How Voltage Injection Works

Have you Injected voltage before?

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PACE TIPS:

[awaitingthetrumpetcall]

I appreciate how you started with the MOST simplified diagram possible. It's actually genius. I'm a hobbyist and I have several faulty PCB's lying around. At the start of any troubleshooting process I will now start by testing for continuity between the ground plane and the power rail. If I want to test a specific circuit on a PCB I'll use the same principle to narrow it down.
I subscribed.

[expattoby]

Basic tutorial videos like these are great to share with our beginner techs! Thanks!

[RN]

Great explanation - thank you!

You can also use a rosin atomizer instead of alcohol or a thermal camera. Cheap and effective!

[hightechstuff]

Another way to preform finding shorts is by measuring resistance. You can simply poke around while looking at the resistance. Whichever capacitor reads to lowest resistance, that one is typically the problem. Typically you are in the milliohms when dealing with dead shorts.

[EggplatnmWatch]

Great video for beginners, and it's nice you talked about the evaporating liquid as an alternative to the thermal camera, because like you said, they are expensive

[kieferonline]

Very good explanation about voltage injection. You've got a talent for teaching! Using the simple paper diagram is low-tech and genius! Better than the real thing.

[Nordmanden]

Thank you so much for taking the time to explain the very basics of the operation and functionality of the tool 👌🏼😊 There’s lots of videos of technicians repairing shorts, and one could always try to replicate what the video shows but not something I would want to do… For me its essential to actually understand what I’m looking at and what I’m doing, because if you don’t really understand it then you’re not really learning anything…
Very grateful👌🏼🙏🏻😊

[weaselstonk]

Thank you for the tutorial! Excellent explanation and it was exactly what I was looking for.

[saeedsamikhan]

tried this method on a vdd main shorted rail but could not spot the shorted componant..the only componants that would heat up were the ones on which i touch red prob for injecting😢

[williamd]

That's a great simplified vi procedure 👍👌

[vihangatck]

This was very useful! Thank you! I have an amplifier and no matter how much I check it, replace components, the fuse blows up. I'll try this method and see.

[_mylastname]

Rename this Electronics for Dummies.. love the simple explanations! Thanks kindly

[thebatu]

Hi, thanks for the explanation.
I’m trying to fix a smart bulb with several dozens component on it (no obvious damage visible).
I do have 12v 5a power supply (for my led strip) but no short circuit detector.
Could I still check for shorts with just the multimeter?

[gordthor]

Sometimes I use alcohol when I can't find the short. It can be frustrating and a drink helps. :)

[SlickBuysModsandRepairs]

Super informative video here. Types of videos like these are the ones beginners, such as myself, need. Perhaps when titling your videos, adding something along the lines of “console repair lesson” or “electronics repair tutorial” to the title will help beginners find your video easier. For example: “How Voltage Injection Works - Console Repair Lesson #1”. Just something to think about :)

[daytonagreg]

Noob Question: If I think there is a SHORT, I typically remove the Logic Board from the Laptop case & I have the DCIN Adapter & Logic board for testing. Then I plug in the Adapter (where it is "normally" powered) hoping to test voltages at various points.
What's the difference between that and Voltage Injection? Is that the same EXCEPT that you are "injecting power" at some INTERMEDIATE POINT?

[Martin-otxj]

Hi, my question is as your explanation we can inject voltage on any component ( capacitors) on the mainboard ? i mean black Probe to Ground and red Robe to any capacitors and then with alcohol we can find short ? or we must inject voltage to specific capacitor ? thnx

[leso]

what is the max volts & milliamps used with this method ??

[luiscortez]

Thanks for the video, can you please do a video on your thermal camera?

[kodieivie]

Are there components that you shouldn't inject voltage into? Like diodes, resistors, MOSFETs? Anything that's shorted on both sides okay to inject voltage on?