Safety Overview Take notes You will be tested

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SafetyOverviewTake notesYou will be tested
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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?

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Safety Topics

• Personal Safety
• Power Hazards
• Power Supply Hazards
• CRT Monitor Hazards
• Thermal Hazards
• Physical Hazards
• Lifting Hazards
• Fire Extinguishers
• MSDS
• Report Hazardous Situations and Accidents

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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.

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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.

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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.

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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.

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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

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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.

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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

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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

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High Voltage ComponentsThree 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

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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

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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

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(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

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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

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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.

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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

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Physical Hazards

• Arrange your work area to eliminate physical
  hazards.
• Dont 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.

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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

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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

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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

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Fire Extinguishers

• Fire Extinguisher Ratings
• Multi-Rating Fire Extinguishers
• Using a Fire Extinguisher

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MSDSMaterial 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.

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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.

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OSHA

• The Occupational Safety and Health Administration
  (OSHA) is the main federal agency charged with
  the enforcement of safety and health legislation.