Repair (and shock!) from the Sargent EC225 Caravan Power System
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- Опубліковано 5 лют 2025
- Mark repairs a caravan power control system with a dead charger / 13.8V power supply. He also gets a 320V electric shock from it! (Left in the edit for your viewing pleasure...)
I don't think I've heard this guy ask for one like or subscribe. Top guy.
For that "sideways" you earned a sub. Friendly reminder not to get too comfy around power supplies no matter how skillful you are. Great instructional video.
😁 It's always good practice to discharge the caps after getting zapped... 😆
🤣😂🤣
Yeah we've all been kicked by a cap. 'F me sideways' made me lol. Great work mate.
Sorry, I can't like your comment... it's at 69.
I've used the "sideways" add on many times, but when it gets really serious I add, "with a salad fork".
At that moment I was sleepy and my eyes were half close, the sound of the zap did wake me up as well.😂
‘Currently’ 😅 I’m binge watching your channel. Now I know where the jumpscare part of your intro came from!
He'd referred to it in one of his videos too ... about how he's learned his lesson :P
Same here. Did he say "Fck me sideways "? He seems to mild mannered for an F-Bomb lol.
Me too😅
me too!
I'm still looking for the video the the BigTrak in it....
"Too many oscilloscopes? What a silly idea that would be!" ... LOL, a man after my own heart. Been working on and designing electronics gear since the 1980's, your channel is like comfort food for the engineer's soul.
Mark, I watched you shock your self 4 times, you're great!
U DA MAN MARK..LOVE YOU!
I knew that shock was coming, having seen it in your intro sequence so many times and always making me smile, but it made me jump, too. Keep up the informative and entertaining videos, Mark!
And me too !
Me too!
Yeah ! I was waiting for it and still jumped out my seat !
Many ppl I think! I also laugh my ass off.
Ahh the old capacitor finger discharge 💥ouch!
Great video 👍
Just goes to show that you don't really NEED a discharge tool; you've got on easily at hand at all times.
Such memories. About 15 years ago, hmm, maybe 20, I was having my computer worked on. Came into the guy's shop to pick up my machine and noticed a computer on the bench with the power supply out. mentioned it to the guy and he said it was a common thing, and it was always just easier to put a new one in than fix the old one. I asked what he did with the old ones. He said "I don't know why, but I just toss them into a big box at the back." I asked to see it and there were about 50 supplies in there. I said I might be able to fix some of them and we made a deal for me to buy the whole box and he'd buy back the ones I could fix. Lots of shorted diodes and popped caps. Ended up fixing about half of them. I made a decent profit plus I scavenged a lot of good parts. Best were the IEC power plugs with noise filters. It was an ongoing thing; when he had about a dozen old ones he'd give me a call and I'd pick them up. Went on till he had to move away.
still happens a lot. usually on older pc's though.
I love your work !greatings from Chilito Lindo!
Thanks for the easy tip on testing a mosfet. 👍
Mark, you always have a smile on your face, but even when you get zapped! Thanks for sharing. ⚡⚡
Much as I love to see old stuff repaired, this could not have been a good financial option. A replacement psu/charger for that unit isn't much over £100, I bought one recently to replace a 24 year old one which went bang and threw bits of transistor out of the vents! lol. Eeek! Glad I discovered your channel. Fascinating to see how you can fix all this stuff.
The value of the repair is where and how to get your hands rather than the cost of replaced components.
This is often forgotten.
That power supply probably costs less than the repair but the owner chose expert hands to avoid major damage once installed in the camper.
From this perspective the repair makes sense.
@@diegoattenestudio Um, what? Nothing here makes sense. "where and how to get your hands?" I have no idea what you are talking about. You literally make zero sense. Putting in a new one can't damage anything. What on earth are you trying to say?
@@BassistInATutu You can get a 200W Meanwell power supply, genuine brand new from Digi-Key for about £25 (LRS200N2-12). Yeah, doesn't really make much sense. Still, an interesting repair!
This man is an electronics god. How does he know so much? I mean.... how?
For sure. How many educational degrees he must hold. Just to know and operate a whole wall of test equipment alone. Holy Moly. I wish I had just 1% of his electronics knowledge.
Hi Mark, sorry, but I had a good giggle and had to replay the 'shocking' part. Fuckin' pissed myself. 30+ years of repair experience here and I can confidently say we have ALL done it at one time or another. Reminds me of quite a few years ago one day working on a CRT television, I carefully reached in across the PCB to make a trimpot adjustment resting my hand against a tin EARTH shield (to steady my hand/arm) as I did the adjustment, turned my head to look at the oscilloscope while adjusting and just barely brushed my finger against a LIVE heatsink and pretty much said the same thing as you. LOL! Certainly wakes ya up 'ey mate. Silicon handles electron flow so much better than us humans. Lol!
As a morning wake up I prefer a cup of coffee instead of a charged capacitor.🤣
so discriminatory :)
So Mark gets 300 early zee morgan. Reminds me of going to work one day. I had a piece of 440v machine and needed to tag it out in the control room. The walkway lanes were maybe 4.5 feet wide between control panels. As I started I set my coffee cup on the relay I wished to tag out. As I set the cup down the cup had spilled over making the paper wet and zap. I just caught myself before landing back against the control panel behind me. A valuable lesson to never do that again.
LOL .That shock,and your reaction to it made me chortle.Hope you're OK Mark.I enjoy your videos.You seem to know what youre doing.Keep them coming.
Great videos. I can't wait for more. Your setup and editing is great.
But, his sound is crap!
@@marcse7en The sound seems just fine to me.
I'm a software engineer during the week, and over weekends, I play with my electronics. building amps, redesigning old amps, a bit of iot etc...
During the week, I love putting Mark's videos on my second screen. So calming. helps me dealing with corporate BS.
I have received multiple discharges of 220v/380v/440v, and you get used to it, you also get used to burning your fingers with soldering irons LOL, His reaction tells me that he had not been shocked by a LONG time.
That shock made me cry laughing, sorry mate, but I am glad you left that in, it's a great reminder about switch modes and just how nasty they can be. Top Man.
Mark brought out the "F" bomb on that one! Made me jump too.
saying "F bomb" seems childish to me.
Still smiles even after getting an electric shock! Haha, good man! Enjoying your videos, love the vintage AV stuff!
When I was an apprentice (many, many years ago) one of the engineers spotted me discharging a capacitor with my screwdriver.
After giving me a bollocking, he picked up a resistor and said; 'This is how it should be done'. He then proceeded to bend the legs of the resistor, and holding it between thumb and forefinger - BY THE LEADS - he touched it to the capacitor terminals!
After watching him jump violently, I said; 'I think that I prefer my method...'
The capacitor will make everyone wish they were non conductive. Another great video. Thanks
Thanks for the MOSFET test. That's a cool way to do it.
I was so engrossed in the video that when that cap shocked him, I felt as if I was being shocked myself.
man, I was there, actually exactly there - repairing the PS. That is really something that makes you awake - actually even shaking a bit ;-)
I always grab the dead power supplies from places I work. They are quick to fix and come in handy for many projects, especially for a few bucks in parts.
On another video, another viewer mentioned that you're the Bob Ross of electronic repair. I have to agree.
Watching your videos, takes me back to my high school days in NYC, Chelsea HS, w/ Mr. Harold Metz, shop teacher.
I then went onto the Navy's Advanced Electronics Program.
I enjoy watching your content.
Love your videos and I do electronics too and it’s good to see how other people work. Had to laugh and we all done it and got a shock of a capacitor lol don’t we just love capacitors. TVs was the worst you really had to watch yourself with. Anyway love your channel and love your lay back ways, you’re just so down to earth and I like that. I meet so many people in this field who think they above people. I been doing electronics for over 35 years but cut back a lot now and don’t do so much only repair my sons phone he keeps breaking lol. Anyway all the best Mark you’re a great guy.
So glad I was recommended this channel by the all powerful UA-cam Algorithm(TM). Your videos are fantastic - very detailed and complex repairs with amazing attention to detail and workmanship, as well as a great presenter to boot - I'm hooked!
Spicy caps are no joke. Took apart a Sony VAIO laptop power supply thinking I could fix it (no idea why I did this, I clearly could not) and received enough of a belt from a large cap to burn a nice little hole in my thumb that hurt for weeks afterwards.
Charged caps - not even once.
The King has chosen to bestow the award of the Purple Pucker for your shock sustained on this day in the service of Electronic Restoration
"F**k me sideways" shows even experts can get it wrong, absolutely brilliant channel.
I was calling out to you "Mind that cap", too late! Great video.
You should consider renaming your channel to "Sideways." Just like the movie, which I also happen to like. By the way, your smiles and giggles are so contagious. Love it!
I'm sitting here watching you apply that thermal grease thinking "I hope he's discharged the new capacitor" ..... and the rest as they say is history
Thanks Mark, saved me pulling apart my Sargent EC155 to find out what the charging arrangement is, convinced it will be very similar. Keep up the good work, really look forward to the videos and the fault finding processes.
If you can't wait... 17:50 !
as soon as you said blown cap , i knew the diode was toast too. ran across that combo A LOT in crt monitors.
Looking at it, it definitely had PFC - thats what Q1, those diodes and the first yellow transformer (actually a choke) was. Active PFC seems to be a real weak point in modern SMPS's - especially if the main storage capacitor is bad quality... the PFC will attempt to ramp up the voltage until it eventually turns the transistor on full - shorting the supply when it does! Seen this on loads of LCD TV and monitor power supplies.
Found your channel via Louis Rossmann. I must say that I absolutely enjoy your content (new and old) and the way you handle repairs. Cheers Mark!
11:53
I felt that. My best one was placing a 55v swing voltage psu on my leg after testing. So that was -55, 0 55v DC. I spoke in some ancient language that day. Language may have originated at the core from Hades himself...
That supply looks like it actually does have PFC. The choke and diode(s) after the bridge rectifier are a giveaway..that's probably what the "other type" of FET was doing.
Bloody hell, that shock even woke me up.
You getting shocked reminded me of my Air Force days! lol. Been there done that!
I shouldn't be laughing but I've been there, done that, and said exactly that 😁 No matter how many times one learns that lesson, one still forgets once in a while.
Great videos you have inspired me to set a workshop and start doing electronics again
Takes me back to when I was a bench engineer in the 70’s at Philips. The components have changed but the procedure is the same. I learned a lot in the time I spent in there. I Then went onto field service which was a whole new ballgame. By the way, I’ve lost count of how many shocks I’ve had over the years, some of them not very nice !
The "golden rule" of working on any type of electronics (or electrical equipment): It is live unless you prove it otherwise.
17:54 made a giggle - takes a pro to admit lapses...cheers from New Jersey!
Forgot to discharge the capacitor? I think most of the charge went up his arm. I don't know electronics but watching this guy is brilliant.
That shock though Mark. Great video mate
Best channel ever. Looking forward to when i can pay for the course
The "human load test" is @17:50 for those who are waiting
Ow! I felt that. Those HV caps can hold charge for days. I've had a16uF / 500V electrolytic sitting on a shelf for 2 weeks here. Put it there fully charged and measured 235V next day. Down to 187V 2 days later. Just measured it again now, (2 weeks later!). 7V still lurking in there. Soakage may be a factor as it's a tad old. V test every time. Thanks for the excellent content. I like the DC current limit test. Series light bulb and variac still here. Most appreciated. Cheers. Liked and subbed.
It reminds me of the olden days when I used to service valve (tube) TVs fitted with cathode ray tubes. The final anode (plate) of a colour CRT required about 30 kV to operate and I had an enormously long probe to check this voltage. The final anode also acted as one plate of a capacitor, still retaining its charge when the TV was switched off . So the first thing to do before anything else was to discharge this anode using an earthed conductor such as a thin screwdriver. Invariably there would be a sparking noise showing it was now safe.
But it was so easy to forget to do this especially after having turned the TV on and off several times. Fortunately, although the anode voltage was high, the current behind it was fairly low so you only felt a medium jolt, but you also felt stupid!
In more modern power supplies it's good practice to have in position a high value parallel bleed resistor, say 1 megohm, to discharge any high capacitance electrolytics when the device is switched off.
As you were putting the sleeves back on the FETs I suddenly realised what was going to happen - no, no, no No No NOO NOOO *bang* expletive... Glad you were OK though. You are braver than me - I've never liked working on HV circuits.
I've been binge watching your videos for a while now, Mark, & I always had it in the back of my mind that eventually I'd find "the one with the shock" as a certain US sitcom would say. Lo and behold, today is "that" day! In all the many, many vids I've seen, this is the only one I have heard you swear! (Lol) I've seen you drop things, forget stuff that meant you had to repen a case with 1000's of screws and generally do stuff that, if I'd done it would've had the air blue! For you it took a big jolt of electricity to let out a standard reaction 🙂! Unless you are really good at editing, your powers of restraint border on the superhuman!!😂😂.
Anyway, as I'm sure you can tell, I really like your videos. Sadly, I can't afford to join the "Mend It Like Mark" gang, so I hope you don't transfer all the good stuff behind the paywall, and you will continue to provide the same quality of video on UA-cam. Cheers!
getting through all ya clips. your face when getting that cap belt was a pictue. happened to me a few times lmao ace
This channel should have million's of subscribers! Suppose it's a reflection of society today...
Mark I have to tell you one time I was trying to test an Old Ham amplifier that was modified to be used on CB radio and it had a 3-500Z tube which would put out about 800 watts. It had about 2,000 AC plate volts, but I am just an amateur so don't quote me on this. Anyway it had an RCA jack in the back for the foot switch, but I was just using a short piece with RCA jack on one end and other end stripped bare. I guess I was sweating a bit and somehow my forearm touched the case and it jumped into me. The next thing I knew I was standing about a foot or two back from the unit with my fist clenched and smoke coming off my arm. Talk about a wake up call I mean I was in shock 🤣🤣🤣🤣🤣
At last I found the video from your shocking intro clip. I always wondered what the circumstances were and what expletive you said. Now we know! Looks like lots of viewers have found it too as there's a definite peak on the time line. It made me jump just watching. Hope you've recovered without any PTSD. A good demonstration as to what can happen without discharging high voltage capacitors. ⚡
Really enjoy watching these videos. Not sure why, haven't done anything in electronics since building rudimentary Heathkits in the 1960's. Sure looks fun and your troubleshooting skills are impressive, and a ton of nice equipment too.
Reminded me of an incident many years ago with a PSU out of a big CRT TV which I had been working on. You were lucky it was on the bench when you did it. Unfortunately I was picking mine up off the bench and my muscle reaction meant it went flying across the very large workshop ending up on the floor with a few cracks in the PCB. So easily done now matter how many years you've been doing this stuff.
I feel your pain, I got a huge bolt off of a Peugeot HT Lead while trying to diagnose a missfire under load, turns out the insulation in the lead had broken down and my hand became the test probe when I touched it 🤪
Mark, could you repeat that expletive please, it sounded rather educational! Great fun videos as always.
Sometimes you have to suffer for your art! But please do be a notore careful. You really should have a second person there, just incase something goes wrong. Love your videos. Would like them to still keep coming. One of your many/and I mean many fans of your channel. Keep up your fabulous work and stay safe bro!
I’ve been busy watching all your videos… The channel is great I’ve been wondering when I would get to the video from your intro and here it is… Firstly I’m glad you wasn’t hurt but I did laugh a little (lot) from your comment 😂
I used to take apart battery powered camera xenon strobes circuits and play with them, besides the 333 volts DC there's the oscillator that varied in frequency (as the main capacitor was charging up) from 1KHZ to 18KHZ, I got shocked many times by these battery powered high voltage circuits, but the high-frequency put the hurt in hertz
As always, great fix Mark, and a bit of a jump as well. I am just surprised, these switchmode PSU's are dirt cheap and I have had a few, some lasted longer than others, but looking at the construction of what is supposed to be a "better brand" like meanwell which is way more pricey than these no name jobs, it is just as cheaply made as the nameless ones I have had. Need better heatsinking and then they will last a bit longer under heavy load conditions.
5:00 So true. I've got 10 (one being a really nifty little pocket IP67, great for callouts), 5 Squigglyscopes, two being CRT and one little pocket job. Good to see you still using CRT. My first was a valve jobby; now I'm showing my age.
I once had a friend ask me to work on a Kodak Instamatic camera. This was a tiny device and upon opening it up I noticed a sticker that said high voltage. At this time I had no experience in electronics and thought it funny until I got my pants knocked off by the flash charge capacitor! I threw out a few explicitives myself!🎉
Love your channel! Nice to see im not the only one getting zapped from time to time :D, we never learn really :D
I once repaired my old colour TV (open circuit resistor on the back of the tube) and had to very, very carefully adjust the focus with an insulated screwdriver.
I was waiting for the shock and it was worth it. Really enjoy the videos. Thanks!
can't believe you where still smiling after that shock, Having been there, I can tell you I wasn't. A Sub from me.
Love watching your videos, Mark as electronics have always beffled me. Even through I new you were getting a shock, it still made me jump as well!!
The discharging part in your finger was awesome dude and as usual your smile is the best thing in your videos !!
Hi Mark, ive got to say mate, i love your vids and your personality tbh. I just wish i lived closer to you (im in Pontefract), as would loved to delve into your infinite wisdom of electronics and extend my knowledge, as i love learning when it comes to electronics. I do tinker myself, mostly with laptops, phones and tablets etc etc etc, just to earn a bit of money on the side and help friends out, but i dont know anywhere near as much as you, as all mine is self taught, starting from when i was about 4yr old and im 44 now, so ive learnt a thing or two but nothing to your level :) Ive got to admit though mate, your reaction when bridging the capacitor had me creased :) lol sorry bud, but i know that feeling all to well, and yes it certainly will wake you up hahahaha last thing that got me like that was a camera flash unit, which gave me a nice tickle, and resulted in the camera being launched across the room lol. But yeah keep up the good work mate, as i love your vids and your attention to detail (borderline OCD) matches mine exactly, so i always agree with your comments :) Ive binge watched just about all your vids now, starting from your latest ive got as far as this one, so not too many more to go Ive already learnt so much by watching your vids, so thank you for that! :) ive just subbed too! :)
Took the shock very well :). Just found your channel Mark please be careful so you can make more videos :)
Hey Mark just wanted to say that your videos are really excellent and I feel like you're gonna hit it big on UA-cam if you hang in there and keep uploading.
Would love to see you do a CRT repair if that sort of stuff ever comes your way.
I’m glad you like them! I’ve got a Hantarex CRT in the shop right now. I wasn’t going to film it, but I will now. Keep watching!
Mark
@@MendItMark awesome! Can't wait 👍
@@MendItMark Dont touch the CRT hv lead LOL
Ive watched that electric shock part loads of times and its still scary! Ive had some electric shocks myself and it made me say a few things I can not type here 😂
Love the instruction on your videos, it is a big help to a tinkerer like me, who has on from valve stuff !!Thanks Mark
Nice to see someone proving that IR camera can be used as T/S
That's happened to the end of my screwdriver and the end of my meter probe tips a fair few times, and even that wakes you up! Luckily I've I've never put more than a few tens of low current volts into my hand by mistake yet ... touch woo.... well hopefully not touch both terminals of a charged HV capasitor!!! ;)
I've started to wear rubber gloves if I'm poking around in powered HV stuff these days (as well as left arm behind my back), I'm getting more and more anxious as time goes on, as I feel I will eventually shock myself if I'm not careful, so am adding extra measures to avoid it haha.
Like your videos very much! Good work and entertaining. Can’t wait for the next one. Maybe some vintage electronics?
Thanks!
Hahahaa!! I've been watching Marks videos for months now and finally..... he swore!
Love your tip for checking MOSFET's - always used a checking/testing multi-tool before. Awesome quick check!
I really like your videos Mark. You really know your electronics and repairs. You already shown your bench and meters but I really would be interested in a video about your over current protection and short circuit protection system in your repair room. Keep up the repairs and I look forward for the next video.
Its a great fix, but when you consider the price of a replacement PSU is about £40 (not including shipping), when you add up the cost of the replacement parts and the labour cost for fixing it, you can see why most electronics ends up in a bin rather than being fixed. It is good to see the skills being put to good use, it's just a pity that there is just so little opportunity to make money out of electronic repairs these days.
Those MeanWell PSU's have quite a following in the States for CB-Radio use where they are paralleled for hundreds of amps
Your videos are both pleasant to watch and instructional -- really puts a smile on my face. Thank you for sharing (also the mishap)
9:40 That's something interesting to know. Cheers Mark 👍🏻 I love learning hand bits like that.
I've got one of those multi component tester's, but it's a LOT easier and quicker when you're already using a tester. Obviously it won't check it the same as a proper tester would. But it's nice to do a quick check just to see if it's shit the bed or not.
17:53 Your completely right Mark.
You could buy a specific tool to discharge cap's, but it also costs money which you could of used buying USEFUL tool.
But what you could of used to discharge cap's AND to save money buying the tool in the first place. Is anything metal that your not too worried about, if it ends up with splatter mark's or chunks missing out of it. Like a screwdriver or an old pair of pliers.
It's very quick, and very cheap. As your already using something you've already got.
20:20 Now THAT looks like one exspencive scope you've got there. What's the GHz?
Fawq-me sideways , 300v yep that will do it , love the channel 😂
Ouch! Been there, got that T shirt!
What a coincidence. I've just today finished repairing and refitting a Sargent EC400 to an imported caravan. The caravan had been in a flood and had been swept against a fence. Unfortunately, the battery had been connected and all the electronics were damaged. The charger/PSU was also a Mean Well, and was relatively easy to repair, but the relay board was a mess and had been burnt. It is a rubbish design; solder mask is black which makes reverse engineering very, very difficult, the relays are marginal for the current they have to carry and the keepout is ignored (solved with Kaptan). The RCBO and MCBs were stuffed of course, but that didn't matter because they would have to be replaced with ones of higher standard as required in our country. On the processor board the only thing that needed replacing were Electros, a poly switch, a couple of buffers (SMD ULN2803A), a few tracks. When I'd finished, I tropicalised the boards. Why don't all manufacturers coat their boards?
Anyway, best wishes. I really enjoy watching your repairs. Keep up the good work.
1st ⌚ viewer ⭐⭐⭐⭐⭐ Around 17:45 I thought to myself "where's the And-Sock mentioned in the title"?. We were all ShOcKed! :O) Cheers from So.Calif.USA, 3rd House on the Right.
That made me jump! Even though I knew the shock was coming, I thought "right, this'll be any second now", it still made me jump 😂