Chapter 1: Safe Lab Procedures and Tool Use IT Essentials 5.0 Christle Mae A. Libag Instructor Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 1 Chapter 1 Objectives 2.1 Identify safe Laboratory working condition & Procedures. 2.2 Describe the best method to clean the following components. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 2 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 Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 3 Safety guidelines in the workplace helps to: Protect individuals from accidents and injury. Protect equipment from damage. Protect the environment from contamination. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 4 General Safety Guidelines Do’s and Don’ts Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 5 Guidelines 1) Remove your watch or any other jewelry and secure loose clothing. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 6 2) Turn off the power and unplug equipment before opening the case and performing service. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 7 3) Cover any sharp edges inside the computer case with tape. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 8 4) Never open a power supply or a monitor. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 9 5) Do not touch areas in printers that are hot or use high voltage. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 10 6) Know where the fire extinguisher is located and how to use it. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 11 7) Know where the first aid kit is located. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 12 8) Keep food and drinks out of your workspace. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 13 9) Keep your workspace clean and free of clutter. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 14 10) Lift heavy objects with your legs to avoid back injury. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 15 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. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 16 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. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 17 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. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 18 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. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 19 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. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 20 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. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 21 Safety Procedures to Protect Equipment from Damage and Data Loss Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 22 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. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 23 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. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 24 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) Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 25 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. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 26 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 Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 27 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 Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 28 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. Presentation_ID © 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential 29