Faulty 600W Sterling Power Quasi Sine Wave Inverter | Can I FIX it?
ฝัง
- เผยแพร่เมื่อ 12 ม.ค. 2024
- Hello! In this video we're going to be looking at a faulty 600W Sterling Power Quasi Sine Wave Inverter. Was it a bargain? or Was it a bust? Come and join me as I try and repair it, and we'll find out together!
I'm not an expert, but I do enjoy trying to fix things.
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#electronics #electronicsrepair #repair
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I love the waveform - "quasi sine wave" meaning the typical "not at all sine wave like" :-)
😂😂😂😂👍
-Mom, can we have sine wave at home?
-We have sine wave at home.
The sine wave at home:
but I want a Square wave....😂
One of the worse sine waves I've ever seen
"quasi" in this case meaning clipping?
I really appreciate the addition of the text commentary, like when you put the extra info about "looking for usually 0.4-0.75" when checking transistors.
Thanks, it also helps fill in the gaps where I forget to speak as I'm thinking. It's sometimes hard to work stuff out in your head while trying not to have loads of just silence 🙂👍
Many years ago in the early 90's, I worked as an engineer in the marine industry.
I've seen many Stirling products, mostly battery chargers with a very high failure rate.
I had conversations with Charles Stirling (founder), He always denied his products were reponsible for boiling batteries his chargers were connected to.
In the end, we had a policy of no longer installing Stirling.
Interesting story, thanks for sharing 👍🙂
The sign of a true professional; while unpacking the inverter - "oh look there's the manual" immediately slings it aside :)
😂😂😂😂👍
When it said "quasi" sine wave it wasn't joking was it?😀 nice fix
Thanks Shaun 👍
Sine wave with flat bits. No inductors in that thing for filtering whatsoever!
Square wave inverter. Nice fix.
Thanks 👍
Always inspired to find and fix stuff. I have an app on phone called Olio, a lady was giving away a 32 inch Samsung TV, it would eventually come on but there was a loud crackling clicking noise as it tried. Thought I'd have a go at it, carrying it home it wasn't light lol. Did a bit of research and seems 1000uf 10v surface mounted electrolytic caps fail under the shield by the processor chip on main board. They're the squat one's not the tall ones, tricky to spot a partially bloated one, the heat shield gave it away, crusty dark grey circle. I actually ripped a trace removing one but fixed it with a strand of solder wick lol. So for a couple of quid for the caps I've got a free TV but the input ports on the back are ideal for a large monitor and that's what I'm using it for. Yes you are right if 1 mosfet blew especially with a power supply should replace all, survivors took a kicking.
Thanks 👍and nice one on the TV 🙂
Nice work on the TV 👍😊
Bargain! Whether you keep it or sell it, that was a good repair. Quasi sine wave🤨 Always enjoy watching these trouble shooting, diagnosis and repairs. Smart stuff sir.
Thanks 👍
Quasi sine wave = not sine wave.......
I finished the exact same repair on the exact same inverter, earlier this week, apart from it was the other two MOSFETs that had failed on mine 😀. As someone else has mentioned, the original fuses are 3x30A.
Nice work👍and thanks for letting me know. I was just being cautious with the fuses, I usually find a large piece of copper wire or a bent nail might be a little too much 😂😂😂
That's surprisingly large! I'd have guessed 20 A considering fuses usually have a fairly generous time/current trip curve (i.e. you can overload them quite considerably for a surprisingly long time).
Assuming nominal values were used for the design I'd say 600 W/12 V = 50 A, so even 3x20 would be more than that. A guesstimated fusing current of 1.5 would mean the fuses would in theory supply up to 900 W for up to an hour with a single 50 A fuse (or two 25), i.e. 3x20 A would be plenty for 600 W continuous.
Thank you for your hard work! You are a master at electronics.
I have been playing with electronics for 30 years and im still no where near your level of mastery. I watch every video you put out and I always learn something. Even if it's just patience. Thank you!
Thanks Kevin 👍I wouldn't say a master, just persistence and a bit of luck perhaps 😂😂There is still a lot of stuff I don't know and I'm sure there are a lot more cleverer people out there than me 🙂
I don't how critical it is for switch mode power supplies for the
MosFet's to be a matched set or not, but if it is, then when this
power supply Fails I would highly recommend you order 10
matched sets of MosFets from the same manufactured batch,
and once you get them you match them to each other using
ideally a component checker or Multimeter, in short if they
don't match well one will worker harder than the other ergo
once it goes the other goes quite quickly after it, if you have a
Thermal Camera you can actually detect how much more one
is operating if the match isn't sufficient, yup I learned the hard
way..
Interesting, thanks for the advice 👍
Usually 30a fuses in these. Sterling power inverters used to be made in Taiwan by Genius Power. Maplin inverters were from the same source and a lot cheaper than the Sterling badged one's. A good bit of kit. I used to sell them, under a different name again!
Thanks for the info! Yes I did think it looked well made 👍
God that takes me back a bit, we got one for one of our sons, guess who played it the most Yep I hang my head in shame it was me, evertime I could get the chance I was on it, loved that game...glad you brought it back to life...cheers bud...
I'm not sure if you commented on the right video as I've not played inverter before 😂
May have been said before it might be an idea to prechar ge an inverter to stop the capacitors drawing large amount of current and rogering something , thanks for all the videos all excellent and ineresting .
Thanks 👍
Sitting here watching as I do some strap stuff then cleaning parts of my Xbox One I got for £4 prior to installing a new 1540 motherboard and dvd board. I do like the soft tones of the Geordie accent, I spent a week up there around 2008 meeting up with my old World of Warcraft guild and what an awesome time it was esp in the pub outside the Metro where I collected a ton of bird's phone numbers as they jus' adored my south London wide boy accent hehehehe
Thanks 👍Glad you like the accent 🙂
You've earned a new subscriber, excellent repair!🍺🍺
Thanks and welcome. I've actually done some pretty crazy repairs on things, and also some reverse engineering! Check out the FLIR thermal camera video, or the AverMedia device I looked at a few videos back. I've also looked at a medical ultrasound scanner which I made run doom too 🙂
About time that somebody on Utube does a “ physical visual inspection”for newbies, on mosfets and the like”. Whack on continuity and let the beeps be your “eyes.” No technical knowledge needed, ……If you hear a beep between any two points, on the component,regardless of the way the probes are, the mosfets, Bjt’s or transistors are snookered.
Nice one boss. All of a sudden, the technical data pales to grey.
Ps, this is one of the primary beeping things to check after power cables, switches and buttons , (after the initial power adapter.test). 90 percent of board fixing completed. Next , test diodes ,resistors, fuses and capacitors for a short to ground and then 7 years of technical theory, comes down to a probable 95 percent fix of a board with a couple of beeps.
Thanks Bones 👍 Much appreciated 🙂
Thanks for giving an overall description of how everything works.
Glad it was helpful!👍
Wayyy to brave with that hoover over the mat 😂😂😂
😂😂😂😂
@@BuyitFixit my spelling there was terrible 🤦🤣👀
Thanks for your efforts to share and teach. Please remember to always drain and verify zero on the main/big/high-voltage caps, before working on the unit. We want you to stick around. Just a friendly reminder. On switch-mode converters, such as this, I always replace the main caps. They seem to be one of the typical failure points. If the main caps were getting weak, could that contribute to the poor shape of the output waveform?
Thanks for the advice. I'm not sure about the output waveform. It could have been because of the load. It seemed perfect with the near maximum load on it.
@@BuyitFixit Yep, that cooker thing probably had a lot of inductance. I'm guessing, here.
Resistance dropping the voltage I would think.
Over the years I have repaired many of Stirlings products, some of them have been very good quality (like the pure sinewave ones made by Rich Electric in Taiwan). There have also been some that have been overpriced tat with questionable safety issues.
Interesting, Thanks for letting me know 👍
Awesome 😎😎😎 you are doing great 🤩🤩🤩
Thank you so much 😀
Gave it life! Nice work.
Yes! Thank you!
Brilliant repair as always, thanks Mick 😀
Thanks Mike 👍
Another awesome video 👍
Made my crappy week SOOOO much better! THANKS YOU!
Thanks 👍Glad you enjoyed it!
Nice work.
Thanks!
Nice job, thanks for sharing.
Thanks Brian 👍
Great video as always! You are the best. ❤
Thanks 😊👍
saved to electronics list for when i get my mofes and start looking at my inverter thanks for the info
Glad to help 👍
Lovely job Mick I always love your methodical fault finding and no doubt you get the right results 😊
Cheers Gary 👍
Nice easy fix for you. Well done!
Thanks 👍
great video as always
Thanks Paul 👍
Nice work 👍
Thank you 👍
That was a great repair mate. Those inverters can be wicked to repair sometimes. 👍👍
Thanks mate👍
Really good video, I liked the 3 shots of the job, oscilloscope and the thermal camera. It was a nice touch to prove everything at once 👍😊 it can cater for everyone's level of understanding and seeing the waveform they mention, thanks for the extra effort 👍 looking forward to the next one 😊
Thanks mate 👍
Good job
Thanks 👍
Awesome repair (of course) but that's not what I call a Sinewave ! but any port in a storm....cheers.
Thanks Andymouse 👍
Broken Square wave if at all. Great video anyway. Thank you I learned a better way to diagnose Mosfets now too.
Thanks Fred👍Glad it was helpful 🙂
Another nice find and fix. All bought and sorted for what? a tenner? Nice 🙂
Thanks Marc 👍Yes about £10 🙂
01:04 😳😳😱 did you turn on your personal nuclear reactor???🤣🤣
25:45 😳😳 again.. at my home the light is fluctates🤣🤣
Good repair vid👍👍👍🥳
Thanks 👍.😂😂😂No it was the camera auto iris cutting in due to the light reflected from the white cardboard lid of the box 🙂
lol fuhjyyu, those caps were part of the capacitor plague back in the day.
They still are to this day. I call them fuhkyyu's.
Thanks, I didn't know that 👍
just ordered some k4145 mosfets for my 1500 watt inverter that blew up
Nice, hopefully it goes well. I'd check the diodes etc around the area just to be sure.
What brand solder wick do you use? Even with tonnes of flux, a hotter iron and fresh solder I struggle to get the solder to absorb into the wick like yours. Really enjoying your content, keep up the great videos 👍
It should be in the video description of my last few videos along with other tools as I seemed to be getting asked this a lot. Thanks for the support 👍
I'm new here, maybe u can add FLIR camera to check temperature on pcb
Hey, welcome aboard. I've got a thermal camera, in fact I actually repaired a FLIR on the channel, although I'm not that keen on them as a company, if you get a chance check out the video and you'll see why!
hi was that a modified sine inverter going by the waveform, excellent repair
Thanks 👍
Liked seeing the output on the scope (what a messy waveform😂) and the explanation of how the device works, really helpful. Are you happy with that Hantek scope, would you buy it again now that you have used it for a while? Also would a device like that with a near square wave output damage AC equipment do you think? Cheers Mick for another great video.
Thanks Vince 👍Yes overall I'm happy with the scope. It's sometimes a little slow refreshing (compared to an analogue scope) but it does have the advantage of being able to capture a waveform and let you zoom in and also save stills to USB. I perhaps should have got the Rigol scope instead. The only reason is that it does protocol decoding so it shows bytes of data on things like serial or I2C which is something that I would personally find useful. On the inverter, it does say that it won't work on some AC equipment. I think it would depend on the device. For instance most power supplies take the AC, then rectify it to DC, and smooth it with a capacitor before doing anything so that would probably be OK, but something like an AC motor might struggle with it.
@@BuyitFixit Cheers Mick 👍
Really good to watch a professional at work
I wish I knew one 😂😂😂😂👍
One hour, two FETs and three fuses well spent.
Thanks Jim 👍
Have you got a po box? I have a few sets of brand new test leads you can have for nowt
Feel free to drop me an email. It's the channel name at out look dot com. 👍
You can also test the capacitors using a ESR meter👍
I think that using the fluke on capacitance range gave enough info on the capacitors to prove function. You would really need to remove them from the board to get accurate information about the esr values and it wasn't necessary in this case to prove if they were working or not. He has a multifunction meter that he has used in older videos that can measure esr but these did not look blown and read very close to the stated values when tested, it's more about fixing the item than removing everything and testing each component 😊👍 hope that helps you understand why he did not use an esr test this time around.
@@thetraindriver01 I understand that he is using the fluke for capacitance measurements.
But with an esr or lcr measurement you can also read the internal resistance thats also very important when doing capacitors.
1 thing is for sure the way he tackles the problem and finf the solution is great.👍
@ottospoelstra2481 I agree with what you are saying, I do. But there is no point in using a bazooka to kill a fly, smallest effort needed to prove it works first, it showed the cap was OK to a point when just going over the caps. A strange reading would have certainly prompted a more in depth look with a machine that could test esr and as most would do, change the cap as they are inexpensive and one of the main components prone to failure all on their own through age or cycling👍😊
Hi mate,I tried what you said to repair inverter but still nothing, could I send to you to have a look,powers up,12v side but no 240v output,don't mind paying for repair,only in dh4 postcode,thanks very much Steve,ps love the channel
Hi Steve, I used to live in DH6. I'm a fair distance from there now. Drop me an email it's the channel name at out look dot com
Play pretty much move the decimal point over to on all that electronic stuff
Milwaukee Hoover . . . . 😅 and your car is a Kia Volvo? Allow me to clean this mess with some Bounty Brawn paper towels . . . and clean my dishes with some Dawn Cascade . . . . 🤣
Yes, I know when I said it although you're the first to mention. We just call them hoovers although it's not been an actual hoover for years 😂😂
@@BuyitFixit in some parts of the US we call all face tissues Kleenex, but we wouldn't combine brand names like "Puffs Kleenex"
In the uk, most people hoover up, or hoover the carpet. Or at least that's what they say around these parts of the UK.
Well done, another save from landfill. That sign wave is a stretch of the imagination and I was surprised that the input FETs had no heatsink. I wonder whether that cupcake maker is suitable for Yorkshire puds.
Thanks Ralph 👍the case is just one large heatsink. I'm not so sure on Yorkshire puds, it probably wouldn't get hot enough 🙂
hi what has cused the short and why have the rest not shorted ?
Mosfets can just fail, or it could have been caused by a short circuit on the output. Hard to tell. Once the first lot failed short circuit, the fuses would have blown and prevented further damage.
you waited for the caps to discharge right ? could you have shorted them out if in a hurry ?
True, but I had other things to tend to anyway 🙂
@@BuyitFixit that's a fair reason :)
2 mosfets run one leg of the 240 and the other 2 run the other leg.
Conformal coat (in this case, only on the shiny HV bit) is awful stuff for repairs.
Yes agree, I've had a few nightmares with it especially in a few of the Milwaukee tools.
The main question is: "Why did it blow up?" There must be a reason. Maybe the specs are underrated or operating close to limits what it can handle. Simply replacing it can result in the same error after a while, this is not a solution. The maximum gate voltage of the IRF80 is pretty low, only 20v max. It is possible there are spikes that exceeds this voltage (probably at startup or shutdown) and damage the mosfet after a while. I think I had searched for a better alternative replacement.
Sometimes components just fail. I repaired a few CRT TVs back in the day where line output transistors would fail, just replacing them and they were good again.
Hmmm modified Sine Wave Inverter. i have bad experiences, equipment that malfunctions.
Pure sine wave inverter costs double but is much better.
Yes, not the best but probably ok for a cupcake maker 😂😂😂😂👍
I don't like cupcakes
@@lexpee 😂😂😂😂
Yes, modified sine wave is ok for a resistive load such as a cupcake heater.
electric machines, tools work also good with modified sine wave. not sensitive electronics.
I use for almost 20 years an Victron pure sine wave inverter dutch quality that is one off the best.
I have a 2kw sine wave inverter that has a isolated power supply daughter board on it that has failed.
I did look at a 2kw one a while back, however it was just fuses that had blown due to it being connected up wrong.
No matter what that’s worth the price lol
Yes, probably for the parts alone. I've now got to find a use for it 😂😂😂
quasi = look alike but look closer isnt at all. :D LOL
😂😂😂👍
Fan checked? Didn't move on power up at 26:29.
Only moves once is has a load. It was going when I had the cup cake maker on it.
When did 600W inverters cost hundreds of pounds? Even a Pure Sinewave one would be less than 200, and more than 600W at that. Amazon does a nice looking one with good reviews for £85
I think this 600W retails for around £110 (perhaps something to do with the brand?) although I paid just over £5 for it.
Can I fix it, the cupcake version. 😂
😂😂😂😂
Farting at 17:07? 😃
😂😂😂Creaky chair. I really need to have a look at it, it creaks every time I move on the bloody thing.
Lmao it sounded like it 😂
Based on the wave form on your oscilloscope it is a modified square wave and not a sine wave.
Marketing at it's best 😂😂😂
"Quasi sine wave"? Wtf? That's rather a "quasi almost perfect square" 😄
Yes 😂😂😂😂😂
eugh! fuhkyyu capacitors. Change them immediately. Im surprised they're not leaking or bulging on the top. They are probably what caused the MOSFETS to fail.
Thanks Simon 👍I just noticed your other comment 🙂
Or the previous owner overloaded it. IRF840s are only 8A. You could replace them with 15N50, which are 500V 15A.
Cupcakeinator
😂😂😂😂😂
Fun fact: An inverted sinewave is still a sinewave.
😂yes indeed 👍
They shouldn't be allowed to use the term "quasi"
Perhaps it is the Chinese translation of Square, as it does have a few similar letters 😂
@@BuyitFixit "Square sine", they're into oxymorons, the Chinese, aren't they?
Storing a table of values (probably PWM) in a ROM to make the Quasi part. Yuck!