Fixing & Servicing a BBC Micro Power Supply after the caps explode!
ฝัง
- เผยแพร่เมื่อ 15 ต.ค. 2024
- Join me as we repair and service a BBC Micro PSU that has let loose the "blue smoke" when the Rifa X2 Suppression capacitors failed. This video is sponsored by www.PCBWay.com!
As well as just replacing the RIFA X2 Caps, we also service the entire power supply, using a high quality kit from www.retroclinic... - We go through the entire process so that you can do it too! The RetroClinic kit advanced servicing kit gives the PSU better smoothing on the -5v line and is recommended. If you just want to change the blown capacitors then there's a smaller kit for that too!
Buy a servicing kit at : www.retroclinic...
Get an SS02 Solder Sucker here: amzn.to/2ZpVa4w
Get the Topnik liquid No Clean flux I used here: amzn.to/3bR62xE
Get a desolder station like I use here: amzn.to/3iyi4i1
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BIG THANKS to my Patreon Supporters who are mentioned in the video. If you would like to help fund future videos, I would be really grateful. Visit / markfixesstuff for more details.
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Music courtesy of TeknoAXE - teknoaxe.com/
Great video! An excellent compliment to the printed instructions, thanks!
RetroClinic thanks mark and thanks for providing such an awesome service at www.retroclinic.com !
Does not help me.none of my channels come on just saying
No signal and we have followed your instructions!!!!???
Please help !!!!!
Please can I speak to someone urgently!!!??? Call me asap!!!
What shows no signal, your display? Does the computer power on?
What shows no signal, your display? Does the computer power on?
What shows no signal, your display? Does the computer power on?
Rifa madness.
Carry On Capping... Nice one mate, the soldering close ups were excellent... Cheers...
Not an innuendo in sight, apart from when you got your large pair out. Great video as always
Cheers Dev you Legend!
Your videos are so informative. The fascination of seeing the solder flowing. The close-up vision is excellent with no focus hunting and crystal clear images. Even with magnifying head band, I don't think I can see things that well in real life. 😊
That was a great video, Mark! Particularly liked the close ups on the soldering/flux. Very informative!
Rich Kearney thanks mate. I try to shoehorn something useful when I can.
RIFA madness!
Always worth a watch, you got me spontaneously laughing again with the subtle innuendos 😆
I never did nuffink guvnor
When you've soldered in the replacement components, always make sure you have soldered ALL the legs. I made that mistake re-capping my Freeview power board. Oops. :) Great vid as always, Mark.
It's very easy to miss solder points when you have lot of components to do. I always double check my work. Thanks Franko!
thanks mark for this guide it really helped
Great news!!
Thanks 4 this Mark just recaped my 1st power supply this was a great help.
Excellent! Well done!!!!
loved the the humour, innuendos very good detailed video. 1 thing you missed or didn't show was checking the input fuse. its not so easy to get to when the PSU is re built. if components have gone bang usually the fuse has too.
That has genuinely not happened to me so I missed it! Now you've told me I'll look into covering it when do more BBC stuff. Thank you!
Thanks for the reply used to work as a IT technician in schools back in the day your video took me back down memory lane had quiet large networks of BBC Arcamedies,Atari ST,mainly for music and a couple of separate PC networks Which was my specially Domain cut my programing reverse engineering on the Beeb also did Z80, Motorola 68000 on Amiga,Atari etc moved away from education sector into PLC automation eventually setup several companies and teaching computing and networking amongst other stuff enough of my old codgers rambling thanks again for your videos
Nice. Had to do mine in November 2019 when it went up in smoke. Can't recommend Retro Clinic enough, Mark is very helpful. Their quality brand capacitor kits are cheaper than you could put together yourself so not even worth thinking about spending the time.
I couldn’t have said it better myself.
Good to see you back broski missed you being around !good video!hope you are well !
Hey bro. Hope you are ok over there?
@@MarkFixesStuff As much as possible with all crap going ove rmate i manage some rl things not so pleasant happened as well and yeah but i cope
I've always enjoyed fumbling with my nuts in the dark 👍.
Great video mate
Cheers mate.
Hi Mark, great video thanks. Is it the same procedure for Master 128'?s Also....the amount of cheeky innuendo makes me think this should be called "Carry on Soldering"
If not exactly the same it’s incredibly similar
Don't fear the RIFA.
Great video, I learn so much soldering from your videos. not so sure of the new intro I really like the older one but hey might just be me not liking change at first :P
You can always watch the old one on an older video I guess. Loads of people were clicking away halfway through the other version so I had to do something really.
Thanks for the kind words by the way :)
@@MarkFixesStuff sounds like a plan watch old intro right before every new video ;)
Kimming yes please. It’s all views 😂
Ive just done 3 of these. Was recently doing some work for a school, and they said they had some old scrap computers if i was interested. I was expecting some old junk PC''s. But no, it was 3 BBC Micro B's. In really good condition too. So have refurbed them, and cleaned the cases. Now they are worth over 300 each.
Well done on the rescue!
Where did you get the music from? An episode of Bergerac?
Retro Factory close... Hettie Wainthropp Investigates.
Hi, Mark. I very good video especially for someone like me who is about to try and do this for myself on my 40 year old BBC Micro! Can I ask what temperature the soldering iron should be set to in order to melt the solder on the board? Silly question I know, but I am about to buy a soldering iron with a digital LCD display and I don't what what to set the temp to. Thanks in advance!
Hi Rupinder! First of all, thanks for watching! As a rought guide I have my iron at about 330 degrees Celsius, so between 330c and 350c for most normal soldering jobs. Good luck 🤞
RIFA... Making the PSUs smoke since 1942.
So true... and smelly...
Do you smoke, fool?
No I Don't
Me Neither, I don't smoke cigarettes, I don't smoke cigars, I don't smoke a pipe, pipe, pipe, pipe...
I DON'T SMOKE DA RIFA!
Deep belly laugh at this. Thanks hahah!
@@MarkFixesStuff My pleasure, sir.
Thank you for the recommended the repair on the power supply. After changing those capacitators and when I tested those 5V ouput pins it turn out to give a 10V supply. Can anyone help me if you faced such a situation and what is your recommendation for me to do next. I dare not plug it to the main motherboard board yet. Thanks please advise.
I will never forget the smell when my BBC PSU went pop. The stink would not leave the house for days. My Mrs was not impressed
Pretty impressive stench!
14:45 Too low temperature, it takes forever to heat up. Also, the way you're holding the soldering iron is focusing the heat transfer to the component leg, should focus on the pads with huge thermal mass instead. The leg itself has much smaller thermal mass and is easier to heat up than the huge pads and traces so I'd turn the tip around so the flat part is touching the pad. This way you'd heat both much quicker.
If you want Mark to understand, you need to brush up on your innuendese (the language of the innuendo tribe from which Mark hails). Let me help you translate:
Mark - you need to get your iron hot, hold it tightly in your hand, and slap it on the leg. While you're prodding around, give extra attention to the massive pads and touch them with your tip.........
@@andypyne lol ok...
Mark: More fire, flat part down, tip also touching leg. Meat cooked sooner. :)
WHY ARE YOU TOUCHING MY TIP!!!!!!
Thanks for the advice. I’ll have a go at it next time.
Is there an innuendo bingo card for this video?
I have no idea what you mean...
22:15 star washers on the case side? really?! I realise that they were that way when you removed them but that is not how star washers are designed to work. Their purpose is to stop the nuts from vibrating off by applying a springy rough surface to stop them from turning and so need to be directly in contact with the nut. Was your PSU originally assembled incorrectly or do the Retroclinic instructions also recommend this bad practice?
All the Beeb PSU's I've come across have the star washer located here Mike. I realised it's not the norm, but eventually figured that there must be a reason so I replaced them in the same manner as they came from the factory. I even did a bit of research on google looking at other people's PSU photos and the star washer is in the same location with all these chaps.
blog.tynemouthsoftware.co.uk/2019/06/bbc-micro-issue-3-model-b-repair.html
wouter.bbcmicro.net/bbc/hardware/bbc_micro/repair/bbc-ps-c2-1.jpg
coolnovelties.co.uk/downloads/BBCcapkit.pdf
www.picuki.com/media/1971539650564709738
It's an interesting point and one that I'm glad you brought up because I find it a bit odd myself, especially because they had clearly had tons of threadlock resin to hand as well. I was wondering "what is this actually doing?", but in the end history won.
BTW, Retroclinic do not specify the washer location at all, and all methods in this video are my own.
Thanks for watching the video. Do you have a PSU you can check?
@@MarkFixesStuff Thanks for a quick and comprehensive reply. I did wonder if it was the norm for Beeb PSUs. I guess the practice was introduced at the design stage somehow and no-one picked it up. Since Beebs tend not to be used in high vibration 'safety critical' locations (e.g. aircraft etc.) they probably aren't needed anyway. Just think of all the star washers they could have saved if they had just not used them :) I wonder what the British Standards regulations, that they were certified to, actually have to say about them.
I do indeed have a couple of PSUs that have been 'in storage' for 20 years hence my interest as they will need recapping once I can reacquire them. I'll try to remember to let you know when I get my hands on them.
@@MikePerigo I actually thought it was "just me" wondering, hence my searching. I suspect in the 80's with only postal mail and no access to social media, things like this were just overlooked and never even noticed by BSI.
mind you, regardless of the washers, the units have lasted thirty years. Not too shabby. I bet my LCD TV is well banjaxed by then.
Tune 😎👍
Are U from Poland? bc this flux is :)
No, I am English but love this flux.
Soldering pr0n 😉
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