Portable CD Player / Radio / MP3 Music Player Repair. How to Understand and Fix radio circuits.

[@dubiouscircuits]

1:11:15 sums up my confidence in electronics, but I’m hoping watching more of your videos will change that.

[@kevinfroment2668]

Jack of all trades, master of none, but often better then master of one!

[@spaceted3977]

Brilliant !!!! I would call that a Mind Boggling Repair !!!! I would have given up on it !!!! It's difficult trying to figure out where the Circuit Goes !!!! Amazing Repair !!!!

[@theshemullet]

Do I want more of these types of videos? Absolutely. As much as maybe the money is in repairing GPU's, this is the type of thing I love to see. Repairing everyday objects. Saving them from the dump. Really, these are class, like the wind-up torch/radio. These are your best videos in my opinion. Everyday objects that all people use. I love to see it. Thank you for this type of content, how you can repair stuff around the house (that's what's more useful to a general repair technician). Your CPU/GPU videos are brilliant too. #righttorepair

[@standishgeezer]

An invaluable test tool I put together for myself is a 'signal tracer' consisting of a small enclosure with an old probe and a ground lead connected to a simple LM386 amplifier (9v battery operated) and a tiny scrap speaker. Hardly Hifi but is brilliant for tracing/confirming a signal path. May be a nice little project for your channel? Apologies if you've already done this but since you did not use such a tool here, I assumed you hadn't. Cheers

[@bittertruth6575]

Thank you Richard. Your videos are thrilling not just educational! Better than any M Night Shyamalan movie, especially with the twists at the end where everything comes together so nicely.

[@mohammadalrasho5025]

Thank you for sharing the valuable information.its the first time i understand Radio in my life.🙂

[@ThomasEnder_pt]

Thank you so much for your Channel. It is rather difficult to find competent people who are able to easily explain what circuits do. Everybody talks about components but none, unlike you explain what the circuit does and how we manage to identify faults.. thank you so much Sir

[@Flowtester1]

I have learned more in the last 2 weeks watching your videos than I have in the last 5 years watching other videos. I really like your teaching style. I’m so thankful that you are on you tube. PS they are called alligator clips not crocodile clips😂

[@karsaifalo]

Great video Again Richard ! Also dont forget the full quote :) "Jack of all trades, master of none, but offentimes better than a master of one"

[@davesdigitaldomain]

Yes Richard, get any old junk and make some great videos out of them 🙂 that was an awesome video. Now I understand how radios work, just enough to be able to troubleshoot them. Looking forward to the next video.

[@LearnElectronicsRepair]

And at the end of the day 'just enough' knowledge is all that you need 😀

[@nigelfewster]

Catching up on some of the videos I have missed as usual very informative. More of these type of repairs I enjoy the diagnostic process.

[@Jon_Oates]

Really enjoy watching you troubleshoot ordinary household items and small commercial equipment. Great fun! Can you show us a bit of the island, car boot sale, clubs/bar locations where you fix things etc?

[@Jon_Oates]

Just seen your new car boot salvage video. Thanks for that!

[@cymap]

What a fantastic video. The way you fault find for us methodically and then have some theory and finally show us on the schematic the very terms you have just explained was (for a beginner like me) brilliant. Please do more of these and thanks again for sharing your knowledge with us.

[@johngregory1803]

If you continue to make videos like this, everyone will want you to work on them 24/7.

[@atifservicecenter]

This kind of videos are make my days lot better, and that’s just because of you Richard Sir 🙏🏻 We didn’t received this kind of knowledge/Information from our College/University. Thank you so much from the bottom of my heart 💓 I really learned lot from your videos, I learned about reverse engineering, tracing the whole circuit and lots more more. You are my Guru Ji 🙏🏻🙏🏻

[@keithcitizen4855]

Definitely enjoyed this video learning about the radio IC with oscilloscope visual explained.

[@igorrizvic6008]

So basicly when you dont have a voltage on an ic or a condensator... that is an audio output..you just make a connection with a wire and it works...bad trackpad..I mean the rusted one got it.....thanks for sharing ...nice video...keep up the good work.

[@castlecodersltd]

Another great video. I like how you show the warts (your mistakes) and all. Plus you talk through them. Very natural. Keep it up

[@andycnm]

Yes yes yes very much enjoyed your little delve into radio. I have been a radio ham for many years and your explanation of a receiver was the best I have heard! very enjoyable. Andy M0CNM😀

[@kennymanchester]

I have come to accept as law that the fault is almost certainly on the bottom of the most difficult - pain in the butt - PCB to test. Fun video as usual. I'm trying to get up the gumption to try pulling apart a once fancy Canon L1 Video Camera that was notorious for bad tantalum caps in the 80's. I'm certain that will be an adventure! Oh, and you did pretty good on the radio theory and superhet block diagram ; Amateur Radio Op NZ5I

[@sivoltage]

great video, would love to see more radio stuff, its amazing!

[@ciocclaude]

Jack of all trades but knowledgeable indeed. Keep it up and thank you

[@patkelley8293]

I liked the idea you get into anything and learn something new. Very informative!

[@Xorat]

Hey Richard, really enjoyed the video! Cant stress enough how great the new multimeter is for the viewing experience! Keep it up!

[@LearnElectronicsRepair]

Hi Daniel, nice to see you are still around. Yeah the Kaiweets multimeter is really nice and I thoroughly recommend it. As you can see I've branched out a little bit with the repair topics but I think it keeps things interesting to look at some different items. 🙂

[@Xorat]

@@LearnElectronicsRepair have never been gone. Still watch basicly every Video of yours! The great Thing is, that such a Basic and cheap Item has so much potential to teach you about electronics! Because No matter If expensive GPU or a CD Player you can apply very similar fault finding to both which is great if you want to get into repair, but want to try and learn first before going for expensive stuff !

[@seeithappen1]

Its been a long time since I have seen a Ferrite Rod Coil AM Antenna and a tuning capacitor. Nice to see them again. I think you should be able to hear the BBC on AM.

[@LearnElectronicsRepair]

Yeah it is a while since I saw a Ferrite Rod antenna too. Possibly there are some AM transmissions to receive here but my workshop is enclosed in the shopping centre so maybe I just don't get a good signal. I have one FM station about 10 metres away from me.

[@robinsattahip2376]

I've had AM radios that flat out would not work on a switch mode bench power supply, nothing but static like you got. The FM worked fine. I didn't see how you were powering that thing. Some of those cheap radios even have linear power supplies in them.

[@skysurfhf]

Thanks ... For learning... To us ... Greatings from Portugal 🇵🇹 🌟

[@mgb961]

best teacher ever, generous and valuable L video...merci

[@Simon-mz7sf]

Well done. Fancy both CH AF pcb tracks being corroded.

[@binarybox.binarybox]

An interesting video, Richard. I like watching fault finding videos. I've used Tektronix scopes since the 70's and have a 466 atm.

[@shanenorman7262]

Very engaging and educational

[@FireandFrostHVAC]

This was an excellent video.

[@theoloutlaw]

Wow, just great excellent content again! Your way of troubleshooting is the most easiest way of understanding to me, and I've watched many youtuber's who 'fart' around too much, but your straight in, going straight to the problematic areas, using a few methods to test. What blows me away for a lot of these, all your doing is using a Mulitimeter! Most others have a tonne of expensive gear they love showing off to use to repair which a lot of us 'tinkerers', seriously cannot afford. Hey, maybe one day you could take some Q&A request of Electronic Questions that 'baffle' us from some of us wanna be's and apply to some of your videos to explain? Thanks for making my day with your vid's.! Rick

[@LearnElectronicsRepair]

I do have live streaming on my list of things to do so yeah I could try something like that. You are completely right, I have some expensive kit here too but mostly I try to get by with the cheapest stuff I can as I know many viewers don't have access to higher end kit. And mostly you don't need it. I only use the oscilloscope when I really have to, and then I mainly use my 40 year old analog scope (though those are going UP in price/value I notice). Actually maybe I should get some old faulty test equipment ot try and repair for the fun of it 😉

[@theoloutlaw]

@@LearnElectronicsRepair Yeap, and for someone like me in Australia, good analog scopes and test gear command stupid prices, so I love the repairs with as limited gear as possible and you thoroughly use the many settings of the multimeter too, which shows what a necessity it is for anybody even getting started with basic repair. Cheers Richard, look forward to the next one :)

[@mart43]

​@@theoloutlaw But I thought you lived relatively close to China, you would think that cheap china stuff would be abundant in Australia. Like cheap test gear.

[@theoloutlaw]

@@mart43 Plenty of things like CD/DVD players, AV receivers, TV's, but just not the good old analog test gear like those in America seem to pick up at yard sales. Signal generators, tube/valve testers, scopes, VU mulitimeters etc...

[@mart43]

@@theoloutlaw mmm, you can always ship stuff from ebay, but I understand that is far from ideal.

[@rahulmechatronics]

Good one Richard !!! Quite informative

[@daz41262010]

yeah really enjoyed this one :) great fault finding and trace repair :)

[@obeahman6286]

It was an adventure 👍

[@fanfan-tz2tk]

2 problems. Yes an interesting one ! Thanks

[@sprinter768]

Very good video again, as always.

[@Dutch_off_grid_homesteading]

Heya 1st time I see someone (you) explaining some parts of AM/FM I would love to understand more indept circuit. I see more components on the bord but have no Idee of it's workings

[@anthonydenn4345]

Nice video. That radio module looks a lot older than the rest of the unit.

[@78vinyl97]

Another great video.keep up the good work.

[@nigelholland24]

great learning video thanks.

[@antitheist2000]

Definitely more videos like this 😊

[@davidclark3603]

That was really good that, thanks!

[@henrybartlett1986]

Love these.

[@alibali4445]

This was a fun one

[@Dark_Knight_USA]

Greetings: Q: The light U speak of as current limit. It is a 40W or 60W? Then again I should ask what line voltage U have there. I figured the bulb at 120VAC. I use the same idea however I use different bulbs 4 different applications, I also have a PR57, extraordinary senses including good heat sensitivity.

[@zedcarr6128]

If you connect a long piece of wire outside to the telescopic aerial, you should deffo pick up something on Medium Wave even if you are thousands of miles from a transmitter, especially at night. Lower frequencies 1 to 15MHz propagate better at night and higher frequencies 15 to 30MHz, better during the day in the HF Bands, as a rule of thumb. Any radio hams or SWLs will give you a more informed answer, I'm sure.

[@akdenyer]

What microscope are you using? Great videos lot of interesting stuff about PC’s I did not know.

[@LearnElectronicsRepair]

This one www.aliexpress.com/item/1005001842060150.html

[@jonathanhawken2081]

great video, would your cheap oscilloscope have been good enough to check the frequency?

[@LearnElectronicsRepair]

Actually I don't know, but I could test it and let you know. I wasn't really interested in the frequency so much, more I wanted to know whether it was oscillating or not😉

[@djjuice9780]

Thank You Sir.

[@tenminutetokyo2643]

Do a 2600 Jr. Console.

[@stevedebeukelaer1424]

Hi richard i would like to see more. Of this. I am strubbling with itt saub lorenz from 1968 transistor radio. It is working but sound what comes out is very low. You can adjust it with volume potention meter but sound still low volume. I can not find anythin low. Can it be the end transistor npn and pnp. I do not know they measure good with my multimeter. Can you give meadvise on it what i can check on it. It is wedding present ( it is familial sentimatic value for the father of my girlfriend.)

[@LearnElectronicsRepair]

I would suggest replace any electrolytic capacitors. Also this radio could be using Germanium transistors which may have lost gain over the years. The same could be true for old silicon transistors of course. The only way to test this would be to remove them, and use a tester (or build a test circuit) to measure the gain and compare with the datasheet. It is also possible some resistor(s) have also gone high value with age but this usually happens in high voltage circuits.

[@stevedebeukelaer1424]

@@LearnElectronicsRepair hi yea they use germanium transistor in t03 package . Yeah measure everything and replace already capacitors. But it hell to work on it no place. With all wires etc..

[@mart43]

@@stevedebeukelaer1424 weird curiosity but your last name sounds very dutch do you come from a dutch family? it is just a guess.

[@stevedebeukelaer1424]

@@mart43 i am from belgium

[@mart43]

@@stevedebeukelaer1424 ah, cool

[@Dark_Knight_USA]

Greetings: "Jack of all trades, master of none". U having said that developed much respect from me. Perhaps I should B less critical in my reviews. Me- also Jack of all trades, but master of many. I think U could have used ¼ of the Vid time and probably less real time 2 diagnose this. I could have. I figure U do it 4 educational purposes. No worries. 4 the newbies, less experienced and knowledgeable I hope it was educational. Fact is this basically entertainment and/or info 2day as it is a replace world not a repair world. 30 yrs and beyond we could make a buck but not on that stuff. $30/hr bench charge and it went back out the front door 5 minutes after it came in without it getting on paper. It was said we were pricing ourselves out of the market. $50 bench and above was a good rate 4 Pro audio and the big stuff. The general consumer electronics rate I mentioned above was competitive and worthwhile 2 the consumer of decent devices. Ppl now think I should base my rate on what they paid less depreciation. Hence the reason I quit repair of consumer electronics 20 yrs ago. I still repair. I changed markets." Adapt and overcome". Same Ppl's mentality tho. Thx 4 the upload.

[@theshemullet]

Was it Marconi or was Tesla?

[@MrProtector65]

Would you believe it, switched on similer type radio, nothing, played around with it 3 -4 hours, binded it, should have put it in the loft for later, ah well, next time, regards.

[@jonathanrose456]

Comment for the gods

[@snipersquad100]

At @1:04:10 That sound your picking up are UFO's

[@patkelley8293]

Fun fact - WD40 and a lighter will light up any cockroach. Not that I've actually done that.😉

[@robertpatton6700]

it's harder for me to follow without the Closed Captions available

[@LearnElectronicsRepair]

If you wait a few hours after I publish, then KZbin automatically adds the close caption. I don't do it myself or have the option to do so

[@robertpatton6700]

@@LearnElectronicsRepair Thank you

[@tenminutetokyo2643]

Use Deoxit, not WD_40.

[@verttikoo2052]

You have to do this in Spanish. I know a person who would think that you are a hero. He just doesn’t understand English at all 😕