Power Supply

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Author:
shadrinaff
ID:
8936
Filename:
Power Supply
Updated:
2010-03-03 01:52:17
Tags:
CompTIA power supply study guide
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Description:
Power supply and connectors for PC A+ certs
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  1. what are the four parts of electricity:
    • Watts - work or amount of power - 250watts
    • Amps- Flow (will kill you) higher the amp rating the more dangerous
    • Volts- Pressue (USA uses 110-115v
    • Ohms- resistance (impedance)
  2. Main Connectors
    • P8/P9- AT older no power switch on back
    • P1/P4- ATX has on/off switch can go into sleep mode
  3. Install process for P8/P9
    Must go into an AT socket which is a single row and black wires must face each other and chips face out
  4. Install process for ATX and ATX 12v 2.0
    • Must go in ATX socket which is 20-24 pin double row
    • Goes only one way
    • Some PS also have added P4 12V 6pin AUX 3.3v and 5v and PCIe 6pin connectors
  5. what does the mini (Berg) connector supply power to?
    floppy drive
  6. the Molex power connectors connects everything else or at least 15 devices name those:
    • 1. CD ROM, R, RW
    • 2. DVD ROM, HD, Blu Ray, R and RW
    • 3. Super Drives
    • 4. Hard Drive
    • 5. Zip Drives
    • 6. Internal hard drive
    • 7. Tape drives
    • 8.SCSI devices
    • 9. Cooling Fans
    • 10. Video Cards
  7. what are 3 Wire colors and what do they represent
    • Yellow - +12V
    • Black- Ground
    • Red- +5V
  8. describe the sata 15 pin connector
    black long and flat connects SATA hard drives newer device
  9. Name Trouble shooting steps for Power supply
    • 1. Plugged In
    • 2. Check Connection
    • 3. Is it turned on
    • 4. check AC outlet
    • 5. check surge protector
    • 6. check UPS
    • 7. Check on/off switch on back of PC
    • 8. check front panel connectors
    • 9. check correct voltage
    • 10. check motherboard power sockets
    • 11. check for weird noises
    • 12. check for dusty
    • 13. check for erractic behavior and long shut downs
  10. what are 3 devices to check power supply
    multimeter, volt meter, or power tester

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