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LONGWEI LW-305E Power Supply Teardown

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monokeith

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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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