Chapter 1: Safe
Lab Procedures
and Tool Use
IT Essentials 5.0
Christle Mae A. Libag
Instructor
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Chapter 1 Objectives
 2.1 Identify safe Laboratory
working condition &
Procedures.
 2.2 Describe the best
method to clean the
following components.
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Characteristics of a Safe Workplace
 Clean, organized, and properly lit workspace
 Proper procedures for handling equipment
 Proper disposal or recycling of components
containing hazardous materials
 Safety guidelines
•Most companies require reporting any injuries,
including description of safety procedures not
followed.
•Damage to equipment may result in claims for
damages from the customer.
•Types of safety guidelines: General, Electrical, Fire
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Safety guidelines in the workplace helps
to:
 Protect individuals from accidents and injury.
 Protect equipment from damage.
 Protect the environment from contamination.
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General Safety Guidelines
Do’s
and
Don’ts
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Guidelines
1) Remove your watch or any other jewelry and
secure loose clothing.
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2) Turn off the power and unplug equipment before
opening the case and performing service.
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3) Cover any sharp edges inside the computer case
with tape.
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4) Never open a power supply or a monitor.
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5) Do not touch areas in printers that are hot or use
high voltage.
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6) Know where the fire extinguisher is located and
how to use it.
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7) Know where the first aid kit is located.
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8) Keep food and drinks out of your workspace.
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9) Keep your workspace clean and free of clutter.
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10) Lift heavy objects with your legs to avoid back
injury.
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PROPER WAY ON CLEANING THE COMPONENTS OF A COMPUTER
1. Mouse
 Use glass cleaner and a soft cloth to clean the outside
of the mouse.
 Do not spray glass cleaner directly on the mouse.
 If cleaning a ball mouse, the ball can be removed and
cleaned with glass cleaner and a soft cloth.
 Wipe the rollers clean inside the mouse with the same
cloth. Do not spray any liquids inside the mouse.
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2. Contacts on a PCI expansion card
 Clean the contacts on components with isopropyl
alcohol.
Note that you should use the 90% or higher solution of
isopropyl alcohol because some solutions in the 70-80% range
contain too high a concentration of water to be effective.
 Do not use rubbing alcohol.
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3. Removing dust and dirt from inside the computer
 Use compressed air or a non-electrostatic vacuum to
clean out the dust from the vents, the fan behind the
vent and on the motherboard, and the heat sink and
CPU heat sink.
 Use tweezers to remove any debris.
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4. Keyboard
 Blow compressed air between the keys. Wipe the
keyboard with a soft, lint-free cloth lightly moistened
with water or computer-screen cleaner.
5. LCD monitor
 Wipe display with a soft, lint-free cloth lightly moistened
with water or LCD cleaner.You should never use glass
cleaner or any type of solvent.
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6. CRT monitor
 Dampen a soft, clean, lint-free cloth with distilled water
and wipe the screen from top to bottom. Do not spray
the glass cleaner directly onto the display.
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What can happen if a computer has an
excess buildup of dirt and dust?
Dirt can cause problems with the physical operation of
fans, buttons, and other mechanical components. On
electrical components, an excessive buildup of dust will
act like an insulator and trap the heat. This insulation will
impair the ability of heatsinks and heatpipes to keep
components cool, causing chips and circuits to overheat
and fail.
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Safety Procedures to Protect
Equipment from Damage and
Data Loss
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Types of Interference
 Electrostatic Discharge (ESD)
•Buildup of an electric charge resting on a surface
•30 volts of static electricity can damage a computer
component.
 Electromagnetic Interference (EMI)
•Intrusion of outside electromagnetic signals in a
transmission media, such as copper cabling
•Sources can be: Man-made, natural events,
climate or any source designed to generate
electromagnetic energy.
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ESD Protection Recommendations
ESD can cause permanent damage to electrical components.
Follow these recommendations
to help prevent ESD damage:
■ Keep all components in antistatic bags until you
are ready to install them.
■ Use grounded mats on workbenches and on the
work area floor.
■ Use antistatic wrist straps when working on
computers.
■ Avoid working on carpeted areas if possible.
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Types of Interference (cont)
 Power Fluctuation
•Voltage in a computer that is not accurate or steady
•Blackouts, brownouts, noise, spikes, power surges
• Power Protection Devices
•Surge suppressor
•Uninterruptible Power Supply (UPS)
•Standby Power Supply (SPS)
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Procedures to Protect the Environment
 Computers and peripherals contain materials that
can be harmful to the environment.
 Protect the environment by responsibly disposing and
recycling:
• Material Safety Data Sheet (MSDS): Fact sheet summarizing
information about material identification, including hazardous
ingredients that can affect personal health, fire hazards, and
first aid requirements.
• Proper Disposal: Comply with policies that specify the
procedures for disposing different materials such as batteries,
monitors and used printer kits.
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Specialized Tools
Skilled use of tools and software makes the
job less difficult and ensures that tasks
are performed properly and safely.
 Hardware Tools
•ESD Tools
•Hand Tools
•Cleaning Tools
•Diagnostic Tools
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Software Tools
Disk Management Tools
Protection Software Tools
 FDISK
• Windows 7 Security Center
 Format
• Antivirus program
 Scandisk or CHKDSK
• Antispyware program
 Defrag
• Window 7 Firewall program
 Disk Cleanup
Organizational Tools
 Disk Management
• Notes
 System File Checker (SFC)
• Journal
• History of repairs
• Internet Reference
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Proper Tool Use
 Safety in the workplace is everyone's responsibility.
 Before cleaning or repairing equipment, check to
make sure that tools are in good condition.
• Proper use of an antistatic wrist strap can prevent ESD
damage to computer components.
CAUTION: Never wear an antistatic wrist strap if you are
repairing a monitor or CRT.
• Proper use of an antistatic mat transfers static electricity
away from equipment to a grounding point.
• Proper use of hand tools.
• Proper Use of Cleaning Materials.
CAUTION: Before cleaning any device, turn it off and
unplug the device from the power source.
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