Rosewill Computer Case 422 Technical Information Seite 8
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vii
Contents
Electrical Fires ............................................................................................................................ 161
Computer Disposal/Recycling ................................................................................................. 162
Soft Skills—Written Communications Skills ...................................................................... 162
Chapter Summary ...................................................................................................................... 164
Key Terms .................................................................................................................................... 165
Review Questions ....................................................................................................................... 165
Exercises ....................................................................................................................................... 168
Lab 4.1 Performing Maintenance on an Antistatic Wrist Strap ...................... 168
Lab 4.2 Computer Disassembly/Reassembly ........................................................ 169
Lab 4.3 Amps and Wattage ....................................................................................... 172
Lab 4.4 Continuity Check ......................................................................................... 172
Lab 4.5 Pin-Out Diagramming ................................................................................ 173
Lab 4.6 Fuse Check .................................................................................................... 174
Lab 4.7 Using a Multimeter ..................................................................................... 174
Lab 4.8 Wall Outlet and Power Cord AC Voltage Check ................................... 176
Lab 4.9 Device DC Voltage Check .......................................................................... 177
Lab 4.10 Windows XP Power Options ................................................................... 178
Lab 4.11 Windows Vista/7 Power Options ............................................................ 179
Activities ....................................................................................................................................... 180
Chapter 5: Logical Troubleshooting ........................................................................................183
Troubleshooting Overview ....................................................................................................... 184
Identify the Problem .................................................................................................................. 184
Establish a Theory of Probable Cause ................................................................................... 185
Test the Theory to Determine Cause .................................................................................... 190
Establish a Plan of Action and Implement the Solution .................................................. 191
Verify Full System Functionality and Implement Preventive Measures ....................... 191
Soft Skills—Document Findings, Actions, and Outcomes and
Provide Feedback ........................................................................................................................ 192
Chapter Summary ...................................................................................................................... 194
Key Terms .................................................................................................................................... 194
Review Questions ....................................................................................................................... 194
Exercises ....................................................................................................................................... 196
Lab 5.1 Logical Troubleshooting ................................................................... 196
Activities ....................................................................................................................................... 197
Chapter 6: Memory ............................................................................................................................201
Memory Overview ....................................................................................................................... 202
Memory Physical Packaging .................................................................................................... 203
Planning the Memory Installation ......................................................................................... 204
Planning the Memory Installation—Memory Technologies............................................ 205
Mobile Device Memory .............................................................................................................. 207
Planning the Memory Installation—Memory Features .................................................... 207
Planning for Memory—The Amount of Memory to Install ............................................. 209
Planning for Memory—How Many of Each Memory Type?............................................. 212
Planning for Memory—Researching and Buying Memory .............................................. 216
- Guide to PCs 2
- Complete CompTIA 3
- Contents at a Glance 4
- Contents 10
- Contents 11
- About the Author 19
- Dedication 20
- Acknowledgments 20
- We Want to Hear from You! 21
- Reader Services 21
- It Pays to Get Certified 22
- CompTIA Career Pathway 23
- Steps to Certication 23
- Content Seal of Quality 24
- Why CompTIA? 24
- Introduction 25
- Organization of the Text 26
- Features of This Book 27
- IT work 31
- CompTIA A+ Exam Objectives 32
- CompTIA Exam Objectives 33
- Disassembly 36
- Disassembly Overview 37
- Electrostatic Discharge (ESD) 37
- Opening the Case 41
- Cables and Connectors 41
- Snug connections 43
- Storage Devices 45
- Motherboards 46
- Mobile Device Issues 47
- Reassembly 49
- Preventive Maintenance 49
- Basic Electronics Overview 51
- Electronics Terms 51
- Good connection Broken wire 53
- Power Supply Overview 54
- Power Supply Form Factors 55
- Tech Tip 56
- Purposes of a Power Supply 58
- Power Supply Voltages 60
- Mobile Device Power 61
- Keep Li-ion batteries cool 63
- Power Interface) 64
- Windows power management 65
- Watch the wattage 68
- Solving Power Supply Problems 70
- Adverse Power Conditions 71
- Adverse Power Protection 72
- Surge Protectors 72
- Line Conditioners 74
- Figure 4.32 Line conditioner 75
- Figure 4.33 Sine wave and 75
- Standby Power Supply (SPS) 77
- Electrical Fires 78
- Computer Disposal/Recycling 79
- Chapter Summary 81
- Review Questions 82
- Exercises 85
- External Cables 86
- Computer Case Removal 86
- Adapter Placement 86
- Motherboard 88
- Lab 4.3 Amps and Wattage 89
- Lab 4.4 Continuity Check 89
- Lab 4.5 Pin-Out Diagramming 90
- Lab 4.6 Fuse Check 91
- Lab 4.7 Using a Multimeter 91
- Figure 4.38 AC outlet 93
- GND to hot 120VAC 93
- GND to neutral 0VAC 93
- Hot to neutral 120VAC 93
- +5 volts 95
- +12 volts 95
- Activities 97
- Critical Thinking Skills 99
- A+ Certification Exam Tips 99
- Complete PC Restore tool 107
- FireWire 114
- IRQs (Interrupt Requests) 120
- PBs (petabytes) 129
- Setup program 136
- SSDs (solid state drives) 138
- SSDs (solid state drives) 139
- TBs (terabytes) 140
- troubleshooting 143
- video 145
- Windows 147
- Windows Vista 148
- Windows Vista 149
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