Question

Lenovo if you don’t have a field kit handy, constantly touching which components in the chassis will give you zero potential for esd?

A) Constantly touching the motherboard.
B) Constantly touching the hard drive.
C) Constantly touching the power supply unit.
D) Constantly touching the cooling fan.

Select the component in the Lenovo chassis that, when constantly touched, will provide zero potential for electrostatic discharge (ESD).

Answer 1

The power supply unit in a Lenovo chassis is the component to be touched to maintain zero potential for electrostatic discharge, as it is grounded and ensures equipotential with the earth.

Step-by-step explanation:

The component in the Lenovo chassis that, when constantly touched, will provide zero potential for electrostatic discharge (ESD) is the power supply unit (PSU).

The power supply unit is typically grounded, making it an equipotential surface that would be at zero volts relative to the earth when connected through a proper ground. Unlike other components within a computer chassis, the power supply unit has a ground wire that connects to the earth ground through the power cord.

Grounding is a useful safety tool as it ensures that there are no voltage differences across the surface of a conductor, and therefore, no charges will flow that could cause electrostatic discharge. If one is not using an ESD field kit, touching a grounded part, like the PSU, helps to ensure that their body is also at an equipotential, minimizing the risk of damage to sensitive electronic components.

Additionally, working with one hand can further reduce the possibility of ESD damage by avoiding the creation of a potential path through the heart that could allow for a harmful current if the body was at a different electrical potential than the device being worked on.