Mark. This vid was really helpful. I own one of this units and it was blown away during a blackout. Turned out the very same components you had to replace were 'toasted' in my unit. The mosfet and that very same diode. I purchased "close enough" spare parts and voila! Unit repaired. Thanks a lot!

Techmoan directed me here, and for good reason, too. Always a joy to see a bit of gear come back to life.

These are much, much more serviceable than anything TC puts out nowadays. Great job Mark!

"Top Trumps for geeks" - you've just taken me right back to my childhood Mark!

With each of these videos I watch, I learn something new.

This power supply is the same as the one used in Tannoy TXD-1 audio processors! I've repaired many and the main culprit is the large smoothing cap (don't forget to discharge as it holds 400V!!) The outputs are +15v, -15v, +5v and +3v. The smaller caps go quite often too and strangely - my last repair was the same Diode! thanks for a great vid! Bravo!

@sunship2

Жыл бұрын

Tc electronics and Tannoy: Same owner, so that makes sense.

Mouser is 140 miles from here in Texas USA. I like their engineering department. If you have a part you cant source they will check it out for you have what you need the next day. During my years I would need only a small order at times. They never complained.

Binged all your videos. Excellent work! I’d like to request vintage synthesizer repair videos. You’re skills would translate into fantastic videos for synths. Other professional recording audio gear as well. Looking forward to all of it.

The most sympathetic presentation of all. It´s real fun to watch. Great knowledge, experience and wonderfull light-hearted.!!!!!!

I have no idea about none of what you’ve done was looking for videos of this pedal board and ended up here 😆. I enjoyed watching the whole procedure.

Lovely nice to see repairing stuff components,save it good job..

no idea, but I love watching mark explain stuff I have no idea about :)

I've been working my way through all your videos over the past few days. They are very well made, interesting and informative. Thanks for taking the time to make them and for sharing your knowledge. 👍

very nice repair Mark,i look forward to your videos...please keep them coming.

Great job, service with a smile!

Just discovered your show, and it's amazing how simple cheap pieces that fail that inevitably push electronics to the scrap heap, keep it up. Cheers from Cleveland, Ohio and should you ever want to visit these parts reach out I've got a few airbnb to set you up for a night or two. In trade for the time spent putting your videos together.

Legend! Wish we had a man with your skills my neck of the woods. Pleasure to watch, rock on! 🤟🏻😎

As usual Mark! Great job, nice pedal by the way!

Man you saved me with this video. Exactly the same thing happened. Transistor and diode to be replaced. It's good that I can replace it myself, otherwise I would have to pay PLN 200 for the entire power supply. Sorry for my English but I'm from Poland and I'm using a translator. Thank you and best regards.

Fascinating to "listen" to your analytical mind work. NIce work indeed, mate. -Mark fr/CT USA

Well done Mark. Like your stuff.

Excellent work.

I enjoyed watching your troubleshooting mind looking for clues and solve it!

Datasheet comparison = "Top Trumps for geeks" amazing! : 0

Great video Mark!

I have another type of TC unit with this same issue. Excited to see if I can fix it 😁

Good video. With boards that have sockets on the rear panel, I like to do those screws and nuts up first so the board is flush with the panel. Then do up the ones inside. That way there's less stress on the board being pulled into alignment with the rear panel.

Another great repair video, Mark! I love it that you left in the sequence where you dropped the heatsink paste-covered transistor into the board - hilarious; we've all been there! 😄

@DominicClifton

Жыл бұрын

so true!

Cool repair!

Hola , muy buena tu manera de explicar los problemas electrónicos,da gusto ver los vídeos.Saludos desde Chile

I just repaired a Voicelive unit today - exactly the same faults. I managed to get the mosfet off eBay but it was expensive. That fuse did a really good job and prevented further damage. I have a Blackstar HT pedal which also uses an smps - no onboard fuse resulting in a big toasted section on the PCB.

Great detective repair again Mark! I’ve seen almost all your videos in the mean time😂

Good morning friend, I love your videos, I admire good technicians like you, always a like, your work well done with love....Marcos do BRASIL..

I had a TC Nova Delay fail dead a few years ago. It was before I got into electronics so it went in the bin. Bet I could fix it now.

Great job

I so enjoy your philosophy .

I just got a very similar issue with the PSU but in my unit only the secondary side SB240 went off. I replaced it with a 1n5822 and it works fine now.

Good job! 🎸🙂

Great job!

It is good to check the gate turn on voltage of mosfets. Some are made with a lower voltage to work with logic levels.

Finally i have seen a use for those dessert glass jars that clutter my cupboard ;-)

Hi Mark good video. Please please be aware of the glue that’s on the circuit board over period of time goes hard and crusty and creates resistance which causes these problems whenever you see this glue in a dark state remove it. It creates a lot of problems especially in switch mode power supply’s

@SenfSenferson

Жыл бұрын

This Caused my Subwoofer Amp to behave weird... It ate through a Resistors Leg... Removed the glue everywhere on the Board and replaced the Resistors. Works like it should again :)

@ganapathipai8853

Жыл бұрын

Yes it's true. LG set had similar yellow glue and in monsoons it used to conduct and caused malfunctioning.

Thanks 😎 Scotty

T.C. ELECTRONICS are a quality company when it comes to sound processing. My friend designed some of their products and also ran a studio in Germany. Makes you wonder why they have design flaws from the perspective of the repair engineer. But it's common to use a screwdriver that has an angled bit for these jobs. But I guess it happens with cars too - awkward to carry out repairs for some. I worked as a gas engineer and we never repaired anything at component level. Lots of wastefulness in the gas trade.

I came across this by accident. I have zero skills in this stuff. That was fascinating wizardry, thank you so much.

Wish I was in the UK, Mark is the kind of guy you want to take down the pub for a pint.

@jerprouse146

Ай бұрын

Where are you? I'm feeling thirsty

Get in. Get out. Get it off the bench. That's the day job right there. Nice work. And send it back cleaned. Yes. Totally agree. Thanks Mark. Always a pleasure to watch one of your vids when I actually should be repairing stuff! OK. Back to the bench.

@gribbler1695

Жыл бұрын

This is not his day job.

I see that you the person who can fix my parametric equalizer Apex 109 and my Tascam tape CD recorder.

I own many tcelectronic pieces and their fairly rare failures have ALL been the SMPS, often easily replaced as a unit.

Nice job Mark. I bet you're glad you checked the secondary for shorts. I'm guessing your new switching transistor together with who knows what would of let out the blue smoke if you didn't. I've seen some people use lightbulbs to help prevent psu melt down when they have trouble finding the fault. But this being all through hole makes things easier somewhat.

@MendItMark

2 жыл бұрын

Thanks! That was an easy one to be honest. I’m not a fan of things going bang, so my test socket is fed through a few things: isolation transformer, into a variac, through some light bulbs, through the ammeter, then to the test socket. The bypass switch is used to bypass the light bulbs for heavier loads. Most of that stuff lives under the bench, out of sight.

@anthonydenn4345

2 жыл бұрын

@@MendItMark Jesus, that's one hell of a safety setup. I should of known you had all the bases covered. I wish I had that mentality. I just stick wires into the mains sometimes if I'm not bothered, lol.

@EricTViking

2 жыл бұрын

@@MendItMark it'd be great to see a video about your safety setup and why it is required 👍

First vid I've seen of yours, im digging it. Please consider using a smaller aperture like f8-f12 to make the focus hunting less drastic. Focus blur is nice but doesn't seem necessary in this instance

@MendItMark

Жыл бұрын

Cheers for the advice. Although I think you overestimate my ability with the camera. Its a Sony ZV1, and I just point it at stuff. One day I might find time to have a play with the manual settings.. Thanks for watching!

I know nothing about electronics, but i found i watched this all the way through....really interesting and a nice manner. Cheers Mark. I wonder if you sold the Nova drive on......or if someone sent it to you to be repaired for them?

@MendItMark

Жыл бұрын

All of my repairs are for real customers. That’s why I get such a variety I guess!

Hi mark, i love your channel, learned a lot, i have a question what exactly do the light bulbs do on your wall with your ac supply, is it some kind of soft start or power drainage? and how are these wired up? Love to find out.

Stumbled upon your video. Your expertise level and ability to explain 'on the go' are amazing. As an owner of a TC Nova System I also have a question: the control knob seem to be rotary encoders. With time they seem to get less responsive. In your expertised opinion: is this similar as with normal potentiometers? As in: could I use contact cleaner, or should I take other measures?

@springford9511

Жыл бұрын

I don't really know, but I would imagine that rotary encoders would be solid state and have no contacts. But I would apparently be wrong:-) kzread.info/dash/bejne/nq2g0tRqkdHHfMo.html "How To Fix An Erratic Amplifier Rotary Encoder Volume Control"

Thanks

Good job man. What cleaner can you suggest to clean front panels and faceplates? I have a couple of mixers that need a good cleaning.

@MendItMark

Жыл бұрын

I use general anti static foam cleaners, like one from RS components. However, consider that they might clean off some markings and paint ( see my Technics SU-V90D video to see it go wrong). Just, don’t leave them to ‘soak’ too long, as any reactions will be worse. Test a small area first for bad reactions. In general, more modern mixers use better inks, which don’t rub off.

Another great video. Thoroughly enjoy the education. Do you have any thoughts as to why these little components fail or is it mainly just cheap components ?

@pauln6803

6 ай бұрын

So many possibilities! Power surges, manufacturing defects, component spec drifting over time, poor product design, cheap power supplies with poor regulation...

In the automotive buisiness a proper repair is not only to replace the faulty components, but also look why they were defective...

Old parts can be soldered from old circuits, this is not a problem.

Want to have a go at my Digitech JamMan looper pedal Mark? All works except the audio feed from the input through to the output.

Look at your equipments and parts, imagine how long and difficult you setup your workshop

Thanks for a fantastic video. I love the sound of this unit. But I had reliability issues with it. Is there any way of making them more roadworthy? I found the foot switches unreliable too.

@pauln6803

6 ай бұрын

I remember the Trace Elliot solid state amps that sounded great, but died every 5 minutes.

Hi. What's the spray you used to clean the unit at the end? Love your videos, keep them coming!

@retropcs88

12 күн бұрын

RS Electronic Cleaner

I have one of these......some how it lost it's memory and I had to reflash the EEPROM. I had to purchase a special dongle to do it. decent sound, maybe a bit processed...the Pink Floyd presets are dead on...

"Top Trumps for geeks" 😀 been there a few times!

Hi Mark. What kind of diode did you use? Greetings from Oslo.

Play it Mark….😊

Cant you tell from the voltage range at the back (100-240v) that its switchedmode?

What is that spray foam? Name or brand

Hello . I have a Pod GO and the display is white. What could be the reason ? Can you help? Apart from that, everything works as it should. Regards Tom

Again! Mr.Engineer save a musician's!

"This is like Top Trumps for geeks". Brilliant

Mark, what type of spray cleaner do you use on the outside of the case of the pedal?

@MendItMark

4 ай бұрын

Its an Antistatic Foam Cleaner. I use several brands, depending what is the best deal on the day. Currently using Electrolube AFC400.... I reckon they are all the same.

"It's quite a big one..." that's what she said, mate! 😁You'd be better off applying the heatsink transfer compound to the heatsink, rather than the device (assume all plastic here). Less messy!

Was the audio recorded through a wax cylinder or is my phone broken

being new to electronics repairs.. Im confused... When you inspected the mosfet with multimeter.. You said 15 ohms, etc.. Its shorted... I was under the impression that 15 ohms on an electrical component, Or, even readings in K ohms, was not a short?!? I thought closed to 0.... 1-2 ohms etc, Is a short?!?!?!

I know you’re not a neurosurgeon,but if I ever need one,I’ll ask for you ..

hi have a acc with RS i will say they put up the price of the shipping it's now £30 for free post there was some small parts for my teac 80-8 deck under £10 ad on vat and post costs it's would be £20 so beware

@Petertronic

Жыл бұрын

I stopped buying from RS years ago for that reason

Tolong kirim alamat tempat servis efek gitar digital G1X nya ya pak

Honestly Mark . Is there anything you cant repair lol

Con un alimentatore lineare sarebbe stato molto più affidabile. Quello switching fa ridere....