{"id":532,"date":"2021-04-12T16:33:25","date_gmt":"2021-04-12T21:33:25","guid":{"rendered":"http:\/\/10.0.30.44\/?p=532"},"modified":"2025-03-02T21:59:58","modified_gmt":"2025-03-03T02:59:58","slug":"longwei-lw-305e-power-supply-teardown","status":"publish","type":"post","link":"https:\/\/monokeith.ca\/?p=532","title":{"rendered":"LONGWEI LW-305E Power Supply Teardown"},"content":{"rendered":"\n
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<\/span>\"\"
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LW-305E 30V 5A Switching Power Supply<\/mark><\/strong><\/h1>\n<\/div><\/div>\n\n\n\n
<\/div>\n<\/div>\n\n\n\n
<\/div>\n\n\n\n
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Casing<\/h2>\n<\/div>\n\n\n\n
\n
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Front<\/figcaption><\/figure>\n\n\n\n
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Side<\/figcaption><\/figure>\n\n\n\n
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Back<\/figcaption><\/figure>\n<\/figure>\n\n\n\n
<\/div>\n\n\n\n

Attention!<\/h2>\n\n\n\n

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.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n
<\/div>\n\n\n\n

Interior<\/h2>\n\n\n\n
\n
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PCB Front<\/figcaption><\/figure>\n\n\n\n
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PCB Rear<\/figcaption><\/figure>\n\n\n\n
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Top<\/figcaption><\/figure>\n\n\n\n
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Power input socket<\/figcaption><\/figure>\n\n\n\n
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PCB should have sit in between the notch, somehow it falled out. <\/figcaption><\/figure>\n\n\n\n
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DC output wires<\/figcaption><\/figure>\n\n\n\n
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Display PCB: adjustable<\/figcaption><\/figure>\n\n\n\n
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DC output wire soldering<\/figcaption><\/figure>\n\n\n\n
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Insulation gap & red wires connects to input (110V\/220V) voltage switch<\/figcaption><\/figure>\n\n\n\n
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Cooling fan: 12V<\/figcaption><\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n<\/figure>\n\n\n\n
<\/div>\n\n\n\n

Display Accuracy<\/h2>\n\n\n\n
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Voltage: 0V<\/figcaption><\/figure>\n\n\n\n
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Voltage: 10V<\/figcaption><\/figure>\n\n\n\n
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Voltage: 20V<\/figcaption><\/figure>\n\n\n\n
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Voltage: 30V<\/figcaption><\/figure>\n\n\n\n
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Current: 100mA<\/figcaption><\/figure>\n\n\n\n
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Current: 500mA<\/figcaption><\/figure>\n\n\n\n
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Current: 1A<\/figcaption><\/figure>\n\n\n\n
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Current: 2.5A<\/figcaption><\/figure>\n\n\n\n
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Current: 5A<\/figcaption><\/figure>\n<\/figure>\n","protected":false},"excerpt":{"rendered":"

Casing 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 Display Accuracy<\/p>\n","protected":false},"author":1,"featured_media":534,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-532","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-teardown"],"_links":{"self":[{"href":"https:\/\/monokeith.ca\/index.php?rest_route=\/wp\/v2\/posts\/532","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/monokeith.ca\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/monokeith.ca\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/monokeith.ca\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/monokeith.ca\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=532"}],"version-history":[{"count":13,"href":"https:\/\/monokeith.ca\/index.php?rest_route=\/wp\/v2\/posts\/532\/revisions"}],"predecessor-version":[{"id":617,"href":"https:\/\/monokeith.ca\/index.php?rest_route=\/wp\/v2\/posts\/532\/revisions\/617"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/monokeith.ca\/index.php?rest_route=\/wp\/v2\/media\/534"}],"wp:attachment":[{"href":"https:\/\/monokeith.ca\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=532"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/monokeith.ca\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=532"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/monokeith.ca\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=532"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}