a fire! Glad you got it going.

[@joshhardin666]

I can't tell without a closer look, but I think those replacement displays use caps to smooth out the strobing to a specific dc voltage value so the led's stay on which is how they are flicker free. - so if you max it out you "only" get 40 years per your math - I personally think it's still worth running them near or at max if you get 40 years out of it before you need replacements. personally I'd probably run them at ~90% (just shy of full) to try to stretch that just a bit, also most of those in my experience are really bright anyway (particularly compared to the vfd that you're replacing).

[@LyonsArcade]

It's interesting to think about at least, but yeah I don't know how long they'll last legitimately... thank you for watching Josh!

[@Ghosthuntert1]

Hey Ron, Don't you guys have a CRO ( occilloscope - not sure if I spelled that right ). A cro will allow you to track both digital and analog signals right through a circuit. I have two, a digital and an analog ( the digital can be a bit hard to read with analog signals at times) which I use when troubleshooting TV's, Amplifiers and even ripple on power and signal lines. Yeah, I know it's sometimes a pain to setup and connect but it can save you a lot of time chasing signals and it also allows you that comparison of signals if the signal is being scrambled by a faulty cap or something.

[@janbill79]

I've been with you from the first black knight, the second the third unless I lost track this might be the 4th ,( I don't know), all I know is I'm learning a lot and having a good time watching you figure all this stuff out. As, I have to work on a system 7 on Wms. star light. and I have to change all my displays. and relocate battery box and replace things under it it discolored ate up enough. but the funny thing is mine doesn't have that transformer and that metal surround cage . so what there's two power supplies on some of them the board and the transformer / but i have a big white circle thing maybe a capacitor

[@martywolfman]

Awesome stuff! Wow, such a simple mistake (and a really poor design choice) did so much damage! Awesome to see it up and running (ish) again. An absolute classic like this needs to be saved! Steve sounds a little confused though on the test switch speech 🤣

[@robertlipsett2535]

gottleib system 1 power boards had a one just as bad when you plugged it in upside down and put 60 volts where 5 should be

[@WreckDiver99]

"there was a hole blown in the bottom of it". LOL...Reminds me of my university days. I was taking a Hardware Interface class....the hardware kit cost us about $50 back then (A PIA, Logic Chips, clock chips, etc.). The TA running the lab reminded everybody to check their circuits a couple times BEFORE applying power, including the polarity. One student apparently didn't hear and as soon as she flipped the switch you heard POP....yep...blew the top off the chip. NOT a cheap mistake. Today that would be about $5 in chips, but way back then? LOL...Never forget it "That was my chip"...was all she could say.

[@gorillaau]

Getting an Electrolytic Capacitor backwards in a high power circuit can be dramatic! Keep it cased when initially powering it up.

[@WreckDiver99]

@@gorillaau Not too much anymore, they have those stupid vents designed in. no more fun. :( Back 40 years ago not too many had those vent systems, and you'd hear "POP" once in a while and the student just looking at their 47uf cap going "SH!T"... LOL...good thing those were cheap, not like the chips...

[@gorillaau]

@@WreckDiver99 Yeah, the vents has taken some of the fun out of them.

[@jaybrooks1098]

Still my favorite machine. Mostly because it trains the user into how bonuses work and how they could make your point values go skyrocketing without much instruction Gogar is a is a awesome game too I would change the plugs to different sizes or at least choose different sizes like take one of the plug inserts and fill it up with glue so you can’t put the wrong plug into certain other plugs. I feel the glue in the hole is not used then chop off the unused plug end

[@PlumGurly]

I imagine it might be a good idea to use a stronger regulator if you want to use the original boards to account for the slightly higher load on the 5v line.

[@jaybrooks1098]

Yay

[@robertlipsett2535]

hey ron have you ever thought about a head mount for your camera so you could use both hands while filming?

[@LyonsArcade]

Well i'd look pretty silly wearing a camera on my head wouldn't I? Thanks for watching Robert!

[@robertlipsett2535]

@@LyonsArcade but we wouldn't see you unless you walked in front of a mirror

[@shoominati23]

thats a pretty advanced game for 1980 .. have you fixed a smash TV machine yet? thats one i'D love to have in the poolroom

[@LyonsArcade]

I haven't done Smash TV Yet, you don't see those too often anymore! Thanks for watching Chuck U!

[@theoldbigmoose]

Ron have you ever used any of Caig Laboratories products on edge connectors and such? If so, what do you think of them for long term reliability? Like deoxIT and preserveIT?

[@LyonsArcade]

I haven't, I might try some though. Thanks for watching Big Moose!

[@cnfuzz]

Joe changed the sound eprom , when the customer plays his black knight " ladies and gentleman this black knight has been slayed by the knights who say Ni , Nie!

[@RVJimD]

Do you guys have a website with current inventory?

[@LyonsArcade]

Yes, it's www.LyonsArcade.com

[@TboneLoyal]

What camera do you use?

[@ejonesss]

it is possible to blow a transistor and send voltages back to the chips that drive the transistors and maybe even back to the cpu if the transistors short then anything can happen.

[@LyonsArcade]

yup, you can burn a lot of stuff up once that voltage starts going places it shouldn't.... thanks for watching ejonesss!

[@davidg-m1768]

This is the first one that I felt this is way out of my league…. Not easy to get all those chips in NZ, so after doing a few I think I would have bit the bullet for a new board. Really interesting though, as usual.

[@LyonsArcade]

Thank you for watching David!

[@jankro1]

Rohs means more cold joints!

[@LyonsArcade]

Thank you for watching, Jan!

[@kepler240]

21:03 always good for a laugh

[@LyonsArcade]

It bout got me!

[@Gitbizy]

Can you post a video of desoldering a chip and replacing it with a socket? Thanks

[@troyleong7412]

P.S. Even if I had a pinball that wasn't working....I wouldn't even dare try to do a fix on it. I'd ship it to you my friend!!!!!!!! :) :) :)

[@LyonsArcade]

You could fix it Troy, I have faith in you :)

[@jasonudall8614]

Wales is pronounced" Whales" like the big fish/ mammal thing when you say Wells I think of somewhere in Somerset ( county) but hay your channel your pronunciation

[@LyonsArcade]

o.k. i'll try harder thank you for watching Jason

[@liquidsonly]

I was puzzled where Wells was too. Maybe Cymru would be a less confusing way to say it. Then again maybe not.

[@jobelowen5500]

"Ill tell you my preferred... Alll dhe waay live baby!"

[@waynegram8907]

JOES CLASSIC, I'm not understanding why the Test ROM doesn't output a "strobe" for the lamps. I'm not understanding how the strobe signal takes the PIA lamp output +18vdc voltage and converts it to +6vdc for the lamps. Since the PIA chip for the lamps is outputting +18vdc for each lamp bulb but the strobe signal is strobes the 18vdc which makes it 6vdc for the lamps. I understand that the strobe signal is a logic pulse width modulation PWM type of signal, what I don't understand is how the strobe signal is strobes the 18vdc and turns it into 6 volts for the lamps.

[@LyonsArcade]

I'm not completely sure why it does it, but the input is 18 and the output on the lamp matrix is only 6 (a third)... and the reason has something to do with the way the lines are strobed. On the test rom it doesn't make the PIA strobe, it just makes it turn on and off, which allows all the lamps to have a full 18 volts and blows them all up! They're only designed for 6 volts. Thank you for watching Wayne like always!

[@waynegram8907]

@@LyonsArcade It seems that the PIA chip "steps down" the lamp voltage from 18vdc to 6vdc. That unusual to have the PIA input is 18vdc and the PIA output is 6vdc. Ya the test rom is programmed "incomplete" because it needs to strobe the PIA chip to prevent blowing up all the lamps at 18vdc. I think the strobe signal is a pulse width and the duty cycle determines the PIA chip output voltage which is a 1/3 of 18vdc is equals 6vdc based on the pulse width/duty cycle of the strobe signal to the PIA chip. Thanks for making the videos and comments back to me.

[@waynemacleod3416]

should buy a cheap oscilloscope. just a real basic one. it'll help alot for any analog work. that way you can actually see the analog form.

[@LyonsArcade]

I own 4 oscilloscopes, thank you for watching Wayne!

[@naytch2003]

Someone put half a loaf of bread on an NZ auction site and it's now up to 4k🤣😂

[@Columbiastargazer]

Save The Wales ! :)

[@LyonsArcade]

We're gonna get it :) Thanks for watching as usual!

[@Jeroen_a]

RoHS.... It's a EU law thing to prevent e-waste (probably lead free solder is being used and such). it aims to prevent the risks posed to human health and the environment related to the management of electronic and electrical waste. Still i would not recommend to eat the displays but yeah....

[@LyonsArcade]

I'm on the repair side instead of the manufacturing side so I don't run into it much....

[@senilyDeluxe]

11:52 swapped in a "new" chip... from 1974! Shouldn't customers pay extra if you use period correct components? Also a dirt cheap super simple chip like a 7406 would cost half a fortune in '74! (no, I don't have a problem with using replacement parts that are older than the machine they fix - I kinda do that regularly myself - I remembered I had to get a 7402 for an Apple II in around 2014 and I went to the local electronics shop - RIP btw - and got a new one, and it was made in 1972! Still works fine, just gets a little warm.)

[@LyonsArcade]

That 1974 chip needs to be used on something, might not run into anything older than this to put it in :) Thanks for watching as always SenilyDeluxe!

[@naytch2003]

Zip a Dee Doo dah, zip a Dee ay😁

[@LyonsArcade]

Thanks for watching Naytch!

[@naytch2003]

@@LyonsArcade always a pleasure to see a master at work

[@robertlipsett2535]

too bad we didn't see you diagnosing the mpu board or did that rating start going to R with swearing. that was a lot of dead chips and it reminds me of one day I almost had a game finished just had one lm3900 to replace but wasn't sure at that moment and was diagnosing it and slipped putting high voltage into 5 volt connection, a bang and fire when tants exploded and 8 dead logic chips including ram memory a dead power supply with no schematics anywhere took me two days before I could bring myself to touch it again. I hate fixing mistake driven damage ,its to thorough.

[@LyonsArcade]

Sometimes if we're knee deep in it and we don't actually know what's wrong, we keep running into other problems, we can't really film it all because we don't really know if it's going to work. So sometimes we're swapping stuff we're not sure if it's broken, if it ends up fixing it then we just review what we did. Thank you for watching as always!

[@Zerbey]

Make sure you label those switches before you give it back, some future technician will thank you!

[@jaybrooks1098]

I remove my parents had this old 1985 van and it was about 1990 they got a jump from a AAA tow truck That proceeded to hook the lines up backwards and blow out the computer the alternator the ECM the fuel pump three relays and then it melted the grill because it got red hot. That was a mothertrucker to get working again

[@LyonsArcade]

Wow and it was the AAA guy! Crazy! Thanks for watching Jay!

[@DiggingNorway]

Is this video #3 in this series?

[@LyonsArcade]

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