Thanks for watching, subscribe & share! 2-channel power amplifier restoration - Restore step by step ► Subscribe to channel: #Mr_Electricity #Restoration #Repair
Пікірлер: 335
@tableseven81333 жыл бұрын
I think this is the first restore/repair I ever saw of your's. I will hold all negative comments. I was glad to see your simple technique for testing the transistors on an analog testing meter.. Not so easy to do that on a digital testing meter. Your video kept my attention.
@selectorerwin1don122 жыл бұрын
Lol for real but i think thats the old school way also da best way
@turnepokkamandag21382 жыл бұрын
Pake ko 😆
@hanhduy45403 жыл бұрын
Bác thợ này cao nhân ! Chúc bác nhiều sức khỏe !!!!!!
@H-774 жыл бұрын
Looks to me like one of the many inexpensive amplifiers that cloned the layout of the Crest CA series amplifiers. No schematics appear to be available, although the lack of mica insulators shows that the circuit topology is not the same since the collectors are apparently grounded. By the way, there is a torque specification for TO-3P transistors, usually between 5 and 10 inch-pounds- significantly less than people tend to think. It has been mentioned already, but there is a reason why the original transistors failed. Checking the quiescent current in the output stage as well as running a sine wave test into a dummy load and looking at the output on a scope are worth doing.
@gino32864 жыл бұрын
"the collectors are apparently grounded" i would like to ask if this is a good technical solution. It seems very convenient for output stages. I have a qsc usa 400 and i guess it is made in the same way ? What low power pro amp would you recommend ? something with 250w/4ohm i mean. Thanks a lot and regards, gino
@H-774 жыл бұрын
@@gino3286 Very much depends on the implementation. QSC has had a lot of success with that topology- they perform well and are very reliable. I've never really played with the topology myself, but eliminating the mica washers has both thermal and cost of manufacturing advantages. Another way to eliminate the need for mica washers is to use separate, hot heatsinks for the NPN and PNP sides.
@gino32864 жыл бұрын
@@H-77 I think it is a interesting method The heat transfer must be optimal and also the thermal equilibrium between the output transistors. Grounding the heatsink maybe improve also safety ? Thanks a lot again. Kind regards, gino
@AJ-jo6qk2 жыл бұрын
bongkar abis nih heheheh
@jp3585 Жыл бұрын
SIR YOUR SOLDERING IRON IS VERY DIFFERENT 👍👍
@toanbui35493 жыл бұрын
A sua chua chuyen nghiep hay qua ko biet dia chi o dau sa binh luan toan tieng nuoc ngoai xin cam on
@charin19702 жыл бұрын
สวดยอดช่างของจริง ทำแล้วต้องดี
@badtensioner4 жыл бұрын
Installing power transistors without checking voltage bias is very risky. You might end up changing them again and again.
@JRNelson783 жыл бұрын
As i saw, there is no trimmers on the PCBs. SO i guess it`s an automatic biasing, they monitor the output offset, and may be that chip on the board (may be OP amp based circuit) ajdusts it.
@2Cineman3 жыл бұрын
I've repaid many amplifiers, and in most cases where ther are blown output transistors, the drivers are usualy blown too . didn't see the guy do any fauslt finding, other than a diode check of the output transistors - fake ivideo if you ask me
@salmaankhan43184 жыл бұрын
Super amlifer super very good video nice work very very good video sir thank you
@cameronwilson85612 жыл бұрын
I love it how mr electricity never wears gloves. Until the bucket of soapy water come out… 😉
@eduardoroxas81494 жыл бұрын
Mr Electricity you work amazingly seems you knows the design and circuit configurations of the amps didn't see you label or marks any of the hook up wires .
@carlosrobertonascimentosil9033 Жыл бұрын
A sua profissionalidade é incrível, parabéns pelo o trabalho muito bem feito. Sou aqui do Brasil da cidade de Fortaleza Ceará.
@alemelian82203 жыл бұрын
Hola amigo sos lo máximo la tenes bien clara a la electrónica como quiero ser como vos para trabajar así y hacer mucha $$$$ soy de argentina salta veni a la Argentina yo te doy donde vivir
@catden173 жыл бұрын
my no.1 dream i have a power amplifier .. watching from phillipines
@catcheat69454 жыл бұрын
Sir, with people like you this would be the perfect world.
@braydenh1904 жыл бұрын
Especially since its ending.
@babuutech94512 жыл бұрын
For sure you are great technician by professional big up man .....I got some things from your job
@reinaldospear2266 Жыл бұрын
Excelente profissional 👍 Botei fé 🇧🇷
@user-nf2lj1zr7x3 жыл бұрын
Thank you for the thanks to this work which is more wonderful and tag that you are all quiet. Order your honest sanitary maintenance of modern auctions from where we start. This is our voice and respect, our gravity profession
@myvideopradip.s21362 жыл бұрын
Nice work sir.
@user-ed3ye2ol7s2 жыл бұрын
Super!👍👍👍
@Tom-zq7lu4 жыл бұрын
FANTASTIC, RESTAURATION, BEAUTIFUL AND VERY VERY BEST OK 👍🆗
@SauvikRoy3 жыл бұрын
21:09 What a monster that!😎 Great work!👍
@gervaziovieira24113 жыл бұрын
Very good.
@somasundaramsomu20133 жыл бұрын
Super create👍
@Balthazare694 жыл бұрын
Little more and u will have whole sound system for big concert xD As always great work, bravo!!!
@hoangcamcdldtanlap16173 жыл бұрын
Mình thích cách bạn làm lắm
@gino32864 жыл бұрын
Dear Sir, thank you very much indeed for your always very great video and very educational. However i like to use a little brush for thermic paste And the electric drill seems to have too fast rotation. Clearly you were in a hurry ... i love your videos. When i will retire i will try some restoration work ... i love audio equipment deeply. Thanks again and kind regards, gino
@narasimhachary16543 жыл бұрын
Great, you are full fledged service personal keep it.
@burkhardboer55244 жыл бұрын
Macht immer wieder Freude einem Experten über die Schulter zu sehen. Großartige Arbeit!!! glG.
@VivoVivo-zh2tq4 жыл бұрын
From Malaysia...👍👍
@gino32863 жыл бұрын
Hi nice amp indeed. It looks very well designed and also parts seem very well sized. Great job as usual. It is a pleasure to watch your repair videos Thanks a lot. Kind regards, gino
@kevinpotter78994 жыл бұрын
Great video ... but replaced all those shorted components ... all back together and flick the switch and Voilà !! works !! Surely there was abit of last minute oopsy in between ??
@AstrosElectronicsLab3 жыл бұрын
Meh, don't think so. Usually when output transistors short (because the output was shorted to ground), replacing them is usually all you have to do - if you're lucky. As long as it didn't take out any of the biasing components, all good. It looks like at least one fuse blew on each board protecting the rest of it.
@selectorerwin1don122 жыл бұрын
Good job definitly i wasnt gonna take all those wire apart..lol amp looks n sound good
@deepdance1112 жыл бұрын
I have so much respect for what you guys do...Gretings from Poland :)
@sabangoktas69513 жыл бұрын
SÜPER BIR IŞCILIGIN VAR ELINE SAGLIK
@hasanuddinlalot43633 жыл бұрын
Master nya Power, hebat 👍👍👍👍👍
@maysalvador2023 жыл бұрын
he's great, i will bring my ingrated amp for restoration. God Bless Mr. Electricity.
@kaylapratita2753 жыл бұрын
Sangat detaell. Serwis dan bagus.👍👍👍
@antiqueland74913 жыл бұрын
Ok , very nice👌👌👌👏👏👏
@ocad-odong4 жыл бұрын
Muantap👍sukses selalu kawan🔔👍 aku yakin kawan bukanlah kacang yang lupa akan kulitnya.salam kawan baru dari Bogor 🙏
@christopherouat34554 жыл бұрын
super restoration mais normalement il faut mètre le volume a fond sur l'amplie après on règle sur la table de mixage
@carlosazambuja17423 жыл бұрын
...applause, master job, it´s a pleasure to see this restoration...
@DouglasSilva-hy7jd4 жыл бұрын
It is a good work of restauration and a very beautyful amplifier.
@JorgeFlores-xl2nv3 жыл бұрын
N. E. G. A. T. I. V. O. !!!!!!!!
@samuelmorales26123 жыл бұрын
Hola saludos mr Electricity te felicito es un buen trabajo muy bien hecho así habían de trabajar los que ven tus videos saludos desde puebla pue.Mexico
@WayniKlaru143443 жыл бұрын
thank you so much for this video. I wish I have the confidence and technical expertise.However, looking at this video helps me a lot gain more insights and understanding on how and where to test some basic troubleshooting area of known issues. It looks easy in the video but they aren't. I am now a big fan of your talent. God bless you Bro ! Keep doing what you love to do. If you need a partime apprentice in the weekend. I would like to apply.😁 #loveelectronics #cebu
@warmachine13732 жыл бұрын
What kind of cleaning chemicals are you using for cleaning all the electronic boards????
@christiaanhauchecorne22712 жыл бұрын
just loosen the screws with a hand screwdriver Otherwise you can damage the screw thread
@renemartin60023 жыл бұрын
Bravo mr on a besoin de vous ici merci
@jeffr04 жыл бұрын
Mr E, theres no way that you know how all that goes back together. I'm convinced the 2nd half of this video is just the 1st half running backwards.
@AstrosElectronicsLab3 жыл бұрын
Doubtful. Also, a camera was recording the entire time. It isn't too hard to go back and look at shot footage to see where things go. Plus, if you work on enough amplifiers (I know from experience), it's not hard to work out where wires go. PCBs are marked and cable lengths bend over time to roughly where they want to connect to.
@user-zg6bp1eg7e4 ай бұрын
Te felicito por darle vida a este buen ampli, saludos cordiales Nezahualcóyotl México
@skhosanamathiyane3 жыл бұрын
Ye man,nice job indeed,,,,,,,,,South Africa 🇿🇦
@creativelife44534 жыл бұрын
awesome restoration, i learn from you much
@joseaguilera15124 жыл бұрын
Es un deleite mirar la forma de trabajar,felicidades.
@OriginalFinnish224 жыл бұрын
Subscribed!! because damn that transformer is HUGEE!!!
@TempoDrift14803 жыл бұрын
Yeah man, nice work. Watching from United States.
@Kirill_Maker2 жыл бұрын
Did you check bias and drivers? And capacitors too.
@khasrumia50933 жыл бұрын
very goog jov..i like
@pogiako82983 жыл бұрын
what isa the name of your liquid dispenser i like it
@ramabhairatdiyabharwad-81824 жыл бұрын
Jordar Sarvis Kari Chhe Ho Bhai
@timschutte69243 жыл бұрын
Nice, I'll buy it now !!!
@classiczzize3 жыл бұрын
cool bro i did fall asleep
@JohnvL3 жыл бұрын
Nice Job!
@rkangler3 жыл бұрын
Weldone my friend. Very nice restoration. 👍
@kauanvideo52853 жыл бұрын
//KAUAN ViDEO\\👍👍👍👏👏
@skylinefregion61674 жыл бұрын
Wow very nice restoration.
@rodrigosantosmello99322 жыл бұрын
Esse cara e fora de série
@trentjackson48163 жыл бұрын
Competently skilled technician. 5☆
@baniadamtv4 жыл бұрын
Nice work, Nice amplifier.. 👏👍
@Learnelectronics7383 жыл бұрын
Very good video Amplifier Thank you
@franciscohelioandrade97824 жыл бұрын
Excelente trabalho ficou top de mais 🇧🇷🇧🇷🇧🇷🇧🇷🇧🇷
@robertgorge11524 жыл бұрын
Very good job.
@leok62994 жыл бұрын
Excelente trabajo!!! 👏👏👏 🇦🇷🇦🇷
@schemkesa2 жыл бұрын
grreat job
@user-fp9mq9vx5o4 жыл бұрын
хорошая работа молодец
@gafurjaborov95713 жыл бұрын
Привет где этот мастер я адрис не понел лотинский читат не умею руский магу
@jesusjoaquinpool44562 жыл бұрын
Si Hola hermosa bien trabajar
@glynndoger10663 жыл бұрын
Thorough beautiful work. GONGRA!
@albertchiu6553 жыл бұрын
the man is capable!
@josealvessilva5563 жыл бұрын
esse sim sabe trabalhar e ñ tem preguiça parabéns o seu trabalho é nota 1000
@user-zt3pf1pg6p3 жыл бұрын
Good work
@danielcifuentes61452 жыл бұрын
Amazing job! 👍
@CarlosLima-gd8fy3 жыл бұрын
NOTA 1000...PARABÉNS!
@xhabirzejnuni66522 жыл бұрын
Complimenti.
@kangtodinasty18003 жыл бұрын
Mantaaaa bossss
@markmiller58893 жыл бұрын
This guy is amazing !!!!!!
@catherinesong7753 жыл бұрын
Awesome guy!
@marvik7774 жыл бұрын
Молодец мастер хорошая работа.Лайк за видео.
@alexeymagov72914 жыл бұрын
Very good!!!!
@tubeDude483 жыл бұрын
While you had it apart, why didn't you replace the large electrolytics?
@bhutkaderaghunath71303 жыл бұрын
nice work brother 👍👍👍
@alferjr26523 жыл бұрын
sir can i ask what you use to clean the the board.look that your so good doing well.
@flamedub3 жыл бұрын
Tidy work. I have an old amp very similar.
@yulianashanty85644 жыл бұрын
mantap master .berapa harganya.klau di beli dengan ongkirnya ke flores ende..
@kyhoahoang82133 жыл бұрын
Mấy a vn mới làm thế,,,😁😁😁😁
@user-lx7yp3kt2g2 жыл бұрын
Неужели есть такие мастера.Просто супер. Молодчина...
@meaninthemirror3 жыл бұрын
He was so sure from right at the beginning that he's going to fix it.