AmTRAN（瑞軒副廠）型號：AE421SVPAT，送電無反應、指示燈號不亮，無法啟動！維修。

<span style="-webkit-text-stroke-width:0px; color:rgb(0, 0, 0); display:inline !important; float:none; font-family:arial; font-size:medium; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; orphans:2; text-align:left; text-decoration-color:initial; text-decoration-style:initial; text-decoration-thickness:initial; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px">歡迎收看本日『液晶維修』分享！

<div style="color: rgb(0, 0, 0); font-family: Arial; font-size: medium; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">我是—KAO．atun（高雄．阿唐）專業液晶維修（曾仔！）

<div style="color: rgb(0, 0, 0); font-family: Arial; font-size: medium; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">各位早安！ 來看今天的液晶電視維修分享，主角是：AmTRAN（瑞軒副廠）型號：AE421SVPAT

<div class="separator" data-original-attrs="{"style":""}" style="color: rgb(0, 0, 0); font-family: Arial; font-size: medium; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; clear: both;">這是它的內部電路分佈：

<div data-original-attrs="{"style":""}" style="color: rgb(0, 0, 0); font-family: Arial; font-size: medium; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">主人述說：電源指示燈號沒有亮起，機器現在無法啟動！

<div data-original-attrs="{"style":""}" style="color: rgb(0, 0, 0); font-family: Arial; font-size: medium; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">現在我已拆解背蓋，查量了電供板二次側終端輸出，你也應該有看到，電錶數值上都是顯示在『0』。

<span style="-webkit-text-stroke-width:0px; color:rgb(0, 0, 0); display:inline !important; float:none; font-family:arial; font-size:medium; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; orphans:2; text-align:left; text-decoration-color:initial; text-decoration-style:initial; text-decoration-thickness:initial; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px">進一步拔除送往主機板的輸入線材，測試的結果都是一樣的狀態。

<span style="-webkit-text-stroke-width:0px; color:rgb(0, 0, 0); display:inline !important; float:none; font-family:arial; font-size:medium; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; orphans:2; text-align:left; text-decoration-color:initial; text-decoration-style:initial; text-decoration-thickness:initial; text-indent:0px; text-transform:none; white-space:normal; widows:2; word-spacing:0px">毋庸置疑！

<div style="color: rgb(0, 0, 0); font-family: Arial; font-size: medium; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">拆解電供板，查量、除錯、更替料件進行中： <a data-original-attrs="{"data-original-href":"https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEisxiHC78JUtcqIRUh7LSNiLOAE2XloRkxC_4Fw_zerDF6ARsG6nAyXNH3_ureEoUr8RIVPZYvz_eOFOwfQ3F0P0xM1VggFBmxLF6x3wBQPa7mz4hdxyre2lt_x8TygYQD9rlXlYtFXqw9SA-Yr9hmaaVlPGIlPC8WjRNEIz2pEUgIyOZAMfkcXTgeo3V0/s1300/batch_20241113_152836.jpg","style":""}" href="https://www.blogger.com/blog/post/edit/8360646754429671356/790130221175205225#" style="margin-left: 1em; margin-right: 1em;"><img alt="AmTRAN（瑞軒副廠）型號：AE421SVPAT，送電無反" border="0" data-original-height="740" data-original-width="1300" height="364" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEisxiHC78JUtcqIRUh7LSNiLOAE2XloRkxC_4Fw_zerDF6ARsG6nAyXNH3_ureEoUr8RIVPZYvz_eOFOwfQ3F0P0xM1VggFBmxLF6x3wBQPa7mz4hdxyre2lt_x8TygYQD9rlXlYtFXqw9SA-Yr9hmaaVlPGIlPC8WjRNEIz2pEUgIyOZAMfkcXTgeo3V0/w640-h364/batch_20241113_152836.jpg" style="cursor: move;" title="AmTRAN（瑞軒副廠）型號：AE421SVPAT，送電無反" width="640">

這是除錯後的送電，功率計數值的走勢：

<div style="color: rgb(0, 0, 0); font-family: Arial; font-size: medium; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">沒有錯誤，已經走完送電偵測行程，歸『0』了。 " height="266" src="https://img1.blogblog.com/img/video_object.png" style="cursor: move; background-color: rgb(178, 178, 178); background-image: url("/video-thumbnail.g?contentId=0b092c001b2803a1");" title="AmTRAN（瑞軒副廠）型號：AE421SVPAT，送電無反" width="320">

當然也能在電供二次側終端，量測得到待機電壓：DC5V

啟動OK，背光已經亮起：

整機組裝，移防地面上燒機測試了：

提供參考，請多指教！

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更換零件，一律採用 ─ NCC、Rubycon…等，日系無鉛零件！

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