Understanding Electrostatic Discharge (ESD) for Technicians
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- Опубліковано 22 бер 2016
- This video is intended to help computer field service technicians understand electrostatic discharge (ESD) and apply techniques to safeguard against it. This video is part of a warranty service authorization curriculum for Lenovo service providers located at: lenovolearning.bhivesoft.com/
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A well prepared and presented video that is teaching a lot about ESD.
7 seconds in I see this guy and in I am confident he is right across computers and ESD
Great job👏 Thank you super informative with funny moments 😁🙏
Thank you Mr.Sloss
Very informative video.
ESD control is pretty simple, if you focus on the basics
Establish an ESD Protected Area. Ground all conductors including operators.Use a dissipative grounded surface.Remove all non-process essential insulators from the ESD Protected Area. Use
ionization to control charges on process essential insulators.If an ESD susceptible item needs to be removed from the ESD Protected Area, place
it in a shielding bag or storage container that forms a faraday cage.
I'm confused, so there are two ways to ground yourself? 1st way by attaching the wrist strap to yourself then to the ESD mat. 2nd method is to attach the wrist strap to yourself then onto the computer case (chassis). What if the case is painted?
Ok you've lost me
Great video :D
Thanks for all the tips 🙌🙌🙌
Happy to help!
Just awesome....
this video is gr8
Nice video
Great video! Made me chuckle
Thank you
Hi
How does touching the metal case of the computer help to discharge the body of electric charge if the computer is unplugged?
My view was that you can only discharge the body if connected to an earthed/grounded cable?
Your case is a grounded object, it works on the principle of a faraday cage. So touching the (unpainted) frame of the case will ground you.
I'm confused, so there are two ways to ground yourself? And you only need to use one or the other?
1st method: Attach the wrist strap to yourself then to the ESD mat. (you're grounded?)
2nd method: Attach the wrist strap to yourself then onto the computer case via the clip. (you're grounded?)
But in this video you have the wrist strap that feeds to the mat that feeds to the case. Do I need to do all of that? And what if there's no bare metal in your case (just painted metal)? Touch the computer screws on your PSU? I also thought that you needed to have your PSU plugged in but turned off.
Can we do the service for any electronic components like cpu,ecu etc...without esd protection?
Hi Excel vba automatic sent mail! Generally, we can service electric components without ESD protection, but it's not recommended. If you have any issue with any Lenovo electronic components, we recommend bringing it to the nearest Lenovo Service Center. Rai_Lenovo
Will just a grounding wristband that connects to the computer be good enough, And also if I work on a table, standing on a wooden floor would that help prevent ESD?
Yes, a grounding wristband hooked to bare metal on the computer will work.
Nick Brown it has nothing to do with ground. Its all about reference. You want both you and the case at the same potential. The only way for there to be discharge is if there is a place for it to have a dissimilar reference. Ground is not needed. Both you and the case can be charged but if you both are referenced together theres no flow
Do I need to plug in PSU to power/ keep the switch on ? Or switch off? Or unplug from power?
Shut the system down, turn the switch on the power supply off and unplug the power supply.
@@LenovoSupport if you unplug the power cord, the computer chassis is no longer grounded, and attaching the alligator clip to it will not help you.
well explained (y)
thanks
In my laptop undoing changes to made your computer
So what can we do
Hello! We are sorry to know about the issue.
Please provide your country and serial number lnv.gy/346CXP3 for checking.
Thanks! Diox_Lenovo
What do i do if i dont have the kit do i just put it on a table? would that work?
+Hasoon nine Yeah you can just put it on the table. You might want to watch the consumer version of this video ua-cam.com/video/by4PB3WtdLo/v-deo.html
Use a ESD strap to connect yourself to the case and slide the computer around on the table as little as possible.
Mike D i just did it on a glass table and everything went well
Its all about potential energy. You need to safely neutralize the charges. The case need not be grounded to earth. You and the case just need to be at the same reference. Think of why a bird doesnt get shocked when it touches a power line. Same instance. You both could be charged. The case and you but if theres no current flow there is no discharge. Connecting yourself to a ground can also be a bad idea. What if theres a ground fault in your wiring and now your the ground rod.
Are ESD safe screwdrivers and pliers necessary?
Hi Yeomer! Thanks for writing in. Basically, it's advisable to have an additional tool aside from the ones provided in this video, which in this case are the safe screw drivers and pliers. Erica_Lenovo
LenovoSupport On the other hand, there are people on the form at eevblog saying that regular precision screwdrivers are sufficient for general use as long as you ground yourself properly. Could you please confirm if that's true and whether if it will damage components like MOSFET in contact with regular screwdriver despite being grounded?
If your're properly grounded then that should be fine. Then again, it's advised that you use ESD protection all times as you can never be too careful when dealing with electrical components. Erica_Lenovo
in many countries the main problem is the moquette
You place a RAM component on top of an ESD bag!!! Thats really really bad!
'cause the outside of the bag is conductive right? Same thing with people who do that with motherboards I assume.
Entertaining video but with a huge error: we were told to ground ourselves and our mat to the computer case, but at no time did we see the computer case grounded.
The easiest way to ground ourselves is to use the ground terminal in a power outlet...AFTER we have established there's no voltage on it, which could happen due to a short or an electrician's error. Stick a conductor into that ground, then connect that conductor to the wrist strap. Some wrist straps have a conductor on them that lets us plug right into the earth ground terminal. Do the same for the mat.
Touching a metal computer case is better than nothing, but not enough to eliminate the need for doing it the right way.
Do a search for ESD APPLE. You'll see a short 4-part series that corresponds much better to everything I ever learned about ESD.
Hope this helps.
Perhaps the wording is a bit off but I'm not sure I would call that a "huge error". The goal is to be the same electrical potential as the device that you're working on. If the computer is on the mat and you are connected to the mat then you're at the same potential.
The term "Grounding" is misleading, as he stated you need to be at the same potential. The reason for grounding is to put all possible work stations to the same potential. The only safe and common potential available is earth ground, hence the term grounding.
Putting the computer on the ESD mat is "grounding" the case as long as the case touches the mat and you are connected to the mat. It does not have to be clipped in to be "grounded".
This was a great video except there is one critical error in this video. You took the RAM chip out of the anti-static bag and placed it on the bag! Anti-static bags hold static on the outside of the bag to ensure there is none on the inside. This means you just caused damage to the RAM chip by placing it on the bag where all the static is. That's ruins the whole point of all the other anti-static measures you took. You should comment that part of the video out or replace the video completely as it's very bad advice.
I couldn't agree more. What a fundemental mistake to put in a video about ESD for technicians. All that hard work has just gone completely out of the window.
Properties of an ESD bag.
ELECTRICAL SHIELDING: (Faraday cage) to minimize an electrical current (voltage discharge) or ElectroStatic Discharge (ESD) from penetrating the film thereby "protecting" the contents from being damaged by an ESD.
No. You're wrong. There is no visible indication of the amount of static present and no visible indication of ESD damage unless you happen to have an electron microscope with you. The only solution is to ensure you use a grounded ESD mat if you need to put the component down. I don't know why you feel you need to argue the point.
But this video has come from a major hardware manufacturer and is directed at technicians. Mishandling of ESD sensitive components has a direct financial impact to their business. It's just irresponsible.
I'm confused, so there are two ways to ground yourself? 1st way by attaching the wrist strap to yourself then to the ESD mat. 2nd method is to attach the wrist strap to yourself then onto the computer case (chassis). What if the case is painted?
Yawa module
This is why I will never buy a computer at a computer show. I have watched them running around on carpets, working on the carpet putting their systems together all with no mats or straps. EEEEK ! ! !
That's why I don't trust others to build my computers or work on my electronics. Many of those chips and 5 and 12v and I see people handling components haphazardly like amateurs.
Leave the power cable attached, power supply turned off. If you unplug the power cord, the computer chassis is no longer grounded, and attaching the alligator clip to it will not help you.