As a sysadmin, I find it particularly humuours that capacitor 404 has gone missing. Great content.

I'd be cursing like a bloody sailor for every blown component. You just smile, giggle and move on to the next. What a guy! You have such a genuine positive aura around you :)

The Bob Ross among electronics technicians, love it!!!

I was freaking out at the end! The MOV still had a good chunk missing and the center leg of the neighbor IBJT was missing most of its solder.

In my humble opinion, these are the only "shorts" young people should be watching on KZfaq

When you removed the board and started probing around, I was waiting for those caps to let you know they’re not discharged, I was not disappointed 🤣🤣🤣

You are so patient and careful. I’d end up with a collection of screws and components with no idea what came from where. I enjoy your cheery disposition and quiet competence. Keep doing what you’re doing!

This is the best repair channel on youtube. It's fun to watch and educational. Your fun and positive attitude towards even the most pesky of problems makes it such a pleasure to watch. Thank you Mark! excellent content all around. Sign me up as your newest subscriber : )

brilliant job, pure patience, a great example in how to logically deal with multiple areas of damage and how to deal with board and pad damage

You and a few other KZfaqrs like stezstix fix have given me the confidence to learn how to solder this year and hopefully be fixing audio stuff like you in a few years.

As always I could watch you every day Mark! Fantastic job on these!

I love this guys demeanor. Just so easy going and happy. 90% of us would be cussing and throwing a kaniption fit

The problem with counterfeit semiconductors is a real pain. Having the curve tracer to check them under load is almost mandatory these days. Nothing worse than watching your extensive repair go bang. Great video.

BACK IN THE DAY (1986) I repaired an old-school CS800 (which I still own and should probably not power on without checking all the capacitors). Between an electrical engineer at work and actually speaking to techs at Peavy in Meridian Mississippi to determine parts I could substitute in the 1st stage driver board - got it going again after replacing several big-ass output transistors. Built like a truck, really. All those big transistors mounted on huge heat sinks - and a chassis which was designed for the fan air to blow up to the top of the case, along the sink fins and out slots in the top sides of the case cover.

Thanks for the video Mark. My friend, a HiFi audio amplifier designer and engineer really enjoyed it too.

Mark, your positive attitude is infectious, and you know your stuff. Self tapping screws can be a liability in electronics because they can spit metal particles into the circuit and that can let out the magic blue smoke. SUBSCRIBED!

I have no idea what Mark is doing, but I do enjoy his narration and the personality that is revealed.

That must be a very valuable amp; to have technician-repaired not once, but twice! Back thirty years ago, when I was a young dumb techie, they used to yell at us if we'd spend more than a few minutes on each board. If the board was so far gone as to char the mask or burn the traces, in the rubbish bin it went. Awesome repair; I see so few with this kind of skill level any more. Subscribed!😁

I work on old point to point wired guitar amps and PA amps, this video reminds me of why i only work on stone age tube amps, lol. SO much simpler and easier to trouble shoot., great video! Thanks for the upload!

This is my new favorite channel. I absolutely love watching him work ! Positivity is contagious!

Between you and Mr Carlson the world of electronics is made to look a whole lot easier . Great work Mark, wish you lived closer.

Great job! At 4000w it’s more a heater than an amplifier! I’m a retired technician still doing repairs at home. I have to say It’s nice to see how much fun you have doing these diagnostics and repairs. Over the years i have seen too many unhappy technicians. lol The curve tracer is amazing. Didn’t have access to that in my time or maybe my bosses where too cheap! 😂

Your funny way of commenting on the repairs makes you very likeable. I really enjoy looking at your repairs. Please keep it up. I come from Germany and am a trained radio and television technician. Your English is easy to understand. Thank you and of course subscribed. Kind regards, Rolf

Another epic job. There's always so much jeopardy where large power amps are concerned. Almost as bad as doing UPS power supplies. That curve tracer is worth it's weight in gold these days with all the dodgy components flying around. Another great video.

Love that enthusiasm and fun that you are having doing these repairs. I wish I could learn that

26:23 I was a bit worried that the middle pin on ic Q132 on the right hadn't been soldered. But I'm sure that Mark would have spotted it but didn't film it. And yes the upside down resistor did trigger my OCD but I got over it eventually. C404, the missing capacitor mystery. I spotted that it was actually in place at the beginning of the video. Weird how it vanished. Probably under the workbench. (You'll find it one day... 😂) Great job as always Mark! You make it look so easy.👍

I literally just stumbled on your channel, wow you make work look like fun, you have a new fan, you seem to have every tool you could possibly need,. THANK YOU FOR FILMING ALL YOUR WORK,.

I just found your channel. I have been in the rf business for 40 years. Its a treat to find a young man at you repair caliber. Excellent video. Thanks

Yours is now my favourite KZfaq channel and I think I've watched all your videos at least twice, so keep them coming.! You did a great job on this amp. Finding all those faults was top-notch.

Nice bench. Nice to see someone else is into it as deep as I am. Also glad to see someone else into repairing electronics.

I see many a HP instrument that I have used in the past in troubleshooting. You take me back to things I was doing using SMT devices. Where I worked, burned boards were required scrapped. Could not sell. Lots of memories I am reminded of. Thanks for the video.

Joy to watch you working on it! You sure know your stuff and being very handy on top of it makes the winning combo!

Epic job Mark. Really enjoyed the fault finding. Top job

I've had success at fixing the older stuff.......the SMD gear still makes me nervous. I appreciate your jovial attitude in getting through a job such as this.

Hola Mark, muchas gracias por tus videos, la semana anterior repare uno exactamente igual, soy de Tegucigalpa, Honduras, no tengo tantos equipos de prueba como tu, pero si el conocimiento. Que bueno que encontré este canal, me gusta la forma en que trabajas, me hace querer mejorar aun más, saludos!!!!

Absolutely fantastic video Mark you're so patient and relaxed that was definitely the unmistakable sound of a Chinook would have been tempted to poke my head out

What a nice lab you have. All the equipment you need, on hand, to make work less stressful.

Mark I wish I had 1000the the knowledge you have and 100the the equipment. It's so nice watching a skilled tradesman at work. Thank you for sharing your expertise with us. Love the channel and the videos. One last thing ,you must have the patience of a saint to fix stuff so complicated and time consuming, I would have kicked this thing into touch, after the first 5 minutes.

A Jedi power to make screws disappear? Just put them in one of my parts trays. Works every time! Love your work ethic Mark. You’ve earned a place on my panel of KZfaq mentors.

Outstanding and Brilliant are not good enough wording for your skills and talent! Love your positive, quirky outlook on challenging problems that you seem to solve with ease and poise. WOW!!

Just when you think you have seen the best technicians in the world, another one shows up in a different part of the world. Great work, very talented.

Absolute Genius. A joy to listen to your banter. You made this so much fun to learn about.

Your confidence in your repair is amazing, to put that all back together with all the screws before testing. I would be trying to power it up with all the parts still all over the bench.

Love your videos Mark! You are a true craftsman. Thanks for sharing your knowledge. Awesome shop you have.

Hi mark. Hello from Dublin. I used to work as an av tech for 15 years. So I totally understand your wows. Love the channel and your very good at what you do.

Great video... and nice to see the repairs without unnecessarily replacing parts that are hard to obtain.

I have been watching your videos and enjoying them so much. You make it look so easy and it definitely isn't easy. But thanks to you, I got motivated to fix the door lock on my Ford F-150, and I actually succeeded. Thanks and keep up the great work.

I’m glad I discovered your YT channel Mark. There’s one tool I use a lot which I think you desperately need is a micro pencil Dremel tool. They’re super cheap on Ali and come with a dozen fine bits (use USB-C charger) put away that knife and flat head screw driver and remove solder mask and burned spots with ease.

I love how much you smile. It's genuinely enjoyable watching someone who is deeply joyful about what they're working on.

Als völliger Laie in Elektronik, macht es mir sehr große Freude, dem Meister über die Schultern zu schauen, bin tief beeindruckt. Best Regards

Just found your channel. Absolute delight to watch and great work! That curve tracer is seriously cool.

That is a really nice job done! Nice viewing angles you have. Your channel deserves a lot of more viewers ;)

I'm sat in my kitchen in France watching this repair, I can say it is very therapeutic

PRETTY PRETTY PRETTY!!! And the curve tracer demonstration was a real treat! YESSSIREEE

Just discovered your channel 👍 Certainly the jolliest repairman out there.

You are great at what you do. I hope you are proud of what you can accomplish. I enjoy your videos very much, thanks for taking the time to show your work.

Very informative. A repair that I would not have attempted but you are so brave!

Amazing skills mark . Loving all the videos . 👏🏼

Absolutely brilliant Mark I've learnt so much watching this video, you are an inspiration keep it up.

Hi and hello Mark, I came across your channel just today, you repaired the technics cassette deck and I have just watched this one and after this write up the alto TS310 plus many more... GREAT REPAIR IT IS NICE TO SEE SOME ONE WITH A BIT OF BRAINAGE FOR A CHANGE!!!!! and not just BLOODY CAPS.... But we do now and then forget mr CHARGED cap 😉

Hi sir im from the Philippines ... I thank you for watching your videos ... Electronics troubleshooting God blessed with your family circle ⭕🙏😇 STAYSAFE ALWAYS ❤️🙏😇

Just can't stop watching the circuit surgeon at work.

This is a real find! So glad to have found your channel.

Very nice job and fun to see. I never worked on such an audio powerhouse. Gave you the thumb up.

I am nothing more than an amateur, and (to see someone take everything in their stride with a smile), is almost 'magical'. I have had several successes - but lots of tough-dog failures too! As I watched you work on the Peavey, I couldn't help thinking that (because all of the damage was not localised), I strongly suspected a Power Surge. greetings fro Australia.

Sono un tecnico e ti dico che è una meraviglia vederti riparare con tanta professionalità. Veramente bellissima riparazione e spiegazione di tutti i passaggi. Dio ti benedica Un saluto dall'Italia 🇮🇹

Got my electronics degree in 1985. Never used it. Love watching the process. I have 2 peavey cs 800 that have problems. I'll get to it someday. Enjoyed the video. Thanks

i love a 'mend it mark' repair video,very nice job Mark..well done to you.

Hi Mark,You have got some magic in your fingers. I am a new subscriber, and I love what I see. I think you make many owners very happy with all the repairs you have done. Well...I gave you a big thumbs up and subscribed...Until next time. Sincerely, Bert from the Netherlands. ( Sorry if my English is not a good as yours. As a dutch bloke I am trying.)

Hallo Mark,Du bist so ein freundlicher Mensch! Es ist erstaunlich,über welch ein Wissen Du verfügst.Absolut amazing !!!!!!!!!👍👍👍👍👍👍👍👍

I guess the main goal of these is repair. But I really liked the ‘post-mortem’/investigation parts where you try to conjecture and figure out what caused the malfunction 👌🏼

Should have that on Antiques Roadshow! Quality work mate.

Fantastic stuff..keep em coming Mark

I heard a story that Peavy are so well made. Some early amps were recovered from the Titanic and after drying them out they were ready just in time for the next Manowar concert.

Those little glass desert pots make great parts holders, I keep the plastic lids if they come with them for work-in-progress storage 😊

You have the best attitude of any one i have seen on you tube and excellent skills every video i have watched enjoyed .

Well done Mark. Amazing job again. I really love your repair videos, keep going. Ur a very nice person. Just one thing: at 26:50 the other IGBT (Q132) looks like it is not soldered properly. Especially the collector leg. It can be a cold soldering joint. I don't like the emitter soldering either, but I know the device is working properly. 🙂

I was learn great details about electronic repair.Thank you for these amazing videos I was watched so much repair videos last 4-5 years on KZfaq .I was find this channel yesterday.(Sure I was be member) KZfaq don't show your channel never while yesterday .I think youtube's advice channel algoritmys changed and I sure your channel's subscribers increase so you must continue to these amazing videos *Sorry for my bad english but I hope understand me

As usual, great job explaining and performing a repair. And beautiful job of recording and editing the video. Yours are among the best repair videos on KZfaq. Thanks for the great work.

That was fun to watch as im getting into amplifier repair...Love your attitude, so funny.

Did you end up replacing the damaged thermistors? Or were they fine? Very entertaining Mark. You really dig in and get into your repairs. I especially love the actual repairs on parts that are no longer available such as the motor and hinge assembly of that linear tracking turntable. Simply put you do amazingly detailed restorations.

Incredible talent. Well done. Thank you for the great content.

Channel got recommended recently, very glad I clicked. Really, really enjoyed watching your videos. Only way is up from here :)

I haven’t got a clue what you just did, but it sure was fun to watch!

Mark, you have one of the best service bench. great going.

Legend! Great repair! I wish there were some people who did what you do in my area of the states! Cheers!

I just love the sight of a large toroidal transformer. I especially appreciate it now that it's slowly disappearing forever.

First visit with you. Great fun. Thank you.

As a musician, I was quite fond of Peavey....as a repair tech though, I dispise their products. I had one of their full tube Guitar amps (a classic 50/50) for repair over a year ago and the build/design quality and repairability factor wasn't what you'd expect. Mark, you are a better man than I! Didn't hear you utter one oath or subtle threat stating you'd hoy it out the window. Just found this channel randomly and am a tad irritated I had not found it sooner 🤪 Add one to your subscriber list mate and thanks for the upload!

Bravo! What a marathon, but you got there in the end!

Fantastic repair video! Well done.

Enjoyed this one the most yet!!

I was an electronics tech for quite a few years, I wish I had half the gear that you have. Life would have been a little easier. Enjoy the vids. Cheers.

what a nice video repair, I really enjoyed it! I would have been very anxious when switching it back on that I had missed something and the same chain of event would burn the same components over again... Thanks for the video.

9:41 Got Me! I havn't jumped like that since I watched Aliens in 1992😯

You have some very useful tools I've not seen before. 😊

It's a bit uncomfortable to see all that heavy weight and the Pcb flexing when it's out of the case! Good repair!

Excellent master technician with an Excellent attitude. If I ever get a meltdown on some of my legacy equipment, he has my business without question.

Great feelgood video. Wish I had your good mood when working on similar objects. 👍

Good diagnostics,all i would ad is use a plastic spreader for the heat sink compound,just so it's evenly spread,you put enough on & it would probably spread out once heat sink is tightened. Have successfully repaired the simple peavey PV2600 ranges on many occasions,some of those blow bit time,loads to replace as well as board burn scraping,, key is not to rush & buy genuine parts,as you say ,ebay has a lot of fake parts,some are derated & almost impossible to test properly,i used a home made transistor matcher that you could load the power output trannies to there max,before they were put back onto the pcb. The thing with power amps is test at full load,with freq gen, for an hour or so,with a resistor/oil load on the output channels ,as this is the only way to make sure all is ok. 4000 watt amps will need some hefty metal clad lod resistors in oil, as lots of heat will be generated. Im retired now, had a great ,enjoyable ,varied 45 year + career as an electronics engineer.. Cheers.