Technics SU-V90D Amplifier Service & Repair 

I want to try something new. Something more live. So I’m running a 3-part live workshop that takes us on… A Time Travel Through Vintage Electronics. We’ll rewind the clock, dive into the tech of the times… (and study the very history of how things were broken and repaired has evolved) From the 1950s all the way to 2020s. It's still just an idea. The dates and times are to be confirmed. But if you're reading this, then the workshop hasn't yet taken place. So if you're interested and don't want to miss out, you can sign up here: menditmarkk.ck.page/6e8fbd9521

Mark laughs every time a problem is encountered, problems seems to give him joy. I would love to give him my 1990s Philips DCC which has given me everything but joy since the warranty expired.

The Bob Ross of electronic repair!

You are a genius! I have never seen such a modest person! Loved the whole video. Your happy attitude and even when things went wrong, you never gave up and knew exactly what to do. Fantastic video!

Just found this channe. This bloke is a bloody genius tbh. He gets down to the job & bloody well gets on with it. Puts the yank repair bods to shame. No endless waffling & snail slow repairs here at all. He is so cheerful, even when getting electocuted!. Thanks Mark. Keep up uploading the great videos.

This is how the eevblog repair videos SHOULD be. What can we say about Mark? He’s an extremely competent and entertaining man. I love watching him work. You’ve a new subscriber Mark.

Easily my favourite new tech channel. I could sit and watch these for hours. Probably, like many others watching, I love how other engineers go about their fault finding & repair. It's also great to see how other bits of kit break ! Great channel. Thanks for putting the videos together Mark 👍

It is so enjoyable to see that others are also doing mistakes like erasing some labels or forgetting something and having it disassembled again 😀. Thanks for this shots! It makes me feel better 😆

These are so compellingly watchable. I love them. I enjoy fixing my own stuff but I don't have much expertise in electronics. I can usually tell a capacitor from a diode from a transistor, I can fix a dry solder joint, and I can fix some mechanical issues but that's pretty much where it ends. So it's brilliant watching someone with so much expertise and experience who can generally fix ANYTHING. And his ability to clearly explain what he's doing, his wonderful sense of humor, and his modest demeanor are icing on the cake.

Wow. I am very impressed with how you fixed the missing button labels. That is classy work indeed!

That amp needed a lot's of love, glad it got serviced/repaired instead of being thrown in the trash. Hopefully it will keep working for years on.

I actually miss doing this kind of work. I was a radio and television technician for many years. Troubleshooting down to a component level.

One reason this is my new favorite repair/restoration channel is because "good enough" usually bothers me. :P I was a bit worried about how the labels were going to turn out based on what I've seen elsewhere, but they turned out looking pretty damn near professional.

This Guys is Extra , il répare tout ce que moi je trouverais désespéré..lui il redonne la vie à n'importe quel appareil ...👍⭐️⭐️⭐️⭐️⭐️

You just can't have it unfinished, can you Mark ? Them stickers on wiped out text was an awesome effort. Best part of your videos is not taking yourself seriously but taking the job seriously. Just love the way you do the job. Bravo

I really missed such videos. It reflects such dedication to canabalising spares and restoration. Did lots of Grundig / Sony spool players, VCrs upto DVD. I was a radio TV technician attending on site in Mumbai India 🇮🇳 1974 to 2015 LED/LCD took our jobs away.

Hello Mark! The Circuit Board Plugs: J15 and J18 don’t need to be such a problem. You simply push down on the top of the plug assembly and then pull out the wire cable. 😂

I love how you put labels back onto stuff, ....bloody marvellous!!!!!!!!!!

What a skill! You are genious, Mark. So impressed. All the respect from Japan.

Mark I still wouldn't signed somewhere Your videos are my most watched. I watch you all the way to the Czech Republic. Thanks to you.... Thank you

I admire you ability to make the diagnosis and repair of these units. I would not even attempt to duplicate your abilities.

excellent video Mark. What program did you use to design those labels? Could you please do a video showing how to do this? I think this would make very interesting video and interest a lot of other people.

आपली साफसफाई यंत्रणा, पार्ट PCB मधून बाहेर काढणे , साॅल्डर यंत्रणा, टेस्टींग यंत्रणा फारच सुंदर आहे.

I truly admire your humility and good nature. 😊

Hey, Mark, I think some of your repair bench setup ideas are great! 👍😊

20:30 very useful suggestion, thank you very much! I just fixed an SU-V660 with this exact problem. Two transistors were loose, "same" part but in two different spots: it's probably due to the components more than to the soldering job. I guess the terminals were dirty when they soldered them in, maybe a bad batch or bad storage. I've inspected all the boards afterwards, and those 6 joints were the only loose ones. Oh, and the front panel was _filthy,_ but I cleaned it with dishwasher soap after seeing the foam disaster O_O. Thank you for showing us what to do and what to NOT do.

Mark shapo a great work and cleaning. The owner will have it a long time without problems. Greetings from Germany Berlin.

Great work. You must be the most cheerful technician in the world ;)

Fantastic work! Your a very happy man. One thing you need to watch not to mar any of the front facia or plated casing as once scratched you can't replace like the electronic parts. Make sure you always put something soft down before you work on this stuff or you'll get a unhappy customer.

This man's talent knows no bounds superb episode.

You can service my 1973 Technics amp any time. You go the extra mile. Excellent work.

Sar you are a super man in electronics reparing I like your work God bless you I am from India prabhat kumar Jai hind sar

Another beyond economical repair session. You provide an unquantifiable service for there is no way all of us will ever get to see such competence and skill in the real world. And all for bugger all. Thank you Mark. You also show the frustrations and not just the solutions. This Technics is a horror story. It is extremely unlikely any sane person would bother repairing any Amp with so many failed components and dry joints. But you show it IS possible, but not really worth it.

A joy to watch-the master at work!

Had no idea you could clean boards in ultrasonic. Love your channel, cheers from the U.S.

This man is a electronic genius. Good job mate

Mark, you are without equal! Extra gold star for the Carol Vorderman reference! 😍😍

such a nice and thorough repair - and such a shockingly bad PCB full of broken joints! Thank you! I admit I screamed at the screen a bit when you yanked off those connectors: those are (horrible) spring loaded ones. To remove the flat cable you press on the tab to set the wires free. Thankfully the PCB was poorly made and the solder failed :)

Good recovery with the labels at the end 👍

Another fantastic video, there’s something very calming and relaxing about watching you work on the kit you receive along with your perpetual happy demeanour and charming presenting style.

You are SO GOOD at what you do sir, it’s truly amazing. You are the best electric guy that I know of! Keep up the great work you do sir. I love watching it.

I've been a professional electronics engineer / electrician for 38 years, and you are an inspiration, Mark. Your attention to detail, professionalism and ''out of the top drawer'' work is awesome to watch. If I did what you do, my videos would sound like they are going out in Morse Code due to me bleeping out all the swearing. 😆

I had a run-in with foam cleaner and some plastics back in the 80's when I worked in a Technics dealership reapairing these very amplifiers. It is pretty strong stuff and best kept for bare metal. Lovely job on the legends and cracked solder joints galore of course. TTFN.

So smooth, so confident and always with a smile on his face!!! That's a pro!

watching you rip them plugs out at the start from the board was nasty! They only need pushing down at the back ( keep it held down ) then the cable comes out 😂

What a pleasure it is to see an expert at work and having fun too. I agree with his brief appraisal of Technics amps tho' they were well built. I preferred British amps Arcam, Rogers, Sudgen, Quad, Naim. There were once many brands when we had a proper manufacturing base.

If you are gonna do it, you might as well OVER DO IT! Congratulations on your craftsmanship Mark! 🎉

Mark, you are the man. You do an outstanding job. I just keep on wondering........ how do you make a living on this......... And also, please don't ever stop doing what you do.

One thing I really like about you Mark is you don't replace components for the sake of it. If electrolytics are in spec leave them be. It's rather like the British approach to classic car restoration ( preservation) where the Yanks just replace everything.

Thanks for the video, your a very skilled guy. That was a huge amount of work, hope the owner pays you well, certainly well deserved

Excellent attention to detail! Nice job 👍

Beautiful job Mark. Thanks for sharing.

Excellent work, very nice channel, I'm impressed at your patience, and quality of work, not to mention all the amazing test kit and tooling that you have, really great :) thank you.

Mark, you are awesome! I wish that I could have found someone of your talent, work ethic, and professionalism when I decided to get rid of my stereo system. I purchased several thousand dollars worth of equipment in Japan while assigned there with the USN 7th Fleet back in the very early 80s. Probably my favorite was an Akai 747dbx reel to reel. Side note..I had 15hours of The Rolling Stones on reel and almost as much of David Bowie! Also two different Nakamichi cassette decks and a lot of Bose speakers. Why I got rid of it all is because I couldn't find someone like you. Dammit!

Mark,you are incredible,pure joy to watch,-great knowledge

Beautiful work on this unit! I like how you did the labels on the front! Steady hands and presto all new again!

Your skill and your always positive way of dealing with the unexpected is impressive! All my admiration from Italy.

I clean the front of my hi-fi devices with water with a little bit of liquid detergent with a soft cloth and a small paint brush. Till now never loose any letter😄! By the way that was a very nice job and the labels turned out very well.

im a big technics fan and just serviced my amp, brilliant job, really impressed by your commitment to details on the front panel text

nice amp ,those toshiba transistors were top of the line back then. also, i had experience with those weird connectors, you must push the plastic down to release the cable.

I've learned so much from repairing jobs and you're a nice friendly guy

Just found your videos. I love repair videos and I love your happy attitude. I wish I knew people like that!!

Your smile and hard work leaves me smiling!

I really enjoy your videos Mark. Thanks.

Thanks for these videos Mark. It's great to see how you deal with things when they go wrong, because lets face it, things always go wrong.

impressed with the decal print, top job.

Quality repair, such a high skill level and attention to detail, a joy to watch a true craftsman

That is one classy restore of an amp that had a lot of hidden problems. Well done! And those labels: awesome! Thanks for posting.

I love the upside down speaker to hold your screw driver bits. Great video journey this time.

Brilliant channel Mark, really enjoying the content. I'll have to look you up as I have some old Technics stuff that needs work, nobody local to me interested which is a shame. Love the quality of your work as well.

Amazing electronic lab.You are special electronic engineer. BRAVO !!!!!!

Awesome videos -- lost count of how many I’ve watched this week. This is How It’s Made version 2.0 😊

I appreciate your honesty keeping in a mistake (button caps). That is exactly what happens when you work on all kinds of equipment. Thanks!

What can one say? The printing job you did for the front panel was outstanding. Another great video.

Just fascinated with you and your work. Great work!!!

Mark ,you are best ,wish you were nearer in South Africa

Enjoyed this video and your attitude towards the work.

Loving your ultrasonic cleaning swamp!

Well done Sir, what a journey, but the end result speaks for itself. If people are tempted by older gear, they really do need to sit down and watch what is involved, and you must have a positive attitude as you display to tackle the challenges that will inevitably get thrown at you. I look forward to more content from you, maybe one day you will feature something I have or would like to have.

AMAZING JOB, AMAZING ATTITUDE! so nice to watch it

Attention to detail is AMAZING! Just subscribed.. looking forward to trawling through your back catalogue!

I have to say, you're a genius! Wish you lived near me as I have a Technics amplifier, radio,twin tape deck combination which needs attention to the tape decks,circa 1990.I like how you check the rest of the equipment out aswell as the actual fault. Great to see traditional service!🙂👍

i love all from technics it makes me feel great to see you repair that beautiulful piece . great job

This is a great channel for a few reasons.

Great Job.. really good job, Cheers to you from a viewer in the US. keep the Videos coming

It really is a pleasure to watch and listen to mark always so happy pleasant and fun, keep up the good work buddy great channel ! 😎😎😎

Incredible repair well done your channel is brilliant thank you

I did the same thing as you 20 years a go. I am amaze of the professionalism and passion here.

That intro with the door opening always cracks me up 😀

Your setup is just great.

The labeling was a really nice finishing touch. As ever, a thorough and excellent job! I have yet to see you stumped. Makes me think of my 1969 Sansui 5000A I got in Japan.

I had a Technics SU-V1X amp from about the same era, so called "new class A", and it started playing up. It was so horrifically awkward to get apart I actually gave up, and got rid of it. Really enjoyed this repair video!

congrats! love your work & attitude!!! ❤

Excellent vid yet again! Love Technics gear

You're a better man than me...err, all of us, Mark 😊 I usually avoid any item used in a long term smoker environment.

I enjoy watching your videos and interesting repair. Nice save with the new button labels at the end 👍

this was awesome - loved the way in which you solved each and every issue. you certainly know your way round electronics like a Master Electrician. Great content entertainment - this channel is another You Tube Hidden Gem!

Wow - that was a ton of work Mark!

Outstanding effort!!!!!!!!!!!!!!!!!!!!! Well done!

Mark ještě bych se ne ěkde podepsal Tvoje videa jsou moje nejsledovavanější.Koukám na tebe až české republiky.Díky tobě....Děkuji