Download Safety

Safety
Overview
Take notes
You will be tested
Essential Questions
• Which specific computer components
require special care when handling to
protect your safety?
• What is the proper way to lift heavy
objects?
• What is the proper use of fire extinguishers?
• What is the function of an MSDS?
• What is the procedure for reporting a
hazardous situation or an accident?
Safety Topics
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Personal Safety
Power Hazards
Power Supply Hazards
CRT Monitor Hazards
Thermal Hazards
Physical Hazards
Lifting Hazards
Fire Extinguishers
MSDS
Report Hazardous Situations and Accidents
Personal Safety
• The most important part of any job you
will ever do around electronic
equipment is personal safety.
• Your primary responsibility is to
ensure the personal safety of yourself
and others.
Power Hazards
• Any time you work around a computer or any
electrical device, make sure the grounding pin
of the 110v plug is intact.
• If this pin is missing, just touching the device
can electrocute you, even if the device is turned
off.
• Never use a cord that is damaged, cut, or missing
the ground pin.
First, UNPLUG!
• Always unplug the power
cord from the wall, for
any device you are
working on.
• Before opening the
device, wait 30 seconds to
let electricity dissipate
from the device.
Power Hazards
• Never work on a device until you have
unplugged it from the wall.
• If you are working on a portable device,
make sure the battery is out of the system.
Power Supply Unit (PSU)
• Power Supply Units
(PSU) contain
capacitors which store
high voltage electricity
• There are no
serviceable parts in a
PSU
• CompTIA (A+ exam)
states that a PSU is
NEVER to be
disassembled
Power Supply Hazards
• Capacitors store electrical charges, even when the
device is unplugged.
• Capacitors in a high voltage Power Supply Unit
(PSU) can retain enough current to kill you, even
hours after it has been unplugged from the wall.
• This is why a PSU is a Field Replaceable Unit
(FRU) not a serviceable part.
• In the computer repair field we are concerned with
the high voltage PSU that can be found in a
desktop PC and in a laser printer.
• Never attempt to service the PSU of any device.
Laser Printers
• Laser Printers use high
voltages to create
images.
• The power supply of a
laser printer contains
high voltage capacitors
• The PSU of a laser
printer is a Field
Replaceable Unit (FRU)
• CompTIA (A+) states
that the PSU of a laser
printer should never be
disassembled
CRT Monitor Hazards
• Another source of high voltage is
a CRT monitor.
• A CRT monitor also contains
capacitors that store enough
electricity to kill you.
• Do not work inside a CRT
monitor.
• CompTIA (A+) states that a CRT
should NEVER be disassembled
High Voltage Components
Three things we NEVER open
• Power Supply Unit (PSU) in a computer
• The Power Supply Unit in a Laser Printer
• CRT monitor
• The symbols that warn of dangerous voltage
Electrical Shorts
• A short is caused when electricity is crossed between
two circuits that should not be connected. Example,
spilling water in an electronic device.
• There are many screws used with a computer system
• A single screw left in a case can short out, and ruin a
computer or cause a fire.
• Metallic jewelry can cause a short, burning you and/or
ruining electronics
• Liquids cause shorts, ruining electronics and causing an
electrical hazard. Never spray anything onto a computer
Cleaning the Outside
• NEVER spray a liquid onto any electrical
component, even if it is unplugged
• Spray a mild detergent/water mix onto a
clean rag, and gently wipe off any dust or
smudges, making sure no liquid gets into
the device
(ESD)Electro-Static Discharge Kills!
• Wear an anti-static wristband
when touching any PC
component
• Keep sensitive parts inside an
anti-static bag.
• The symbol for static sensitive
parts
HANDLING PARTS
Always handle computer parts with care
• Do not touch the gold
connectors or the chips
• Hold parts by the edges
like a photo
Thermal Hazards
• Thermal hazard refers
to components that get
hot enough to burn you.
• If you see a heat sink or
heat spreader, it means
the component gets hot.
• Allow a system to cool
off before servicing.
Thermal Hazards
• We use DUST REMOVER to clean
the inside of a PC.
• The liquid can burn skin (frostbite)
• NEVER touch DUST REMOVER
unless instructed to do so
• Always keep the can upright, and use
short bursts, to prevent liquid spraying
out
• The liquid can damage components
• Huffing DUST REMOVER can cause
cardiac arrest
Physical Hazards
• Arrange your work area to eliminate physical
hazards.
• Don’t leave wires or components on the floor where
you or someone else might trip over them.
• Always secure wires when carrying a device, so you
do not trip over the wires or get them caught on
something which may cause you to drop the device.
• Always lift with your legs, not your back. Some
components are very heavy. Use a cart or ask
someone for help.
• Be aware of cut hazards in the IT workplace.
• Be aware of laser hazards in the IT workplace.
Cut Hazards
• Tools of all kinds
can be a potential
cut hazard. Use
caution and know
the proper use of all
tools.
• If you get cut, tell
the instructor
immediately
Sharp Edges
• Innocent looking
edges inside a case can
be as sharp as a razor
blade.
• Higher priced cases
round the edges to
remove the sharpness
• If you get cut, tell the
instructor immediately
Lasers
• A laser produces a concentrated beam
of light.
• Lasers are found in many
components, such as laser printers,
optical drives (CD/DVD), laser
pointers, laser mice, and fiber
optics.
• A laser can cause eye damage or
blindness, never look into a laser or
fiber optic cable.
• The symbol that warns that a device
contains a laser is
Fire Extinguishers
• Fire Extinguisher Ratings
• Multi-Rating Fire Extinguishers
• Using a Fire Extinguisher
MSDS
Material Safety Data Sheet
• Any component that presents a
potential hazard comes with its
own MSDS.
• The MSDS describes safe
handling procedures for
hazardous materials.
• The MSDS also explains
proper disposal of the material.
For example, an alkaline
battery can be disposed of in
the trash, a Ni-Cad battery
cannot.
Reporting Hazardous Situations or
Accidents
• If you come across something you consider
hazardous, notify a supervisor immediately.
• If someone is injured, no matter how minor, inform
a supervisor immediately.
• If blood is present, try to secure the area so it is not
touched or tracked around, and notify a supervisor
immediately.
• DO NOT clean blood yourself. Blood is
considered hazardous waste, and must be dealt
with properly.
OSHA
• The Occupational Safety and Health
Administration (OSHA) is the main federal
agency charged with the enforcement of
safety and health legislation.