Troubleshooting With Diode Mode
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- เผยแพร่เมื่อ 16 มิ.ย. 2021
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docs.google.com/forms/d/e/1FA... There is a mode on most multimeters that fewer and fewer technicians understand: Diode Mode.
Let's take a look at how this mode can help you troubleshoot.
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Every good tech has a diode mode troubleshooting video.
Currently learning about solid state devices in class rn. It’s cool to watch this video and already know some of what you are talking with diodes forward/reverse relationship.
Your videos are always so helpful. Keep it up please.
Good stuff Justin thanks for sharing your knowledge with us bud👍🏾🤙🏾
Why do some coworkers get mad when I use diode mode saying can break the board? It only uses a very low 0.4v like to 0.8v depending on the line being tested not enough voltage to break something.
useful vid thanks for this
Keep on man
Remember to check the diode with one lead outside of the circuit first. There may be some capacitance or resistors across that diode. Also check out the reverse results of using an analog diode meter.
I should make a video which explains that a little better. Ground plane diode mode testing (especially between a good and bad board) is a quick method to narrow down the defective part of a circuit
OL - Open Line
What are those rules of repair on the board behind you?
th-cam.com/video/PWz9Hh2x5Qk/w-d-xo.html
@@BetterBiomedChannel Very good ones. But number 7 is correct only if people around you are very bad.
Learner here. I don't get the third one, if there is a capacitor charging through the diode, what is the increasing voltage up to 2.8V?? The diode cannot conduct that way (you are checking in reverse when the voltage increases) so the multimeter just showing potential difference there and not voltage drop? Please clearify. Thank You.
EDIT: Ok i was just thinking about that, the current 'flows' the other (the 'right') direction while the capacitor charging and the diode is forward biased but then, how can 2.8V drop on that diode (even temporarily until the cap charging) when they can drop only 0.2-0.7V normally?
Write me at abetterbiomed@gmail.com
@@BetterBiomedChannel Sent the mail, thank You.
sir when you are taking readings of components when they were soldered to the pcb when we take readings like that other electronic components may interfer the readings and will show false reading doesnt it , teach us how to take reading without removing the components ( good or bad ) to trouble shoot an issue you must remove at least a single pin from the pcb
When testing a diode in diode mode, you usually do not need the component removed from the pcb. When testing resistance, the component needs removed.
I guess I should have prefaced the video by saying one side of each diode looks like it's connected to a pin on the connector (which would make 1 side open as long as nothing is connected to that connector)
Keep in mind, that only "normal" silicon / germanium diodes can be tested with Diode Mode.
Diodes like Zenerdiodes, TVS diodes etc....with a higher breakdown then the measuring voltage signal of the multimeter, can not be measured and will show O.L on the multimeter, so don't assume yet that the diode is open if you don't get a reading. On most Zenerdiodes, the breakdown voltage is printed, but this is usually so small, that it is difficult to read when they are installed on a pcb. On TVS diodes is only the typenumber printed and not the breakdown voltage.
👍 ThX for the insid..
Forward bias on a zener will loook like a common silicon diode.
Tolong tambahkan transalate bahasa Indonesia
reverse bias, forward bias? huh?