Danger
Potentially Dangerous
Injury may result if this procedure is not followed properly. Use caution and follow all warnings.
Danger

Tools Featured in this Teardown

Introduction

The RadioShack 22-510 Switching Power Supply provides AC to DC conversion to mimic a car’s electrical system. This teardown looks at some of the components that make this supply function.

This teardown is not a repair guide. To repair your RadioShack 22-510 Switching Power Supply, use our service manual.

Image 1/2: The entire power supply can be taken apart with a Phillips screwdriver and adjustable wrench. Image 2/2: The entire power supply can be taken apart with a Phillips screwdriver and adjustable wrench.
  • Ensure the power supply is unplugged from mains power before continuing. If the device is powered on during disassembly, serious harm or death may occur.

  • The entire power supply can be taken apart with a Phillips screwdriver and adjustable wrench.

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  • Removing the eight cover screws on either side of the power supply allows the cover to lift off

  • A fuse protects the system from overcurrent conditions and the chassis is grounded to protect the user from shorts to the case.

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Image 1/3: The [http://media.digikey.com/pdf/Data%20Sheets/Sunon%20PDFs/KDE1205PFV2%2011.MS.A.GN.pdf|Sunon MagLev KDE1205PFV2] runs at 4300 RPM for a maximum airflow of 13  CFM.  A dirty fan might not meet these specifications. Remember to clean your fans! Image 2/3: The [http://media.digikey.com/pdf/Data%20Sheets/Sunon%20PDFs/KDE1205PFV2%2011.MS.A.GN.pdf|Sunon MagLev KDE1205PFV2] runs at 4300 RPM for a maximum airflow of 13  CFM.  A dirty fan might not meet these specifications. Remember to clean your fans! Image 3/3: The [http://media.digikey.com/pdf/Data%20Sheets/Sunon%20PDFs/KDE1205PFV2%2011.MS.A.GN.pdf|Sunon MagLev KDE1205PFV2] runs at 4300 RPM for a maximum airflow of 13  CFM.  A dirty fan might not meet these specifications. Remember to clean your fans!
  • The fan connector pulls out by hand. The spade terminal connectors may require coaxing with a pair of pliers.

  • The Sunon MagLev KDE1205PFV2 runs at 4300 RPM for a maximum airflow of 13 CFM. A dirty fan might not meet these specifications. Remember to clean your fans!

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Image 1/3: The switch is hooked up to the primary side of the circuit. If the switch faults while energized, it has potential to electrocute the user. Image 2/3: The switch is hooked up to the primary side of the circuit. If the switch faults while energized, it has potential to electrocute the user. Image 3/3: The switch is hooked up to the primary side of the circuit. If the switch faults while energized, it has potential to electrocute the user.
  • The illuminated switch is connected by two sets of black and white AC wires and held in by two locking tabs.

    • The switch is hooked up to the primary side of the circuit. If the switch faults while energized, it has potential to electrocute the user.

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Image 1/2: The silver heat spreader is screwed to the chassis and must be detached before removing the board. Image 2/2: The silver heat spreader is screwed to the chassis and must be detached before removing the board.
  • Removing the heatsink from the spreader reveals the liberal use of thermal paste. Try not to get it on your hands, it's tough to wash off!

  • The silver heat spreader is screwed to the chassis and must be detached before removing the board.

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Image 1/3: The capacitors may still be charged, do not touch the terminals! The capacitors can be discharged by shorting the terminals with an insulated screwdriver. Image 2/3: The [http://www.st.com/web/en/resource/technical/document/datasheet/CD00000966.pdf|UC3842BN] PWM controller handles the switching feedback. Image 3/3: The chassis has a sheet of plastic for short circuit prevention under the board.
  • The board lifts out of the chassis after removing the five screws holding it down.

    • The capacitors may still be charged, do not touch the terminals! The capacitors can be discharged by shorting the terminals with an insulated screwdriver.

  • The UC3842BN PWM controller handles the switching feedback.

  • The chassis has a sheet of plastic for short circuit prevention under the board.

  • A thermally conductive pad lies under the heatsink assembly for additional cooling capability.

  • Organized parts make reassembly a breeze.

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tjlindborg

Member since: 08/17/2013

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