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05. Power Supply Unit (PSU)
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05. Power Supply Unit (PSU)

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

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

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  • 1. Copyright © 2007 Heathkit Company, Inc. All Rights Reserved PC Fundamentals Power Supply Unit + more
  • 2. 2 Power Supply Unit AKA: PSU Power Supply Power Unit
  • 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 The Power Supply.
  • 5. 5 The Power Supply FAN AC Receptacle On/Off Switch
  • 6. 6 Power Supply Input Voltage  100 to 125 VAC @ 60 Hz  200 to 250VAC @ 50 Hz
  • 7. 7 Motherboard Form Factors AT-Type ATX-Type
  • 8. 8 AT Motherboard 12” 13.5”
  • 9. 9 ATX Motherboard 9.6 ” 12 ”
  • 10. 10 ATX Mother- board
  • 11. AT Power Distribution
  • 12. 12 Power Supply Output Voltages AT-Type +5 Volts +12 Volts –12 Volts –5 Volts
  • 13. 13 Power Connector
  • 14. 14 P9P8 Black Wires Motherboard Power Connectors
  • 15. Some connectors are held in place by a latch. Latch
  • 16. 16 P9 Ground Ground +5V +5V +5V-5V
  • 17. 17 P8 -12V+12V Ground Ground+5V Power Good
  • 18. ATX Power Distribution
  • 19. 19 Power Supply Output Voltages ATX-Type +5 Volts +12 Volts –12 Volts –5 Volts +3.3 Volts
  • 20. 20 ATX Motherboard Power Connector
  • 21. 21 20-Pin Power Connector
  • 22. 22 24-Pin Power Connector
  • 23. 23 2 X 10 ATX Connector 2 X 2 Connector
  • 24. 24
  • 25. Edge View of Motherboard.
  • 26. 26 A Second 2 X 2 Motherboard Power Connector Supplies Processor Core Power (+12 Volts)
  • 27. 27
  • 28. 28
  • 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. Large Molex Connector
  • 31. 31 +5V +12V Ground 4-Pin Molex Connector
  • 32. Berg Connector
  • 33. 33 +5V +12V Ground 4-Pin Berg Connector
  • 34. 34 Grasp the connector by the shell… Never by the leads.
  • 35. 35 Power Management  Hardware Power Management  Software Power Management
  • 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 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 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 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  Blank Screen Saver
  • 41. 41  Display Off and Sleep
  • 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 Replacing the Power Supply
  • 44. 44 Disconnect the AC Power Cord.
  • 45. 45 On-Off Switch
  • 46. 46
  • 47. 47 Power to Motherboard
  • 48. 48 The Power Supply is held in place by four screws.
  • 49. 49 Power Supply
  • 50. 50 Reinstall the power supply.
  • 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. Copyright © 2007 Heathkit Company, Inc. All Rights Reserved PC Fundamentals End