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Zorluk: OrtaSafety Procedures and Environmental Controls

A field technician is preparing to install a replacement motherboard into a desktop chassis at a customer's desk. Which of the following procedures should the technician follow to best protect sensitive electronic components from electrostatic discharge (ESD) damage during assembly?

  1. Attach an ESD wrist strap's alligator clip to an unpainted metal portion of the computer chassis.Cevap
  2. B
    Place the replacement motherboard directly on the outer surface of its protective anti-static bag while installing the CPU and RAM.
  3. C
    Touch the plastic outer housing of the monitor periodically during installation to discharge accumulated body static.
  4. D
    Maintain continuous contact with painted outer side panels of the desktop enclosure while handling internal system boards.

Cevap

Attaching an ESD wrist strap's alligator clip to an unpainted metal portion of the computer chassis equalizes electrical potential and safely prevents ESD damage.
Attaching the ESD wrist strap to an unpainted metal surface ensures a direct electrical connection to the chassis, equalizing static potential between the technician and the system chassis, thereby preventing static charges from damaging microprocessors and surface-mount components.

Adım Adım Çözüm

1
Identify proper ESD grounding practices for handling computer hardware.
ESD wrist straps require a bare metallic connection to equalize static charges between the technician's body and the equipment chassis.
Unpainted metal provides an uninterrupted conductive path to ground/chassis ground.
2
Evaluate potential hazards associated with anti-static bags and insulated materials.
Recognize that outer anti-static bag surfaces, plastic housings, and painted metal surfaces do not provide safe grounding paths.
Plastics and painted metal act as insulators, while the exterior shell of static-shielding bags can collect static charge.

Anahtar Kavram

ESD Safety and Grounding Protocols
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Konular

Safety Procedures and Environmental Controls

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