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Category: Teardown

  • LONGWEI LW-305E Power Supply Teardown

    LONGWEI LW-305E Power Supply Teardown

    LW-305E 30V 5A Switching Power Supply

    Casing

    Front
    Side
    Back

    Attention!

    The input capacitors doesn’t have any kind of discharge mechanism. Even if the power supply is unplugged, these capacitor still holds near 300V DC. Proceed with cautious.

    Interior

    PCB Front
    PCB Rear
    Top
    Power input socket
    PCB should have sit in between the notch, somehow it falled out.
    DC output wires
    Display PCB: adjustable
    DC output wire soldering
    Insulation gap & red wires connects to input (110V/220V) voltage switch
    Cooling fan: 12V

    Display Accuracy

    Voltage: 0V
    Voltage: 10V
    Voltage: 20V
    Voltage: 30V
    Current: 100mA
    Current: 500mA
    Current: 1A
    Current: 2.5A
    Current: 5A
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