This Acorn A3000 keeps failing - Repair video

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On the bench an ACORN 3000 from 1989, a great little machine in need of some TLC. The Acorn though had some hidden faults and kept me entertained for a while!
Take look at Alex's channel ‪@bitsundbolts‬, it's amazing!
Acorn online forum: stardot.org.uk/
Swindon museum of computing: www.museumofcomputing.org.uk/
Open Source Scan Converter: junkerhq.net/xrgb/index.php?t...
Composite "add-on" for OSSC (not affiliated): www.aliexpress.com/item/10050...
USB HDMI capture device (not affiliated): www.amazon.co.uk/gp/product/B...
00:00 Intro
03:10 Power up and overview
04:13 Capture setup
05:36 Inside the A3000
09:34 Inspecting the damage
14:01 Fixing the traces
15:47 Socket installation
16:15 Battery solution
18:06 ROM cleaning and refitting
18:26 System overview
21:12 Testing the system
22:23 Floppy service
23:26 Fault #1 - HDD
26:23 Fixing the HDD
29:32 Fault #2 - CMOS
32:21 Fixing the CMOS
36:21 Final test
38:59 Outro

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Опубликовано:

28 июн 2024

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Комментарии : 261

@gpamob 10 месяцев назад

Adore these early ARM machines, they seem so much ahead of its time, and at the same time, very retro nowadays! Thank you very much for yet another great video sir!

@tony359 10 месяцев назад

Thank you for watching!

@thomasjosephlamarque2927 10 месяцев назад

Can’t believe I haven’t been to the Swindon museum. Even though I work there. I shall make a special effort next week to go. Thank you.

@tony359 10 месяцев назад

I might be there fixing things! If you ask for the curator, he knows me! ;) I am still getting to know the staff! I hope you enjoy the visit!

@Snowsea-gs4wu Месяц назад

I liked the video and I like watching Tony's videos! Thanks Tony!

@tony359 Месяц назад

Thank you!

@jayfowler4747 10 месяцев назад

Brings back memorys of my youth... i always wanted one of theses but could not afford one as a penny less student

@tony359 10 месяцев назад

Well, those were expensive machines back in the days! Computers were as expensive as cars! Thanks for watching!

@rscelectrical7091 4 месяца назад

Sadly i only just found your channel but this video was a pleasure to watch, i look forward to watching the rest of your content 👍👍

@tony359 4 месяца назад

It's never too late! :) Welcome and thanks!

@rodhester2166 10 месяцев назад

Another great video of a computer that is not seen very often at all.. thanks

@tony359 10 месяцев назад

Thank you for watching!

@ricardog2165 10 месяцев назад

Ooh that PET 2001 at 0:45 was my first introduction to computing!

@tony359 10 месяцев назад

I hope I can repair one of them one day!

@JeepinBoon 10 месяцев назад

Happy the museum said "YES". Great job diag and repair.

@tony359 10 месяцев назад

Thank you for watching!

@JeepinBoon 10 месяцев назад

@@tony359 I love watching videos like this while repairing electronics. One major pickup is "common" is NOT "ground". You can blow up a scope input or probe with that thinking.

@tony359 10 месяцев назад

@@JeepinBoon Absolutely, I learnt that the hard way! :) Did I make that mistake in this video? I am always happy to learn something new!

@JeepinBoon 10 месяцев назад

@@tony359 Not at all.

@jameshearne891 10 месяцев назад

The "inductors" are actually just 0 ohm links, the single Yellow stripe is commonly used on 0 R links. They may well have created options for inductors to be fitted in those locations, perhaps for the US or somewhere with tighter emissions regulations but they just fitted links on this board.

@tony359 10 месяцев назад

Good to know - I trusted the PCB which says "L" on them :) Thanks for watching!

@taffeylewis 10 месяцев назад

Great repair Tony. It's one of those machines I dreamed about owning when I was a kid. I may have to take a trip to Swindon so I can play with it :-)

@tony359 10 месяцев назад

I am so impressed by that machine! It's going on display tomorrow! :) It's so nice to know that it's having such a noble purpose! Thanks for watching!

@charlesdesmond1 10 месяцев назад

Another great job! Thanks for preserving history

@tony359 10 месяцев назад

It's a pleasure! Thank you!

@MrProwler112 10 месяцев назад

Thank you for another great video ! Love the attention to detail. Keep up the good work !

@tony359 10 месяцев назад

Thank you for your kind words!

@overnxted 10 месяцев назад

Excelent work, as always!!!

@tony359 10 месяцев назад

Thank you!

@mrt.7146 10 месяцев назад

Amazing - love to see more on these ground breaking machines 🤩

@tony359 10 месяцев назад

Thank you - I hope I can come across another one (or similar) in the future! I know there is a 3010 at the museum which also goes on Supervisor :)

@lukedavis436 10 месяцев назад

now this museum is somewhere i Have to visit! it is a tech geeks dream!!!

@tony359 10 месяцев назад

It is :) Thanks for watching!

@rogiervanlierop 10 месяцев назад

Keep these great videos coming, I love them!!

@tony359 10 месяцев назад

Thank you!

@mk500 7 месяцев назад

This is one of my favorite of your videos. Love that machine!

@tony359 7 месяцев назад

Thank you! It's an impressive one indeed!

@thealphageek1975 10 месяцев назад

Another amazing repair... and repair... and repair lol. Great work once again!

@tony359 10 месяцев назад

Thanks again!

@sokoloft3 10 месяцев назад

Nice! Another great repair.

@tony359 10 месяцев назад

Thanks 👍

@mikeselectricstuff 10 месяцев назад

The A3000 wasn't the first ARM machine Acorn sold - that was the A305/310/410/440 series

@tony359 10 месяцев назад

You’re correct and not the first one to mention! I mixed up the first ARM CPU with the first ARM machine! Thanks for watching!

@marekkompis3725 10 месяцев назад

Awesome video! I enjoyed it a lot!👍

@tony359 10 месяцев назад

So happy you liked it! Thank you!

@Bergi2000 10 месяцев назад

Thank you for the great video! Many surprises… 😮 ❤

@tony359 10 месяцев назад

It'd be boring otherwise :) Thank you for watching as usual!

@2009numan 10 месяцев назад

I loved how you blew the dust out of the floppy drive over the open PC so it went into the PC instead LOL

@tony359 10 месяцев назад

Yep, very clever of me! (ops!)

@timelordtardis 10 месяцев назад

One of my favourite computers. Well done. A great repair.

@tony359 10 месяцев назад

Indeed a beautiful machine! Thanks for watching!

@hacktheplanet. 10 месяцев назад

Had one of these for a few years, end up being absolute money pits. Parts are stupendous now (providing it's not a small fix).

@tony359 10 месяцев назад

finger crossed! :) Thanks for watching!

@johnhammond3482 10 месяцев назад

thanks for the upload of this video most appreciated

@tony359 10 месяцев назад

Glad you enjoyed it! Thank you!

@philipwalker2800 8 месяцев назад

Don't know if anyone else has said this but I had an Archimedes A310 with what I assume was a version 1 ARM inside. I'm pretty sure this came out before the A3000 series and the RISC PCs (Still using ARM). 1MB RAM and one floppy drive. For the time a brilliant machine. I think it is still in my loft somewhere. At the time it cost over £1000 but I thought it well worth while. It could emulate a PC in software if I had to. The 'Arthur' operating system was 'interesting' but worked well enough until RiscOS came out. This was about the time that Amstrad brought out their early machines . Actually bought one of those for work because we needed an actual PC to run some proprietry software. No comparison! Enjoying your videos and catching up slowly.

@tony359 8 месяцев назад

I have little knowledge of the Acorn machines but I have to admit they are amazing for the time they were released! The A310 was still fitting an ARM2 - I read that the ARM1 was never released. I did a bit of confusion in the video, I wanted to say the ARM2 was the first ARM CPU released, not that the A3000 was the first ARM machine released! Glad you're enjoying the videos - and thanks for watching!

@tomhekker 10 месяцев назад

Just got this vid recommended all of a sudden! Great video, subbed to your channel!

@tony359 10 месяцев назад

Thank you and welcome!

@benjaminwirth5192 10 месяцев назад

Great video, Tony 👍

@tony359 10 месяцев назад

Thank you!

@user-ml7bg6ki4y 10 месяцев назад

Thanks for the amazing video

@tony359 10 месяцев назад

Thank you for watching!

@miguel_gutierrez 10 месяцев назад

The video is very well recorded thanks

@tony359 10 месяцев назад

Thank you, I appreciate the feedback!

@bitsundbolts 10 месяцев назад

Great repair - what a stubborn machine :) It really tested your patience! Thanks for the shout-out!

@tony359 10 месяцев назад

shout-out well deserved! Thankfully it was not too stubborn! :) Thanks for your visit!

@arnlol 10 месяцев назад

Nice repair! I’m glad you went the extra mile and actually fixed the hard drive instead of being like "I’ll replace it with a CF card" like many people seem to do. PCB faults isn’t what people usually think about when a hard drive is failing, but here’s proof that it is not always the mechanical parts that goes wrong.

@tony359 10 месяцев назад

Thanks! I was also a bit lucky on that one :)

@Jonne013 10 месяцев назад

Awesome work as always! I really liked seeing that demo floppy with the catchy beeps and bops.

@tony359 10 месяцев назад

ahah psychedelic indeed! :) Thanks for watching!

@cocoe68 10 месяцев назад

Very interesting chain of repairs started by a killer battery!

@tony359 10 месяцев назад

Batteries are evil! :) Thanks for watching!

@zebo-the-fat 10 месяцев назад

Nice, keep up the good work!

@tony359 10 месяцев назад

Thanks, will do!

@Neodra 10 месяцев назад

Always so much fun when you close the computer and it won't boot. I'm glad you got it working again and I hope that many people will get to play with it.

@tony359 10 месяцев назад

ahah yes, it happens very often! I'm sure the A3000 is going to be under the spotlight for a little while! Thanks for watching!

@aleksandardjurovic4773 10 месяцев назад

Thank you! I enjoyed your video very much!

@tony359 10 месяцев назад

Thank you for watching!

@dazamad 10 месяцев назад

Great repair. I really like the new capture layout too.

@tony359 10 месяцев назад

Thank you for watching and for your feedback!

@genkidroid 10 месяцев назад

Great repair and great video ;)

@tony359 10 месяцев назад

Thank you!

@mikemorrell7921 10 месяцев назад

Thanks for taking us along on this repair Tony.

@tony359 10 месяцев назад

Thank you for watching!

@ayan.debnath 10 месяцев назад

Great Work!

@tony359 10 месяцев назад

Thank you! Cheers!

@marcinmrugala3517 10 месяцев назад

Well done !!!

@tony359 10 месяцев назад

Thank you!

@samshort365 10 месяцев назад

30 plus years ago I read an article describing RISC OS 3 and I was blown away because it was way more advanced than Windows. In fact, I couldn't understand why we all weren't using it. Anyway, I eventually bought an R7500, which incidentally I'm actually using right now, although I'm posting this from phone. Anyway, I like your video as sooner or later I may need to do the same things you just did. So thank you for sharing. BTW, while FreeBSD is my main system these days, I still keep a RPi 400 dedicated to RISC OS 5.28.

@tony359 10 месяцев назад

I agree that RISC OS seems very ahead of its time! But we all know how things work: VHS, Windows 95 etc :) Thanks for watching!

@AlessandroRossineonblack 10 месяцев назад

Well done!

@tony359 10 месяцев назад

Thank you!

@MoreFunMakingIt 10 месяцев назад

Fantastic video Tony! Finally youtube shows me a channel that was made exactly for my taste. Amazing job catching and beating all those faults. Consider me a new avid viewer 😁

@tony359 10 месяцев назад

hey thank you and welcome!

@szogun112 10 месяцев назад

Great work

@tony359 10 месяцев назад

Thank you!

@fronskedeboer 10 месяцев назад

Hi Tony, wonderful and interesting video. When you fixed the HDD, I had warm feelings!

@tony359 10 месяцев назад

Always warm feelings when something is fixed :) Thanks for watching!

@mogwaay 10 месяцев назад

Great video, very interesting repair and well done for getting it up and running again, esp the IDE HD spot, don't think I would've seen that!

@tony359 10 месяцев назад

I was lucky :) Thanks for watching!

@NiTye357 10 месяцев назад

Another great video.

@tony359 10 месяцев назад

Thank you!

@skjerk 10 месяцев назад

Great video! I have an A3010 that I need to look at!

@tony359 10 месяцев назад

Make sure the battery has been removed! I hope you can fix it!

@samuraidriver4x4 10 месяцев назад

Interesting machine and repair. Even if it only was replacing sockets there is still sort of a history lesson in the video.

@tony359 10 месяцев назад

Indeed - but "nice" that something else happened! 😉 Thanks for watching!

@teejmiller 10 месяцев назад

Well that was a fun adventure!

@tony359 10 месяцев назад

Yes, totally enjoyable! Thanks for watching!

@MrKeebs 10 месяцев назад

Amazing video as usual Tony. Hope this helps to feed the algorithm! :-)

@tony359 10 месяцев назад

I hope so too! Thanks!

@samclacton 10 месяцев назад

Great video. Got yourself a new subscriber. Keep it up. 👍🏻

@tony359 10 месяцев назад

Hey Welcome and thank you!

@DigitalDiabloUK 10 месяцев назад

I am always fond of the Archimedes range - it was the computer range in my secondary school education, and my first job was supporting and upgrading Acorn and PC systems. The RISC PC with 486 PDU was brilliant, and it pleases me that ARM continues to this day. Nb you can get a modern RISCOS to run on a raspberry pi.

@tony359 10 месяцев назад

I should try the RISCOS on the Pi, I'd like to know more about it! Thanks for watching!

@winstonsmith478 10 месяцев назад

Very interesting repair. And, wow, I didn't know I2C had been around that long. Looked that up and it's been around since 1982.

@tony359 10 месяцев назад

Oh wow! I had no idea either! Thanks for watching!

@SanelKeys 10 месяцев назад

It was a proper repair video.👍

@tony359 10 месяцев назад

Thank you!

@minombredepila1580 10 месяцев назад

Hi Tony. Have the very same computer, repaired for the very same problem. Thanks for the info on LK5 & D1 (1N4005 I guess), as I wasn't aware. Will fix mine following your guidance!!! It was described in the Service Manual (doh)...

@tony359 10 месяцев назад

So cool that those pads are there for us ready to use! :) Great to be able to help and thanks for watching!

@Sydney268 10 месяцев назад

Hah nice work, reminds me of high school - had loads of these in the computer room, I think they were A3020's!

@tony359 10 месяцев назад

I know the feeling, I had PS/2 at high school and that's why I got one too (also repaired on this channel if you're curious!). Thanks for watching!

@sebastiendumais4246 10 месяцев назад

These Acorn machines were very well architected. Never owned one myself but I’ve seen a few videos featuring them and it’s a pity they didn’t become more popular…

@tony359 10 месяцев назад

Unfortunately the most popular thing is not necessarily the best :) Thanks for watching!

@jorritbekema386 10 месяцев назад

great video as always. Hope you can repair some more computers from the museum in the future. 3, 2, 1, go Tony359!

@tony359 10 месяцев назад

Thank you! One is already in the pipeline, watch this space!

@Archimedes75009 10 месяцев назад

Great vid. The VIDC is also the sound chip btw.

@tony359 10 месяцев назад

ahhh, I didn't know that! Thank you!

@andrewmeikle785 10 месяцев назад

Hi great video, that was my last acorn having owned all the bbc models , now im repairing ps5’s with 16 Gb ram 🤗🤗👍enjoy your videos keep up the good work

@tony359 10 месяцев назад

When you think at 4MB of RAM and compare it to 16GB... mindblowing! Thanks for watching! (also, repairing PS5 is not easy!!)

@SobieRobie 10 месяцев назад

Great outfit Doctor!

@tony359 10 месяцев назад

LOL! Thanks!

@wimwiddershins 10 месяцев назад

We had a few of these in the school lab, they were surprisingly powerful machines, at least as good as the highend Amigas.

@tony359 10 месяцев назад

I can only agree! Thanks for watching!

@bogdanbogunovic3995 10 месяцев назад

Of course we enjoyed it, as always. I wonder if it would be wise to cover the ROM's legs with a thin layer of some dielectric grease in order to prevent the corrosion from developing again.

@tony359 10 месяцев назад

interesting - wouldn't dielectric grease cause conductivity issues? After all it's very low voltage and very low currents. I really don't know, I'm wondering! Thanks for the feedback and for watching!

@Nimmo1492 10 месяцев назад

The computer of my school days, don't see too much about them these days

@tony359 10 месяцев назад

I didn't ask but I don't think they were sold outside of the UK (or not much) so they are pretty mysterious to me too!

@s1mph0ny 10 месяцев назад

Ah the duality of diagnostic repair: find the obvious broken traces and corrosion and also find the stuff that looks perfectly fine.

@tony359 10 месяцев назад

It's never boring :) Thanks for watching!

@whitemark84 10 месяцев назад

my biggest surprise was seeing a Seagate had drive in it didn't know they had been round so long

@tony359 10 месяцев назад

You can find Seagate HDD in VERY old boxes - I believe the one in the ProFile is a Seagate! It sounds like a F1 car! :) ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Vg4yNmrgVn0.html Thanks for watching!

@askoldmodera 10 месяцев назад

wew, that's an interesting machine! Never heard much about it.

@tony359 10 месяцев назад

Neither did I until 3 weeks ago :) I could barely turn it on! :D Thanks for watching!

@darvil82 10 месяцев назад

Awesome video. I love videos where you go figure out what the problem is when it's not very clear. And this one is full of that! Don't get me wrong, I don't like seeing you suffer with computers that are so evil to continuously fail at you! lol

@tony359 10 месяцев назад

ahah no, but it's nice to be kept entertained by subsequent failures! Thankfully they happened one by one and not all together!

@Ironclad17 10 месяцев назад

Lucky you noticed the hdd. It's easy to forget even the simplest components can still have ICs fail.

@tony359 10 месяцев назад

I was happy to see such a simple fault :)

@josejeswin6936 10 месяцев назад

One of the most enjoyable repair videos ever.....i was biting my nails throughout the entire video......How about putting in a 40mm cooling fan?.......😊

@tony359 10 месяцев назад

thank you! Do you think a fan would be needed? I'm not familiar with that machine so I don't know how hot it gets.

@josejeswin6936 10 месяцев назад

@@tony359 i believe its possible to mount a fan....it might get quiet warm since the power supply,the processors and hdd are all crammed into the system case....i am no expert but you can also try some stick-on heatsinks over the main chips...maybe use an infrared thermal camera to identify any overheating components?

@tony359 10 месяцев назад

it would be an interesting project indeed! I'll check the temp of the case next time I'm close to it.

@laurencejohnson4106 10 месяцев назад

Well fettled!👍👍

@tony359 10 месяцев назад

Thank you!

@Epictronics1 10 месяцев назад

Things seem to keep braking until we have a good video lol

@tony359 10 месяцев назад

Maybe, it's just that sometimes things keep braking regardless! :) Thanks for watching!

@tomekrv942 10 месяцев назад

Very good video. Before You opened this FDD I was thinking that there will be rubber belt like in laptop Citizen drives which is always a piece od gunk.

@tony359 10 месяцев назад

Oh it never happened to me, I've only saw videos where the belt turns into goo and I hope it will never happen to me! :) Thanks for watching!

@ULumia 3 месяца назад

ARM1 only used in ARM Evaluation Board for BBC Micro

@alexpinkerton7459 6 месяцев назад

my old computer, and the one I learned to program in ANSI C on

@tony359 6 месяцев назад

it's a very nice machine indeed!

@Dutch-linux 10 месяцев назад

nice video

@tony359 10 месяцев назад

Thanks!

@odette9710 10 месяцев назад

Thank you for the nostalgic video. I had several Acorn machines (from the early Atom up to a two slice Risc PC), The ROM set contains far more than the OS (it doesn't boot from de hard drive just from the ROM) so maybe the rom nr3 contains a part that is only needed for Apps or expansion Podules? I stil have som ROM sets here even with the first Risc OS 0.3

@tony359 10 месяцев назад

Thank you for watching! On the forums they told me the ROM cover the 32bit bus - each ROM is 8 bits. So it's not possible to run the system without one of the ICs as the data back wouldn't be complete. Weird, isn't it? :)

@mykedindeal 10 месяцев назад

Nice

@tony359 10 месяцев назад

Thanks

@KikuVasNormandy 10 месяцев назад

I´m still wondering how that goo reached the hard drive IC, that was weird! Great job!

@tony359 10 месяцев назад

Very weird indeed! Thank you!

@TomStorey96 10 месяцев назад

Man that thing just wouldn't let you win. 😂 It would have been interesting to see the original RTC/CMOS chip tested in the socket just to see if it was really really dead. 🙂

@tony359 10 месяцев назад

Good point! I didn't think about that! Thank for watching!

@TheDigitalOrphanage 10 месяцев назад

Great work and an entertaining video. Nice to see what was happening on the other side of all the WhatsApp messages! Looking forward to the museum visitors using it tomorrow!

@tony359 10 месяцев назад

Really happy to see it on display today! Thanks for watching!

@arnolduk123 10 месяцев назад

At 17:55 looks like the symbol for D1 is a schottky diode. The voltage drop from a standard diode would reduce the battery voltage down to 2.5V so won't last as long.

@tony359 10 месяцев назад

Thank you, I didn't consider that. What is the difference in voltage drop between a regular diode and a schottky? The CMOS takes down to 1V so hopefully it won't make a huge difference. If I see the battery dying soon, I'll replace the diode - thanks for your input, much appreciated!

@arnolduk123 10 месяцев назад

@@tony359 Schottky < 0.2V but regular diode would be 0.7V or more so more leakage current but only a few micro amps. Not a huge difference but considering a CR2032 3V cell is pretty much done below 1.5V. All depends on how much current is drawn from the RTC and CMOS circuit.

@tony359 10 месяцев назад

at 1V it's 2uA.

@simontay4851 10 месяцев назад

Well done with the final repair of the CMOS IC. I wouldn't have known to replace that. Is it an EEPROM IC? It probably can only be written to a limited number of times.

@tony359 10 месяцев назад

Good point - I am not very familiar with the difference but would an EEPROM require voltage to keep the data? This will wipe the data if there is no voltage. The datasheet says 240 × 8-bit low-voltage RAM. Thanks for watching!

@dr_jaymz 10 месяцев назад

Oscillator looks perfectly normal. It will be a sinewave of a few hundred mv around 2 to 3v of dc offset. You won't be seeing a 3.3v square wave if that is what you were looking for.

@tony359 10 месяцев назад

oh no, it was the amplitude which was concerning me. But as you say, it's fine. Also I believe that just probing a crystal will change its shape? Thanks for watching!

@jamesleetrigg 10 месяцев назад

I had one of these at boarding school. I got it with the money I inherited, and when I went to the bank to get the money out, I said have you ever seen so much money to the person in the bank. Lol I wish I had a time machine to go and slap my younger self. Of course they would have 😂

@tony359 10 месяцев назад

ahah for a moment I thought you went to the bank to collect the Acorn :)

@chainq68k 10 месяцев назад

Still watching the video, but lets just comment - the standing RAM chips are called ZIP RAM (stands for Zig-zag Inline Package), and it is period correct for some late 286 and 386 era machines, so end of the 80s, early 90s. It wasn't used for a long time, but it definitely wasn't that obscure. Among others, the Amiga 3000 for example has the same kind of RAM on the motherboard as "Fast RAM".

@tony359 10 месяцев назад

Thanks for adding that to the conversation! That's cool, why Zig-Zag? I've never had an Amiga so maybe that's why I am not familiar with them. (That said I watched many repair videos so maybe I should have paid more attention LOL!)

@chainq68k 10 месяцев назад

@@tony359 Because the pins follow a zig-zag pattern? As I wrote, it's not just Amiga (and even from that, only the A3000 and some expansion cards, I think) use it, but I've seen 286 and 386 motherboards with the same (and compatible) RAM chips..

@foobar1979 10 месяцев назад

ZIP RAM was also commonly used on video cards from the late 80s and early 90s as it gave high capacities in a small footprint making it easier to fit on an expansion card.

@tony359 10 месяцев назад

Now you mention, I think I have a 286 board with ZIP slots!

@tonystanley5337 10 месяцев назад

If you want to get really preventative, you should bake a old board before soldering (24hr at 100C or so). Maybe not such an issue for PTH soldering but chips and SMD reflow can blister if they have absorbed moisture.

@tony359 10 месяцев назад

Oh I know! :) ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-omV1JJqiWAc.html (Old video, sorry for the bad quality!) Baking is key for SMD. I now have a "dry box" were humidity is around 10/15%. I store a board I want to work on in the box for about a week, then I bake it. And it can still popcorn. I envy those who just blast 500C to a random board and claim they never had issues! :) Thanks for watching!

@yogibear2k220 10 месяцев назад

This is the computer I wanted to get instead of the Amiga. This machine blows the Amiga away in every detail (especially the sound,) but it was way to expensive at the time.

@tony359 10 месяцев назад

As I said I am not familiar with the Acorn family but it gave me a feeling of a good quality, professional machine! Thanks for watching!

@skynetcybersystem3tech 10 месяцев назад

👍

@Pickle136 10 месяцев назад

nice repair, do you think it would be worth putting through a ultra sonic to get the small bits of remaining green crud?

@tony359 10 месяцев назад

Probably - I’ve been looking fo a big one for ages but I also have mixed feelings about that. I know some components don’t like that. But for such a damaged board it would have probably helped. Thanks for watching!

@MikesArcadeMonitorRepair 10 месяцев назад

Great job! EDIT: What de-soldering station are you using?

@tony359 10 месяцев назад

Thank you! It's an old Aoyue which I wouldn't recommend to anybody :) The iron is a Hakko clone, the de-soldering gun is a clone of the many available online, nothing special with it and not so great.

@MikesArcadeMonitorRepair 10 месяцев назад

Gotchya. Just seems like it works well. Mine clogs after just a couple uses and it’s super frustrating.

@tony359 10 месяцев назад

Mine clogs too, the cleaning is done off-camera! :D But I believe it's kind of normal for those things. Make sure the gun is fully warmed up as the whole pipe must be over solder melting point. If you don't wait enough, the solder will solidify before exiting the metal pipe. It takes about 8-10 minutes to be at full temperature and I usually keep my gun at 420C.

@mrab4222 10 месяцев назад

You said that it was the first ARM computer released to the public. It wasn't. The first were the Acorn Archimedes A305 and A310.

@tony359 10 месяцев назад

You're absolutely right, my bad! I think in my mind I had the "first ARM processor" but I mixed up! Thanks for watching!

@FireballXL55 10 месяцев назад

Hi Tony @ 6:50 you said inductors, they are actually zero ohm links i.e. a short or jumper link.

@tony359 10 месяцев назад

Thank you! Someone mentioned that - the schematics say ‘L’ so I assumed they were inductors! Good to know if something goes wrong in that area! Thanks for watching!

@FireballXL55 10 месяцев назад

@@tony359 we used them extensively in the 80's when double sided boards were expensive. Because of the body auto insertion machines could handle them easier.

@damianbutterworth2434 2 месяца назад

I used a old phone battery on my A3000. I thought they never got charged off the motherboard. I must of heard a video wrong. I was lucky to not get so much acid on the board. I had to replace the RTC chip to get it to boot it properly. It had been stored in a freezing attic for about 10 years. And the original monitor works ok.

@tony359 2 месяца назад

it's been a while but I think I had 5V at the battery connector? I cannot remember if I checked or just trusted the schematics! :) Great to hear the monitor also works!

@damianbutterworth2434 Месяц назад

@@tony359 I`ve put a proper RTC battery with a diode in mine now. Yes there is 5 volts at the battery. I got a RGB to Scart cable to use the old TV but it`s just a white blank screen. Works ok on mono cable. I wonder if I need to put voltage into scart pins to get the TV to turn on RGB.

@tony359 Месяц назад

@@damianbutterworth2434 If I remember right the Acorn is a... analog SCART? Or digital? One that doesn't work with the more common scart. Like the Amiga maybe? I might be mistaken though. Did you check on the stardot forums?

@damianbutterworth2434 Месяц назад

@@tony359 I`ll keep trying mate. Thanks for the reply. I`ll search stardot now.

@drewgarrard7228 10 месяцев назад

you can also use a capacitor as a replacement for the clock battery... have done this a lot on fruit machine boards...

@tony359 10 месяцев назад

Some devices I work with have the ‘super capacitor’ - wondering how long it would last and how much it would cost? What capacity would you recommend? Thanks for watching!

@drewgarrard7228 10 месяцев назад

depends on the current draw of the cmos... voltage wont make much difference..and a bonus is a capacitor obviously is made to accept and deliver current so can be recharged while system is on@@tony359

@tony359 10 месяцев назад

data retention uses 2uA at 1V which is the minimum the IC can work.

@drewgarrard7228 10 месяцев назад

ive used these before KEMET 1F Supercapacitor FY 5.5V dc obviously higher than the 1v minimum (3v cell) but if cap isnt working at capacity itll hopefully last longer..@@tony359

@tony359 10 месяцев назад

it's an idea indeed. Thanks for that!

@AdamBouzaneOfficial 10 месяцев назад

use white vinegar to neutralize the acid from the battery. that will chemically remove the residue better then iso. use iso after to clean the neutralized brine.

@tony359 10 месяцев назад

Thank you! It was done before but I did give it an extra wipe as you say. Thanks for watching!