We’re also super happy that you support our favorite TH-camr, thank you for that @PCBWay! Fun fact: I never watch sponsor segments, but I always watch them in Vince’s channel, since he goes the extra mile to make them tailored to each video.
What I love about Vince's videos is he gets as excited as I do when I fix something that joy of making something broken work again is one of my favourite things and impossible to fake.
My sister had a roomba that was broken out of the box. From watching your videos, I knew that there was a chance something came unplugged during transit. And sure enough, that was the issue. Love your videos Vince!
An optocoupler can be seen next to the DC jack which means that that transformer is part of a switch mode power supply and not a linear one. The shottky diode does the high frequency rectification and also protects the circuit from DC going back to the transformer.
Yes, the schottky diode is for rectification, and after it failed, the dc voltage shorted across the coil. The coil is just a piece of wire for dc voltage, so it's like you basically connect the contacts together.
On the charger the diode that you took off does the rectification. One diode is a half wave rectifier. Therefore when plugged into the mains it was dumping 12V AC where it should be 12V DC, When you plugged in the DC it was going through the faulty diode and transformer to ground instead of being blocked by the diode.
Perfect, thank you PDS, I knew the viewers would have the answers. I haven't heard from you in what seems like an eternity. You keeping well? Are you still volunteering at the laptop for the community place?
@@Mymatevince Hi Vince I'm doing good. I stopped volunteering at that place about a year ago. I just wasn't enjoying it anymore. I've been going the gym and I still do 3D art in blender. So I been keeping myself busy.
Yes. Also the small transformer is probably for a switch mode circuit, a linear transformer would be much bigger. It looks like there's some sort of combined pwm ic and FET package on the other side of the transformer.
Just to clarify what the shorted diode is for. It is the output rectifier for the switch mode power supply transformer. If you plug the mains lead in the switch mode power supply won't work because that diode is needed to convert the AC output of the switch mode power supply into DC.
Thanks as always for a great video, Vince. I have to say, I'm sorry to hear of your current predicament and I'm sure I'm not alone in wishing for a speedy and agreeable resolve for you. As a dad who has the occasional happy ponder over old photos of his kids, I was quite literally smiling along with you as you brought your old photos to life on the now repaired gadget. Really great stuff. Thanks again for a great vid!
10 years of working with helicopters and really large FLIRs, and this is the first time I've ever seen one that small. Or not pronounced "fleer!" This video was so fun! The Kodak thing really made me smile, honestly. That's a really neat gizmo.
31:11 A transformer is a coil that loops to ground. The diode is there exactly to prevent the 12v in from going true the transformer back to ground when the mains is not being used. That explains why the 12v in was not working but doesn't explain why the AC wasn't. As you said 39:36 if the diode is shorted and acting as a wire the AC side should just work normally. Since it isn't, it means there is most likely something bad going on on the AC side. And 40:13 I don't think just replacing the diode will be enough to fix it.
My husband and I send our best wishes as you deal with your issue and have to say thank you for sharing your Journey of fixes with us all In your own way you have given me a break from the sorrow of the loss of my Mom so I hope the Joy and peace you provide us, with all your fixes comes back to you and your family a thousandfold
Vince, you can make a bypass light bulb to limit the mains current in case something is shorted. It's just placing a light bulb in series with one of the mains wires. If the thing you are testing is shorted it will just light up and avoid damaging it more (and prevent a fire too)
The faulty diode on the Nitecore battery charger was shorting the DC supply and also the AC coming from the transformer. The diode was sinking all the current provided by the transformer and pulling the voltage output of the transformer down, which is why it heated up. As for the humming, without the diode the switch mode power supply has no load, in an effort to keep the output voltage at 12v the switching frequency gets dropped all the way down which probably caused some coil-whine in the audible range.
More more more ;) That diode is a TVS Diode - Transient Voltage Suppression. Probably for reverse current protection. The AC side probably generates the voltage the DC jack provides - so both will be shorted by that same diode?!? Best PCB Way adverts btw - I watched all of it!!!
@35:00 you're confused about the AC voltage. The diode you removed, makes it DC. By just being one diode and not a makes the DC output very choppy, which then is probably smoothed out by a condenser.
Always a pleasure to get a "chill easy fix" video after some hard battles you earned it! Also I never saw that Kodak machine, it might come in handy for a friend who has a ton of those negatives from the past (with french president Jacque Chirac and the Mauritanian president at the time no less!) but he has no money to develop them for an expo thanks Vince!
Really sorry to hear about your predicament & the effect it's having on you! Gotta say i think your the most positive person I've ever watched on TH-cam! I know in time it WILL all be resolved & as the saying goes "you can't keep a good man down" Hope you do get it all sorted sooner rather than later 👍🏻
@@Mymatevince Glad to hear that & your very welcome! 👍🏻 You've given me & millions of others loads of great content so my kind words are the very least i can do 🙂
Hi Vince, nice and straight forward fixes! Thanks for the entertainment! I am sorry to hear for what you are going through. I hope you manage to sort it out. Good luck!
Just make sure when dusting the scanner interior that you check for dust on the now-working backlight. Judging on the fact they're in the same spot AND in focus, that's where i suspect those bits of dust are.
I’ve scanned several thousand negatives and slides over the years and the worst issue is usually dust on the back light, once you know the film is clean. I just blow with a lens blower and that usually sorts it.
Hi My Mate Vince, The reason you would get no output on the battery charger secondary side is the that feedback see no voltage and shunts down the primary side of the power supply, I Would not plug in a power supply without that rectifying diode can cause the primary side to blow up with no feedback, That diode is under extreme stress and is a common failure point, I would go with a higher Amp rating to get it to last longer, great video 👍👍👍👍👍👍👍👍
35:40 in this shot, it looks like the negative rod on the left is touching the positive connection, hard to see from a one dimension perspective but if they were touching each other perhaps the noise was contributed by this? Also, why you don't have enough faith in your work by now? You're always expecting a 'bang' to go off. I can tell you that I have faith in your work, don't be so hard on yourself. Besides we all love a bang now and then it adds the dramatic effect! Keep on doing what you're doing, Vince and I hope things get sorted in your favour. Remember, it's not worth worrying about something if it is not in your control.
The battery charger uses an isolated switching power supply topology called a flyback converter. The transformer is actually a coupled choke (because it stores energy) with one primary and several secondary windings. There will be a FET switching rectified mains across the primary at high frequency. The secondary circuits just have a single diode and capacitor each. The circuit is arranged so when the primary FET is on, all the secondary side diodes are reverse biassed, and current ramps up in the primary. Then when the FET turns off, the ampere-turns are delivered into the secondaries. If one dc output capacitor has lower volts per turn than the others then it gets all the primary energy for that cycle. If one of the secondary rectifiers blows short circuit then the primary winding sees a big reflected capacitance which will cause it to current limit as soon as the FET turns on, so the other outputs will get very little charge supplied to them. All the best.
I'm really glad I live somewhere where I don't have be paranoid of mains power. I've changed outlets without turning off the power. I used to work with an electrician that would check the power by wetting his fingers and touching the wires.
Really entertaining, I'm a big fan of the channel. Regarding the short shotky diod, my simple reasoning is that it's dividing the ac transformer secondary side from the dc part of the circuit. Once the diod semiconductor matures to a full conductor, it passes the dc 12v (from the bench supply) to the transformer, which when fed dc, acts just like a wire short to the ground through the other end of the secondary transformer coil.
I have had problems with my Power-A Xbox wired controllers. My sons started first with the buttons under the analog sticks stopped registering button presses. then the triggers LB and RB(top shoulders) stopped. Ended up the micro switches were bad. Luckily i had a few junk VCRs that had a bunch of switches in them. After i fixed his controller within a week my controller started acting up! Buttons not working at all. Love the videos!
I'm not an electronics engineer, but my father was. A Diode of that type (your battery charger fix) is meant to allow electrical flow to go one way only. If a diode shorts out, it allows electricity to flow back into the circuit, causing the fault. Neither the AC or DC side will work because of the placement of this diode, taking it out did allow the 12V side to work, so once you replace it with a good diode, you should be golden. Also pay close attention to the direction of the diode's placement, that dictates the current flow.
I hope you get your conflict resolved. Conflicts like this don't only affect money but also ones mental wellbeing. Stay strong, I am sure it will get resolved.
Great video Vince, when you revisit it, check the diode at D4 as that left leg looks dodgy where it's soldered to the board, I'm a vaper and use one of these chargers for 18650's and 21700's and I can tell you this is a fault I've seen myself and has resulted in 2 burnt out boards on both the ones I had, one literally went into a melted mess it got that hot, I've since changed manufacturer.
These silly fixes are the easiest and very rewarding. It reminds me of when I bought a Davis Vantage Vue for parts/not working. And the problem was that the transmitter with all the sensors were transmitting on a different channel than the console was receiving. I think :D
The photo scanner is the same issue I had with a video projector my sister bought. No light. They didn’t have any more stock and gave her a refund. They didn’t want it back so she popped into my house and I took it to bits to what was wrong. The projection led wasn’t plugged in, the plug was sitting on top of the pins. I pushed it on properly and it lit up and threw a nice big picture on the wall
Another great video, Vince 😀 I'd happily buy the Kodak Scanza from you as I've just been given 1000+ 35mm slides to digitise by my Dad!!! Slides from 70's and 80's
Great Video Vince. Nice easy fix on the first couple of items. The battery charger I was cringing when you were going to plug it in, as I thought it wouldn't like it. The diode you removed IS the rectifier that converts the HF AC into DC. The power supply would have had no feedback to regulate itself and it would have started upping the frequency to compensate. The reason the DC side would not work is because the diode was shorted it was feeding back into the transformer. Hope that makes sense, and hope you get your legal troubles sorted out. Best wishes Mick.
Indeed, the two diodes that connect to the AC leads act to as a rectifier by blocking the AC in one direction, resulting in presumably something approaching 12VDC on the other side, joining where the 12VDC input jack is inserted. This also separates the 12VDC and AC side from each other, as the diodes block current going from the DC side to the AC side. When they're not shorted, obviously.
It does make sense Mick. Thank you. Just in case you might know...What would be the outcome of upping the frequency, a high pitched noise i presume, but would the voltage shoot up from approx. 12AC? Or would it just risk damaging the transformer or switching I/C. I haven't caught up with your channel since I've been on my hols. I'll try and get a couple in later after 'walk the line' Johnny Cash film 😂😎
@@Mymatevince I'm not 100% on the potential damage, but I'm sure it wouldn't do it much good 😂😂😂Yes I was wondering if everything was ok your end as you haven't commented on any of my videos for while and was going to drop you an email to see if everything was ok. My channel seems to be gaining a bit momentum at the moment, look forward to seeing your comments when you get time. Thanks Vince 👍👍👍
Hi Vince, love watching your uploads. I have a DVD TV and the DVD doesn’t work have you done any repairs on a TV DVD by any chance please. Keep your uploads going. 👏👍🏴👏👍🏴
31:20 the short is going thru transformer to ground.Damaged diode with output capacitor are rectifing ac. Any 3A schotky diode should be good.The diode was damaged because overheating,should be bigger diode.
If you are feeding AC into the circuit, every half cycle you are reverse biasing the circuit via the shorted diode. The diode is required to only allow the positive pulses through into the circuit and the capacitors will remove the ripple from the pulsed positive DC. The shorted diode also allows the positive side of the DC to back-feed into the AC supply circuit possibly getting shorted by the transformer secondary to the negative supply side.
Don’t remove a diode from the secondary side of a smps! The problems isn’t that it is no load, but there is no feedback to the opto-coupler. If you’re unlucky the primary side blows! Because the opto-coupler is used for the feedback/regulation of the secondary voltage, by removing the diode, the opto-coupler has no reference voltage so it ‘thinks’ there isn’t any voltage and it lets the primary side oscillate a it’s maximum witch often results in a short circuited power mosfet, or if you’re really unlucky: everything blows in the primary.
the diode you removed is a high frequency rectfier, this power supply is a HF one, like a PC one. so the fast diode you have removed is the rectifier you were looking for. you could have removed one from an old PC ps and soldered in place, even if its not a SMD.
It measures shorted because you're putting DC across the transformer secondary winding, which looks like a short circuit....it's a coiled wire, but still just a wire to DC.
I've got money this battery charger was wired up for 120v AC for north America and doesn't have a rectifier for 240 built in. 120v American will have 1 line neutral and having another leg of power fed into probably shorts out that diode! Let me know your thoughts
Don’t know if anyone has mentioned it but when you connected the power lead to your extension and turned it on one of the silver rods was touching the middle pin creating a circuit
Another great video! Liked & subscribed. Could you recommend a beginner multimeter, as I’d like to have a go at fixing an old radio I have. Thanks. Mike, Wimbledon 🇬🇧
Since the diode was shorted, the DC voltage input was flowing through the diode into the secondary winding of the transformer (shorting the +ve with the GND)
Very nice fixes :) Surprisingly expensive that film negative scanner, bought one in 2015 for about 30 Euros, altough mine doesn't have the screen or memorycard slot, it works only with computer via usb cable. It was fun going through old negatives and scan them. Found some pics, that were never made as a paper photos, because they were incomplete or had failed otherwise one way or another. Still, they had interesting enough material, that I scanned them, for example from summer holiday trip in summer of 1985. My parents enjoyed seeing those pics as well after all these years :) Dust tends to be a problem though, had to clean the negatives, and the scanner multiple times during the scanning. Luckily the scanner came with cleaning kit, so it was easy to do.
Thanks. Yeah the dust really shows up on them. I gave it a blast with the datavac, but I haven't tried any since. Interesting to heat about the cheaper version. Thanks for sharing👍
I have a battery charger for a drill and after some testing, I realised that the external power pack for it was faulty. It passed 24v AC into the charger. It seems hard to find the right power supply for it but I can get around it by supplying DC into the correct point on the board.
I love watching your videos Vince! And I'm so happy to see the Rolls coming together! During COVID lockdowns I found your channel through Elliott along with Steve over at Tronicsfix. I'm an IT professional and was already a computer expert but I wouldn't have had the confidence to start fixing other stuff if it wasn't for y'all. I run a tiny local repair business out of my house and I've just recently started filming stuff to put on the channel I made for it (Don't Panic Tech Solutions). Thanks for your inspiration!
That was a really entertaining and enjoyable video! I love seeing electronic items fixed, and I also like fixing things myself (so long as I have the tools and knowledge to do so). Sorry to hear about the situation you were in. If given the opportunity, I would happily buy one (or both) of the Xbox controllers and the Nitecore charger. I wouldn't even use the mains input as I have plenty of 12V DC chargers lying around (from when I've stripped apart TiVo boxes).
i suspect that diode is the rectification diode for the transformer output and with it shorted the transformer winding is directly connected across the power rail
It's a half wave rectified supply, hence no bridge. A scope would show a series of positive humps perhaps stretched out by capacitance. Just a diode. Standard for battery charging.The dc is traveling back through the secondary of the transformer to ground because the blown diode is allowing it. dc frequency = 0 so 2 pi fL= 0 dc sees transformer coil as a short!
When u have ac voltage coming from a transformer u can make a bridge rectifier with 1,2 or 4 diode with one diode depending upon the position it can turn to negative or positive
0:57 that breakaway cable is the same used on the wired xbox 360 controller (and counterfeit controllers does not have a breakaway cable most times, which makes easier to spot a genuine xbox 360 controller).And that breakaway connector can be purchased separately if you lost the one that came with the controller. The volume control is something that I really miss on the Xbox one /series controller. Unfortunately, Both Microsoft and Sony does not allow third parties to make wireless controllers for their consoles, this is why you can't get Microsoft / Sony 3rd party endorsed wireless joypads from brands like 8bitdo and the ones shown in thr video.
I am not surprised by the easy fixes, I used to buy pallets of returns and the vast majority were either not faulty or a simple fix. It wouldn’t have been economically viable if the majority had actual faults due to component failure.
this diode is for rectifier to DC voltage , when the diode is short all 12 v DC is short because it connected directly to secondary on transformer , one pin GND the other pin B+ they connected together by the diode
Good, albeit straightforward fixes. Diode oring (without anything else) is not the best design for a DC / Ac capable device. If one of the diodes (one leg of the bridge) goes short on the AC side then, when DC is connected, a high current can pass into the transformer.
I could hear the worry in your voice vince. Don't stress about your current situation. The truth always comes out . Just do as much research as you can . Cover all the bases . Stay strong 💪
Just watched one if your vids from 4 yyrs back , 1st time seen ,I believe, Tomy chatbot.. Wow, left comments there.. do you recall and possibly do or done a video ,on Tomy Hoom dorm ?? Cool toy for its time too !! And they're only just now creating a vehicle ,that works on same principle .. bar the large air pump !! The air pod !!
I've just Googled it and I've never seen one before...I'm going to look out for a faulty one 😂 If you see one on my channel in the future then you know it was because of you!!! 👍👍👍👍
@@Mymatevince no worries friend, I thought this may intrigue yourself!! And glad to be of help !! Keep up the tinkering .... I got named Mr take to bits by one of my primary school teacher.... Don't see why , it was only a biro pen ............ erm oops
@@Mymatevince erm ,I get carried away by my thoughts at times , yet the pinball machine , you repaired .. With the single mechanisms, that made the bumpers and clutch systems work .... If you pictured it right... I guess it stemmed from hiw the cotton Mills works , or other such mechanical areas.. With the combination if electric , then computing, like a mish mash of sorts ... So always intruding to see what's inside. Unlike amstrad hi fis ........ Less said.... Look at the high quality hifis of the 80s ,even ow end.....sound quality etc To what we have today ,..... Makes you wonder if we are going down hill !! ??
No one would think your fixes are fake, you've definitely been to war with certain items on your channel lol you deserve easy fixes from time to time.
well put, and i am happy vince has improved so much over time and has been learning new things
It feels sooo good to have your support, Vince 🥳🥳
Likewise!!! Thank you so much 👍👍👍
We’re also super happy that you support our favorite TH-camr, thank you for that @PCBWay! Fun fact: I never watch sponsor segments, but I always watch them in Vince’s channel, since he goes the extra mile to make them tailored to each video.
@@MrKeebs Thanks Felipe👌👍👍
I didn't expect pcbway to actually have a TH-cam channel
We also love that you support one of my favorite repair people and also deliver good pcbs for low
This man is so fun to watch, sometimes I just keep the video playing in the background and listen.
What I love about Vince's videos is he gets as excited as I do when I fix something that joy of making something broken work again is one of my favourite things and impossible to fake.
My sister had a roomba that was broken out of the box. From watching your videos, I knew that there was a chance something came unplugged during transit. And sure enough, that was the issue. Love your videos Vince!
An optocoupler can be seen next to the DC jack which means that that transformer is part of a switch mode power supply and not a linear one. The shottky diode does the high frequency rectification and also protects the circuit from DC going back to the transformer.
Yes, the schottky diode is for rectification, and after it failed, the dc voltage shorted across the coil. The coil is just a piece of wire for dc voltage, so it's like you basically connect the contacts together.
With a little post processng that we can do nowadays you could make some very impressive photos once they are in the computer.
On the charger the diode that you took off does the rectification. One diode is a half wave rectifier. Therefore when plugged into the mains it was dumping 12V AC where it should be 12V DC, When you plugged in the DC it was going through the faulty diode and transformer to ground instead of being blocked by the diode.
Perfect, thank you PDS, I knew the viewers would have the answers. I haven't heard from you in what seems like an eternity. You keeping well? Are you still volunteering at the laptop for the community place?
@@Mymatevince Hi Vince I'm doing good. I stopped volunteering at that place about a year ago. I just wasn't enjoying it anymore. I've been going the gym and I still do 3D art in blender. So I been keeping myself busy.
makes perfect sense. it doesnt need any more than that. But i wonder what the noise was when he plugged it into mains?
Yes. Also the small transformer is probably for a switch mode circuit, a linear transformer would be much bigger. It looks like there's some sort of combined pwm ic and FET package on the other side of the transformer.
Just to clarify what the shorted diode is for. It is the output rectifier for the switch mode power supply transformer. If you plug the mains lead in the switch mode power supply won't work because that diode is needed to convert the AC output of the switch mode power supply into DC.
Sorry to hear that your going through some stuff, hope it resolves quickly. Wish you all the best. Great video!
👍👍👍
Thanks as always for a great video, Vince. I have to say, I'm sorry to hear of your current predicament and I'm sure I'm not alone in wishing for a speedy and agreeable resolve for you.
As a dad who has the occasional happy ponder over old photos of his kids, I was quite literally smiling along with you as you brought your old photos to life on the now repaired gadget. Really great stuff. Thanks again for a great vid!
I love that negative camera. I didn't know something like that existed.
Vince, I loved seeing you reminiscing on those memories of you and your kiddos❤ keep being awesome 👍
10 years of working with helicopters and really large FLIRs, and this is the first time I've ever seen one that small. Or not pronounced "fleer!" This video was so fun! The Kodak thing really made me smile, honestly. That's a really neat gizmo.
31:11 A transformer is a coil that loops to ground. The diode is there exactly to prevent the 12v in from going true the transformer back to ground when the mains is not being used.
That explains why the 12v in was not working but doesn't explain why the AC wasn't.
As you said 39:36 if the diode is shorted and acting as a wire the AC side should just work normally. Since it isn't, it means there is most likely something bad going on on the AC side. And 40:13 I don't think just replacing the diode will be enough to fix it.
My husband and I send our best wishes as you deal with your issue and have to say thank you for sharing your Journey of fixes with us all In your own way you have given me a break from the sorrow of the loss of my Mom so I hope the Joy and peace you provide us, with all your fixes comes back to you and your family a thousandfold
So amazing to see our kids from way back. You led me to look for my own pictures from 20 years ago. Thank You.
Vince, you can make a bypass light bulb to limit the mains current in case something is shorted. It's just placing a light bulb in series with one of the mains wires. If the thing you are testing is shorted it will just light up and avoid damaging it more (and prevent a fire too)
but its has to be an incandescent type bulb (old type not LED or CFL).
can be an halogen lamp too, incandescent bulbs are hard to find these days, specially 60W and 100W, which are the ideal ones for that
The faulty diode on the Nitecore battery charger was shorting the DC supply and also the AC coming from the transformer. The diode was sinking all the current provided by the transformer and pulling the voltage output of the transformer down, which is why it heated up. As for the humming, without the diode the switch mode power supply has no load, in an effort to keep the output voltage at 12v the switching frequency gets dropped all the way down which probably caused some coil-whine in the audible range.
More more more ;) That diode is a TVS Diode - Transient Voltage Suppression. Probably for reverse current protection. The AC side probably generates the voltage the DC jack provides - so both will be shorted by that same diode?!? Best PCB Way adverts btw - I watched all of it!!!
@35:00 you're confused about the AC voltage. The diode you removed, makes it DC. By just being one diode and not a makes the DC output very choppy, which then is probably smoothed out by a condenser.
Great videos Vince, keep them coming. My wife and I have just finished a marathon two weeks watching all four series of Manifest.
Always a pleasure to get a "chill easy fix" video after some hard battles you earned it!
Also I never saw that Kodak machine, it might come in handy for a friend who has a ton of those negatives from the past (with french president Jacque Chirac and the Mauritanian president at the time no less!) but he has no money to develop them for an expo thanks Vince!
I love Manifest too!! Great series. So heartwarming that you ‘left’ for a short bit to watch it with your wife 😇
Really sorry to hear about your predicament & the effect it's having on you! Gotta say i think your the most positive person I've ever watched on TH-cam! I know in time it WILL all be resolved & as the saying goes "you can't keep a good man down" Hope you do get it all sorted sooner rather than later 👍🏻
Thanks Rebug, I really appreciate that. Luckily mentally I'm already getting over it. Thanks for the kind words😎
@@Mymatevince Glad to hear that & your very welcome! 👍🏻 You've given me & millions of others loads of great content so my kind words are the very least i can do 🙂
Hi Vince, nice and straight forward fixes! Thanks for the entertainment!
I am sorry to hear for what you are going through. I hope you manage to sort it out. Good luck!
Nice one, thank you Marcel 😎
Another great Fix video, Vince! I hope your issue gets resolved quickly! Just so you know, we'll be here supporting you!
i hope you can get your legal issues sorted man . i have learnt a lot from you and always love your fix it vids .
Your video's are really addicted to watch. Keep up the good work. You make me smile and enthusiastic to do some repairs.
Sad to hear you're going throught a rough time mate, hope ye get things sorted alright!
Just make sure when dusting the scanner interior that you check for dust on the now-working backlight. Judging on the fact they're in the same spot AND in focus, that's where i suspect those bits of dust are.
I’ve scanned several thousand negatives and slides over the years and the worst issue is usually dust on the back light, once you know the film is clean. I just blow with a lens blower and that usually sorts it.
Hi My Mate Vince, The reason you would get no output on the battery charger secondary side is the that feedback see no voltage and shunts down the primary side of the power supply, I Would not plug in a power supply without that rectifying diode can cause the primary side to blow up with no feedback, That diode is under extreme stress and is a common failure point, I would go with a higher Amp rating to get it to last longer, great video 👍👍👍👍👍👍👍👍
Thanks AR, you're always the man with the answers 👍👍👍👍👍👍👍
35:40 in this shot, it looks like the negative rod on the left is touching the positive connection, hard to see from a one dimension perspective but if they were touching each other perhaps the noise was contributed by this? Also, why you don't have enough faith in your work by now? You're always expecting a 'bang' to go off. I can tell you that I have faith in your work, don't be so hard on yourself. Besides we all love a bang now and then it adds the dramatic effect! Keep on doing what you're doing, Vince and I hope things get sorted in your favour.
Remember, it's not worth worrying about something if it is not in your control.
Your videos are so fun. Thanks for uploading and showing how you troubleshoot
The battery charger uses an isolated switching power supply topology called a flyback converter. The transformer is actually a coupled choke (because it stores energy) with one primary and several secondary windings. There will be a FET switching rectified mains across the primary at high frequency. The secondary circuits just have a single diode and capacitor each. The circuit is arranged so when the primary FET is on, all the secondary side diodes are reverse biassed, and current ramps up in the primary. Then when the FET turns off, the ampere-turns are delivered into the secondaries. If one dc output capacitor has lower volts per turn than the others then it gets all the primary energy for that cycle. If one of the secondary rectifiers blows short circuit then the primary winding sees a big reflected capacitance which will cause it to current limit as soon as the FET turns on, so the other outputs will get very little charge supplied to them. All the best.
Thank you Lumbo for all the info 👍👍👍👍
Sorry to hear about what you're going through stay strong i'm sure you'll get things sorted out soon.
I'm really glad I live somewhere where I don't have be paranoid of mains power. I've changed outlets without turning off the power. I used to work with an electrician that would check the power by wetting his fingers and touching the wires.
Love this channel. What camera are you using? The clarity when you zoom in is amazing. Thank you
Im fairly new to the channel and was thinking.. my goodness how jammy! Great stuff and I hope your troubles are soon resolved 🤞🏻
Great fixes Vince, hope the situation gets resolved quickly.
Really entertaining, I'm a big fan of the channel.
Regarding the short shotky diod, my simple reasoning is that it's dividing the ac transformer secondary side from the dc part of the circuit. Once the diod semiconductor matures to a full conductor, it passes the dc 12v (from the bench supply) to the transformer, which when fed dc, acts just like a wire short to the ground through the other end of the secondary transformer coil.
I have had problems with my Power-A Xbox wired controllers. My sons started first with the buttons under the analog sticks stopped registering button presses. then the triggers LB and RB(top shoulders) stopped. Ended up the micro switches were bad. Luckily i had a few junk VCRs that had a bunch of switches in them. After i fixed his controller within a week my controller started acting up! Buttons not working at all.
Love the videos!
Fantastic video Vince, loved every minute of it. Stay strong mate, in my eyes your a legend.
I'm not an electronics engineer, but my father was. A Diode of that type (your battery charger fix) is meant to allow electrical flow to go one way only. If a diode shorts out, it allows electricity to flow back into the circuit, causing the fault. Neither the AC or DC side will work because of the placement of this diode, taking it out did allow the 12V side to work, so once you replace it with a good diode, you should be golden. Also pay close attention to the direction of the diode's placement, that dictates the current flow.
The film digitizer device thing is really really cool.
I hope you get your conflict resolved. Conflicts like this don't only affect money but also ones mental wellbeing. Stay strong, I am sure it will get resolved.
Great video Vince, when you revisit it, check the diode at D4 as that left leg looks dodgy where it's soldered to the board, I'm a vaper and use one of these chargers for 18650's and 21700's and I can tell you this is a fault I've seen myself and has resulted in 2 burnt out boards on both the ones I had, one literally went into a melted mess it got that hot, I've since changed manufacturer.
These silly fixes are the easiest and very rewarding. It reminds me of when I bought a Davis Vantage Vue for parts/not working. And the problem was that the transmitter with all the sensors were transmitting on a different channel than the console was receiving. I think :D
The photo scanner is the same issue I had with a video projector my sister bought. No light. They didn’t have any more stock and gave her a refund. They didn’t want it back so she popped into my house and I took it to bits to what was wrong. The projection led wasn’t plugged in, the plug was sitting on top of the pins. I pushed it on properly and it lit up and threw a nice big picture on the wall
Another great video, Vince 😀
I'd happily buy the Kodak Scanza from you as I've just been given 1000+ 35mm slides to digitise by my Dad!!! Slides from 70's and 80's
Great Video Vince. Nice easy fix on the first couple of items. The battery charger I was cringing when you were going to plug it in, as I thought it wouldn't like it. The diode you removed IS the rectifier that converts the HF AC into DC. The power supply would have had no feedback to regulate itself and it would have started upping the frequency to compensate. The reason the DC side would not work is because the diode was shorted it was feeding back into the transformer. Hope that makes sense, and hope you get your legal troubles sorted out. Best wishes Mick.
Indeed, the two diodes that connect to the AC leads act to as a rectifier by blocking the AC in one direction, resulting in presumably something approaching 12VDC on the other side, joining where the 12VDC input jack is inserted. This also separates the 12VDC and AC side from each other, as the diodes block current going from the DC side to the AC side. When they're not shorted, obviously.
It does make sense Mick. Thank you. Just in case you might know...What would be the outcome of upping the frequency, a high pitched noise i presume, but would the voltage shoot up from approx. 12AC? Or would it just risk damaging the transformer or switching I/C. I haven't caught up with your channel since I've been on my hols. I'll try and get a couple in later after 'walk the line' Johnny Cash film 😂😎
@@MayaPosch Thank you Maya👌
@@Mymatevince I'm not 100% on the potential damage, but I'm sure it wouldn't do it much good 😂😂😂Yes I was wondering if everything was ok your end as you haven't commented on any of my videos for while and was going to drop you an email to see if everything was ok. My channel seems to be gaining a bit momentum at the moment, look forward to seeing your comments when you get time. Thanks Vince 👍👍👍
@@BuyitFixit Thanks Mick, yeah holiday followed by this neighbour drama has left zero time. I'll be back on it again though, no doubt about that!
Good job .hope the car coming along well .
Hi Vince, love watching your uploads. I have a DVD TV and the DVD doesn’t work have you done any repairs on a TV DVD by any chance please. Keep your uploads going. 👏👍🏴👏👍🏴
31:20 the short is going thru transformer to ground.Damaged diode with output capacitor are rectifing ac.
Any 3A schotky diode should be good.The diode was damaged because overheating,should be bigger diode.
If you are feeding AC into the circuit, every half cycle you are reverse biasing the circuit via the shorted diode.
The diode is required to only allow the positive pulses through into the circuit and the capacitors will remove the ripple from the pulsed positive DC.
The shorted diode also allows the positive side of the DC to back-feed into the AC supply circuit possibly getting shorted by the transformer secondary to the negative supply side.
Excellent info, thanks KB1👍👍👍
@@Mymatevince You are welcome Vince.
Isnt that diode acting like a one way valve and keeping the alternating current from alternating? or is it checking for AC or DC?
Don’t remove a diode from the secondary side of a smps!
The problems isn’t that it is no load, but there is no feedback to the opto-coupler.
If you’re unlucky the primary side blows!
Because the opto-coupler is used for the feedback/regulation of the secondary voltage, by removing the diode, the opto-coupler has no reference voltage so it ‘thinks’ there isn’t any voltage and it lets the primary side oscillate a it’s maximum witch often results in a short circuited power mosfet, or if you’re really unlucky: everything blows in the primary.
the diode you removed is a high frequency rectfier, this power supply is a HF one, like a PC one. so the fast diode you have removed is the rectifier you were looking for. you could have removed one from an old PC ps and soldered in place, even if its not a SMD.
cheers vince mate keep them commin love um, good luck with the subsidence issue pal.!
Great episode Vince 😁
Another great video Vince I'm learning something every time cheers from vegas
It measures shorted because you're putting DC across the transformer secondary winding, which looks like a short circuit....it's a coiled wire, but still just a wire to DC.
I've got money this battery charger was wired up for 120v AC for north America and doesn't have a rectifier for 240 built in. 120v American will have 1 line neutral and having another leg of power fed into probably shorts out that diode! Let me know your thoughts
What part if Australia did you visit ? We love watching you fix things and especially working on the car👌🏻👍🏻
Sorry to hear about the subsidence claim. Your videos always make the Earth move for us.
Hi, I really enjoy watching these. What camera/lens do you use, to get such clear close-ups?
Thanks for another great video. Best wishes that your predicament gets resolved in your favor. Best wishes form the USA
another great video really love these helped me to start fixing things rather than throwing and buying another 👍👍👍
Don’t know if anyone has mentioned it but when you connected the power lead to your extension and turned it on one of the silver rods was touching the middle pin creating a circuit
I love this Box! So much honest and yet interesting faults!
I’ve been eyeing doing my own trying to fix videos so I saved up money and bought a couple of job lots of phones
Another great video! Liked & subscribed. Could you recommend a beginner multimeter, as I’d like to have a go at fixing an old radio I have. Thanks. Mike, Wimbledon 🇬🇧
Hi Vince, if the TX has a centre tap then the diode might be part of a 2-diode BRIDGE rectifier?
Since the diode was shorted, the DC voltage input was flowing through the diode into the secondary winding of the transformer (shorting the +ve with the GND)
I'm using a PowerA controller to spare some ware on my Elite. It's a nice controller it's not a Elite but it works fine for every day use.
Symmetrical on *BOTH* sides! How advanced!
Very nice fixes :) Surprisingly expensive that film negative scanner, bought one in 2015 for about 30 Euros, altough mine doesn't have the screen or memorycard slot, it works only with computer via usb cable.
It was fun going through old negatives and scan them. Found some pics, that were never made as a paper photos, because they were incomplete or had failed otherwise one way or another. Still, they had interesting enough material, that I scanned them, for example from summer holiday trip in summer of 1985. My parents enjoyed seeing those pics as well after all these years :)
Dust tends to be a problem though, had to clean the negatives, and the scanner multiple times during the scanning. Luckily the scanner came with cleaning kit, so it was easy to do.
Thanks. Yeah the dust really shows up on them. I gave it a blast with the datavac, but I haven't tried any since. Interesting to heat about the cheaper version. Thanks for sharing👍
I have a battery charger for a drill and after some testing, I realised that the external power pack for it was faulty. It passed 24v AC into the charger. It seems hard to find the right power supply for it but I can get around it by supplying DC into the correct point on the board.
I love watching your videos Vince! And I'm so happy to see the Rolls coming together! During COVID lockdowns I found your channel through Elliott along with Steve over at Tronicsfix. I'm an IT professional and was already a computer expert but I wouldn't have had the confidence to start fixing other stuff if it wasn't for y'all. I run a tiny local repair business out of my house and I've just recently started filming stuff to put on the channel I made for it (Don't Panic Tech Solutions). Thanks for your inspiration!
That was a really entertaining and enjoyable video! I love seeing electronic items fixed, and I also like fixing things myself (so long as I have the tools and knowledge to do so). Sorry to hear about the situation you were in.
If given the opportunity, I would happily buy one (or both) of the Xbox controllers and the Nitecore charger. I wouldn't even use the mains input as I have plenty of 12V DC chargers lying around (from when I've stripped apart TiVo boxes).
i suspect that diode is the rectification diode for the transformer output and with it shorted the transformer winding is directly connected across the power rail
12:49 I've always admired your ability to turn a negative into a positive! 😄
It's a half wave rectified supply, hence no bridge. A scope would show a series of positive humps perhaps stretched out by capacitance. Just a diode. Standard for battery charging.The dc is traveling back through the secondary of the transformer to ground because the blown diode is allowing it. dc frequency = 0 so 2 pi fL= 0 dc sees transformer coil as a short!
Gday Vince, hope the issues all get sorted out. 🙏
Great video Vince!
When u have ac voltage coming from a transformer u can make a bridge rectifier with 1,2 or 4 diode with one diode depending upon the position it can turn to negative or positive
0:57 that breakaway cable is the same used on the wired xbox 360 controller (and counterfeit controllers does not have a breakaway cable most times, which makes easier to spot a genuine xbox 360 controller).And that breakaway connector can be purchased separately if you lost the one that came with the controller.
The volume control is something that I really miss on the Xbox one /series controller.
Unfortunately, Both Microsoft and Sony does not allow third parties to make wireless controllers for their consoles, this is why you can't get Microsoft / Sony 3rd party endorsed wireless joypads from brands like 8bitdo and the ones shown in thr video.
Top tip if u have larger batteries that dont fit charge say c or d cells use a safety pin on the end to raise the terminal.
I am not surprised by the easy fixes, I used to buy pallets of returns and the vast majority were either not faulty or a simple fix. It wouldn’t have been economically viable if the majority had actual faults due to component failure.
You and joeydoestech are my favorite tech fix channels.
this diode is for rectifier to DC voltage , when the diode is short all 12 v DC is short because it connected directly to secondary on transformer , one pin GND the other pin B+ they connected together by the diode
Hi Vince.Who is the Artist you used in your interlude on the dashcam repair video.Cheers John..
Believe that diode is for reverse polarity protection so it should work fine as long as you don't use charger with positive on outside
Well man you got sub i am pro repair and even for forcing manafacturers to provide repair manuals,parts and have repair score on ther packaging.
Good, albeit straightforward fixes. Diode oring (without anything else) is not the best design for a DC / Ac capable device. If one of the diodes (one leg of the bridge) goes short on the AC side then, when DC is connected, a high current can pass into the transformer.
Love the channel! Cheers, hope the troubles clear up.
I could hear the worry in your voice vince. Don't stress about your current situation. The truth always comes out . Just do as much research as you can . Cover all the bases . Stay strong 💪
Great comment.
I haven’t seen a breakaway on a controller wire since the original Xbox, I always found that really ingenious and Very interesting.
Just watched one if your vids from 4 yyrs back , 1st time seen ,I believe, Tomy chatbot..
Wow, left comments there.. do you recall and possibly do or done a video ,on Tomy Hoom dorm ??
Cool toy for its time too !!
And they're only just now creating a vehicle ,that works on same principle
.. bar the large air pump !!
The air pod !!
I've just Googled it and I've never seen one before...I'm going to look out for a faulty one 😂
If you see one on my channel in the future then you know it was because of you!!! 👍👍👍👍
@@Mymatevince no worries friend, I thought this may intrigue yourself!!
And glad to be of help !! Keep up the tinkering .... I got named Mr take to bits by one of my primary school teacher....
Don't see why , it was only a biro pen ............ erm oops
@@Mymatevince erm ,I get carried away by my thoughts at times , yet the pinball machine , you repaired ..
With the single mechanisms, that made the bumpers and clutch systems work ....
If you pictured it right... I guess it stemmed from hiw the cotton Mills works , or other such mechanical areas..
With the combination if electric , then computing, like a mish mash of sorts ...
So always intruding to see what's inside.
Unlike amstrad hi fis ........
Less said....
Look at the high quality hifis of the 80s ,even ow end.....sound quality etc
To what we have today ,.....
Makes you wonder if we are going down hill !! ??
@@Mymatevince I'll try to leave it there ,as I may drive you crackers lol , I'm 56 and I talk to myself lol
@@wayne7521 😂👍
I do similar work on cars ,plumbing, heating, electrics, hydraulics, guns, ect. Master of none
Good stuff Vince, keep'em coming!