CH10 - Dial Test AC DC 6 Essentials Protecting the PC...

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All-in-One CompTIA A+ Certification Exam Guide (Exams 220-701 & 220-702) – Mike Meyers Seventh Edition Chapter 10 Power Supplies
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2 Chapter Objectives In this chapter, you will: • Explain the basics of electricity • Describe the details about powering the PC • Install, maintain, and troubleshoot power supplies
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3 Power supplies • Power supply – Converts A/C to D/C – Very important piece of PC – Problems with power supply • Instability • Data loss • Crashes • Fries components
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4 Historical/Conceptual – Understanding Electricity • Electricity – Sent via pressure • Voltage (volts) • Current (amps) • Wattage (watts) • V × A = W • Resistance (ohms) – Circuit breakers/ground wires (fuses)
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5 Essentials • Multimeter – Also known as volt-ohm meter – Two probes – Analog/digital meter
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Unformatted text preview: Dial Test AC DC 6 Essentials Protecting the PC Spikes Sags Use surge suppressors Use UPS Unplug during electrical storms 7 Essentials Power to PC 20 or 24 pin for motherboard May need 4, 6, 8 pin as well Power to peripherals Molex Mini SATA 8 Essentials Wattage requirements Different for each PC Total wattage = minimum requirements Power supply fan Helps keep things cool Some can be adjusted 9 Essentials Power supply death Sudden Just dont start Make sure good electrical outlet/power cable Test power supply Check any power switches 10 Essentials Power supply death (cont) Slow Key word is intermittent Have power supplies on hand for testing...
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CH10 - Dial Test AC DC 6 Essentials Protecting the PC...

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