05. Power Supply Unit (PSU)

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Power Unit (Power Supply Unit, PSU, PU) පරිගණක දෘඩාංග

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05. Power Supply Unit (PSU)

  1. 1. Copyright © 2007 Heathkit Company, Inc. All Rights Reserved PC Fundamentals Power Supply Unit + more
  2. 2. 2 Power Supply Unit AKA: PSU Power Supply Power Unit
  3. 3. 3 Power Supply Types  Linear Power Supply  Switched-Mode Power Supply (SMPS) o More: o http://en.wikipedia.org/wiki/Switched-mode_power_supply  Pros. Cons. and Comparison o http://en.wikipedia.org/wiki/Switched- mode_power_supply#Advantages_and_disadvantages
  4. 4. 4 The Power Supply.
  5. 5. 5 The Power Supply FAN AC Receptacle On/Off Switch
  6. 6. 6 Power Supply Input Voltage  100 to 125 VAC @ 60 Hz  200 to 250VAC @ 50 Hz
  7. 7. 7 Motherboard Form Factors AT-Type ATX-Type
  8. 8. 8 AT Motherboard 12” 13.5”
  9. 9. 9 ATX Motherboard 9.6 ” 12 ”
  10. 10. 10 ATX Mother- board
  11. 11. AT Power Distribution
  12. 12. 12 Power Supply Output Voltages AT-Type +5 Volts +12 Volts –12 Volts –5 Volts
  13. 13. 13 Power Connector
  14. 14. 14 P9P8 Black Wires Motherboard Power Connectors
  15. 15. Some connectors are held in place by a latch. Latch
  16. 16. 16 P9 Ground Ground +5V +5V +5V-5V
  17. 17. 17 P8 -12V+12V Ground Ground+5V Power Good
  18. 18. ATX Power Distribution
  19. 19. 19 Power Supply Output Voltages ATX-Type +5 Volts +12 Volts –12 Volts –5 Volts +3.3 Volts
  20. 20. 20 ATX Motherboard Power Connector
  21. 21. 21 20-Pin Power Connector
  22. 22. 22 24-Pin Power Connector
  23. 23. 23 2 X 10 ATX Connector 2 X 2 Connector
  24. 24. 24
  25. 25. Edge View of Motherboard.
  26. 26. 26 A Second 2 X 2 Motherboard Power Connector Supplies Processor Core Power (+12 Volts)
  27. 27. 27
  28. 28. 28
  29. 29. 29 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.
  30. 30. Large Molex Connector
  31. 31. 31 +5V +12V Ground 4-Pin Molex Connector
  32. 32. Berg Connector
  33. 33. 33 +5V +12V Ground 4-Pin Berg Connector
  34. 34. 34 Grasp the connector by the shell… Never by the leads.
  35. 35. 35 Power Management  Hardware Power Management  Software Power Management
  36. 36. 36 Advanced Power Management (APM)  Eenables the operating system to work with the BIOS to achieve power management.  Replaced by ACPI  Microsoft dropped support for APM in Windows Vista More: http://en.wikipedia.org/wiki/Advanced_power_management
  37. 37. 37 Advanced Configuration and Power Interface (ACPI)  Successor of APM  An open standard for device configuration and power management by the operating system  ACPI defines platform-independent interfaces for hardware discovery, configuration, power management and monitoring.  The specification is central to Operating System-directed configuration and Power Management (OSPM), a system implementing ACPI, which removes device management responsibilities from legacy firmware interfaces
  38. 38. 38 APM vs. ACPI  APM vs. ACPI –http://www.thinkwiki.org/wiki/APM_vs._ACPI  Difference Between APM and ACPI – ACPIhttp://www.differencebetween.net/technology/software- technology/difference-between-apm-and-acpi/ ACPI http://en.wikipedia.org/wiki/Advanced_Configuration_and_ Power_Interface
  39. 39. 39 Power Saving Modes  Blank (Black) Screen Saver  Display Off Sleep  Hibernate Power States http://en.wikipedia.org/wiki/Advanced_Configuration_and_ Power_Interface#Power_states Hybrid Sleep
  40. 40. 40  Blank Screen Saver
  41. 41. 41  Display Off and Sleep
  42. 42. 42 Hybrid Sleep – http://en.wikipedia.org/wiki/Sleep_mode#Hybrid_sleep – Sleep and Hibernation: FAQ  http://windows.microsoft.com/en-sg/windows7/sleep- and-hibernation-frequently-asked-questions Sleep (AKA: Stand By, Suspend)
  43. 43. 43 Replacing the Power Supply
  44. 44. 44 Disconnect the AC Power Cord.
  45. 45. 45 On-Off Switch
  46. 46. 46
  47. 47. 47 Power to Motherboard
  48. 48. 48 The Power Supply is held in place by four screws.
  49. 49. 49 Power Supply
  50. 50. 50 Reinstall the power supply.
  51. 51. 51 Links and References  www.google.lk o https://www.google.com/search?q=Power+Supply+Unit  www.duckduckgo.com o https://duckduckgo.com/?q=Computer+Power+Supply  www.wikipedia.org o http://en.wikipedia.org/wiki/Power_supply_unit_(computer)
  52. 52. Copyright © 2007 Heathkit Company, Inc. All Rights Reserved PC Fundamentals End

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