SONY TA-11 Amplifier Major Distorted Sound Issue Repair - Retfurb Vintage Refurb

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In this video we take a look at a vintage 1977 Sony TA11 amplifier. This unit has a major issue with sound distortion, Regardless of any operation. We will disassemble the unit, to allow access to the components. We can then fault find the issues and replace what is required. This should then hopefully rectify the problems.
These amplifiers have some common components within them, that can cause issues. We will investigate to see if they are indeed the problem.
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Vintage & retro Sony amplifiers are getting quite collectible. They produce a good quality sound and the build quality of the units feel good.
Obviously with any older Hi-Fi equipment, They need servicing to keep working as they were intended.
This particular amplifier was purchased recently with the issue, In the hope it can be restored back to the former condition.
These Sony amplifiers are beginning to become quite collectible, So it is worth keeping them from going to scrap..
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I hope you enjoy the video.
Please subscribe to the channel, So you are kept up to date when the new videos drop.
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About Retfurb.
On the channel we will be looking at all things Retro, Vintage & collectable. Along the way we will be carrying out various tasks including; refurbishments, servicing, strip downs, Repairs and much more. We aim to bring out new videos at least once a week, But will aim to release new videos more regularly.
We hope you enjoy the videos we make and please do like and subscribe.
Thank you for visiting our channel.
Retfurb
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Warning
All of our videos are intended for entertainment purposes only.
Any tasks we show on our videos, should be carried out by qualified persons only. All of the repairs, refurbs, modifications, etc can be hazardous to health. We ensure all safety precautions are carried out first, Before attempting any repairs.
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Music: Night Rider by JIGLR is licensed under a Creative Commons License.
creativecommons.org/licenses/...
Support by RFM - NCM: bit.ly/3Rvw5iJ

Опубликовано:

28 апр 2023

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Комментарии : 60

@paulb4uk Год назад

Superb work back up and running for many more years to come .

@retfurb Год назад

Thank you. 🙂

@circuitbenda 8 месяцев назад

Excellent detailed video, brilliant how you had the patience to fault find

@retfurb 8 месяцев назад

Thank you.

@anthonybarra2391 Год назад

Interesting, i dont know much about electronics but i love watching repairs, especially on retro amps. Just subscribed thanks for your time and work

@retfurb Год назад

Ah, Thank you for the kind comments. I am glad you like the videos. 🙂

@dobermanguy9437 Год назад

Take the cover off and run some deoxit on all the switches and knobs I did mine I had a similar problem it's gone

@steenj938 Месяц назад

Good work. Though I am surprised, that you did not adjust the bias current on the power amps, while the lid was off anyway...

@retfurb Месяц назад

Thank you. I didn’t think of that at the time 👍🏻

@jubemarsh2202 Год назад

Excellent work my fellow holic 🤙

@retfurb Год назад

Thank you. The comment is appreciated. 👍

@tomsi42 11 месяцев назад

This was my first amplifier - bought it back in 1978. It is a budget model, not a high end one. It was a good buy, though. And a great entry point at that time :)

@retfurb 11 месяцев назад

Ah, brilliant. I think its a nice looking amp. I wasn't too sure how high end it was and did think it was probably on the lower side. Just from the internals.

@sdjhgfkshfswdfhskljh3360 Год назад

Such high quality content needs more viewers.

@retfurb Год назад

Thank you for the kind comment.

@andymouse Год назад

Nice vid....cheers.

@retfurb Год назад

Thank you for the kind comment.👍

@KolfMAKER Год назад

Just to add an advise: when cleaning potentiometers, never use DeoxIT D5 (red label). It will dissolve the carbon resistance layer in the potentiometer. The problem will get worse and the damage to the potentiometer can only be solved by replacing it with a new potentiometer. Instead, use DeoxIT F5 (green label). F5 will clean the carbon layer without damaging it.

@retfurb Год назад

Thanks for the comment. I will bear this in mind. I previously was advised to use this type deoxit?

@KolfMAKER Год назад

@@retfurb I know, I also found out the hard way, ruining a pot. What makes it unclear is that DeoxIT does not mention any warning of use on the product. But F5 is the definitely the one you need for pots.

@retfurb Год назад

@@KolfMAKER Ok, Thank you. I will look in to getting some.

@bflsridersrepublic2999 5 месяцев назад

Hi there, I have what seems to be the exact same problem with my NAD C316BEE amp. Distortion through both the right speaker channel and also headphone when i plug them in. Can I ask how you know what resistors to. look for? The NAD 316 has loads so trying to narrow it down instead of having to remove them all to test them. Thanks

@retfurb 5 месяцев назад

Yeah, It can be difficult when trying to narrow down a problem. You will need the service manual with circuit diagrams, This will then enable you to narrow down channel circuits. It will need diagnosing checking voltage etc.

@bflsridersrepublic2999 5 месяцев назад

Ok cool, I have the service manual with the circuit diagrams. I guess I need to learn how to read them ;) @@retfurb

@retfurb 5 месяцев назад

@@bflsridersrepublic2999 ah, Atleast you have them to start with. Some ca be more difficult to read, than others. Just need to be safe with it, as it is obviously dangerous working on live components.

@EsotericArctos Год назад

Not quite sure what you expected inside a basic amplifier with audio processing. This is pretty well what I qould expect on a basic amp with basic tone controls. Just be a warning to people using DEOXIT. There are different versions of DEOXIT. Not just Deoxit, but cleaners in general. Some versions actually eat away the glue that holds the powdered carbon track on your Pot's. Just make sure you choose the right DEOXIT for the job :). Great video though. Some good processes here for people that do not have a schematic for the device. A Schematic would pinpoint, but sometimes you just have to work with what you have.

@retfurb Год назад

Thank you. Yeah, I probably was expecting more. After looking inside my TA-1150, I always think they will be similarly full. Will make a note for future videos, regarding the De-Oxit. Always appreciate additional information added to the comments, It further adds to the information. 👍

@EsotericArctos Год назад

@@retfurb Yeah, the deoxit thing is something I only found out recently too. Unfortunately I can't remember which colour it is that disolves that glue, I know there are a couple of videos on YT about it. It was a bit of an eye opener for me too,

@retfurb Год назад

@@EsotericArctos The Deoxit D5 was the one recommended to me, For this type of use. So hopefully this is the correct one. I did see some others available, But didn't look in to them as specifically looked for the D5.

@AndyHalty 3 месяца назад

Do you remember which resistors you replaced, I have the exact problem with one channel on this amplifier.

@retfurb 3 месяца назад

If you look around the 7:29 mark of the video, I point to the one side. I am pretty sure it was the opposite channel fused resistor. Do you have a service repair manual? As it will show the fused resistors on the diagram. This will hopefully show the ones I replaced.

@THOMMGB Год назад

Hi, Very good video. I'm pretty new to repairing older electronics and I learned something. I wasn't aware that there was such a thing as a fuse resistor. How can you tell the difference between a regular resistor and a fuse resistor? Where is a good place to buy replacement fuse resistors and what wattage? Thanks a lot, Tom

@retfurb Год назад

Thank you. They are more common on some units than others. This Sony amplifier has about 8 of them in total. You will need the service manual for the system you are attempting to repair. This will show the location of fuse resistors and what specification they are. 👍

@THOMMGB Год назад

@@retfurb Thanks so much for the quick reply. I should be able to find a service manual online, I would think.

@retfurb Год назад

@@THOMMGB No problems. If you need any help, Please let me know. They are relatively easy to find.

@peterlarkin762 Год назад

I have fixed a few Sony's etc. with out of spec fusable resistors. In short, although theoretically useful they were a bad choice back then. They drift with temperature so cause a lot of troubleshooting issues, and are actually a fire hazard. It's impossible to get a lot of the values that Sony used. So, I use metal film resistors that match the wattage spec. If they are on a power rail I calculate the max current and put an appropriate fuse in series with the resistor.

@retfurb Год назад

@@peterlarkin762 Thank you for this information. 🙂👍

@johnbravo7542 Год назад

I laughed when I saw the Milwaukie soldering iron,bet that was arse heavy

@retfurb Год назад

😂 Yeah, it can be a bit bulky at times. But to be fair to it, Its sometimes better than having a cable joined to it. It also heats up a lot quicker than my mains powered iron. 👍

@6ixss 6 месяцев назад

Hello! This happened to me TWICE . First sound Amplifier was *Sankyo SRC-2020* i was just listening music, not so loud, and suddenly it got blown( i think blown) sound is ultra bad and at 100% volume seems like its 2% only. and much distortion. And then i bought a power strip with surge protection (thought it was from home electricity the problem because sometimes we have outages as a small village). Then i got my second Amplifier *AKAI AM-2850* , and suddenly today it got INSANE distortion on sound, and mostly on bass. its like it got blown... it sounds like yours. Now im watching videos how to fix and what can be the problem.. damn i cant live without my amplifier loudness :( Already tried to use a different wall outlet, changed speakers and cables , but no fix. it seems something is blown inside... but theres my question . How this happened twice in 1 week? with different amplifiers? is my home electrical problem? but lights was on, no voltage drop or outage happened when they got "blown" etc. what could be the problem that fcks my amplifiers? can you help me please ?

@retfurb 6 месяцев назад

Ah, Sorry to hear you have had issues. Does sound a bit weird to have it happen so close to each other. Having said that. I would have thought there would be other issues, if there was power surges in the house. Im not sure how you can test for power surge from an outlet? Probably would need a house electrician to test or electrical supplier engineer.

@6ixss 6 месяцев назад

okay! thanks for fast reply!! What about amplifier? it needs a professional hand too? or its something that i can solder/replace? @@retfurb

@retfurb 6 месяцев назад

@@6ixss It would need someone who knows what they are looking at. Obviously it is a safety hazard, If you don't know what you are doing.

@6ixss 6 месяцев назад

well you're right..@@retfurb

@markpirateuk Год назад

Easiest way to calibrate the VU meters is use a signal generator, not that these would have been very accurate from new!

@retfurb Год назад

Ah, ok. Thanks or the additional info 🙂. I have not worked with them previously, So I tried to do it the best I could by manually adjusting. 👍

@greenfee100 Год назад

Great video but that bloody up and down music is so annoying.

@retfurb Год назад

Thank you. Do you mean the background music? 🙂. I am looking in to getting something different set up soon.

@greenfee100 Год назад

@@retfurb yes it's so annoying. Your video is otherwise great😊👍👍👍

@retfurb Год назад

@@greenfee100 😀 Sorry about that. Will look in to something else. Its always good to get this kind of feedback, As the last thing I want to do is make it annoying. 👍

@ChillToMusic87 10 месяцев назад

What music would suit you better?

@retfurb 10 месяцев назад

? @@ChillToMusic87

@FlixTV Год назад

Handling on those needle exposed VU meters is not ideal. Those are fragile, just desolder wires, don't remove from the front panel.

@retfurb Год назад

Yeah, I agree. In hindsight, I should have removed them. I won't make the same mistake again, When working with similar meters. 👍

@mnow49 Месяц назад

Do not use D5 on pots!! Use F5 instead!

@retfurb Месяц назад

Yes, this is what I now use. At the time, I was told to use that specific de-oxit. But after that video, I was told it is not the recommended one. Previous viewers commented on this also 👍🏻

@mdzacharias Год назад

So much bad technical practice - so little time. So far as I can tell ZERO actual troubleshooting before just tearing into it and doing stuff. How you did not ruin the meters with such careless handling I'll never understand. It was working much better at the end - surprising to me, frankly.

@retfurb Год назад

Thanks for the comment. All comments and opinions are welcome. To be honest there was a lot of messing around that was cut out, to save video time. The video would have been a couple hours long, If it was not cut down. Also, I do agree with the comment on the meters, I should have removed these completely. 👍

@mdzacharias Год назад

@@retfurb Sorry if I was harsh. I don't remember if this applies to your video but one thing that bugs me even with some of the best techs on RU-vid is that they generally do NOT open for a visual inspection first thing, even before plugging it in. You wouldn't believe some of the things I've seen inside some of this stuff. Safety hazards.

@retfurb Год назад

@@mdzacharias No, It's good to get some feedback on the video. I had already had a quick look inside, Just to make sure no obvious issues. Like I said in the last reply, I did cut a lot out. Which I should have explained further in the video. I also did go through all capacitor checks, Which I don't think I mentioned at all (or showed). 👍