Technics Amp repair with NO PARTS!
ฝัง
- เผยแพร่เมื่อ 15 มี.ค. 2023
- UPDATE:
I’m running a 3-part live workshop that takes us on… ’A Time Travel Through Vintage Electronics’
We’ll dive into the tech of the times, from the 1950s all the way to 2020s.
The dates and times are still to be confirmed. But if you're reading this, then the workshop hasn't yet taken place.
If you're interested and don't want to miss out, you can sign up here:
menditmarkk.ck.page/6e8fbd9521
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Mark fixes a Technics SU-X502 Amplifier with no output. Nothing wrong with the components... Just a little touch up here and there. Doesn't take too long.
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
This is quickly becoming one of my favorite channels. Between Mark’s good natured disposition and the wealth of knowledge he has in troubleshooting and repair, it’s a winning combination for a great channel!
Couldn't have said it any better!
So relaxed and informative. A winning combination. Dave Jones must be rolling in oscilloscopes, his output is BORING. 🥱🥱
@@proluxelectronics7419 😂
What spray do you use in the end of video?
I know next to nothing about electronics, but there's something so appealing about Mark's videos that I can't stop watching. Can a 64 year-old like me learn a new trade? Mark's videos give me hope. 😀
This has to be the happiest man on TH-cam... Love it.
Just a quick word to tell you how contagious your "always happy" attitude is Mr. Mark. I always come away from watching your repair videos with a smile myself. Thank you for that!
I am in France and unfortunately people are not interested like that in repairs. I am passionate about this and I want to show you my respect for your skills and your patience.
You are meticulous and in addition always have a smile and a good mood.
Long life to your cat which brings even a little more happiness
Hi ! I'm from France too, and i don't agree with you, because in france we have ''repair café'' to repair every thing, and we have a lot of people interesting with that ! just for information , regards, and congrat to this guy for showing how to repair !👍
@@jeromelefevre8000 hello, vous pouviez aussi le dire en français puisque c'est notre langue 😝 😝
Sounds like it would be a good place to open up shop.
Here in the USA, there are basically NO electronic repair shops existing anymore. Once the word got out that I repair electronics, I have so much work that I could quit my day job, and support myself with electronic repair only.
There are still plenty of people out there with expensive pieces of electronic gear that they would like repaired.
I use a great hifi repair shop in Nîmes. So far they’ve been amazing
Hi from Athens! There are still electronic repair shops, which most are in industrial places, there’s a shop in north Evia that repairs and sells collectible old tech.
You have earned my subscription for being such a happy chap. You're rare because you can laugh during your videos without sounding like an uncomfortable boob. It's content worthy of my viewing time.
I totally agree with you. Mark mends it with smiles for miles.
I bought one of these last week as not working with no outputs but i noticed the links were missing and remembered that mark said about it nor working without them. I got a right bargain as it works a treat with a couple of leads instead of the links. Thanks Mark.
nice!
Nice to see a fellow electronic engineer doing their stuff on't net.
Must admit to a bit of tool/equipment envy!
👍👍👍
Absolutely test / calibration equipment envy... 😊
You will suck his tool.
There’s a repair guy like you I came across in Leicester. Fixed an old Bowers and Wilkins Subwoofer I’d bought off eBay. Fascinating watching him take the unit apart and diagnose the fault. He fitted a new speaker drum to replace the blown one and away we went. Now happily sitting next to my TV pumping out the base. Great channel by the way.
Hi Mark, I'd like to improve your solder sucker performance. Stretch a 3mm internal diameter neoprene cable sleeve over the plastic intake end of the sucker so it protrudes about 3mm. This improves suction and also protects the plastic tip. Worked for me for many years when I was in the trade. Btw, it also stops the sucker pulling tracks off!
Excellent diagnostic and repair in a friendly workshop which is very well equipped
00:34 _"It's got a digital input for added trouble!"_ 😂😂 Never a truer word spoken Mark! Great vid as usual matey :)
Are thy common to fail or something? The sound quality difference between analog and digital is huge on my amp. So much crisper with digital.
@@proudofyourroots9575 maybe you´re hi-fi equipment is unique, or you don´t have a good analogue source to compare it ,as an example i restore 3 of my old decks and i remenber when starting to win more money i bought for the first time a black component stereo system ,i first invested in a ES system from Sony this because since 76 i had been using everything in light grey or brushed aluminium and i already had a pioneer PD-7300 cd player bought in 87 (i think)and bought the most expensive and well talked about cd player from CEC(chuodenki) a belt driven cd player but when i recorded from cd to a TC-K909ES cassette deck, the cassette ,a tdk sa-x it sounded better than the source also my old turntable was really good sounding a PLC-580 from Pioneer and invested in some pair of huge speakers from cerwin vega made of wood with a lot of veneer (believe it or not the red menbrane in my two woffers didn´t rotten as in all cerwin vega speakers i saw from the regular series) ,they cost me at the time each,what today is 1.000€ and a bit more ,the convertion is not perfectelly done, this to say that my 77 turntable and my deck ,modern at the time and high-end of Sony in rock music or music with guitars the cd always cuts the vibration of the guitar chords, the amplifier was a TC-F690ES(or close to it) from early 93 which ,don´t know the reason why ,only in Portugal and the U.K. were sold with two huge power transformers and two also big capaciteurs, the sound was really clean but digital wich i had a DAT deck after the reel to reel deck it was the best recorder i remenber having , the cd player also with lot´s of cds sounding perfect ,not those analog freaks that analog is the best and always buy vinil . well i do have around 9.000 LP records but also have 4.000 compact disc , and what i like is to hear musique with quality ,that i already had in my 76 system but so tired of looking at it, allthough everything works today with perfection , i arrived to the conclusion that digital is in a good path but not evolved as the analog , one can have a complete digital system but the sound is always analog or we wouldn´t listen to music but the sound that the spectrum 48K used to do when charging a game, i believe in you but maybe a singularitie , i can add that some of my friends have expensive cables from rca to optic fiber to conect digital or analogue source´s but it´s weight it broke the digital input on their amplifiers and i use a section of cable tested and proved that it´s the best cable for processing sound but not with a heavy protection, kind of regular cables with a bit more thicker copper cable. Today i record cassettes again. I found around 8 boxes of 10 cassettes from TDK most of them SA-X but also have SA ,CDing type II ,AD-X type I and D also type I and either than my sony deck i had a CT-959 from pioneer and a DRM-800a from Denon, and i make compilations and they sound so good ,even the minidisc that i have 3 decks seems always the same sound but good ,i also bought boxes of 10 minidiscs from TDK when minidisc in my country failed to atract the consumer, so there are good analog sources or maybe all and some digital sources to, but limited to some weird sound of the guitars that when listening to the same LP in a vinil record it sounds like a real guitar, like when we play at home ,with digital is not possible but each own to it´s own ,if one is happy with what he has one shouldn´t look for better, regards
@@RUfromthe40s jesus christ man, learn to communicate on youtube. Writing essays no one will ever red. LMFAO
Only time analog sounds better if its an analogue instrument.
Any modern recorded media goes through a DAC. Theres no pure analog.
@@proudofyourroots9575 No, they are not. It was just a humorous statement. Digital audio is very reliable.
if i could diagnose and troubleshoot like you i would be smiling all day too. love those vids
I enjoy watching your videos for the good camera angles, expert repairs, and good humor. Keep up the great work and thank you for sharing your work.
The ever present factor of 'dry' solder joints has always surprised me. But easy to fix, if you know what to look for.
I believe this is a remnant from the 90's, when the first RoHS compliant solder was introduced. You had the same with automotive components. Especially those that got a lot of heat cycling, like ABS-modules.
Yep. The switch over to lead-free solder was to blame for most of this.
Thanks Mark, I enjoy seeing you cheerfully fix the components. You did a great job on this one.
I’m loving your channel Mark, fascinating and good humoured. I’ve watched nearly all your vids in the past few weeks and so loved this new content. More please!
Another great video Mark. Always a joy to watch you fix stuff!
Just discovered this channel, really like the knowledge, with a positive attitude, a smile and some humour! That is rare nowadays!
iv watched a few on here now, such a great channel. It's clear Mark has great experience and knowledge, he isn't afraid to tackle anything. It's nice to know theres someone to keep my old hifi going (if it breaks). Best wishes everyone.
These vids are so satisfying to watch, I could sit and watch these all day long. This channel deserves a lot more subscribers!
Technics from that era... no no NO! Nice job, Mark. Thanks.
Bravo Mark! Saved another unit from the recycle bin. I'm so happy for you that you enjoy the work you do and you are so good at it. Someday, I hope to be 1/10th as smart and useful. All the very best.
... I'm so glad, Mark, you use brass wool to clean up the tip of your iron ... shock with cold and wet sponge was wrong from the beginning ...
As an analog hifi nerd, I enjoy reviews of old equipment and repair, but casually. After I saw a video of Mark lathing replacement buttons, I immediately subscribed. The level of detail and the nice, low key approach of these videos are superior to anything else I saw. Thanks for your content, Mark.
Fantastic video Mark as all of your video's are, you remind me of myself about 30 years ago. I started building valve amplifiers for my disco when I was at school in the late 60's but the went onto RF and audio engineering up until now. Keep up the good work as you do some of the best repair video's on TH-cam as they are informative and very entertaining. 😀
I had to do that with a friend's Kenwood receiver last year. There was no audio and once I re-soldered the cold joints, it worked perfectly. Thank you. Yours looked more cumbersome to come apart but doable. Great job!!!
I always impressed by you going straight to the issue with no diagnostics, that's so cool.
The magic of video editing
This channel is fantastic! Really entertaining, and just so easy to watch. Thanks Mark!
Straight on to eBay, bought one for 32 quid, same dry joint issue, now working. Keep it up, Mark. Made in Japan audio gear rules
Hello. I love watching you repair electronics. You smile and are happy every time I see you on TH-cam. 👍
thanx for those it is like doing a course. I am all thumbs myself. Never did any workshop /electronics /electricity at school was all lit and art but now in my 60s i am trying to use many old 70s 80s 8-Track players tapedecks amps so your info here is GOLD .... and to see it done by a guy who knows what he is doing ..... inspiring .... THANK U
After seeing a few bodge jobs at my local repair cafe here in Dorset, I really wish you were closer Mark, I have a lovely Sony minidisc deck which has recently refused to switch on and just makes weird noises instead, but that’s a fair old journey up to your neck of the woods….But there’s no one I would trust more to repair it for me….Love watching you work buddy !!!!
Mark you are the best l've seen with excellent vid and commentary of a repair! Step by step breakdown, awesome!
Excellent, I've repaired a few of these, and I owned one of these complete systems in around 1992, it was ridiculous it had about 6 components I think. Turntable, CD transport, tuner, amplifier, graphic EQ, twin cassette deck, and of course a NICAM TV connected up, with a JVC VHS and a Pioneer laserdisc :) all good fun. Love your videos Mark, and love your workshop! Used to work for HP and Lecroy T&M so love all the test gear. Many thanks
lol im running that exact setup (minus the TT). Mine is the g91 from 1991. Everything works flawlessly, except one of the cassette decks. This deck fortunately isnt one of the cheapo models they produced just a few years later
(so its worth fixing). I think i saw a receipt for the set up and it was around $600 (on sale) and that included speakers in 1991. The guy i bought it from barley used it. I got everything for about $80 about 10 years ago.
I stumbled across this channel, an really enjoying your straight forward presentation and troubleshooting technique.
Nice one Mark, always good to watch a professional at work. I might have another little job for you soon 😎👍
Why have I only just discovered this channel?!!! Fast becoming a fave. Well put together vids and very informative. Must confess to a bit of workshop envy. Wish I had space for a similar setup. Nice easy repair done here. I hate the early lead free solder stuff myself. Do have a substantial amount of old Technics gear. Generally decent to work on.
It's very entertaining to watch such a cheerful fella at work!
I see on your website that you also repair vintage computers. It’d be great to see you tackle one in a video the next time you have one in the workshop. I love your videos. Such skilled work and always undertaken with a smile; I wouldn’t be surprised if you don’t get The Repair Shop asking you to do fixes for them.
LOVE your videos, I see you're almost at 20k subscribers, I see you doing really well and getting a lot more in the future, thanks for the great entertainment.
Hi Mark i am from Buenos Aires Argentina. I cannot stop watching your videos. I learn every time, i am an electronic tech too, but i work on another stuff, i wanna thank You for sharing Your knowledge. Regards
what an eye for dry joints! and an able hand with a bit of solder as well! Thanks Mark
Those dry joints were so obvious, I spotted them easily. Got to love easy repairs like these!!
oh my god, i just discovered your channel but i am so glad for the videos you made!! Keep it up please, its a pleasure to watch your work. Cheers from Poland!
Love watching you work , keep up the good work
Superb again Mark. Your videos make me happy.
Was hoping you’ve play some non copyright music through the amp to show it actually working. That would have been the icing on the cake
Good video. I've had one of these Technics systems from new, and the only issue was the sound died on one channel. I got an electronics engineer to have a look and it turned out to be dry joints similar to yours. Folk have said they are prone to overheating so a better brushless fan wired to be permanently on is a good idea.
Another wonderful repair as usual. I really appreciate all the effort you put into making these videos, watching it feels like being an apprentice. After your last Technics amp video, I decided to dive into my cheap Technics SA-GX300 bench amp to work on the noisy rear fan. The motor itself was a bit of a pain to disassemble, but after adding some light oil to the bearings and cleaning off some crusty dust build-up on end of the commutator, it now runs completely silent again. I was a bit surprised you didn't go after the noisy fan on this one, as mine was in a similar state and it was driving me crazy! Regardless, thanks for all you do, and I am looking forward to your next repair!
Hi, was that general maintenance, no parts, or was something else e.g. no input? Thanks, best regards.
@@franciscorompana2985 No parts needed. The only issue with mine was the fan noise and I was able to repair that by removing the fan, disassembling the motor, cleaning the dust buildup and adding new oil to the bearings. The only tricky part was that there is a small plastic bump on the bottom of the plastic shroud that holds the motor. The motor has to interface with this bump correctly, if you don’t, once assembled the fan blades will interfere with the housing. It’s trivial, but it is a detail that can’t be overlooked. While I was in there, I also cleaned and replaced the thermal grease on the heat sink.
Good sir, I want to thank you for that 'dry joints' tip.
It turns out THAT was exactly the problem on my vintage AKAI AM-32 amplifier (apparently also 'audiophile grade').
I resoldered the problematic joints... and BOOM!
Right channel works again!
+ adjustments board (bass / treble / balance) works again!
Thank you - really! :)
Up until this video, I didn't know this was a common problem
cheers from Amsterdam
Hello Mark, I have been following you for a while, and I see the way you provide in repairing old devices. I liked your explanation and your high professionalism. I hope that the Arabic translation will add you to the channel.
@Mend It Mark - Watching you 'speed fix' your way through this amp, reminded me of the days I earned my keep hunched over my workbench, armed with little more than a soldering iron and a can of RS (lubricant free) switch cleaner. 😉👍🏻
Like this guy, always smiles even with troubles encounter during trouble shooting. keep it up
Another smashing job Mark!
I just have to watch you so brilliant jobs and quick as well , thanks for the video
Good job sir,I enjoy a lot the way you work and your smile face too, keep smiling 😄
I had a stack of Technics receivers that went in the bin 90s probably just needed a resolder thanks for your help now I know what I could of done to mend it.
Love to see stuff like this getting serviced this amp was part of a midi stack system worth £1200 back in 1992/93 . I'd love to see a full system brought back to life i bet the tape decks are a nightmere to work on
They certainly are...those tape decks...but amp is still going good after 32 years..sux120.speakers still proper!
Really enjoy your work. I wish I had one tenth of your knowledge and skill. Thank you!
So good to see the use of a simple screwdriver. For some youtubers it's the smaller the screw the bigger the drill.
mark you put a smile on my face brother your positive nature and wealth of knowledge really love it , all way across the pond in Roberts arm ,Newfoundland ,Canada
One of my all time favourite amps and as you say a good ebay trading amp. They sell for quite some pennies indeed. You can pick up 'faulty' ones for next to nothing but the fault is that the EXT In/Out as not been bridged with pins or a phono cable ... ive picked many up like this. Tested them, cleaned them up and stuck them back on ebay. Never had any bother and I use one as my daily driver along with its matching SB-CS70 Speakers.
It's nice when it all goes good, when you know what you are doing it looks easy. Experience is worth £££££££££££ but you can't buy it. Another good video and worth the wait. Thanks, Mark.
Truly excellent work Mark. Glad I found yr channel. and I subscribed. I like your methodology and the professional way you shoot & edit the video. I would have also checked the small electriolytic caps and replaced them if off spec. After re-capping 9 Linn Klouts I found the smaller ones go off first and the big reservoir caps (10,000uf @63V@85 degC) hold up much better on account of their greater size. Thanks - now I have another channel addiction !
Love your videos mate. Keep them coming!
Great repair mark , wish I lived closer to you, got loads of vintage hifi and boomboxes that could do with your talents 😃
My new favourite channel 😊 Is it just me or do you also feel like you're watching Phil Collins' younger brother repair his equipment 😅
i just watched your workshop tour and now I'm intrigued by your background, you are incredibly skilled. Tell us about your history dude.
Mark, Now I'm Addict to your Videos...
I have the same little A/D converter box, and it's really all you need for that situation. I use it to make cassette recordings of digital files and it works amazingly
Man you are a treasure and probably the most inspirational person on Utube
lovely job Mark. excellent.
Glad I found this, got this same amp as part of a full system many years ago, it broke once volume control kept going to maximum on its own, had it repaired but broke again and has been stored in back room for years but now I have an idea to fix it. Was going to junk it which may still be an option😁
I had a notion of starting to repair electronics when I retire. However, looking at your array of kit, I can see no chance! I love repairing things. I like the challenge. I also like defeating modern society and the manufacturers that seem content to sell you something every two or three years and to add more and more to landfill. It is disgraceful. Repairability should be designed in. I really enjoy the videos . I am a patent attorney and find them really interesting and well presented. Thanks.
brilliant as always Mark, must get my Technics sent in.
Prob been said but you have the best intro of the lot...Love it
Cool! Nice to see a new video Mark.
Love your videos Mark ❤
I have one of these. The cooling fans go on them. Good thing you checked it was running!
Another Mend It Mark patient cured! Fantastic job buddy!
That whole chassis looks exactly like my Sony receiver from a similar time, though mine is probably older by a couple of years. It's got a bit of a rattle in the output when I touch the chassis. Don't know where to begin, but this inspired me to give it another go soon! Cheers!
first class, great work as always, great to see these brought back to life:-)
I had the base model of this amp along with twin tape deck, was brilliant. Ran a pair of mission 733 speakers beutifully.
Very good video, subscribed.
Another great video, ohh how much stuff has been trashed cos of broken solder joints! - keep up the great work and i so love the opening theme music too
what a awesome repair. for the fans that rattle i use a seringe with super lube oil. even when it is a closed fan you can get a bit of oil in to the bearing. it helps to stop the noice and gives the fan extended life
I have one of these amps had it for years it has stunning sound quality
Very nice Guy and interesting videos at these channel. I love it. Best regards from Germany
This one was clean and not much used only with some dry joints, but with more use may be nightmare with lots of bad joints and bunch of bad small capacitors close to any heat source. The miniature Panasonic Matsushita small capacitors of that era are awful. The worst thing is that they are used in places where miniatures were not needed.
I would normally clean the fan that Technics put almost in every model, even on high end plastics 😂
The feet pads left of the upper unit on the cabinet are pain to remove if they got harder. I tried it once. 😅
They are like melted stone 😮
Thanks Mark, am enjoying your videos 👏🏾👏🏾👏🏾👍🏾
The specialist deoxit Fader Lube product is well worth using for pots and of course fader pots gives a remarkable increase in pot smoothness. Hope this helps!
As usual, very interesting, I enjoyed this vid. Thank you.
Really great content as always. A bit of a tip for you if you would prefer to drastically minimise your time spent editing yet have long and very informative videos, and that is to not worry about making everything super snappy and slick with multiple close-ups of plugging/unplugging cables, removing many screws, etc. Instead just kind of 'go with the flow'.
For example, there's a TH-cam channel called Mustie1 which I have been regularly watching for years - he mostly does engine and mechanical work on assorted vehicles and mechanical tools, some of them are very obscure and also really fascinating. His channel is an excellent weekly watch because he's really relaxed with his editing. He'll happily move the tripod-mounted or handheld camera around while having a one way conversation with his viewers. To save on editing he'll usually switch off the cam when he's done with a particular segment and then switch it on again as required. He does it in such an organic way that the videos don't seem 'rough and ready', instead they are entertaining and inclusive. Watching a Mustie1 video is like putting on your comfy slippers and settling back with a mug of hot chocolate. 🙂
Of course, that's just his style, but I feel it would suit you too. Like Mustie1 you're very relaxed, friendly, chatty and informative and because of all that this channel has become one of my favorites. I'm just suggesting the above with the aim of helping you to minimise the amount of time spent editing which, as you know, can be a time consuming pain.
Very entertaining to watch, great repair! 👍
8:18 twin overhead screwdrivers. Slick work Mark 🤭
New subscriber Mark ,really enjoying the videos and learning loads. Cheers
Good stuff, keep her lit.
Nice to see a fellow electronic engineer doing their stuff on't net.
Must admit to a bit of tool/equipment envy!
Fixed mine. Thanks Mark!
that sine tone on the tuner input got me thinking for 2 seconds :)
a great looking amp imo