ITE_50_Chapter2.ppt
- 1. Chapter 2: Safe Lab Procedures and Tools Used, Preventive Maintenance
- 2. Safe Lab Procedures and Tool Use Why the workplace should have safety guidelines to follow to: Protect people from injury Protect equipment from damage Protect the environment from contamination
- 3. Safe Working Environment Some things to look for: Clean, organized, and properly lit workspace Proper procedures for handling equipment Proper disposal or recycling of components containing hazardous materials
- 4. General Safety Guidelines Most companies require reporting any injuries, including description of safety procedures not followed. CAUTIONS: Power supplies and monitors contain very high voltage. Do not wear the antistatic wrist strap when repairing power supplies or monitors. Some printer parts may become very hot when in use and other parts may contain very high voltages. So take care
- 5. Fire Safety Guidelines Know the location of fire extinguishers, how to use them, and which to use for electrical fires and for combustible fires Have an escape route in case a fire gets out of control Know how to contact emergency services quickly Keep the workspace clean Keep most solvents in a separate area Have a fire plan before you begin work:
- 6. Electrostatic Discharge (ESD) Static electricity is the buildup of an electric charge resting on a surface. This buildup may destroy a component and cause damage. EXAMPLES: walking on a rug, rubbing a plastic comb against dry hair, rubbing a balloon against a sweater, ascending from a fabric car seat, or removing some types of plastic packaging. At least 3,000 volts of static electricity must build up before a person can feel ESD, but less than 30 volts of static electricity can damage a computer component.
- 7. Types of Interference 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.
- 8. Preventing ESD Damage Use antistatic bags to store components Use grounded mats on workbenches Use grounded floor mats in work areas Use antistatic wrist straps when working on computers
- 9. Power Fluctuation AC power fluctuations can cause data loss or hardware failure: Blackouts, brownouts, noise, spikes, power surges To help shield against power fluctuation issues, use power protection devices to protect the data and computer equipment: Surge suppressors UPS CAUTION: Never plug a printer into a UPS device. UPS manufacturers suggest not plugging a printer into a UPS for fear of
- 10. Hardware Tools used Skilled use of tools and software makes the job less difficult and ensures that tasks are performed properly and safely. ESD Tools ◦ antistatic wrist strap, mat Hand Tools ◦ screwdrivers, needle-nose pliers, Cleaning Tools ◦ soft cloth, compressed air can, blowers Diagnostic Tools ◦ digital multimeter, loopback adapter
- 11. Software Tools Fdisk - create and delete disk partitions Format - prepare a hard drive prior to use Scandisk or Chkdsk - check for physical errors on the disk surface Defrag - optimize use of space on a disk Disk Cleanup - remove unused files Disk Management - creates partitions and formats disks (GUI interface) System File Checker (SFC) – scans the operating system critical files and replaces any files that are corrupt Disk management tools
- 12. Software Tools Cont… Protection Software Tools • Windows 7 Security Center • Antivirus program • Antispyware program • Window 7 Firewall program Organizational Tools •Notes •Journal •History of repairs •Internet Reference
- 13. Proper Use of Antistatic Mat Lay the computer on the mat. Connect the computer to the mat with the cable. Connect the mat to a reliable electrical ground with its cable. Now, you and the computer are at ground potential.
- 14. Proper Use of Hand Tools Use the proper type and size of screwdriver by matching it to the screw. ◦ Phillips, Flat Head and Hex are the most common types. Cautions: If excessive force is needed to remove or add a component, something may be wrong. (Do not over tighten screws) Magnetized tools should not be used around electronic devices. Pencils should not be used inside the computer because the pencil lead can act as a conductor and may damage the computer components.
- 15. Proper Use of Cleaning Materials To clean computers and accessories: Use mild cleaning solution and lint-free cloth to clean computer cases, outside of monitor, LCD screen, CRT screen, and mouse. Use compressed air to clean heat sinks. Use Isopropyl alcohol and lint-free swabs to clean RAM. Use hand-held vacuum cleaner with a brush attachment to clean a keyboard. CAUTION: Before cleaning any device, turn it off and unplug the device from the power
- 16. Preventive Maintenance Purpose: Reduce the likelihood of hardware or software problems by systematically and periodically checking hardware and software to ensure proper operation. Reduce computer down time and repair costs.
- 17. Hardware Maintenance Make sure that the hardware is operating properly. Check the condition of parts. Repair or replace worn parts. Keep components clean. Create a hardware maintenance program.
- 18. Software Maintenance Review updates Create a schedule
- 19. Preventive Maintenance Benefits Reduce computer down time. Reduce repair costs. Reduce loss of worker productivity.
- 20. Chapter 2 Summary Work in a safe manner to protect both users and equipment. Follow all safety guidelines to prevent injuries to yourself and to others. Know how to protect equipment from ESD damage. Know about, and be able to prevent, power issues that can cause equipment damage or data loss.
- 21. Chapter 2 Summary Know which products and supplies require special disposal procedures. Be familiar with MSDS sheets for both safety issues and disposal restrictions to help protect the environment. Be able to use the correct tools for the task. Know how to clean components safely. Use organizational tools during computer repairs.