Repairing A BOSE Wave Radio Alarm Clock
ฝัง
- เผยแพร่เมื่อ 4 ต.ค. 2024
- I bought a broken / faulty BOSE Wave Radio Alarm Clock from that well known auction site.. Come with me as I attempt to diagnose the fault and repair it!
#electronics #electronicsrepair #electronicscreators
bose radio repair
bose radio fix
bose radio alarm clock repair
bose radio alarm clock fix
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What i absolutely love about this channel is that you get to see the whole diagnosis, even when it gets a bit puzzling, not shutting the video down and hunting for it off camera. We see all the good bits but also see the puzzling bits, we are learning together and thats what makes this one of the best electronic repair channels. Thankyou!
Thanks Darren👍Yes the idea is to show how I work out and solve problems so others can do the same. Really glad you find it useful and thank you for your support 🙂
You forgot to mention we get to see the disassembly of the project being repaired....Priceless!!🎉😊
Yes I was shouting " you have left the inductor disconnected!" but you couldn't hear me . Well done for remembering in the end 👍
😂😂😂Thanks Mike 👍
Thanks! I have the same radio and the exact symptom (voltages not correct at the 12v regulator), I pulled the 1000 uf cap and viola I had regulated 12v back!!! Thanks for your work, I had this broken radio sitting around for over a year and now it’s fixed. Keep up the fine work
Brilliant Jim 👍 This is one of the reasons why I make my videos to help other people such as yourself. Really pleased it helped out and you managed to repair your radio. Well done👏👏👏👏👏
So a single capacitor pulling the voltage down, but the skill is finding it, cheers
Thanks Andy!
Yeah, it kind of threw me for a bit, as the input to the voltage regulator should have been above 12v, and it measured around 14v with it removed, so I thought the input supply was OK. Hence my thinking it was something after that pulling it down. That's why I removed the inductor to isolate anything on the output part of the circuit.
After that it still wasn't right, so I looked at the input side of the voltage regulator and found the problem!
@@BuyitFixit Mick, it all takes time and knowledge combined with trial and error, plus some blind faith. Any thoughts on my recent electric kiln vid? cheers
@@TheInfoworks Hi Andy,
I've just had a look. I've not had much experience with kilns :) With the contactor being 4 pole, and you converting it to single phase, I'd use two of the poles for the live, and two for the neutral to spread the load across it, but you probably already know that, just you didn't mention it on the video. I bet it will be bloody expensive to run on electric as you said, but I think the price of gas is also going to be expensive too!
@@BuyitFixit Mick, the 12 KW was I'm sure was installed to get a quick firing. I'm just wondering if a detuned 3 KW will get to a temperature of 1040 C, or would the losses be so bad that any temperature rise will be negated. If so where would it stall, the experiment would probably consume 30 KW Hrs. Hmm, is it worth it? Cheers
I suppose it depends on how well insulated it is compared to the thermal loss over time? I think you would just have to try it and see?
That device is over 10 years old, and based on some reading I did many years ago, Electrolytic Capacitors have a performance life span of 10 years. Troubleshooting these cap's in circuit doesn't always revel good readings, so removing them for testing is best practice. Excellent works sir.
Thanks 👍agree testing in circuit can give false readings due to the other components in the circuit.
Great video, Very interesting.
I have the same radio in my bedroom and it died a couple of years ago. Completely dead. No display and no audio.
After fighting to get it apart, like you, I found the fault was a surface mount transistor that was wired with a zener to be a 5 volt regulator.
With no 5 volts to the logic circuitry, it was no go. A new transistor and it has been going strong for the last 2 years. I do love BOSE!!
The only other problem was that the wires to the speakers were covered with stick-on foam. To stop them potentially rattling, I guess?
The foam had completely disintegrated and was a right pain to remove.
Thanks 👍and great job on repairing your radio too! 🙂
You will probably find more capacitors on their way out in the future.
I bought one of these about a decade ago from a man who worked for Bose factory service repairing these. He had gone through and replaced all the bad capacitors, marginal components and made some engineering changes. Even so, a curious defect remained. When first plugged in, the radio would produce full volume static for about a minute and then it'd power on like nothing happened. The seller was completely honest about the issue, so I knew of it going in.
Curiously, if one installed the backup batteries, that power on problem stopped happening.
One day it stopped powering up at all, so I started going through it. You'll find another linear voltage regulator (a 7805) in there. If memory serves, it's on the display board. Even with the benefit of the factory service literature, I never found the problem. All the voltages were correct at the places where they were supposed to be. Eventually, I parted the thing out to save others. I could only guess that maybe the microcontroller conked out, perhaps due to the undiscovered fault that caused trouble at power on?
Now, years later, I've got another one that, like the one you repaired, doesn't power up properly, or powers up erratically. Maybe I'll have better luck with it.
I have to be honest -- although the Wave is a nice sounding radio, I find the build quality and some parts of the design a bit questionable (such as the very high input voltage to the 12 volt regulator).
Thanks for that, yes someone else mentioned about replacing the other capacitors. The radio you mentioned does sound a weird fault. I wonder if there was some kind of mute circuit that wasn't being reset properly? Hopefully you'll have better luck with this other radio.
That was a hard one, but you won the battle. Great job.👍👍
Thanks 🙂👍
Nice! Excellent fault finding tekkers, great job 👍
Thanks very much Steve! Much appreciated! It's Mick btw. Unfortunately I don't have you're rapping or plastic melting skills. Your channel seems to be doing really well! Keep up the great work! Nice!
U interested in doing one of those too? I'm having a hard time with the one my father left me - but I'm not nearly as skilled as the both of you...
Vince, you absolutely amaze me. Your methods are basic but you always, well almost always get thejob done. Good job mate, from the USA.
Vince? 😂😂😂
@@BuyitFixitMy Mate Mick 😉
I got one of these at a yard sale and it was the best sounding audio system that I've ever heard. Sadly it died but I still have the speakers/waveguide assembly so I can hook a car radio to it or an amplifier to it. This thing was full of capacitors and many of them needed changing but I ended up breaking the traces off the board and I scrapped the whole thing except the speakers. Wasn't worth my time but I got a free CD out of it too. Yes there was a CD inside.
Yes someone else mentioned about the sound quality too. Nice little unit 🙂👍
Best repair channel on YT hands down!
Thanks 👍Hope you have a great new year!
Early on I thought you could have stuck some batteries into it to quickly rule out the AC side of things. But nevertheless, I'm glad I stumbled across this video; I've been looking for a channel like this for years and TH-cam finally decided to deliver!
Thanks, hopefully you'll also check out my other videos you might find something else useful or interesting 🙂👍
@@BuyitFixit Oh, no doubt! I've always loved taking things apart like this since I was a kid, but I never had the knowledge about how to diagnose them properly. Anything more than a broken wire or a burned out component and I was at a loss!
I'll be binging this channel over the next few weeks.. 🙂
@@JoeBob79569 Thanks👍I used to love talking things apart as a kid too, and still do.. hmm does that make me a kid still 😂😂😂😂Anyway I'm no expert but I have fixed a lot of stuff!
I think the batteries are for the alarm clock memory backup, they don't power the radio.
Yes, I've seen a few clocks with backup batteries to time keep in a power outage and keep the station memory.
Good to see some old stuff repairing, I did spotted one more mistake, by that I mean the rest of electrolytes. I'm from Poland, so I would start from checking capacitors, like in almost every old polish amplifiers😉
Yes, good idea.
Great fix and detective skills , as an amateur I’d have to take components off and test , so your very quick 👍
Thanks G! Sometimes it may take a while longer than the video and I have to edit out the boring parts, so don't take the length of video as the time taken to actually repair it.
For a company that used to have a good rep for audio gear, I'd say the quality of that radio was disappointing. Good fix though, Mick. Have to agree with others, I like the way you show us your mistakes as well as the success. It's a great way for muppets like me to learn. You, and Mr SolderFix are my go to for this stuff. You have given me the confidence to get on with restoring my vintage HiFi stuff. You've also cost me a bloody fortune in tools.....😡😆
😂😂😂Cheers mate 👍
I just found your channel.........very nice..........I have a similar Bose with same symptoms.......... will put it on the bench and have a go.......... heat kills electrolytic caps, all that dust didn't help and the cap is near the transformer which could be a heat generator...........cheers, Mike K1FNX near Boston
Cheers Mike 👍
My grandfather has one of these somewhere in storage. Amazing lil thing
Nice 👍
Wow that reminds me of the expensive clock radios you could get back in the late 80' early 90', great work bringing it back to life, can wait to see the soldering iron video 😉
Thanks Morten! Yes I bet it was expensive! I did notice on the transformer a code of 42 / 95 which I guess means week 42 of 95 so I think it's probably 1996?
You should hear it. That radio was way ahead of its time.
Superbe work. I am from the 50's and fixed things for decades. That Bose was almost imposible to buy in Argentina. Cheers fron Patagonia
Thank you, and thanks for the lovely comment 🙂👍
I remember these were 349.00 to purchase from Bose They are called acoustic wave great loud clear audio. Found mine at will good for weight it works perfectly.
Nice 👍Thanks for sharing 🙂
Goodwill?
I found a couple at an electronics salvage dealer, one is still waiting for me to dig into it and see why it's not working...
Seems like capacitors often are the culprit?
Yep, the electrolyte inside of them dries out over time or they leak and go bad.
fair play to your perserverance, they made it difficult for you to repair like most manufacturers, hats off to you sir. Thanks for sharing.
And thank you to for commenting 🙂👍
Well resurrected. Yes, when the regulator was out the 13.5V at the input was a clue (the 7812 will dropout at anything less than 14V). 23V input is pushing it, depending on what current is being drawn. As well as the Quicktest you may want to build yourself a dim bulb tester (just in case) if you don't already have one.
Thanks Ralph!
That is quite the voltage drop across that regulator, I bet it generates a lot of heat - possibly explains the failure of the capacitor which looks to be quite close to the heatsink, maybe it has gradually dried out over time. Failure by design do you think?
A friend of mine bought a micro DAB hifi on eBay for a great price, when it was delivered it was dead. The listing said it was for spares or repairs only, but he didn't read that. I took it apart for him and found the 5v standby rail was dead, replaced the 5v regulator and off it went singing like a canary. £1.50 fix! Luvvly Jubbly Rodderz.
Nice 👍well done 🙂
Now that was a very satisfying video indeed. Love your knowledge of what is what and am learning all the time.Many thanks
Glad you enjoyed it 👍
Alright - you got me. I think that I hear you mentioned on My Mate Vinces channel and it just so happens that not only do I own a Wave radio, but I think it's one of the best devices going to throw haunting levels of pleasing music to corners of your house that you wouldn't think possible from a small device. On with the show.
Thanks 👍
I would have changed out those other 2 large caps besides the one you replaced. Good chance they're on their way out the door too.
Good idea. Probably should have!
I like watching your Videos, for its Technical and informative content, I have learnt a lot from your Videos. I have been into repair mostly on industrial grade electronics for quite many years now. Would appreciate if you keep it that way, rather than adding a few Satirical clips in between.
No problem, I did try a few different things. Can't quite remember what was on this exact video,but I mainly just add the 'a few moments later ' as sometimes the video would look wrong if I just suddenly jump from one thing to another.
Enjoyed video. ESR those caps in circuit. I always replace the small caps in old electronics regardless of appearance.
Thanks and good tip 👍
Yeah I noticed you didn't solder that inductor back in .... Those Bose radios used to sell for for around 300 USD back in the 90's , you got a real good deal on yours ...
Thanks Cajun. The radio wouldn't work without the inductor, I might have edited that part out accidentally. Yes pretty good deal! Thanks again!
I just got this and it sounds like one of the greatest audio systems I've heard in my life. It's seriously space magic.
Nowhere near as good sounding as the Proton clock radios though
I'll have to see if I can find a broken one 😂😂😂😂
@@BuyitFixit Bought mine from harrods about 30 years ago, still working perfect.
Standard linear voltage regulator has minimum voltage drop of about 2 volts, so 7812 regulator needs a least 14 volts on the input. When you measured only 13.6 on the input (25:03), I thought fault must be on the transformer side. Love your videos.
Thanks 👍Yes I wasn't sure if the 13.6 might have been just enough but I guess not.
Bloody capacitors - if the item is old, suspect the caps, even if they look normal! That and connectors between boards. I routinely pull all the connectors, spray them with contact cleaner and try again. I shouted to you to resolder the inductor, but you didn't hear me, mate 🙂 Well done on rescuing a nice piece of work!
😂😂😂👍Thanks 🙂
Thanks for a great troubleshooting video!
You're very welcome SpiffR 👍Hopefully you'll check out some of my other stuff!
When I was in the Biz we had Sam's photo facts for everything.
I've never heard of that before, I had to google it to see what it was 😂😂😂 Looks quite interesting. Thanks for commenting 👍
Great diag and repair. I think maybe you should have replaced all the electrolytics on an old dog like that but hey, it works!
Thanks 🙂👍
Nice repair, but PLEASE get a switched mains cable or something... if you haven't already. I was twitching every time your thumb squeezed around the live parts of the PCB while you were removing the cable, then again while you were grabbing the metal body of the transformer to accomplish the same goal. Sphincter tightening stuff!
Good idea Harry. Perhaps it makes for better viewing without one though? 😂😂😂
Nice repair. Monday night thought: is it mandatory for solder reels to be beat up and broken? I think every engineer I've ever known has a roll of solder that looks like it's been through the wars, including mine 😁
Yes of course it is! Didn't you get the memo?? I'll have to chase them up!
I have one still in use that is so old, its Radio Shack label on it.
Well done young man, nice to see a fellow north easterner doing his thing. I take it your from Newcastle as a guess.
Thanks Richard, originally a little further South than Newcastle, but over in Cumbria now.
@@BuyitFixit Nice video mate 👍 I’m originally from Sunderland now living in Canada. Back home for a fish lot this coming October and maybe some Minchella’s ice cream at Whitburn cliffs cannot beat it. Enjoy Cumbria bud. Wishing you all the best
Very good work! So patient.
Thanks you, much appreciated 👍
Interesting video, i have one of these radios , get a good antenna connected or the matching cd player , awesome sounds will fill your room
Cool, thanks👍
Nice one! So they are using half wave rectification for the controls pwr supply? That always seems to torture the capacitor to death no matter the quality. Probably wants a 50V or higher rating cap for longer life.
Was the failed cap a quality brand ? I've noticed the quality brands tend to often fail less visually detectably (no doming). I think the rubber bung design on good caps allows controlled venting out the bottom..
Thanks Gann. I can't remember but it would have probably been a branded cap, and yes just half wave via one diode it seems! I didn't trace the circuit far enough, but I guess the microcontroller supply is derived from the 12v line somewhere along the line...
Consider discharging the capacitors after a test and a bench power supply to bring 12v after any regulators to look for the short. This might reduce the time it takes to find the error and save you a shock.
Thanks for the tips 👍
Nicely done and not an expensive fix to bring new life back to ewaste. Maybe look into getting a Quicktest Mains Connector Safe Block for future mains connected devices.
Good idea. I used to use one at work years back, but I haven't got one now. I'll see if I can get one!
Ah yes... the old Wave Radios... I spent my time repairing these and making a decent profit on them until the market started jacking up the broken ones. Oh well, it was fun while it lasted.
I suppose it's like anything unfortunately, good while it lasts...
Far out ! Nice job.
Thanks Peat Moss 👍
These LM78 regs need at least 2V more at the input than at the output. After measuring 13 V with the reg out of the circuit, it was clear that this input was suspiciously low 😅
38:29 Here I was literally pointing at the monitor and shouting "The LEG, the LEG, you forgot the LEG" haha
😂😂😂😂😂
Did the FM section of the radio work? In my experience, when the radio scans all of the FM channels, something is wrong with the FM reception. I like the easy fixes when replacing a capacitor solves the non-working problem.
We get very little reception around here, as we are quite remote and in a valley with mountains all around. I only get a good signal if I walk up the drive to the top of the hill. The walls in the house are stone and 2ft thick so reception in the house even on a mobile phone is a challenge!
Did that model have AUX in? Would have been good to hear it working. It was a great device, and I think they upgraded with CD player later.
I did see the model with the CD player built in. I'm pretty sure the one I repaired doesn't have an aux in unfortunately.
Good job Mick 👍👍
Thanks Vince!
Lets BIN IT ! its BOSE 😀
😂😂😂
Excellent job my man ! 😊
Thank you Mike! Much appreciated!
Well done, thanks for sharing.
Thanks Brian 👍Thanks for taking time to let me know 🙂
Here's a hint: When checking the voltage on a power supply filter capacitor switch to AC volts. If you have a large value of AC volts you have an open capacitor. Keep the change. ;-)
Good tip! Never thought of that. Thanks 👍
Mick, more than once, I used the, “Bones, can you save him?” “He’s dead Jim” in comments to you. Was that a shout out to me or am I being arrogant?
😂😂😂😂👍
Lucky you with having the inductor out when powering it with the cable in reverse. If power had been there, some other components would have seen +12V and could have been damaged. But you must have luck from time to time.
I never noticed it was reversed? I just had a look at the video as it's quite an old one and couldn't see anything. I've done much better video's and much more complicated repairs but for some reason TH-cam seems to be pushing this one out 🤷♂️
Is there a video of you repairing the soldering iron?!?!
If it's the Aixun T3A I was using then yes, there's a video of repairing that on my channel.
Get a ESR meter! It measures the series impedance inside the capacitor! Even if the capacitance is correct the esr can be high! It generates a signal about 100Khz and calculates the impedance! Only costs about £50! Fraser.
Thanks for the advice. I've since got one of those component testers which does ESR too, this video is from nearly 2 years ago 🙂
I wonder how many people were screaming at their screens lol THE INDUCTOR!! 😂
Yes I was thinking the same when watching it back 😂😂
I was. I was also shouting at the screen when you were wasting time messing about with the screen. "Thou shall check voltages!" ALWAYS check the voltages at the output from the power supply before you go any where else. They wouldn't use a 35V cap unless the voltage was near or above 25V. When you measured 13.5V at the input to the regulator i knew straight away that the problem was a bad capacitor. If you had connected a scope, you would've seen the ripple. The others near the regulator are probably lower capacitance than they should be as well.
Good advice, thanks Simon 👍
Well done eyes open too lear 43:00 n from it .... thanks for the vid 👍
You're welcome 👍
Hi, for clarity, is the inductor in series with the output of the voltage regulator, therefore with one leg disconnected all power is removed from the brains of the operation?
Yes in series. The output of the regulator goes through the inductor (probably for noise suppression or filtering) then to the rest of the circuit.
Lol nice. Looking forward to the solder iron video.
Thanks j s! It might be next on the list. It was a job to get this one out today. Was recording and editing until 3am last night as had been a bit under the weather the last few days!
@@BuyitFixit oh no! Hope you feel better! Thanks! Woof that's a long time editing and staying up late
@@wherami Yeah didnt start recording until late time I got everything done, was recording until about midnight then editing until about 2.20am or so.. Because we only have a very slow connection I got up around 4am to start the upload going! Everyone had sickness for a couple of days and seems I may have developed a kidney stone.. that's life I suppose... :)
Great job.
Thanks Andy 👍👍
Why don't you start from the testing of power supply? 99 pcnt of the faults is the faults of PS.
Yes someone else suggested that too. I'm no expert 🙂 for some reason TH-cam has been pushing this video, and I've done much better work than this such as the RGB laser or thermal camera, or solar inverter repair and then having to reverse engineer the software to get a service password as the company wouldn't help.
Good videos, don't stop. @@BuyitFixit
How do you expect to have 12V on output on that 7812 when on input you have 12v, so you need higher Volt's on input to have 12v on output.
Guess I didn't realise at the time. I'm not perfect and do make mistakes 🙂
@@BuyitFixit I like when someone answer on some critics, most of them don't answer or just try to humiliate you, but you just simple do the right thing, and I follow you so long, and learn much from you. Keep going bro. 😊😊
Excellent insight into diagnostics. Does that little T7 tester work in circuit or only disconnected components?
I'm currently on with a hifi system that randomly goes full volume. Volume control knob is a continuous 360° type plumbed into a XOR & Flip Flop circuit.
After that I'm on with reverse engineering/reusing a DVD VF Display as it has a combined microcontroller and VFD driver all in one square chip.
It should, but it would depend if any other components are wired in parallel perhaps. Your project sounds interesting.
@@BuyitFixit yep. A simple potentiometer would be essy to replace. Unit is pretty old, 90s if not earlier. I was gifted an oscilloscope for a birthday recently so plan on piping the clock into one channel and signal from the pot to another.
Have You Thought Of Testing The Ribbon Cable?
Why? That wasn't the problem.
Should have went straight to that power supply regulator from the get go,too much time on the display, good work otherwise
Good point, Thanks for commenting.
I use compressed air after the toothbrush 😂
Thanks for the tip 👍
“Anyone spot my mistake” at 37:55 not re-soldered the component back in the board? 😂 Easily done!
Yep, it is 😂😂😂
Jeez. Why wouldnt you disconnect the fragile ribbon cable before turning it all about diagnosing it? Especially since your filming so others could see better..
Good shout, yes I probably should have. Guess we all make mistakes 🤷♂️
Hi, my CD is not working. Please suggest. Regards.
It could be something as simple as the lens could need cleaning.
Standard repair for old Bose kit, first thing you do is replace the major caps 🤣
Not like a 1950 five tube/valve radio, is it? 😀😀
I've not looked at one of those....yet..😉
Would you like a link to someone to watch?
"I wonder if this capacitor could be bad." Of course it's bad. They're all bad. Some are just worse than others.
😂😂😂👍
Capacitors are like flat roofs, they all fail eventually
Yes indeed 👍
Repairing a. Bose. Wave. Radio. Alarm. Clock
These were 800 dollars back then
Quite a pricey unit back in the day..👍
that screen is not sitting square in its socket
Timeless or not as the case may be.🤣🤣🤣
😂😂😂👍
😂😂😂😂👍
That's a lot of nicotine, must have stunk.
I think it was UV discoloration, a lot of older white plastic suffers from it. You can make something called retro bright to make it white again.
i was really looking for him to poke that screwdriver through the speaker... lol... really careless with the screwdriver...
Yes looking back at the video it was a little close.
@@BuyitFixit to be truthful tho... this did help me... i've got one that the display goes off and on as you move the cord... but even when on it doesn't respond to anything... i'm going to first replace the components you highlighted... thanks...
Invest in some proper flux remover. It is 100% better than IPA.
I'll look into that. Thanks Don!
Came from a Smoker's house?
I'm not 100%, as it didn't smell of smoke. I think it's UV damage as it was more on one side than the other. Some old plastics have a tendency to do that.
A Knockoff Bose Wave Radio? The build looks unlike anything Bose engineers... Consumer electronic work if they work.
No, it's a proper Bose product 🤷♂️
Nice job for a North Eastener.
Beats coal mining hands down any day of the week.
It seems you have 2 TH-cam Gods who are happy with your work too. ( Stezstix & My mate Vince )
I have already subscribed and congratulate you on your increasing popularity.
Thank you kindly sir! 👍 Yes originally from the Northeast but over Cumbria way now.
Great that you read my new comment on your 5 month old video.
It shows you are paying attention to the growth and health of your channel Mick.
Now i must get back to work on my washing machine motor electric bike,converted to AC to DC
I did a video on it 2 years ago but my TH-cam got hacked so i deleted everything and will start posting again in the summer.
All the best with your life in beautiful Cumbria & good luck with your TH-cam channel.
Thanks! I remember a few years back converting a car alternator to a 3 phase motor to try and make an electric bike lol. Good luck with yours too! 👍