I saved this Macintosh by a hair's breadth!

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#macintosh #vintage #recapping #electronics #repair
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**This Macintosh Color Classic is sooo unhappy. Will I be able to save it??**
Thanks to the Tinkerdifferent community for helping me with this project!
tinkerdifferent.com/
Thanks to ‪@THEtechknight‬ for the support as usual!
Thanks ‪@BranchusCreations‬ for providing the Analogue board recapping guide!
Check out Recap-a-mac here: recapamac.com.au/
The Short triggering the recapping challenge with ‪@adriansdigitalbasement‬
• BEST way to remove SMD...
CR2032 Toaster project: github.com/alxlab-zone66x/cr2...
00:00 Intro
01:27 Overview
03:49 Washing the Logic Board
04:13 LB inspection
05:20 Adrian is challenging me :)
08:06 Fixing the dull joints
09:31 Testing the Analogue Board
13:13 Analogue board inspection
14:47 Saving the Analogue board
16:58 Shutdown enable line
19:41 Tracing the lines
23:20 Testing the Analogue board
26:06 Testing the Shutdown Enable line
27:25 Reassembling
27:49 Fixing the RAM
28:32 Battery replacement
30:36 TESTING!
33:35 Floppy EMU issue
34:56 Floppy service and repair
36:12 Floppy FAIL
38:49 Floppy WIN
41:00 HDD test
42:36 Installing 7.5.3 and issues
43:54 Mac is not happy
46:32 Outro

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Опубликовано:

25 июн 2024

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Комментарии : 133

@bitsundbolts 11 дней назад

Wow, what a tedious work to get this Apple Computer to work! Congrats on getting that far - and I am really impressed by this bag of replaced capacitors! Hopefully, you will be able to fix the remaining issues of this MAC. Nice video!

@tony359 11 дней назад

Tedious? Oh no, it's fun! :) Scary sometimes :) Thank you, fingers crossed!

@necro_ware 12 дней назад

To reflow the corroded joints I usually use the engraving tool to go over the old solder first to scratch off the some of the oxide on the surface. After that the fresh solder can intrude into the joints through the cleaned spots much easier.

@tony359 12 дней назад

Thank you - yes, I learnt that from Bit und Bolts - I just don't have the engraving tool yet :)

@rickchagouri-brindle6520 12 дней назад

Yep, me too! Works for me . . . most of the time!

@willyarma_uk 11 дней назад

I repaired a game gear with bad caps a while ago and like you say its like trying to solder concrete. I tried a tiny drop of white vinegar and it totally worked, it let me get some new solder on. Obviously I washed the vinegar off after.

@tony359 11 дней назад

I suspect the cleaning fluid did a similar action - I think it's basic though - not acid. But I think it helped. Though Necroware's suggestion is probably the best, I've seen how well those engraves dislodge corrosion. I somehow cannot persuade me to buy one :)

@necro_ware 11 дней назад

@@tony359 They cost 15€ incl shipping. Definitely worth it. One of my most used tools.

@ped-zero 10 дней назад

42:21 Seems like the HDD was trying to play "They Don't Care About Us".

@tony359 10 дней назад

is that a song? :D

@SuishoShizuku714 10 дней назад

@@tony359MJ the King of Pop ;-)

@tony359 10 дней назад

Ah of course! You're right :)

@chainq68k 12 дней назад

Best "OMG floppy moved" jump scare in the history of retro channels. :))) Keep it up.

@tony359 11 дней назад

ahahaha yes! I always expect things are exploding on me... :D Thank you!

@maxtornogood 11 дней назад

Leakage is just a given with these Macs. That bath of cleaning solution works real nice. That rubber is the "Varta" of old Quantums! You're so close to a fully working Mac!

@tony359 11 дней назад

Such a shame those HDDs are all failing... :(

@SeanBZA 9 дней назад

@@tony359 Quantums, till you power it up it might still work, though generally it will not. Have had way too many of them do a Deathstar on me, before they vanished off the market.

@CallumRepairs 4 дня назад

Cool stuff. Fingers crossed you manage to get this Mac fully up and running!

@tony359 4 дня назад

Fingers crossed - not it's the coolest part! :)

@MikesArcadeMonitorRepair 12 дней назад

The title of this video alone deserves a like. Excellent use of the word breadth. Great job.

@tony359 12 дней назад

ahah thanks!

@rogiervanlierop 11 дней назад

After a avarage working day on my end, you really cheered me up with this video and especially with your great reaction when the Mac came alive 😊. Really made me smile big time! Thanks!

@tony359 11 дней назад

Thanks for that, it makes me happy to know that my video is improving someone else's day :)

@blakecasimir 11 дней назад

Another fascinating and educational journey. Good luck with the further diagnosis, Tony.

@tony359 10 дней назад

Thank you! I look forward to continuing!

@Roobotics 11 дней назад

For cleaning contacts I'd suggest against wedging cotton-swabs into them, the little hook shapes in the back tend to snag the excessively loose fibers, find a reasonable thickness of plastic and wrap a paper towel over the edge(not too wide), pinch on both sides, IPA or dry. Ideally something even more sturdy like a lintless cloth. The pressure applied to the pins is a function of the plastic thickness picked, and it focuses the cleaning effort all on the areas that will be able to touch the pads.

@tony359 11 дней назад

I see what you mean, thanks for mentioning. I do use a teethless pliers to "flatten" the cotton bud before I stick it in the connector. It didn't feel like it was getting stuck but I see your point, I'll be careful! :) A small piece of plastic sounds like a good idea - but I'd need to use some cloth, blue towel would probably break easily. Thanks again!

@thomasandrews9355 7 дней назад

I've restored quite a few CC in my time for customers. I usually remove the EGRET/CUDA and clean the pads. Nice to see you had no major failure points!

@tony359 7 дней назад

Yes, maybe I could have removed it as well - sometimes it's a balance between "restore it" and "leave it in peace as much as possible as it might break"! :) Thank you!

@thomasandrews9355 7 дней назад

@@tony359 if you ever need help with a Mac hit me up. I run Amiga of Rochester…guess same holds true for amigas

@tony359 7 дней назад

Thanks Thomas! I found your website! I'll bear that in mind - thanks again for offering!

@rickchagouri-brindle6520 12 дней назад

Another great video, cheers! I have had my share of projects like this . . . one thing leads to another, very frustrating but also greatly challenging!

@tony359 11 дней назад

It's rewarding when (IF) you can fix it at the end but yes, it's challenging. Particularly because I don't have spares so it might be even more challenging! Thank you!

@RudysRetroIntel 12 дней назад

Excellent video and work!! What cleaning solution are you using? Thanks for sharing

@tony359 12 дней назад

Thanks! I forgot to share that: it's called "Electrolube SWAS" - it's not cheap but I've been re-using mine for many years. It's water based, so no nasty fumes. But you'll need gloves.

@general23cmp 8 дней назад

Great video!

@tony359 8 дней назад

Thanks!

@walter7671 10 дней назад

Hard drives break when they are opened, if everything works well with the FDD the machine will surely work. Let's assume the power supply is working fine, maybe the problem is coming from the HDD but it's hard to find one of those nowadays (at least without digging through the trash haha) Excellent work as always, a big hug for you!

@tony359 10 дней назад

Yes, I am aware that opening the HDD is not great. To me it was already dead, I opened it for curiosity mostly. That said, older HDDs might be a bit more tolerant to some specks of dust. But it's gone anyways. I now have a BlueSCSI to test but I have also found an issue with the logic board so more tinkering will be required :) Watch this space and thanks for watching!

@walter7671 10 дней назад

@@tony359 In computers, the top 3 hardware problems are disk, memory, and power supply (even if you read the correct PSU voltages). I look forward to the next video in 3, 2, 1... 😅

@aleksandardjurovic9203 11 дней назад

Thank you for your hard work! A great video.

@tony359 11 дней назад

Glad you enjoyed it!

@Bob-of-Zoid 9 дней назад

I have a Macintosh Lisa that was in full working condition up to a decade ago: Hard drive failure.😢 I have kept it well maintained up to that point, but had it in storage until more recently. It still powers up, the screen is out of alignment (Needs adjusting), but it can't read the hard drive anymore, and I have nothing on floppy for it (or anything else for that matter), nor used the floppy drive in decades, only cleaned and lubed it as part of yearly maintenance, which I have done, complete with using (playing with) it for an hour or two, to all of my computers as a practice since since 1980. Id love to sell it, which would do much better in fully working condition, which I don't think it's too far from, even with some other hard drive and a hack of some kind, and have read it's possible (has been done), but that was a long time ago. Side note: I'm on Linux; I don't do Windows, nor Microsoft anything at all for that matter, so no suggestions implying their use considered, and I probably have more suitable tools on Linux for that sort of thing anyhow.

@tony359 9 дней назад

Hard drives will inevitably all fail at some point. I'm not familiar with the Lisa but I'm sure there are alternatives - maybe something you can fit in the HDD casing so it retains the overall look? Well done for giving some yearly TLC to your machines and thanks for watching!

@Bob-of-Zoid 9 дней назад

@@tony359 I'm surprised it lasted that long. Yeah, the plan would be to make it go unnoticed, and I am fully capable of making a good and durable mount for it... Taking care of ones stuff, has a much higher return than the little bit of time one saves not doing it. When moving to a more modern computer, I always use the old one on the network, and demote the rest down the chain, so my network also improves over time.

@curtisator42 5 дней назад

Have a look at the 5v rail with an oscilloscope - you might find the voltage is wildly unstable. The analogue board may need a thorough wash to remove any traces of leaked electrolyte.

@tony359 5 дней назад

Very good point, I shall do - though meanwhile I found a fault with the board and I hope that that is the cause of the instability. I cleaned the analogue board but didn't wash it - I don't feel comfortable in washing the flyback and the various transformers (but I could remove them from the board of course). I'll definitely check the 5V with a scope, thank you!

@curtisator42 5 дней назад

@@tony359 yeah it's a bit of a pain. I had to do this with a Classic II Analogue board recently. Removed all transformers, coils and the flyback of course. Soaked for a while in hot soapy water then rinsed with distilled water. Seemed to improve things immensely with regard to the voltage stability, which was causing all kinds of failures to boot and wobbly screens. Not sure why, but the voltage regulation seems to be hyper sensitive to whatever leaks out of those capacitors.

@tony359 5 дней назад

@@curtisator42 Ok thanks for that. I spent some time with cotton balls and isopropyl cleaning things around but you might be right. It's a single layer board so removing those big components is not too hard. I'll definitely check the voltages thanks!

@pepealexandre 11 дней назад

Great video. 👍👍

@tony359 11 дней назад

Thanks 👍

@sokoloft3 11 дней назад

Awesome! Great work Tony. Older PC's seem more straight forward than modern stuff. I have a 2014 Macbook with corrosion damage thats been on my bench. PP3V42 has 1-2.5 ohms of resistance. Got a bench supply to inject voltage into it, and it'd only take 460mA. So some other folks and I have come to the conclusion the SMC is shorted or maybe has some corrosion under it. I need to pickup some stencils and a new SMC. Stencils for some old ram modules I can practice on since I haven't done BGA stuff yet. Hoping my 858D doesn't let me down, its not a very big chip so I should be able to get it. Fingers crossed!

@tony359 11 дней назад

I also have an old macbook - older than that - to look at. It's some friends'. It was shipped to me as "it shuts down after a bit" but it arrived making just a white screen. It might be my next video, I haven't decided yet :) Thanks for watching!

@sokoloft3 11 дней назад

@@tony359 Sounds good! I look forward to maybe seeing it! Still debating on what to do with mine. I got it for $20 without the battery, and a firmware locked 2012 logic board. If I cant fix the 2014 logic board I'll have a chassis doing nothing which is a shame. They're only worth $50 for the entire laptop and the logic boards are listed at $50 on ebay. Not very economical or worth fixing at that point. :( Very good practice and is what I ultimately want to do for work.

@tony359 11 дней назад

oh yes, the vast majority of repairs I do are "not worth the money" 100% :D Let's call it permanent training! :)

@AlaskanInsights 7 дней назад

a lot of them caps from the 90's and early 2000's like that have fish oil... they smell great.

@tony359 7 дней назад

aehm... I'm not sure I like that smell! :D

@sobertillnoon 12 дней назад

With the rust on the pins you could put some "comformal coating" on them to prevent more oxygen getting in to continue the corrosion. It will still continue to rust but it will be slowed down significantly.

@tony359 12 дней назад

Thanks - I'll think of something, your idea is good!

@watchmakerful 7 дней назад

If rust or corrosion on chip pins reaches the chip case, the chip is 99% dead.

@tony359 7 дней назад

The Egret is not something you can buy easily unfortunately so I guess it's good until it dies :) Fingers crossed!

@alisontelford9339 11 дней назад

The old dead quantum issue is a nuisance! I laid in a stock of bluescsi boards (I had pcbway make the pcbs and got all the components from LCSC, ended up being pretty cost effective to make 5 boards. Plus lots of tiny fiddly smt work, which is always a good time :) Fun and great video as always!

@tony359 11 дней назад

I'll have a look myself - I'd like to have one. The owner of the CC sent me one but it will go with the CC. Thanks for watching!

@willyarma_uk 11 дней назад

The video can't get too long, not possible! ;)

@tony359 11 дней назад

ahaha thanks - this is already longer than my mental limit! 48 minutes!!! :)

@SeanBZA 9 дней назад

Power supply only regulates the 5V rail, so the 12V rail will not be regulated well.

@tony359 9 дней назад

of course - I was just not expecting 11V :)

@SeanBZA 9 дней назад

@@tony359 I have seen them go anywhere from 10 to 14V, depending on the load on the 5V rail and the load on the 12V rail.

@tony359 9 дней назад

well good to know then! Thank you!

@johnmay4803 9 дней назад

there must be thousonds of old kaps in that bag! i bet it stinks of fish lol

@tony359 9 дней назад

ahah yes! No, those never leaked, they dried out and read silly numbers but never leaked. The caps on this Mac DID stink though! :D

@andygozzo72 7 дней назад

capacitors can certainly test ok with test meter but fail under voltage, i had this with one in a Roberts R505 radio, it would go very low resistance when powered but go 'ok' when voltage removed.. they seemed to use one with insufficient voltage rating,

@tony359 7 дней назад

yes, I had that myself on several occasions!

@boredwithusernames 11 дней назад

I used to repair Video Cassette Recorders back in the day and there was a brand that was renowned to use that same green grease on the plastic deck parts. It sets into a form of solid resin after a few years and locks the deck up solid and, just as you found here in your video, it was a pain to remove. I am not sure what the grease is called or which brand of VCR Deck used it but it is worth noting as you may come across it again in another MAC restore ;)

@tony359 11 дней назад

horrible thing! Thankfully those gears can be 3D printed! Thanks for watching!

@BeniD82 11 дней назад

See if you have the A/ROSE extension in your extensions folder, if you do, remove it. I believe System 7.5 likes to install that one and the only thing that it's good for is crashing the system during the boot process :) (only used by certain really old nubus cards and was never something that caught on so good to remove as it's not applicable to the CC).

@tony359 11 дней назад

Thanks, I'll keep that in mind. I've got a BlueSCSI to test and I have now found a fault with the board so something is definitely wrong - watch this space :)

@MarcoGPUtuber 12 дней назад

I would love to know the name of the antioxidant soap so I can try to find it or a similar concoction here.

@tony359 11 дней назад

Apologies, I forgot to mention. Electrolube SWAS - it's expensive but I've been re-using it for years. it's designed for ultrasonic but ok for manual as well. It's water based so no nasty fumes - but you'll have to wear gloves.

@Mediateritorist 11 дней назад

Very great job, Tony! Couldn't it be a termination issue to the hard drive to fail? Only a suggestion ;-) Best Regards, Georg

@tony359 11 дней назад

Hi Georg - the older Quantum drive is terminated - at least I see the resistor packs. But I am assuming it's working. I now have a BlueSCSI for further tests! :) Thanks again!

@Mediateritorist 11 дней назад

@@tony359 Dear Tony, yes, Adrian also works with the BlueSCSI. But he also had termination problems (at least on the MacPlus) and had to make a small modification to the Plus board (adding in a diode)... That's why I had the idea that your Color Classic might also have some problems with the termination... But on the other hand: the second hard drive that you took out of the SE works perfectly in the SE (as you said). Perhaps your Color Classic also has an error related to the SCSI controller on the Classic motherboard?!?

@tony359 11 дней назад

@@Mediateritorist the newer Quantum is 100% dead - it doesn't initialise. The older quantum (from the SE) works on the SE. I'll test blueSCSI on the CC soon. And yes, just yesterday I added that diode on the Plus to have termination power. I suspect that if termination was a problem, the drive wouldn't work at all. But the BlueSCSI will tell us if the LB has a problem! (Which it does, little spoiler here!)

@Mediateritorist 11 дней назад

@@tony359 Oh, thanx for the spoiler 😂 I'm really very excited...

@jeremiefaucher-goulet3365 5 дней назад

I think it's time for you to buy a pair of hot tweezers. That would be better than using two irons with those caps.

@tony359 5 дней назад

I have them - cheap ones, fair enough. I don't think they work with SMD caps, the area to be heated up is very small and there is plastic around it. I guess maybe a proper JBC/Hakko tool might work better than my chinese version though. They work beautifully with SMD components such as ceramic caps and resistors though.

@jeremiefaucher-goulet3365 4 дня назад

@@tony359 Interesting. I admit I haven't tried myself.

@tony359 4 дня назад

It might be time to consider a good one again though. Like a proper set. I de-solder hundreds of caps - some are stubborn and really require the biggest tips I have - they are soldered on power and ground planes. Hot tweezers won't work there for sure. But for the more "normal" ones... Though, using two irons it only takes 1-2 seconds on the "easy" caps. But thanks for mentioning!

@snakezdewiggle6084 11 дней назад

Tony, you have the patience of a Saint, my friend. I use Borax disolved in warm water for everything, but it has been banned in the UK. I buy it in the supermarket here. Cleaning Gold contacts. Just white eraser for pencils. What is the green one you used? That big HDD, they will pull the 12volt rail down to 11.1v at startup. I had 10 in a NAS Raid Array, with 900 watt power supply. Had to mod the psu to 14volts for startup. The battery you replaced, is it rechargeable?

@tony359 11 дней назад

No, the battery is non-rechargeable so a 2032 will work with no mods. The green fluid is Electrolube SWAS. I remember Borax here, I didn't realise it had been banned. Eheh, I like those little challenges, assuming I can get to a working system!

@snakezdewiggle6084 11 дней назад

@tony359 Big Clive said about the Borax ban. I use it on carpet, upholstery, clothing. Deodorizing the washing machine. Ant poison is made from Borax + sugar.

@simontay4851 12 дней назад

5:40 WOW! That big bag stuffed full of caps is only 6 _months_ worth! You _really_ HAVE been busy. Must be a thousand in there, _at least_ . Did these all come from macs?

@tony359 11 дней назад

eheh no, it's a different project! I don't know what to do now, the bag is full... :)

@andrewlittleboy8532 11 дней назад

22:22 does that tantalum have a small hole in the top? Either blown or about to blow. 🤔

@tony359 11 дней назад

Well spotted! I suspect it's just dirt but I'll double check for safety! I didn't even notice there were tantalums on that board!!

@andrewlittleboy8532 11 дней назад

@@tony359no problem. Really enjoying all your videos.😊

@SireSquish 10 дней назад

You said "cleaning fluid", what is the cleaning fluid that you're using?

@tony359 10 дней назад

it's called Electrolube SWAS, it's a bit expensive but I have been re-using mine for years. Water based (so no nasty fumes) but you'll need gloves.

@SobieRobie 11 дней назад

After solving this mistery you can Apply ;) for a Macintosh Rebuilder Certificate ;)

@tony359 11 дней назад

I'll be a Genius too! :D

@colindevaux4476 11 дней назад

buy a lotto ticket if your that lucky by chance at repairing floppy drives :)

@tony359 11 дней назад

ahahaha noooo, it only works with rusted drives unfortunately! :D

@FooBar-sf2qk 9 дней назад

Unfortunately, this won't work for long with Kontakt 60. Like many contact sprays, Kontakt 60 is corrosive and must be completely removed after a few minutes of exposure, otherwise there won't be much left of the contact surfaces after a while.

@tony359 9 дней назад

Hello - the directions for use of Kontact 60 recommend to rinse it afterwards but not because the spray is corrosive, but because without protection the corroded parts will corrode again. I do have Kontact 61 as well which I usually apply after applying 60 - I rinse with dry contact cleaner in between. But I don't think 60 is corrosive: it's just that it might expose unprotected areas to air, leading to further corrosion. For undamaged gold-plated contacts, Kontact 60 won't corrode them and there won't be any damaged part which might get corroded again later on. Thanks for watching!

@FooBar-sf2qk 5 дней назад

@@tony359 Hi, look on the verdigris and dark coating in the area of application after a while. That is the reason why the technical datasheet recommends to wash it away. Kontakt 60 is very aggressive, if you use it e.g. on a crackling potentiometer (radio), not only will the crackling noise come back, it even eats away the resistance track. Kontact 60 is good for heavily oxidized contacts such as switches, but for electronics it is usually overkill and can cause permanent damage if used incorrectly. Teslanol T6 or maybe even Kontakt 61 is the better option and suitable for permanent application. By the way, gold contacts do not corrode, so no need for Kontakt 60. If they do corrode, the gold plating is already in bad shape and you don't want to damage it further.

@tony359 5 дней назад

@@FooBar-sf2qk Verdigris will be affected of course, that is why it's a good idea to have 61 as a final treatment, to protect with an oil film so air exposure cannot oxidise again. But you don't have uncoated copper contacts on a connector, they would oxidise very rapidly - if you see raw copper, there has been corrosion which has eaten up the coating and that's why using 60 only will "make things worse", but not because the 60 is corrosive! I sent Kontakt kemie and email anyways to clarify.

@FooBar-sf2qk 2 дня назад

@@tony359 When verdigris appears after using Kontakt 60 that has not appeared in the same place for decades, then Kontakt 60 cannot be innocent. Verdigris only forms in a short time in corrosive environments. It is not without reason that radio hobbyists warn against the incorrect use of Kontakt 60.

@tony359 2 дня назад

@@FooBar-sf2qk Do you have a link where this is being discussed?

@uwepolifka4583 11 дней назад

When was the plastic bag invented? A simple trash bag, airtide sealed around the Mac and all rust and dirt stay outside over the years.

@tony359 11 дней назад

ahahaha! Maybe, but storing a computer in a shed or uninsulated garage is like storing it in your garden. I know because my "workshop" was one of them before I noticed everything was getting damaged and I decided to insulate it. But yes, a plastic bag would have done wonders... :)

@Snowsea-gs4wu 10 дней назад

You are right but I sure don’t do that with my stuff in storage but great idea!

@pederb82 7 дней назад

I have to agree with Adrian. What you are doing when removing caps is highly damaging for the circuit board. I’m glad you’ve been lucky until now but you won’t be so happy when you destroy a rare piece of history. The stress you cause with all those heat prolonged heat cycles make the solder pad come loose off the PCB. In fact I find it extremely rude and unprofessional that you take on paid work and doing that to the boards. YOU might get lucky getting it swapped now. But no regard for the future of the product. What a shame to see.

@tony359 7 дней назад

This is a such a strong comment! I appreciate and respect your opinion - though pads and components are designed to get to those temperatures. Yes, those are 30 years old and weakened but between pushing my luck applying torque to them, I'd rather push my luck by working within the original manufacturer specifications. As I said, if that works for you, then happy days. Thanks for watching!