1 Chapter 2 Safe Lab Procedures & Tool Use PC Support & RepairChapter 2Safe Lab Procedures & Tool Use
2 ObjectivesAfter 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 WorkplacePrevents personal injuryKeeps equipment safe
4 General Safety Keep fire extinguisher & first aid kit handy Watch cable tripping hazardWhere would you place cables to prevent this?
5 Electrical Safety HIGH VOLTAGE Printer parts can become HOT Power suppliesMonitorsShould be replaced, not repairedDO NOT wear antistatic wrist strap if you repair thesePrinter parts can become HOTLet cool downDon’t mix AC adapters for laptopsMight 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 surfaceBuildup can JUMP to a componentElectrostatic dischargeAnything you do can cause static3000v for you to feel itWalk across carpet & touch someone10,000v!!!LESS THAN 30V CAN DAMAGE PC COMPONENTS
8 Protect Against ESD Keep components in antistatic Use grounded mats on workbenchesUse grounded floor mats in work areasUse antistatic wrist straps when working on computers
9 EMI & RFIEMIOutside electrical signals interfere with media (wire)Distorts the normal signalEx: Cell phone rings next to PCPower lines, motors, lightning stormsRFICordless phone or microwave oven messes up Wi-Fi
11 Power Protection Devices Surge SuppressorDiverts extra power to the groundUPSBattery rechargingAllows shutdown time when no powerNO PRINTER IN UPSSPS (Standby Power Supply)Backup battery supplies power to shut downToo much switching time
12 Hazardous Materials Heavy metals such as cadmium, lead, or mercury Follow regulations for recycle or removalLook up your town’s policy
14 Disposal Batteries Monitors Toner & Ink Lead, cadmium, lithium, alkaline manganese, and mercury DO NOT DECAYRecycle Li-ion, Ni-Cd, Ni-Mh, and lead-acidMonitorsGlass, metal, plastic, leadRecycleToner & InkRecycle or refillCleaning chemicals or Cans of airNot down sink/drain
15 Review What items are hazardous & need to be disposed of specially? Batteries, monitors, tonerBefore you work on a PC, you should…turn off & unplug itTo reduce a chance if ESD, you should use mats on two places. Where?Desk & floor
16 ReviewWhere should you store parts, like hard drives & NICs when not in a computer?Antistatic bagWhat can cause EMI?MotorsT or F. Before you work on a monitor, you should clip the antistatic strap to the desk.FalseWhat document describes chemical ingredients & spill cleanup process?MSDS
17 Hardware Tools Keep these tools in your handy-dandy toolkit ESD tools Hand toolsCleaning toolsDiagnostic tools
18 ESD Tools Antistatic wrist strap Antistatic mat Protects when grounded to a computer chassisAntistatic matProtects by preventing static electricity from accumulating on the hardware or on the technician
19 Identify Hand Tools Flat head screwdriver Phillips head screwdriver Torx screwdriverHex driverNeedle-nose pliersWire cuttersTweezersPart retrieverFlashlight
22 Disk Management ToolsFdisk or Disk Management – Creates and deletes partitions on HDFormat – Erases allScandisk 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 errorsDefrag – Optimizes space on HD to allow faster access to dataDisk Cleanup – Clears space on a hard driveSystem File Checker (SFC) – Scans OS critical files and replaces any files that are corrupted
24 Protection SoftwareWindows 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 notesJournal all activitiesRepair logUse the Internet for help
26 ReviewWhat process moves parts of files closer together on a hard drive?DefragWhat process will clean up temporary files you got from going on the Internet?Disk cleanupDefine a brownout.Reduced voltage for a period of timeWhat tool can measure voltage or check a cable’s continuity?Multimeter
27 Review Which screwdriver has a straight end? FlatheadWhich XP CLI utility scans for corrupted OS files & replaces them?System file checkerWhat 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 computersHow can you tell if one is?
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