how to repair electronics for dummies part 2
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- Опубликовано: 13 сен 2024
- In this episode of how to be a man I go over the second part two repairing electronics for dummies. I show how to do basic testing of components like transistors, diode, capacitors, etc. and also fix a broken turntable.
#electronics
#repair
#electricity
#dummies
This was an old video, but really good. You should do more of these.
Great 2 part series. Learned a lot. Am looking forward to more on this type of stuff. Thank you.
You do a great job with the explanations! It'd be great to see a dedicated electronic repair station from you! The thoroughness is appreciated!
Put the old cap back in it and see if it works.Love this type of video. I've been trying to teach my boys, 9, and 12, about this stuff. I have an old laptop I'm letting them tear apart. One of my best friends moved to my town to open up a Radio Shack years ago. It closed long ago, but I miss the old days of repairing things.
We have an old home computer that the power supply is bad. You can get it running by blowing a hair dryer into it to get it going.
I am 12m into the video. This is an absolutely perfect video for anyone who has a multimeter, wants to learn, has some gear at home waiting for that repair and if you are eager and curious and consider yourself just starting out, I can say that the first 12 min got me to say that this is one of those videos I have been looking for. Excellent Video!
i hope you are young and you make a good choice ...im 40 years old and im looking this and buying tools .i wish i was have youtube earlier.elektricity is like game for adults and never ending process of learning
Alex Santos you talking very fast .sorry
As you said in Part I, caps are the most common thing to go out so no big surprise here. What may need to be mentioned here is that although the cap value may have been measured, the leakage (ESR) wasn't because your meters don't test for that. Gotta love the solder sucker!
Thank you for your time on creating this tutorial .
Excellent video. I did learn some things that will help me with fault diagnosis. Really appreciate the helpful explanations as you are moving through the video.
Really appreciate your posting this and I subscribed to your channel to learn more. I am fascinated by your common sense way of describing components. Look forward to many more insightful videos from you!
3:15 Testing Capacitors
13:07 IC (Integrated Circuit)
17:30 Diodes
19:56 Transistors
27:28 Resistors
29:59 Reparing turntable
I appreciate the video, I'm behind you for sure, but I happen to know turntables pretty well.
There is rarely an amplifier of any sort in those older turntables. If you weren't getting any sound out of it, and the motor wasn't turning, I would assume a bad ground/neutral. Or a bad power source, or sorry to say, possibly operator error. The cartridge usually just goes directly back to the preamp or reciever through the RCA cables, and get amplified there. Doubt you still have it, but it would be easy to verify the cartridge lead route.
Thanks for posting. I can't seem to find these type of methodical troubleshooting videos and I look constantly for them as I am self taught and need to watch the process. I hope you do more of these very well explained excellent videos. Thanks again!
wow thanks for taking the time out to demonstrate the different test procedures and explaining how the different components work.I think doing this type of work as a hobby might be well above my pay grade
Was feeling a bit wussy until I watched this video, now I feel like a dude again. thanks Dr. Chill
Would you suggest that "newbies" go ahead and complete resoldering with the rest of the power supply board (after it appeared replacement of the capacitor fixed the problem) to ensure that jostling of the wires wasn't giving a "false sense" of success?
as someone just starting out as a hobby, your videos are excellent man! one question is i seen that mosfets are sensitive to static and they sell bracelet things for grounding. but i never see anyone in videos using them and it looks like everything is fine. doesn't carpet make static or does it ground it?
Carpets and anything that looks like it produce static. Static accumulating on your body depends on the humidity of your environment and the clothes you're wearing that's why most people can get away without using an anti static strap.
Great video! This really helps a lot. Thanks for sharing!
Man, im an aerospace engineer, I have to give you a huge thank you. you are very good with this, this is my weakness. my Welder which is a old miller trailblazer 301G, has no output to weld. everything else works. i have a couple of boards to check. i cannot buy new boards for it. so im stuck. Do you ever work on the boards? Im retired from the USAF after 23 years. i dont have the money to buy a new welder. i thank you for a very good video. you need to do more .
I have never taken one apart, but I suspect there is a transformer in there along with some heavy duty diodes. I would check those if they exist.
Good vid. Didn't help me with my question(s), but good for others. Thx.
Just subscribed , some really use full things . Thanks......
I know that im late but you're the man for these tutorials
"I'm sorry this wasn't damaged as I was hoping it was" LOOL
as a kid growing up l enjoyed watching superheros but never really had one, but now that lm an adult l think l have found my hero in life......Mate, you are amazing.....thank you so so much
Your lessons are not for dummies at all. Anyone willing to learn can never be a dummy. And as you said, you have to count on previous knowledge in electricity and have been a good and pasionate math and science student.
You give a very helpful class and clarify those many existencial gaps everyone has sometime. Once you kill those it´s like talking positively to the fat guy. Everything flows!!! Can we know your name and background or at least the last? Many thanks man!!!
the "dummy" term comes from the self help books titled "for dummies" do a google search.
thank you so much for this tutorial.. love it.. i learned a lot..
Explained in easy to understand and a real problem solving. Great video.
i would have done it in this order: 1-Voltmeter, check voltage everywhere starting from output of transformer in ac, then if no voltage somewhere, 2-check parts, wires,circuits tracks and solder joint and 3) resolder/change bad components. This capacitor you change just smooth dc and keep ac noise low, you should have the turntable working but with lot of noise (like in mine!). You solve the problem by resoldering I think it was a cold or broken solder joint. Well done any way !
I figured it was that or one of the wires is loose. I'm keeping an eye on it.
+HOW TO BE AWESOME SAUCE I was waiting for you to show taking a diode out of circuit to test. The reason I'm asking is I have a newer pinball machine that I'm suspecting has a bad flipper diode. I was told by someone that works mostly on the old EM pinball machines tell me that you can still test a diode while it's still in circuit and get an accurate reading. I've always have been under the assumption that diodes can't not be tested while in circuit.
they can be sometimes, but just undo one side of the diode and see if current goes only one direction. i have a pinball machine and sometimes they diodes do go bad, but their might be a capacitor nearby also causing it. if it doesnt work at all, check the board's transistors. they go bad all the time.
Thank you for the advice. The pinball machine works fine for the most part. Every so often for what seems like no reason the machine would just stop. The back box is still lit but the playfield goes dark and flippers cease to operate. The best way to describe it is if the machine is tilted even though the tilt light doesn't come on. I was thinking the best place to start would be a possible flipper diode. I also thought the only way to test a diode was to remove it partially out of circuit. Thanks again for your help.
Good video
Great Video ! Keep them coming. Sub.and liked.
Excellent teaching understood thanks you
i love these troubleshooting boards ❤️🥰 so much learning😊
I would go on ebay and buy a transistor tester which coast like 20$ and can check, diode's, capacitors(and checks ESR), resistors, led's, just about everything. It is 100% worth the money....It will check everything in this video, except IC,s....just type in transistor tester in ebay and see...Great video by the way thanks...
Excellent tutorial big tumbs up HOW TO BE AWESOME. You are awesome!!
Nice Channel. You got my subscription
I perfectly understand where u got it from. It was just a mention. Tks for the great info!
Good video. Good at showing how to test and thinking behind it as well as process. I have some older battery chargers that worked great before and now don’t work, I am going to try to figure them out.
Thanks a lot 😊🤗🤝 Can you please make a hometheater vid?
Your a great teacher thanks.
I have seen a couple of your videos. thank you. you explain in very needed detail. It would be a dream if you would make a video, but, use your professional tools like Your flukes and IC tester and other what-not professional tools as well as some test setups for testing IC chips and explain the use of those tools the way you do on your videos. just a dream that's all. thanks again.
Ugh... I'm so disappointed I fixed it. I was hoping it would give me a hell of a time, but NO I just HAD TO fix it in the first 5 min, damn it.
Wonderful and simple learning thanks, been very helpful for me
Very interesting good insight into electronics.Thanks
Excellent video you produce. Thank for posting it to RUclips.
Are u Bruce Willis.? Always found his voice soothing and listenable...good deal
My professional radio repair trouble shoot routine:
0.) Warning/Caution: Dont't touch (finger tip could induce your power network frequency) before you measured with a working DMM no electrical voltage potential to your ground to keep your safety! Otherwise this should be done by professional service personal!
1.) Watch out for bad things like broken/smoking fuses, connections & electronic components (R, C, Transformer, Diodes, Transistors, ICs ...),
2.) Start from power supply on dead devices: measure voltages - 2.1 AC before & behind fuse, transformer, 2.2 DC behind rectifier, 2.3 compare your measurement with data sheet information of the electronic components, if DC voltage is missing you may put it from a lab power supply just to test your expectations,
3.) signal tracing from source to output on silent audio devices (working lamps / motors): put a hearable signal frquency - like signal function generator on pre amplifiers input pin or sound pickup connector: 3.1 If a connected amplifier with speaker doesn't buzz, go further down audio signal way forward until pre amplifiers output and 3.2 stop until you hear your test signals frequency. Now your behind the problematic / defect parts. 3.3 Now go deeper inside why this region of the circuits does not work well, draw the circuit & compare with basic circuit knowledge and check data sheet properties of each component what (should) it have for normal operation? 3.4 If nothing is clear: consider "brute force method = exchange every electronic component", with estimating component costs and probability of lifetime / failure - e.g.: typical probabilities: higher power = more failures ...
Great video. Thank you.
thank you verry much for teaching !!
I’ve got an old boombox that is missing sound to one channel. If i pull the board that contains the pot to balance amongst others, and bend it, the problem inverts. As in the previous non-working channel starts receiving sound and the previous working channel loses it’s sound.
Hello I'm just starting yo learn electronics and this video is great ! I inspected a ps1 slim motherboard and there are a lot of capacitors (very small) with no number on it and have mostly a coffebrown color or black . how can I know (if one is bad ) what the value is ? thank you
you are talking about surface mount components. They are tested the same way, but takes a stable hand. The caps are probably not bad. The values would be in the schematic. that would be the easiest way to see them.
the only caps that I would check would be in the power supply. Other than that, it is probably diodes, rectifiers, or ICs that took a crap.
So if there is no obvious signs i have to physically unsolder and remove to check? What if there is like 1000 of each component? Im asking because im actually curious
With a zener diode, once the zener voltage is reached it will allow current flow in both directions. Zener diodes are the only diodes that will allow current flow in both directions.
yes
So what are the odds of being able to diagnose a bad component on a motherboard without a schematic?
this helps a lot for learning. thanks!
YOU ARE THE BEST!! I wish you were my professor
Oh Gawd. The blind leading the blind.
Thank you for your time. I'm currently working on my Atari 400 and was looking for a refresher. By the way you sound like Bill Murray. Anyway again. Thank you for your time.
Sounds like Doug Mckenzie to me - so awesome!
Thanks this was informative for the total beginner.
Well explained! Thanks !
Ever come across a circuit board that covered in that hard yellow glue? How do you deal with it? How do you remove it?
Hi What is the Cx in your black meter. I got a new one and have know idea what it is for….
Hi, thank you for your videos. I'm a newbie to electronics. Now, at the very process of buying a new multimeter.)...I have a question. So, for basic troubleshooting of home appliances, your multimeter have to have some basic functions only, like resistance, voltage, current, continuity/ diode test, right ? no need for capacitance, hz, temperature, induction ?
Is it enough for resistance scale to be up to 200 Mohm, maybe more ? and, how important it is to have mili and micro amps on the scale ? Thank you
buy you a cheap multimeter less the 10$ it will do any thing you need or tbl shooting i am 88 re- tired tech i keep 3 or 4 those cheap meter shop -desk -tool box .-etc handy believe me master the little meter it will be all you need
Thank you for a very good video, it was most informative and you really covered so many things along the way. I hope you continue making more of these videos.
Lots of good info but all TO92 style transistors don’t have the emitter in the same location, you need to google the pinout.
Do you ever use an oscilloscope?
As you said when resistor go bad it burns. So when you have to replace it how will you know what was its resistance.
Moshitoa south Africa
sometimes you can still read it. sometimes it is printed on the board. other times you will need a schematic.
hi there could you help me at all? i connected a rechageable 12v battery to an electronic device that takes 8x1.5v batteries. i connected it to the positive and negative of the battery spirals, something smoked and the equipment doesnt work. would you be able to tell me what i could possibly do to fix the item. (its a digital guitar amp - yamaha). thanks Pete in Ireland
good video education is power.
A can of freeze spray is a useful tool and can help find intermittents in solid state parts and caps. Just don't spray yourself.
I have a board from 1986 that has electrolytic capacitors with 3 legs, I ordered new parts but could only find 2 leg versions. I’m wondering if I should use a jumper cable or wire to the third connection. I believe the one I’m looking to replace has two slots on the board that share the negative side if that makes sense.
I’m also wondering if the 3rd wire is just for stability
Is the piece or carpet ok to work on from a static electricity perspective?
thanks man uv really increase my knowledge in electronics
One day it will be like Necromancer. I can beam the whole thing into my brain. I am debating watching the whole thing or watching pineapple jerky.... Although when you mentioned old turntable or electronics generally... I was waiting for the in the old capacitors about the juicy carcinogenic PCBs
The cracked solder joints are caused by thermo cycling.
Thanks so much, this tutorial is quite practical.
Great video; thanks!
that turntable looks a lot like my aiwa turntable. btw great vid
What was the soldering gun used to remove diodes from circuit board? Thanks
Shouldn’t you be discharging the capacitor before replacing it? I have been shocked a few times.
Nice video!
If you're still alive i want you to know that i love you thx for this video
great info thank you for your efford
Great explanation thank you again.
Bro what's the brand of the transistor tester you use
Why didn’t you use the Capacitance slots on your Multimeter.
vary nice next with own procedure
the easy way to repair electronics is plug in anew card and can the old card
Do you have to take the parts out of the board to test them?
Not all of them
I'm a retired tech but still, do my own repair. Electronic parts are very hard to find since Radio Shack is closed. Where are you buying your parts?
online mostly. locally all the places shut down.
Use Digikey or Mouser!
There are three way to test capacitor... Breakdown voltage test, ESR and capacitance test and you should always take care when testing capacitors. discharge them first. Good video though.
I'm having a problem of losing some input channels on my Kenwood KA-109 home amplifier/receiver. Phono stage works but does not go through the IC. The inputs going through the chip are gradually quitting. I just ordered all new capacitors for the tone board and when I replace them, I also am going to try to fix the input problem. I am not good enough to solder the 28 pin IC chip, and was wondering if I could bypass it and hook up just the CD input to the output of the IC to the amp board. I only listen to CD, but the phono stage isnt the right level for the CD player.
replace the IC. if the IC is bad, nothing else you replace will fix it.
Great advice! Just diving into this, It would be great if I can get assistance with my new radio... (project car) battery was put in backwards at one point got it apart, I can see two items that are burnt but you cannot get the entire numbers off the parts...
might have to do a web search from the schematics
Good video :-) .. I know nothing about electronics, so always good to learn something new :-) thanks :-)
There is one thing that confuses me, is it not normal that there is a fuse in such a machine ??
Hi sir. How do you test an IGBT? Any links with clear explanation in English?
Great video! Keep on the excellent work, dude!
really appreciate your work Ive learnt a lot from your channel , it would be really great if you make a video on a homemade 200 watt inverter,. :)
I appreciate you
Sir, can you upload smd type inverter circuit board checking
Great clip!! I just wish consumer electronics were still worth to repair. :+
If you own them they are.
I've got 8 computer monitors in use and around a dozen or so not in use .
so... do you know how much it would cost to replace them , the one's in use
around... say.. $200 a monitor for 8 Monitors we are looking at around $1500 ish approx.
ok, so i have now been keeping these monitors alive for the last , probably 10 years.
24" monitors that , FROM TIME TO TIME, the screen goes out, and when it doesn't it's always the same thing
THE FILTER CAP
the cap costs me around 30cents to buy
I reckon i've probably chewed around $20 to $30 over the last 10 years haha
i'd say that's viable for repair
let's not mention all the other shit that i've repaired over the years and in the course of my entire life since i was 6
a little while back i repaired my webcam, which.. is not something you would really think to do .
Cold solder joints and a lose power cable that was starting to fall off
that's now been alive for around 8 years
anyway, i could go on and on , but i won't
i agree that if your'e gonna pay someone for it, it's probably not viable , i mean
the guy should be charing you around $120 to $200 for the call out and fix, but then it could be more depending.
so if you have , let's say a 100" HD TV that you bought for $5000 and the motherboard dies , with repair costs you could be up for $400 approx.
now. the same job on a smaller TV you bought for $150 even though its' the same thing... replace the motherboard, it's not worth it.
but then you have some clients who don't give a fuck and pay anyway
so... yeah... each to his own
BUT.. THERE STILL IS A MARKET FOR IT
not as big as it was back in the day, but it still exists
I have a 1970s Mattel electronic game Uses a 9V battery. I get 9v on the PCB were the battery connector wires are soldered but the game it dead. I dd notice after a while the battery was getting hot like it was shorting out. Any ideas what it could be causing that? The game looks almost new really great shape. Note battery is fine on other games.
I have no context of what the board looks like. if the battery is getting hot there is a short. test the transistors, diodes, and any capacitors on the board.
thanks one more thing when i hook up the resistor to the charging circuit should the resistor and the diode be hook into the same circuit
I have no idea what you are building or repairing so I cant answer that.
Great job on this video . I've learned a great deal here. Just one question for you. Is there a " go to " online store that you get capacitors and such from ? Thanks again !
i shop all over the place. some things I can get locally, but its pricey. I sometimes order in bulk for things I know ill use from china. if I'm in a rush, ill do ebay.
that's why ESR meter is a must