I got one of these earlier this year I'll have to have a look at the glued spots and the ground spot for preventive maintenance! Thank you for the great info on this solid amp!
Great video, I have just purchased one of these second hand and had the same problem with the right channel being quiet and distorted and your video helped me fix it as it was also the switch. Many thanks Derek.
That's a nice amplifier, old school quality, I bet that wasn't cheap in it's day. That killer glue was a lucky find, caught it in time 😀 I know linear transformer psu's waste energy, but they don't generate nasty frequencys like switchers. I hope you have a better new year dave, more income and lucky finds.
Way to go Dave, another successful year.....some setbacks ....but well ALIVE. Keep your Harley ready for the next ride. Down here in Houston, it's forecast to hit freezing so it's going to HOG Hibernate . Be Safe and Healthy JwgK
They do. That's why serious music people use them. The people that hang on specs will point out that they have higher distortion which is correct but it is even order harmonics which to the ear is not perceived as distortion. Even order harmonic produces a second order harmonic which is one octave higher than the original sound. We're listening to music produced by instruments it makes the instrument sound bigger Fuller and this is precisely why musicians use tube based amplifiers for the guitars for example. A solid state app like my technics suv9 has immeasurable distortion, 0.003%. it sounds great but it also sounds sterile. Solo State apps do provide very clean unaltered sound which technically is the best but unfortunately the ear doesn't appreciate this, the ear likes the warm sound that only vacuum tubes can produce and this is one reason that most really high-end amps will put a couple of tubes in the preamp stage to warm up they're very sterile sounding solid state apps and make them sound more like a tube app and why many people will spend big bucks and buy a tube buffer and run their sound through a tube buffer as it puts those even order harmonics back in the signal.
@@12voltvids I have the JVC A-X77 which is roughly contemporary with the Sony and your Technics SUV-9. The JVC is the first, and only, solid state amp that I've heard that is as warm and rich as a single ended tube amp, while still maintaining the clean sound of solid state. I didn't think it was possible but they really worked some magic on this one
The older Sony ES range was made to a high standard, and at least it was servicable. Having owned a few over the years, they gave a superior performance compared to the mass market models. The dreaded pcb eating glue was used by a lot of manufactuers, it might have kept components and wires in place, but as it ages it does a lot of damage. Hope you have a better time in 2022 Dave.
Love the Sony ES series, I have had many "ES" CD players, CDP-302es, CDP-222es, CDP-111es, and my current DVP-S9000es player that I use for SACD playback. Awesome audio player and build quality with Nichicon fine gold electrolytics throughout. Had the Sony Service center, Phototronics, here in Seattle replace the optical transport about 10 years ago, so should be good to go for a quite a few more years. Any trouble areas on these to look out for? Like that crap glue?
Am I the only one or does it seem like the trace that got eaten away was leading into nowhere? It looked like it lead to a jumper wire on the other side that was not fitted. The trace came from the capacitor. It seems like it was omitted and that wire was run over to there instead. Really odd. Maybe the current capability of the jumper was deemed to be insufficient after the fact so they bodged it?
That thing with your soldering iron, I've had similar issues with that style of iron when the element gets a bit older and the thermocouple connection goes flaky. Basically if the TC opens while the iron is on it still displays the set temperature but doesn't send power to the element. If you do end up getting a replacement element/iron I've found some times the thermocouple is wired in backwards too, so it just sits there powering the element and thinking it's getting colder and colder. Switch the wires round & it works fine again.
it is a shame that they are not built like that anymore and everything is now mp3 and phones .. can't buy a nice stereo system for the home anymore just a real shame
@Keith Kneeland i still need to fix my crappy mcrypt amp it has its own will lol some times the left channel stops working ... then i need to powercycle it like 30 times for it to stay on and some times the power leds stay off when amp is on or are half bright or light up full .... think it needs a recap it seems to output half the power too now so yeah full recap me think but if you want to buy all new stereo components today it massivle expensive and you wont find a cassette deck or cd player new ... or is you do the cassette decks suck cheap mechanism no dolby cd players if you can find one are like fisherprice quality .... smartphones and mp3 players killed the home system
That dinky little soldering iron may be hot enough, but it doesn’t have the thermal mass needed to stay hot when you solder on that large copper pad. Anyway, I hope you (and any cats) had a nice, safe New Year. 😻
I have a Yamaha Au 900x integrated amp about 130 W 2-channel anyway every now and then I get a little bit of distortion out of the left speaker going to try and maybe deoxit a couple of the knobs switches not sure if that will fix anything I may have to take it into a shop does this a similar switches in the back like this one you're working on any advice would be appreciated thank you sir
Hello. There is a Sony 337esd, during playback there is a squeak with a crackling background to the sound. One channel is stronger than the other. Disks and tracks are swallowed quickly. What could be the reason?
It's been a problem for years in a lot of equipment. Used to cause subtle problems in sensitive circuits before it became corrosive and started eating traces and component leads.
I have one of these amps that will sometimes trip the protection when I first turn it on. Sometimes it will do it once, other times it will do it until I leave it on in protection for 10 minutes, then cycle the power switch.... Any idea where I should look for that problem?
When you spun the balance control to the left or right the sound went to the opposite speaker on my klipsch powered system connected to my computer. Any idea why that is?
@@12voltvids Well, there are the main caps of the power supply. They have those black round (foam?) things on top of them, which are held in place by the transparent plastic piece. I have never seen that before. Pieces of felt glued on the caps are popular, but this is different. I guess it is to stabilize the board against the weight of the caps.
I remember fixing someone's amplifier, just by un-pressing the tape monitor button, while doing work experience in a repair shop back in the 1980s. They gave it back to the customer without billing them
@@12voltvids we'd expect so, but some places can be bastards about it. They had plenty of other work that they're making good money from. Repair shops were busy back then, when you could actually fix things
@@12voltvids My Yamaha integrated uses the ribbons but my C2a preamp uses cool looking U joints to get the knob movement to turn the switches in the rear.
You talked earlier about a telephone repair. This reminded me of the back story of the current used to ring these phones. Are you ready? The voltages is 90. The frequency is 30 cycles per second. The Bell back story is the Mr. Bell figured out that most people could only crank out 30 cycles when wanting to call some one else. Where would you find that if not at the phone company?
There were multiple ring frequencies used in party line days. 10, 20. 30. 40. 50 and 60hz and then you had tip - ground and ring - ground ringers. So 12 people could share the same tip - ring pair. The value of the capacitor and the resonent frequency of the bell determined if it would strike or not. Here the ring vintage is 120ac on top of the 52 volt loop battery voltage.
Thanks for the video . Hell yeah I always liked the Elevated Series of Sony . SONY has very good high end speakers also they are incredable , Just cleaned all the switches on my Sansui G8000 now it works great the tone control bypass switch was dirty b4 cleaning my left channel would cut in and out ! I spent almost 70hrs cleaning everything but i took my time love my Sansui i would like to recapp but no time 😥70hr a week worklife 😥 You wouldn't be up to recapping my Marantz 2270 would ya, I pay good because i know how much work that goes into a recapp?
I wouldn't spend 70 hours on anything. That's 2 weeks full time job. Not really interested in doing full recap jobs no matter how much i was offered. Been there done that and the guy whined and complained that i broke his amp. Was not happy with the sound. Said the new caps sounded like shit. Wanted all the old ones put back in. Didn't use the brand of caps he wanted. I said well if there was a special brand he should have supplied them. I can only put in what I can source. Never again. I trouble shoot the parts that are bad and change them. The problem is all modern caps, every last one of them is going to sound different than caps made 40 years ago. They are made of different materials and the electrolytic is different chemically. This will change the sound and once someone is used to the sound of the old ones the new ones can have such a dramatic effect that many do not like the new sound.
@@12voltvids dam your on the money with recap . A lot of people don't want recaps because of this your correct , And yes the sound will change been there many times personally i am not a big fan of that long tooth sound from worn out caps . In my head new recaps puts the amp closer to the sound when the amp was new and not what I called warmed in . And Yeah 70 hours because i took my time and cleaned every last detail of the G8000 love the amp . But i can't blame ya for not wanting to do recaps at all and People don't pay up for the hardwork meaning they need to tip very well i have alway tipped very well atleast 2-300US , I had my Sansui Au 11000 recapped with Nichicons/Panasonic's caps afterwards omg that amp was on 🔥 man !! Sounded great then a friend of mine who owns a pawnshop bought from me i didn't want to sale but couldn't pass up the bread ! Thanks for the videos sorry that happened to ya love the videos anyways And I know the G8 would be a hell of a job to recapp , We are getting fewer and fewer techs these days
@@tee-jaythestereo-bargainph2120 Las one I did was 300 plus parts and all I got was whining and complaining that it didn't sound right. Sounded fine to me. Was back and forth about 5 times with it untill finally the shop owner told him not to come back again. This was back when i was still in the business. And yes it will sound closer to how it sounded when new, but here is the thing, people get accustomed to that vintage sound. They can buy a new amp and get the new amp sound. All of a sudden their old amp that they love the sound of sounds very much like the new amp they didn't like. Thing is caps that were made 40 years ago had a totally different sound. Put all new ones in and you get closer to the sound of a modern day amp. Don't get me wrong if someone brought me an amp and threw a bunch of cash on the table and said recap it I would change every last cap in the unit and set it up but i would forwarn them that it is going to sound totally different from what they are used to.
@@12voltvids hell yeah ! Finally some1 who gets it ! Also people need to take care of the Techs ! I have always tipped large its a ruff job for sure ! I will keep you in mind I got to figure out some things but I been wanting to fix up my 2270 for a gift to Zero Fidelity thats my buddy man
I got one of these earlier this year I'll have to have a look at the glued spots and the ground spot for preventive maintenance! Thank you for the great info on this solid amp!
Happy New Year to you Dave, thanks for all the great content you've put out.
Thanks Dave and Happy New Year to you! Hoping 2022 continues to cost me big bucks buy stuff you repair and recommend!
happy new year from australia. and yes, as always we were first in line for 2022. look forward to more entertaining repairs from you 🥂
Happy New Year Dave ! I have look allmoust all last year videos that you made. Thanks!!
Happy new year Dave may the new your bring us more awesome video's from you
Have a great Year and keep up the excellent work
Happy New Year Dave ! Here's to 2022 🥂 Cheers !
Great video, I have just purchased one of these second hand and had the same problem with the right channel being quiet and distorted and your video helped me fix it as it was also the switch. Many thanks Derek.
That's a nice amplifier, old school quality, I bet that wasn't cheap in it's day.
That killer glue was a lucky find, caught it in time 😀
I know linear transformer psu's waste energy, but they don't generate nasty frequencys like switchers.
I hope you have a better new year dave, more income and lucky finds.
To me, sir, what you're doing is a beautiful show.
Happy birthday, with health and joy.
Happy new year, Dave. Hope 2022 will be better.
Happy New Year. I wish you all the best, a year full of peace and prosperity. Good Luck, budy
Nice sound from playing with balance knob ;-)
Happy new year all the very best!!!
Way to go Dave, another successful year.....some setbacks ....but well ALIVE. Keep your Harley ready for the next ride. Down here in Houston, it's forecast to hit freezing so it's going to HOG Hibernate . Be Safe and Healthy JwgK
Happy New Years Dave!
Enjoyed that.. I pulled my exact same amp out the draw and serviced it the best I could. Cheers!
Happy New year to you too. Not heard someone say "a Kodak moment" for quite a while. Look forward to more great repairs in this new year.
How about a polaroid moment.
@@12voltvids Not heard that saying. Only the Kodak moment saying. Sure they used that saying in commercials.
@@andynoon2584 a Polaroid minute was about 5 minutes. The time it took for a Polaroid to devolop.
@@12voltvids okay, thanks for letting me know. My dad had a Polaroid, was okay for quick photos, but nothing special.
Thank yoo and have a good year.
Happy New Year from Indonesia...keep on your work...hug for your cats.
A happy new year to you sir
The tube amps have a unique sound which I would class as warm; "Happy New Year Dave".
They do. That's why serious music people use them. The people that hang on specs will point out that they have higher distortion which is correct but it is even order harmonics which to the ear is not perceived as distortion. Even order harmonic produces a second order harmonic which is one octave higher than the original sound. We're listening to music produced by instruments it makes the instrument sound bigger Fuller and this is precisely why musicians use tube based amplifiers for the guitars for example. A solid state app like my technics suv9 has immeasurable distortion, 0.003%. it sounds great but it also sounds sterile. Solo State apps do provide very clean unaltered sound which technically is the best but unfortunately the ear doesn't appreciate this, the ear likes the warm sound that only vacuum tubes can produce and this is one reason that most really high-end amps will put a couple of tubes in the preamp stage to warm up they're very sterile sounding solid state apps and make them sound more like a tube app and why many people will spend big bucks and buy a tube buffer and run their sound through a tube buffer as it puts those even order harmonics back in the signal.
@@12voltvids I have the JVC A-X77 which is roughly contemporary with the Sony and your Technics SUV-9. The JVC is the first, and only, solid state amp that I've heard that is as warm and rich as a single ended tube amp, while still maintaining the clean sound of solid state. I didn't think it was possible but they really worked some magic on this one
You are right Dave my sony also have switches problems .AND HAPPY NEW YEAR GOD HEALTH .
The older Sony ES range was made to a high standard, and at least it was servicable.
Having owned a few over the years, they gave a superior performance compared to
the mass market models.
The dreaded pcb eating glue was used by a lot of manufactuers, it might have kept
components and wires in place, but as it ages it does a lot of damage.
Hope you have a better time in 2022 Dave.
Happy New Year Dave!🇨🇦🇨🇦🇨🇦🇨🇦🇨🇦
Great job! Bravo!!
Love the Sony ES series, I have had many "ES" CD players, CDP-302es, CDP-222es, CDP-111es, and my current DVP-S9000es player that I use for SACD playback. Awesome audio player and build quality with Nichicon fine gold electrolytics throughout. Had the Sony Service center, Phototronics, here in Seattle replace the optical transport about 10 years ago, so should be good to go for a quite a few more years. Any trouble areas on these to look out for? Like that crap glue?
Used to be that you could take off the whole bottom cover off most units. Happy new year.
Am I the only one or does it seem like the trace that got eaten away was leading into nowhere? It looked like it lead to a jumper wire on the other side that was not fitted. The trace came from the capacitor. It seems like it was omitted and that wire was run over to there instead. Really odd. Maybe the current capability of the jumper was deemed to be insufficient after the fact so they bodged it?
That thing with your soldering iron, I've had similar issues with that style of iron when the element gets a bit older and the thermocouple connection goes flaky. Basically if the TC opens while the iron is on it still displays the set temperature but doesn't send power to the element. If you do end up getting a replacement element/iron I've found some times the thermocouple is wired in backwards too, so it just sits there powering the element and thinking it's getting colder and colder. Switch the wires round & it works fine again.
happy new year
Happynewyear
it is a shame that they are not built like that anymore and everything is now mp3 and phones .. can't buy a nice stereo system for the home anymore just a real shame
@Keith Kneeland i still need to fix my crappy mcrypt amp it has its own will lol some times the left channel stops working ... then i need to powercycle it like 30 times for it to stay on and some times the power leds stay off when amp is on or are half bright or light up full .... think it needs a recap it seems to output half the power too now so yeah full recap me think but if you want to buy all new stereo components today it massivle expensive and you wont find a cassette deck or cd player new ... or is you do the cassette decks suck cheap mechanism no dolby cd players if you can find one are like fisherprice quality .... smartphones and mp3 players killed the home system
That dinky little soldering iron may be hot enough, but it doesn’t have the thermal mass needed to stay hot when you solder on that large copper pad. Anyway, I hope you (and any cats) had a nice, safe New Year. 😻
It's 60 watts and yes it does have enough power.
I have a Yamaha Au 900x integrated amp about 130 W 2-channel anyway every now and then I get a little bit of distortion out of the left speaker going to try and maybe deoxit a couple of the knobs switches not sure if that will fix anything I may have to take it into a shop does this a similar switches in the back like this one you're working on any advice would be appreciated thank you sir
11:31 Is this circuit glue only used on these old Sonys? I have a Technics SA-DX950 I hope they did not use it on my receiver!
Hello. There is a Sony 337esd, during playback there is a squeak with a crackling background to the sound. One channel is stronger than the other. Disks and tracks are swallowed quickly. What could be the reason?
Nice amp
That glue is a real issue. Do yourself a solid and scrape it off before you chase your tail.
It's been a problem for years in a lot of equipment. Used to cause subtle problems in sensitive circuits before it became corrosive and started eating traces and component leads.
No shit it is an issue. Why do you think i removed it.
Leaking Cap caused the corrosion?
I have one of these amps that will sometimes trip the protection when I first turn it on. Sometimes it will do it once, other times it will do it until I leave it on in protection for 10 minutes, then cycle the power switch.... Any idea where I should look for that problem?
The protection circuit is very sensitive. Check the small components in the protection circuit. Resistors capacitors and diodes.
When you spun the balance control to the left or right the sound went to the opposite speaker on my klipsch powered system connected to my computer. Any idea why that is?
Your speakers are reversed.
@@12voltvids 5 years after the install I checked and yes, yes they ARE reversed......smdh.....
What are those funky black pucks under the transparent plastic cover doing? Damping the capacitors or stabilizing them mechanically, for that matter?
?
@@12voltvids Well, there are the main caps of the power supply. They have those black round (foam?) things on top of them, which are held in place by the transparent plastic piece. I have never seen that before. Pieces of felt glued on the caps are popular, but this is different. I guess it is to stabilize the board against the weight of the caps.
@@hermannschmidt9788 To stop the plastic cover from resonating?
@@12voltvids Funny thing that. I can't see any specific purpose for that cover besides keeping the caps at their place. Japanese ingenuity 😄
I remember fixing someone's amplifier, just by un-pressing the tape monitor button, while doing work experience in a repair shop back in the 1980s. They gave it back to the customer without billing them
Well for a tape monitor button that would be expected.
@@12voltvids we'd expect so, but some places can be bastards about it. They had plenty of other work that they're making good money from. Repair shops were busy back then, when you could actually fix things
@@CameraTimDotCom the local place charges a small fortune before they even start.
Very interesting design from an engineering standpoint to get the switches all the way back and use ribbons to move them mechanically.
My Technics suv9 is the same. Keep the audio path as short as possible.
@@12voltvids My Yamaha integrated uses the ribbons but my C2a preamp uses cool looking U joints to get the knob movement to turn the switches in the rear.
You talked earlier about a telephone repair. This reminded me of the back story of the current used to ring these phones. Are you ready? The voltages is 90. The frequency is 30 cycles per second. The Bell back story is the Mr. Bell figured out that most people could only crank out 30 cycles when wanting to call some one else. Where would you find that if not at the phone company?
There were multiple ring frequencies used in party line days. 10, 20. 30. 40. 50 and 60hz and then you had tip - ground and ring - ground ringers. So 12 people could share the same tip - ring pair. The value of the capacitor and the resonent frequency of the bell determined if it would strike or not. Here the ring vintage is 120ac on top of the 52 volt loop battery voltage.
Thanks for the video .
Hell yeah I always liked the Elevated Series of Sony . SONY has very good high end speakers also they are incredable , Just cleaned all the switches on my
Sansui G8000 now it works great the tone control bypass switch was dirty b4 cleaning my left channel would cut in and out ! I spent almost 70hrs cleaning everything but i took my time love my Sansui i would like to recapp but no time 😥70hr a week worklife 😥 You wouldn't be up to recapping my Marantz 2270 would ya, I pay good because i know how much work that goes into a recapp?
I wouldn't spend 70 hours on anything. That's 2 weeks full time job. Not really interested in doing full recap jobs no matter how much i was offered. Been there done that and the guy whined and complained that i broke his amp. Was not happy with the sound. Said the new caps sounded like shit. Wanted all the old ones put back in. Didn't use the brand of caps he wanted. I said well if there was a special brand he should have supplied them. I can only put in what I can source. Never again. I trouble shoot the parts that are bad and change them.
The problem is all modern caps, every last one of them is going to sound different than caps made 40 years ago. They are made of different materials and the electrolytic is different chemically. This will change the sound and once someone is used to the sound of the old ones the new ones can have such a dramatic effect that many do not like the new sound.
@@12voltvids dam your on the money with recap . A lot of people don't want recaps because of this your correct ,
And yes the sound will change been there many times personally i am not a big fan of that long tooth sound from worn out caps . In my head new recaps puts the amp closer to the sound when the amp was new and not what I called warmed in .
And Yeah 70 hours because i took my time and cleaned every last detail of the G8000 love the amp .
But i can't blame ya for not wanting to do recaps at all and People don't pay up for the hardwork meaning they need to tip very well i have alway tipped very well atleast 2-300US ,
I had my Sansui Au 11000 recapped with Nichicons/Panasonic's caps afterwards omg that amp was on 🔥 man !! Sounded great then a friend of mine who owns a pawnshop bought from me i didn't want to sale but couldn't pass up the bread !
Thanks for the videos sorry that happened to ya love the videos anyways
And I know the G8 would be a hell of a job to recapp , We are getting fewer and fewer techs these days
@@tee-jaythestereo-bargainph2120
Las one I did was 300 plus parts and all I got was whining and complaining that it didn't sound right. Sounded fine to me. Was back and forth about 5 times with it untill finally the shop owner told him not to come back again. This was back when i was still in the business. And yes it will sound closer to how it sounded when new, but here is the thing, people get accustomed to that vintage sound. They can buy a new amp and get the new amp sound. All of a sudden their old amp that they love the sound of sounds very much like the new amp they didn't like. Thing is caps that were made 40 years ago had a totally different sound. Put all new ones in and you get closer to the sound of a modern day amp. Don't get me wrong if someone brought me an amp and threw a bunch of cash on the table and said recap it I would change every last cap in the unit and set it up but i would forwarn them that it is going to sound totally different from what they are used to.
@@12voltvids hell yeah ! Finally some1 who gets it !
Also people need to take care of the Techs ! I have always tipped large its a ruff job for sure ! I will keep you in mind I got to figure out some things but I been wanting to fix up my 2270 for a gift to Zero Fidelity thats my buddy man
What era was the ES from? Those traces look hand drawn.
That corrosive glue was built-in obsolescence.
I like to spray deoxit into a rag and huff it...Man the colorssssssss
Good old Sony bond , corrosive over time , and becomes conductive.
That's the crap alright. It's the same stuff as lepage's contact cement. Turns into a corossive resistor.
Well it is 11:58pm here in Washington state. Happy New Year, well, almost.
New video to drop at midnight.
@@12voltvids Just got the bell notification, will check it out.
Too bad if it needs maintenance, sounds like Apple.
look at the size of that Transformer this unit must weigh a ton. You can't get quality like this today unless you spend a lot of money.
Yes about 50lbs.