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Presentation 2 – The Power Supply

Presentation 2 – The Power Supply. Objectives. At the end of this presentation, you will be able to:. Identify the input and output voltages of the power supply. Demonstrate the proper method to measure the DC output voltages of the power supply.

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Presentation 2 – The Power Supply

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  1. Presentation 2 – The Power Supply

  2. Objectives At the end of this presentation, you will be able to:

  3. Identify the input and output voltages of the power supply. • Demonstrate the proper method to measure the DC output voltages of the power supply. • Explain how power is distributed throughout the computer. • Demonstrate the proper method to remove and replace the power supply in the computer. • Compute the power consumption of the PC.

  4. intel pentium II The Power Supply.

  5. The Power Supply AC Receptacle FAN On/Off Switch

  6. Power Supply Input Voltage • 100 to 125 VAC @ 60 Hz • 200 to 250VAC @ 50 Hz

  7. Motherboard Form Factors • AT-Type • ATX-Type

  8. AT Motherboard 13.5” 12”

  9. 9.6 ” intel pentium II ATX Motherboard 12 ”

  10. ATX Mother-board

  11. ATX Power Distribution

  12. Power Supply Output VoltagesATX-Type • +5 Volts • +12 Volts • -12 Volts • -5 Volts • +3.3 Volts

  13. ATX Motherboard Power Connector

  14. 20-Pin Power Connector

  15. 24-Pin Power Connector

  16. 2 X 2 Connector 2 X 10 ATX Connector

  17. Edge View of Motherboard.

  18. A Second 2 X 2 Motherboard Power Connector Supplies Processor Core Power (+12 Volts)

  19. AT Power Distribution

  20. Power Supply Output VoltagesAT-Type • +5 Volts • +12 Volts • -12 Volts • -5 Volts

  21. Power Connector

  22. Motherboard Power Connectors Black Wires P8 P9

  23. Some connectors are held in place by a latch. Latch

  24. +5V -5V +5V Ground +5V Ground P9

  25. -12V +12V +5V Ground Power Good Ground P8

  26. The Power Good Signal • +5 Volt signal generated by the power supply. • It indicates that the power supply has passed its self test and that its output voltages have stabilized. • Usually occurs within first 0.5 seconds. • Prevents the system from running under bad or unstable power conditions.

  27. Large Molex Connector

  28. 4-Pin Molex Connector +12V Ground +5V

  29. Berg Connector

  30. 4-Pin Berg Connector +12V Ground +5V

  31. Grasp the connector by the shell… Never by the leads.

  32. Replacing the Power Supply

  33. Disconnect the AC Power Cord.

  34. On-Off Switch

  35. Power to Motherboard

  36. The Power Supply is held in place by four screws.

  37. Power Supply

  38. Reinstall the power supply.

  39. End

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