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  • Hi, I'm Brandon with Lenovo,

  • and I'm here today to discuss electrostatic discharge.

  • In this video we're going to be going over three main topics:

  • what is electrostatic discharge,

  • what types of damage it can do to computer components,

  • and common prevention methods.

  • So, what is electrostatic discharge?

  • Electrostatic discharge, or ESD

  • is the sudden flow of static charge from one object with a higher charge

  • to an object with a lower charge.

  • Have you ever rubbed your socks on a carpet,

  • and then touched your friend to shock them?

  • Or have you ever been touching a doorknob or car door,

  • and received an electrical shock?

  • If you have, then you've experienced ESD.

  • The shock that you felt came from when the current on your body

  • was passed to the other object.

  • In this case, the car door, door knob, or your friend that you shocked.

  • This same type of discharge can occur when working an in open computer,

  • damaging vital components.

  • This is your computer.

  • This is your computer on ESD.

  • There are two basic types of damage that ESD can cause to electronic components:

  • immediate, and latent.

  • Immediate damage is obvious,

  • you can shock a component on the spot, causing it to quit functioning completely.

  • This type of damage is rare,

  • but at least you know the component has been destroyed and needs to be replaced.

  • Latent damage is a little more subtle,

  • With latent damage, you've only discharged enough electricity into the component to degrade it,

  • and not completely destroy it.

  • This type of damage can cause problems with the long term functionality of a component,

  • and decrease its lifespan.

  • So now I'm going to give you a brief overview of the contents of the ESD field kit.

  • So this is the anti-static mat,

  • and it folds out to form an ESD workspace that is portable and can be used anywhere.

  • You use this to ground yourself to the workspace,

  • to ground yourself and the machine you're working on.

  • This next piece is the alligator clip.

  • You're going to use this when you want to ground yourself to the bare metal of a chassis.

  • This piece here is the ESD wrist strap.

  • You're going to use this to ground yourself to the alligator clip,

  • or to ground yourself to the ESD mat.

  • The part of the wrist strap that actually grounds you is this metal piece right here

  • making contact with your skin,

  • so you're going to want to make sure that it's tight to your skin at all times.

  • And finally we have the cable.

  • This connects the wrist strap to the mat,

  • and to the alligator clip.

  • The kit you have may differ from the one that I just showed,

  • but the grounding methods for every kit will be the same.

  • If you have a larger mat in your kit

  • you can use it to ground a server,

  • or a desktop,

  • or anything that will fit on the mat

  • The mat and strap are your first line of defense against ESD,

  • but there are a few other considerations to take into account.

  • You can make yourself and the computer have zero potential of ESD

  • by touching bare metal on the inside of the chassis,

  • or touching the power supply case constantly while working inside the computer.

  • Most computer components will come inside of a static protective bag.

  • It's a good idea to leave the components in the bag

  • Until the moment you're ready to replace them in the system.

  • You'll generally want to be standing when working inside of a computer.

  • Sitting on the floor, or sitting in a chair can cause static to build up-

  • Increasing the chances of an electrostatic discharge.

  • You'll want to be standing firmly on a hard surface,

  • and the machine that you're operating on should be sitting on the table.

  • You'll want to make sure to disconnect all cables and cords from the back of your system:

  • Power, keyboard, mouse, monitor, peripherals...

  • Everything.

  • Clothing is insulated, so it can maintain a static field separate from your body.

  • You'll want to avoid wearing clothes that are prone to gather static.

  • You probably already have a good idea of what type of clothes these are,

  • but it's a bad idea to wear wool or some synthetics.

  • It's a good idea to wear short sleeves

  • to minimize the risk of your clothing touching computer components.

  • Did you know that lumberjacks can work on computers too?

  • In order to prevent ESD and reduce other complications,

  • you'll want to remove any jewelry or accessories before operating on a computer.

  • This concludes our video on electrostatic discharge.

  • Hopefully you've come away with a good idea of what ESD is,

  • what types of damage it does to electronics,

  • and how to prevent it.

Hi, I'm Brandon with Lenovo,

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ESD 保護 (Understanding Electrostatic Discharge (ESD) for Technicians) ()

  • 36 4
    蔡宏宏 に公開 2017 年 07 月 28 日
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