1. Chapter 2 Safe Lab Procedures & Tool Use
PC Support & Repair
Chapter 2
Safe Lab Procedures & Tool Use

2. Objectives
After completing this chapter, you will meet these objectives:
Explain the purpose of safe working conditions and procedures.
Identify tools and software used with personal computer components and their purposes.
Implement proper tool use.
Identify safety procedures and potential hazards for users and technicians.
Identify safety procedures to protect equipment from damage and data from loss.
Identify safety procedures to protect the environment from contamination.
This chapter covers basic safety practices for the workplace, hardware and software tools, and the disposal of hazardous materials. Safety guidelines help protect individuals from accidents and injury and protect equipment from damage. Some of these guidelines are designed to protect the environment from contamination by discarded materials. Stay alert to situations that could result in injury or damage to equipment. Warning signs are designed to alert you to danger. Always watch for these signs and take the appropriate action according to the warning given.

3. Safe Workplace
Prevents personal injury
Keeps equipment safe

4. General Safety Keep fire extinguisher & first aid kit handy
Watch cable tripping hazard
Where would you place cables to prevent this?

5. Electrical Safety HIGH VOLTAGE Printer parts can become HOT
Power supplies
Monitors
Should be replaced, not repaired
DO NOT wear antistatic wrist strap if you repair these
Printer parts can become HOT
Let cool down
Don’t mix AC adapters for laptops
Might have different power requirements

6. Fire Safety TURN OFF PC & UNPLUG b4 u do work
Never fight a fire that is out of control or not contained.
Always have a planned fire escape route before beginning any work.
Get out of the building quickly.
Contact emergency services for help.
Be sure to locate and read the instructions on the fire extinguishers in your workplace before you have to use them.

7. ESD Static electricity Anything you do can cause static
Buildup of charge on surface
Buildup can JUMP to a component
Electrostatic discharge
Anything you do can cause static
3000v for you to feel it
Walk across carpet & touch someone
10,000v!!!
LESS THAN 30V CAN DAMAGE PC COMPONENTS

8. Protect Against ESD Keep components in antistatic
Use grounded mats on workbenches
Use grounded floor mats in work areas
Use antistatic wrist straps when working on computers

9. EMI & RFI
EMI
Outside electrical signals interfere with media (wire)
Distorts the normal signal
Ex: Cell phone rings next to PC
Power lines, motors, lightning storms
RFI
Cordless phone or microwave oven messes up Wi-Fi

10. Power Issues

11. Power Protection Devices
Surge Suppressor
Diverts extra power to the ground
UPS
Battery recharging
Allows shutdown time when no power
NO PRINTER IN UPS
SPS (Standby Power Supply)
Backup battery supplies power to shut down
Too much switching time

12. Hazardous Materials Heavy metals such as cadmium, lead, or mercury
Follow regulations for recycle or removal
Look up your town’s policy

13. MSDS
Document summarizes materials, hazards, safety procedures for spills, safety requirements
Sample MSDS

14. Disposal Batteries Monitors Toner & Ink
Lead, cadmium, lithium, alkaline manganese, and mercury DO NOT DECAY
Recycle Li-ion, Ni-Cd, Ni-Mh, and lead-acid
Monitors
Glass, metal, plastic, lead
Recycle
Toner & Ink
Recycle or refill
Cleaning chemicals or Cans of air
Not down sink/drain

15. Review What items are hazardous & need to be disposed of specially?
Batteries, monitors, toner
Before you work on a PC, you should…
turn off & unplug it
To reduce a chance if ESD, you should use mats on two places. Where?
Desk & floor

16. Review
Where should you store parts, like hard drives & NICs when not in a computer?
Antistatic bag
What can cause EMI?
Motors
T or F. Before you work on a monitor, you should clip the antistatic strap to the desk.
False
What document describes chemical ingredients & spill cleanup process?
MSDS

17. Hardware Tools Keep these tools in your handy-dandy toolkit ESD tools
Hand tools
Cleaning tools
Diagnostic tools

18. ESD Tools Antistatic wrist strap Antistatic mat
Protects when grounded to a computer chassis
Antistatic mat
Protects by preventing static electricity from accumulating on the hardware or on the technician

19. Identify Hand Tools Flat head screwdriver Phillips head screwdriver
Torx screwdriver
Hex driver
Needle-nose pliers
Wire cutters
Tweezers
Part retriever
Flashlight

20. Cleaning Tools
Soft cloth
Compressed air
Cable ties
Parts organizer

21. Diagnostic Tools
Multimeter
Loopback adapter

22. Disk Management Tools
Fdisk or Disk Management – Creates and deletes partitions on HD
Format – Erases all
Scandisk or Chkdsk – Checks the integrity of files and folders on a hard drive by scanning the file system. Also checks the disk surface for physical errors
Defrag – Optimizes space on HD to allow faster access to data
Disk Cleanup – Clears space on a hard drive
System File Checker (SFC) – Scans OS critical files and replaces any files that are corrupted

23. Disk Management Tools

24. Protection Software
Windows XP Security Center – Checks the status of essential security settings. Continuously checks to make sure that the software firewall and antivirus programs are running. Ensures that automatic updates are set to download and install automatically.
Antivirus program – Protects against virus attacks.
Spyware remover – Protects against software that sends information about web surfing habits to an attacker.
Firewall program – Runs continuously to protect against unauthorized communications to and from your computer.

25. Organizational Tools Keep repairs documented!
Keep notes
Journal all activities
Repair log
Use the Internet for help

26. Review
What process moves parts of files closer together on a hard drive?
Defrag
What process will clean up temporary files you got from going on the Internet?
Disk cleanup
Define a brownout.
Reduced voltage for a period of time
What tool can measure voltage or check a cable’s continuity?
Multimeter

27. Review Which screwdriver has a straight end?
Flathead
Which XP CLI utility scans for corrupted OS files & replaces them?
System file checker
What is best at removing dust in a PC?
Compressed air

28. Using the Wrist Strap Wrap around wrist Clip to unpainted metal case
DO NOT wear one if repairing a power supply or monitor

29. Using the Mat DO NOT work on PC on carpeted area Lay mat on desk
Clip mat to the case

30. Using Hand Tools What’s a stripped screw Some are magnetized
DO NOT use these around computers
How can you tell if one is?

31. Cleaning

32. Lab
2.3.4
Disassemble computer

33. Review

34. Chapter 2 Safe Lab Procedures & Tool Use
PC Support & Repair
Chapter 2
Safe Lab Procedures & Tool Use