{"id":177,"date":"2022-07-26T15:18:45","date_gmt":"2022-07-26T07:18:45","guid":{"rendered":"https:\/\/www.ddzheng.cc\/?p=177"},"modified":"2023-08-15T00:41:29","modified_gmt":"2023-08-14T16:41:29","slug":"alesis-m1-active-mk2-repair-%e7%bb%b4%e4%bf%ae%e8%ae%b0%e5%bd%95","status":"publish","type":"post","link":"https:\/\/www.ddzheng.cc\/?p=177","title":{"rendered":"Alesis M1 Active MK2 Repair \u7ef4\u4fee\u8bb0\u5f55"},"content":{"rendered":"<h2 class=\"simpletoc-title\">Table of Contents<\/h2>\n<ul class=\"simpletoc-list\">\n<li><a href=\"#overview\">Overview<\/a>\n\n<\/li>\n<li><a href=\"#%25e5%258a%259f%25e6%2594%25be%25e6%259d%25bf%25e7%25bb%25b4%25e4%25bf%25ae-amp-unit-repair\">\u529f\u653e\u677f\u7ef4\u4fee \/ Amp Unit Repair<\/a>\n\n\n<ul><li>\n<a href=\"#%25e9%2597%25ae%25e9%25a2%2598%25e8%25af%258a%25e6%2596%25ad-diagnosing\">\u95ee\u9898\u8bca\u65ad \/ Diagnosing<\/a>\n\n<\/li>\n<li><a href=\"#%25e7%2594%25b5%25e8%25b7%25af%25e6%259d%25bf%25e7%25bb%25b4%25e4%25bf%25ae-pcb-repair\">\u7535\u8def\u677f\u7ef4\u4fee \/ PCB Repair<\/a>\n\n<\/li>\n<li><a href=\"#%25e6%25b5%258b%25e8%25af%2595%25e7%2594%25b5%25e6%25ba%2590%25e6%259d%25bf-testing-the-psu\">\u6d4b\u8bd5\u7535\u6e90\u677f Testing the PSU<\/a>\n\n<\/li>\n<li><a href=\"#%25e6%2589%2593%25e7%2590%2586%25e5%258a%259f%25e6%2594%25be%25e6%259d%25bf-work-on-the-amp-board\">\u6253\u7406\u529f\u653e\u677f \/ Work on the Amp Board<\/a>\n\n<\/li>\n<li><a href=\"#%25e5%258a%259f%25e6%2594%25be%25e7%25bb%2584%25e8%25a3%2585-reassembling-amp-unit\">\u529f\u653e\u7ec4\u88c5 \/ Reassembling Amp Unit<\/a>\n\n<\/li>\n<li><a href=\"#%25e4%25bf%25ae%25e7%2590%2586xlr%25e8%25bf%259e%25e6%258e%25a5%25e5%2599%25a8-repair-xlr-connector\">\u4fee\u7406XLR\u8fde\u63a5\u5668 \/ Repair XLR Connector<\/a>\n\n<\/li>\n<\/ul>\n<li><a href=\"#%25e7%25ae%25b1%25e4%25bd%2593%25e7%25bb%25b4%25e4%25bf%25ae-cabinet-repair\">\u7bb1\u4f53\u7ef4\u4fee \/ Cabinet repair<\/a>\n\n<\/li>\n<li><a href=\"#%25e5%2596%2587%25e5%258f%25ad%25e5%258d%2595%25e5%2585%2583%25e7%25bb%25b4%25e4%25bf%25ae-speaker-driver-repair\">\u5587\u53ed\u5355\u5143\u7ef4\u4fee \/ Speaker Driver Repair<\/a>\n\n\n<ul><li>\n<a href=\"#%25e9%25ab%2598%25e9%259f%25b3%25e6%259b%25b4%25e6%258d%25a2%25e7%25a3%2581%25e6%25b6%25b2-replace-ferrofluid-in-tweeters\">\u9ad8\u97f3\u66f4\u6362\u78c1\u6db2 \/ Replace Ferrofluid in Tweeters<\/a>\n\n<\/li>\n<\/ul>\n<li><a href=\"#%25e7%25bb%2584%25e8%25a3%2585-reassembling\">\u7ec4\u88c5 \/ Reassembling<\/a>\n\n<\/li>\n<li><a href=\"#%25e4%25bd%25bf%25e7%2594%25a8%25e4%25bd%2593%25e9%25aa%258c-experience-using-the-speakers\">\u4f7f\u7528\u4f53\u9a8c \/ Experience Using the Speakers<\/a>\n<\/li><\/ul>\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0136.jpg\" alt=\"\" class=\"wp-image-178\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0136.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0136-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0136-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0136-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0136-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n\n\n<h1 class=\"wp-block-heading\" id=\"overview\">Overview<\/h1>\n\n\n<p>\u6700\u8fd1\u82b1400\u5143\u6536\u4e86\u4e00\u5bf9\u6709\u95ee\u9898\u7684Alesis M1 Mk2\u6709\u6e90\u76d1\u542c\u97f3\u7bb1\uff0c\u8fd9\u6b3e\u97f3\u7bb1\u57282010\u5e74\u524d\u540e\u662f\u5f88\u53d7\u6b22\u8fce\u7684\u578b\u53f7\u3002\u4e0d\u5e78\u7684\u662f\uff0c\u56e0\u4e3a\u7535\u8def\u677f\u8bbe\u8ba1\u95ee\u9898\u6bd4\u8f83\u591a\uff0c\u6ca1\u6709\u591a\u5c11\u7559\u5b58\u5230\u73b0\u5728\u4e86\u3002<\/p>\n\n\n\n<p>I recently acquired a pair of Alesis M1 Mk2 monitor speakers for about US$70. This&nbsp;was a very popular model around the 2010s. Unfortunately due to bad PCB designs there aren&#8217;t many left now.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"720\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/23785410188ad333cd15572a5b492b9b6461110e.png@1320w_742h.webp\" alt=\"\" class=\"wp-image-179\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/23785410188ad333cd15572a5b492b9b6461110e.png@1320w_742h.webp 1280w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/23785410188ad333cd15572a5b492b9b6461110e.png@1320w_742h-720x405.webp 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/23785410188ad333cd15572a5b492b9b6461110e.png@1320w_742h-256x144.webp 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/23785410188ad333cd15572a5b492b9b6461110e.png@1320w_742h-768x432.webp 768w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/figure>\n\n\n\n<p>\u6211\u6536\u5230\u7684\u8fd9\u4e00\u5bf92\u53ea\u97f3\u7bb1\uff0c\u62ff\u5230\u7684\u65f6\u5019\u67091\u53ea\u5de5\u4f5c\u6b63\u5e38\uff0c\u53e6\u4e00\u53ea\u4e0d\u4e0a\u7535\u3002\u62c6\u673a\u68c0\u67e5\u540e\u53d1\u73b0\u635f\u574f\u60c5\u51b5\uff1a<\/p>\n\n\n\n<p>The pair I got have one speaker working normally while the other one won&#8217;t power on. After tearing down I found the following faults:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>Part<\/td><td>One<\/td><td>The other one<\/td><\/tr><tr><td>Cabinet<br>\u7bb1\u4f53<\/td><td>Normal<br>\u6b63\u5e38<\/td><td>Water damage<br>\u6ce1\u6c34<\/td><\/tr><tr><td>PSU Board<br>\u7535\u6e90\u677f<\/td><td>Fried, with previous repair<br>\u635f\u574f\uff0c\u66fe\u7ecf\u6709\u7ef4\u4fee<\/td><td>Normal, with bulging caps<br>\u6b63\u5e38\uff0c\u7535\u5bb9\u9f13\u5305<\/td><\/tr><tr><td>Tweeters<br>\u9ad8\u97f3\u5355\u5143<\/td><td>dried up ferrofluid<br>\u78c1\u6db2\u5e72\u4e86<\/td><td>dried up ferrofluid<br>\u78c1\u6db2\u5e72\u4e86<\/td><\/tr><tr><td>Woofers<br>\u4f4e\u97f3\u5355\u5143<\/td><td>Normal<br>\u6b63\u5e38<\/td><td>Pushed in dust cap<br>\u9632\u5c18\u5e3d\u51f9\u9677<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" data-id=\"180\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/1647763595524.jpg\" alt=\"\" class=\"wp-image-180\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/1647763595524.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/1647763595524-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/1647763595524-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/1647763595524-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/1647763595524-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" data-id=\"181\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/1647763580313.jpg\" alt=\"\" class=\"wp-image-181\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/1647763580313.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/1647763580313-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/1647763580313-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/1647763580313-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/1647763580313-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n<\/figure>\n\n\n\n<p>\u6240\u4ee5\u7ef4\u4fee\u5305\u62ec\u4e86\u7535\u8def\u677f\u3001\u5355\u5143\u4ee5\u53ca\u7bb1\u4f53\u4e09\u4e2a\u90e8\u5206\u3002\u5b9e\u9645\u5de5\u4f5c\u91cf\u6bd4\u6211\u60f3\u8c61\u4e2d\u5927\u4e86\u4e0d\u5c11\uff0c\u7531\u4e8e\u57fa\u672c\u53ea\u6709\u5468\u672b\u5904\u7406\u8fd9\u4e2a\u5de5\u4f5c\uff0c\u6574\u4e2a\u9879\u76ee\u6301\u7eed\u4e86\u4e00\u4e2a\u591a\u6708\u7684\u65f6\u95f4\u3002<\/p>\n\n\n\n<p>Repair can be split into 3 parts: PCBs, drivers and cabinets. It was a lot more work than I imagined, and due to I only work on this project during weekend it&nbsp;took more than a month to finish all of the work.<\/p>\n\n\n<h1 class=\"wp-block-heading\" id=\"%25e5%258a%259f%25e6%2594%25be%25e6%259d%25bf%25e7%25bb%25b4%25e4%25bf%25ae-amp-unit-repair\">\u529f\u653e\u677f\u7ef4\u4fee \/ Amp Unit Repair<\/h1>\n\n<h2 class=\"wp-block-heading\" id=\"%25e9%2597%25ae%25e9%25a2%2598%25e8%25af%258a%25e6%2596%25ad-diagnosing\">\u95ee\u9898\u8bca\u65ad \/ Diagnosing<\/h2>\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1164\" height=\"498\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/\u6355\u83b7-2.png\" alt=\"\" class=\"wp-image-182\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/\u6355\u83b7-2.png 1164w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/\u6355\u83b7-2-720x308.png 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/\u6355\u83b7-2-256x110.png 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/\u6355\u83b7-2-768x329.png 768w\" sizes=\"auto, (max-width: 1164px) 100vw, 1164px\" \/><\/figure>\n\n\n\n<p>\u5728badcaps\u8bba\u575b\u4e0a\u6709\u4e00\u4e2a20\u9875\u957f\u7684\u7f6e\u9876\u5e16\u5b50\uff08<a href=\"https:\/\/www.badcaps.net\/forum\/showthread.php?t=10910\">https:\/\/www.badcaps.net\/forum\/showthread.php?t=10910<\/a>\uff09\uff0c\u5168\u90e8\u90fd\u662f\u5173\u4e8e\u7ef4\u4fee\u8fd9\u6b3e\u97f3\u7bb1\u7684\u7535\u5668\u90e8\u5206\u7684\uff0c\u63d0\u4f9b\u4e86\u5f88\u591a\u975e\u5e38\u6709\u7528\u7684\u4fe1\u606f\u3002\u6839\u636e\u7f51\u7edc\u4e0a\u7684\u4fe1\u606f\u3001\u7ef4\u4fee\u624b\u518c\u4ee5\u53ca\u68c0\u67e5\u6d4b\u91cf\uff0c\u53d1\u73b0\u5982\u4e0b\u95ee\u9898\uff1a<\/p>\n\n\n\n<p>There is a 20-page long sticky thread on the badcaps forum (<a href=\"https:\/\/www.badcaps.net\/forum\/showthread.php?t=10910\">https:\/\/www.badcaps.net\/forum\/showthread.php?t=10910<\/a>)&nbsp;about repairing the electronics of this speaker, which provided a lot of useful information. Based on these knowledge, service manual, and inspection and measurements, I discovered following problems in the non-working PSU board:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0046.jpg\" alt=\"\" class=\"wp-image-183\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0046.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0046-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0046-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0046-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0046-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n\n\n\n<p>\u6700\u660e\u663e\u7684\u662fR11\u5df2\u7ecf\u70e7\u7cca\u4e86\uff0c\u8bf4\u660eQ1 S\u6781\u6709\u4ece\u4e3b\u8fb9\u6ee4\u6ce2\u7535\u5bb9\u6765\u7684\u9ad8\u7535\u538b\uff08Q1 GDS\u5168\u90e8\u77ed\u8def\uff0c\u6d4b\u91cf\u8bc1\u5b9e\uff09\u3002\u8fd9\u4e2a\u9ad8\u538b\u70e7\u6bc1\u4e86\u91c7\u6837\u7535\u963bR15\u4e4b\u540e\uff0c\u70e7\u6bc1R11\u3002\u56e0\u6b64R10\u53ef\u80fd\u4e5f\u6709\u635f\u574f\u3002\u9ad8\u538b\u901a\u8fc7Q1 G\u6781\uff0c\u70e7\u6bc1Q3\uff08Q3\u70b8\u4e86\uff09\u3001Q4\uff0c\u56e0\u6b64C15\u3001D9\u3001R13\u3001R12\u3001C13\u53ef\u80fd\u4e5f\u6709\u635f\u574f\u3002\u53bb\u5f80\u5149\u8026\u7684\u7ebf\u8def\u6709\u8fc7\u6d41\u75d5\u8ff9\uff0c\u4f46\u662f\u6ca1\u70e7\u65ad\uff0c\u8bf4\u660e\u9ad8\u538b\u4e5f\u53bb\u5230\u4e86VCC\u7f51\u7edc\uff0c\u56e0\u6b64U1\u5fc5\u7136\u5df2\u7ecf\u6302\u4e86\uff0c\u5149\u8026\u4e5f\u5927\u6982\u7387\u635f\u574f\u3002<\/p>\n\n\n\n<p>The most obvious fault was that R11 was obliterated, which means high voltage from mains filtering caps was present on source pin of Q1 (Q1&#8217;s GDS were all shorted together, confirmed by off-board measurements). This high voltage fried current sense resistor R15 before frying R11. Thus, R10 may also be damaged. The high voltage went through gate of Q1, fried Q4 and exploded Q3. C15 D9 R13 R12 may have also took damage. The silkscreen on the trace to the optocoupler were black suggesting over-current, which means high voltage was present on VCC network, so U1 must have been broken, alone with the optocoupler.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1752\" height=\"1101\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/\u6355\u83b72.jpg\" alt=\"\" class=\"wp-image-184\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/\u6355\u83b72.jpg 1752w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/\u6355\u83b72-720x452.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/\u6355\u83b72-256x161.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/\u6355\u83b72-768x483.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/\u6355\u83b72-1536x965.jpg 1536w\" sizes=\"auto, (max-width: 1752px) 100vw, 1752px\" \/><\/figure>\n\n\n<h2 class=\"wp-block-heading\" id=\"%25e7%2594%25b5%25e8%25b7%25af%25e6%259d%25bf%25e7%25bb%25b4%25e4%25bf%25ae-pcb-repair\">\u7535\u8def\u677f\u7ef4\u4fee \/ PCB Repair<\/h2>\n\n\n<p>\u5176\u4ed6\u95ee\u9898\u5305\u62ec\u6574\u6d41\u6865\u70e7\u6bc1\u3001NTC\u70e7\u6bc1\u3001D14 D16\u88ab\u66ff\u6362\u6210FR107\uff08\u6027\u80fd\u6bd4\u8981\u6c42\u7684MUR160\u5dee\u5f88\u591a\uff09\u3001\u7535\u5bb9\u9f13\u5305\u3002\u6240\u4ee5\u63a5\u4e0b\u6765\u79fb\u9664\u6240\u6709\u53ef\u80fd\u6709\u95ee\u9898\u7684\u539f\u4ef6\uff0c\u5e76\u8fdb\u884c\u68c0\u6d4b\u3002\u5bf9\u4e8e\u53ef\u80fd\u6709\u635f\u4f24\u7684\u539f\u4ef6\uff08\u5c24\u5176\u662f\u534a\u5bfc\u4f53\u5668\u4ef6\uff09\u5168\u90e8\u66f4\u6362\u4e0d\u4fdd\u7559\u3002\u6211\u5728\u7acb\u521b\u5546\u57ce\u8d2d\u4e70\u4e86\u539f\u4ef6\u3002<\/p>\n\n\n\n<p>\u7531\u4e8eUC3842\u5df2\u7ecf\u505c\u4ea7\uff0c\u5bf9\u6bd4datasheet\u540e\uff0c\u6211\u9009\u62e9\u4f7f\u7528\u65b0\u578b\u53f7UC3842B\u8fdb\u884c\u66ff\u6362\u3002UC3842B\u542f\u52a8\u7535\u6d41\u6bd4UC3842\u5c0f\uff0c\u5176\u4ed6\u53c2\u6570\u4e00\u81f4\u6216\u66f4\u597d\uff0c\u5e94\u8be5\u53ef\u4ee5\u76f4\u63a5\u66ff\u6362\u3002<\/p>\n\n\n\n<p>MOS\u7ba1\u7528ST\u7684\u5851\u6599\u5c01\u88c5600V 10A\u66ff\u6362\uff0cD14 D16\u7528SF18G 600V 35ns\u8d85\u5feb\u6062\u590d\u4e8c\u6781\u7ba1\u4ee3\u66ff\uff0c\u5149\u8026\u7528CNY17-4\u66ff\u6362\u3002<strong>\u6240\u6709\u7535\u89e3\u7535\u5bb9\u90fd\u6362\u6210\u4e86\u65e5\u672c\u5316\u5de5\u3001\u7ea2\u5b9d\u77f3\u6216\u8005\u5c3c\u5409\u5eb7<\/strong>\u3002<\/p>\n\n\n\n<p>Other problems include fried 1N4007, exploded inrush limiting NTC, D14 D16 were replaced with FR107s which&nbsp;have poor performance, and bulging caps. So next step was to remove all offending components and test them. I also choose to replace any component that may have been damaged, especially semiconductors. I bought replacement parts from LCSC.&nbsp;<\/p>\n\n\n\n<p>As UC3842 has been discontinued, I bought UC3842B by ST to replace the IC. UC3842B has smaller start-up current with other parameter being mostly identical or better, so there should be no problem using it.&nbsp;<\/p>\n\n\n\n<p>MOSFETs were replaced with two 600V 10A ST MOSFETs in plastic TO-220 package.&nbsp;SF18G&nbsp;600V 35ns ultrafast diodes were used&nbsp;for D14 D16. Optocoupler was replace with a CNY17-4.&nbsp;<strong>All electrolytic caps were replaced with either Chemi-Con, Rubycon or Nichicon ones.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1350\" height=\"1800\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0047.jpg\" alt=\"\" class=\"wp-image-185\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0047.jpg 1350w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0047-540x720.jpg 540w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0047-192x256.jpg 192w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0047-768x1024.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0047-1152x1536.jpg 1152w\" sizes=\"auto, (max-width: 1350px) 100vw, 1350px\" \/><\/figure>\n\n\n\n<p>\u7535\u6e90\u677f\u5bb9\u6613\u70e7\u6bc1\u7684\u539f\u56e0\u662fR3 R4\u963b\u503c\u8f83\u5c0f\uff0c\u53d1\u70ed\u5927\u800c\u4e14\u79bbVCC\u6ee4\u6ce2\u7535\u5bb9C8\u592a\u8fd1\uff0c\u5f00\u5173\u7ba1\u7684\u6563\u70ed\u7247\u4e5f\u5728C8\u65c1\u8fb9\uff0c\u5c06C8\u70e4\u574f\u3002R3 R4\u662f\u4e3b\u6ee4\u6ce2\u7535\u5bb9\u7684\u6cc4\u653e\u7535\u963b\u3001\u5747\u538b\u7535\u963b\u4ee5\u53ca\u542f\u52a8\u65f6VCC\u7535\u6e90\u7684\u6765\u6e90\u3002\u542f\u52a8\u65f6\u9ad8\u538b\u76f4\u6d41\u901a\u8fc7R3 R4\u5411C8\u5145\u7535\uff0c\u5f53\u7535\u538b\u8fbe\u523015V\u5de6\u53f3\u65f6\uff0cU1\u542f\u52a8\uff0c\u4e00\u65e6\u5f00\u59cb\u5f00\u5173\uff0cVCC\u7535\u6e90\u7531\u8f85\u52a9\u7ed5\u7ec4T1B\u7ecf\u8fc7D5\u6574\u6d41\u63d0\u4f9b\u3002<\/p>\n\n\n\n<p>The reason the PSU board is prone to self-destroy is that R3 and R4 have relatively small value thus generate a lot of heat. They were placed close to VCC filtering cap C8, and switching transistor&#8217;s heatsink was close to C8 as well so they constantly bake C8 until it dies, taking out everything. R3 R4 serves as discharge resistor, voltage balance network and startup source. On powering up, high voltage DC charges C8 through R3 R4, when voltage on C8 reaches about 15V, U1 starts and once switching is established VCC is supplied by auxiliary winding T1B and rectifier D5.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"766\" height=\"694\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/518903a381fb37c81f24c3c72a94e571756729d3.png@1320w_1196h.webp\" alt=\"\" class=\"wp-image-186\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/518903a381fb37c81f24c3c72a94e571756729d3.png@1320w_1196h.webp 766w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/518903a381fb37c81f24c3c72a94e571756729d3.png@1320w_1196h-720x652.webp 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/518903a381fb37c81f24c3c72a94e571756729d3.png@1320w_1196h-256x232.webp 256w\" sizes=\"auto, (max-width: 766px) 100vw, 766px\" \/><\/figure>\n\n\n\n<p>\u6839\u636ebadcaps\u8bba\u575b\u4e0a\u7684\u5e16\u5b50\u548c\u6211\u7684\u5206\u6790\uff0c\u6211\u5c06C8\u79fb\u52a8\u81f3C14\u7684\u4f4d\u7f6e\u6765\u8fdc\u79bb\u70ed\u6e90\uff0cC14\u79fb\u52a8\u5230\u677f\u5b50\u80cc\u9762\u3002R3 R4\u589e\u52a0\u523068K\u3002\u8fd9\u53ef\u4ee5\u907f\u514d\u5c06\u6765\u51fa\u73b0\u540c\u6837\u7684\u95ee\u9898\u3002<\/p>\n\n\n\n<p>Based on the Badcaps thread and some analysis, I decided to move C8 to C14 to keep it away from the hot spot, move C14 to bottom side of PCB and increase R3 R4 to 68K. This should avoid or at least delay the same problem from happening in the future.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1320\" height=\"759\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/9aa09323fe9411a658bfacced72051d616beaca2.png@1320w_760h.webp\" alt=\"\" class=\"wp-image-187\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/9aa09323fe9411a658bfacced72051d616beaca2.png@1320w_760h.webp 1320w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/9aa09323fe9411a658bfacced72051d616beaca2.png@1320w_760h-720x414.webp 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/9aa09323fe9411a658bfacced72051d616beaca2.png@1320w_760h-256x147.webp 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/9aa09323fe9411a658bfacced72051d616beaca2.png@1320w_760h-768x442.webp 768w\" sizes=\"auto, (max-width: 1320px) 100vw, 1320px\" \/><\/figure>\n\n\n\n<p>\u539f\u4ef6\u5230\u4e86\u4e4b\u540e\u5c31\u662f\u5e38\u89c4\u7684\u710a\u63a5\u66f4\u6362\u3002\u53ef\u4ee5\u770b\u5230C8\u88ab\u79fb\u52a8\u5230\u4e86C14\u7684\u4f4d\u7f6e\u3002<\/p>\n\n\n\n<p>After the parts arrived, I soldered everything on as usual. C8 can be seen at the location of C14.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1320\" height=\"990\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/8dd506b276c7e028ac5adb11931f3923e304eb72.jpg@1320w_990h.webp\" alt=\"\" class=\"wp-image-188\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/8dd506b276c7e028ac5adb11931f3923e304eb72.jpg@1320w_990h.webp 1320w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/8dd506b276c7e028ac5adb11931f3923e304eb72.jpg@1320w_990h-720x540.webp 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/8dd506b276c7e028ac5adb11931f3923e304eb72.jpg@1320w_990h-256x192.webp 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/8dd506b276c7e028ac5adb11931f3923e304eb72.jpg@1320w_990h-768x576.webp 768w\" sizes=\"auto, (max-width: 1320px) 100vw, 1320px\" \/><figcaption class=\"wp-element-caption\">All shiny new electrolytic caps<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1320\" height=\"1760\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/c8f45ef5233312b64167af22e09a9455bbd09c20.jpg@1320w_1760h-1.webp\" alt=\"\" class=\"wp-image-190\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/c8f45ef5233312b64167af22e09a9455bbd09c20.jpg@1320w_1760h-1.webp 1320w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/c8f45ef5233312b64167af22e09a9455bbd09c20.jpg@1320w_1760h-1-540x720.webp 540w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/c8f45ef5233312b64167af22e09a9455bbd09c20.jpg@1320w_1760h-1-192x256.webp 192w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/c8f45ef5233312b64167af22e09a9455bbd09c20.jpg@1320w_1760h-1-768x1024.webp 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/c8f45ef5233312b64167af22e09a9455bbd09c20.jpg@1320w_1760h-1-1152x1536.webp 1152w\" sizes=\"auto, (max-width: 1320px) 100vw, 1320px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1320\" height=\"1760\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/cbdb0b1a374dd53d7665dd8d19429a61d21d8e66.jpg@1320w_1760h.webp\" alt=\"\" class=\"wp-image-191\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/cbdb0b1a374dd53d7665dd8d19429a61d21d8e66.jpg@1320w_1760h.webp 1320w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/cbdb0b1a374dd53d7665dd8d19429a61d21d8e66.jpg@1320w_1760h-540x720.webp 540w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/cbdb0b1a374dd53d7665dd8d19429a61d21d8e66.jpg@1320w_1760h-192x256.webp 192w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/cbdb0b1a374dd53d7665dd8d19429a61d21d8e66.jpg@1320w_1760h-768x1024.webp 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/cbdb0b1a374dd53d7665dd8d19429a61d21d8e66.jpg@1320w_1760h-1152x1536.webp 1152w\" sizes=\"auto, (max-width: 1320px) 100vw, 1320px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" data-id=\"192\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0121.jpg\" alt=\"\" class=\"wp-image-192\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0121.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0121-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0121-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0121-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0121-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" data-id=\"193\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/20220319_182838.jpg\" alt=\"\" class=\"wp-image-193\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/20220319_182838.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/20220319_182838-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/20220319_182838-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/20220319_182838-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/20220319_182838-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" data-id=\"194\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/20220319_182929.jpg\" alt=\"\" class=\"wp-image-194\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/20220319_182929.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/20220319_182929-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/20220319_182929-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/20220319_182929-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/20220319_182929-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n<\/figure>\n\n\n<h2 class=\"wp-block-heading\" id=\"%25e6%25b5%258b%25e8%25af%2595%25e7%2594%25b5%25e6%25ba%2590%25e6%259d%25bf-testing-the-psu\">\u6d4b\u8bd5\u7535\u6e90\u677f Testing the PSU<\/h2>\n\n\n<p>\u6d4b\u8bd5\u7535\u6e90\u677f\u65f6\uff0c\u4e3a\u4e86\u9632\u6b62\u66f4\u591a\u635f\u574f\uff0c\u4ee5\u53ca\u7206\u70b8\u4f24\u5bb3\uff0c\u6211\u7528\u4e32\u8054\u706f\u6ce1\u7684\u65b9\u5f0f\u8fdb\u884c\u8c03\u8bd5\u3002\u4e00\u4e2a100W\u7684\u767d\u70bd\u706f\u6ce1\u88ab\u4e32\u8054\u5728220V\u7ebf\u8def\u4e2d\u3002\u8fd9\u6837\uff0c\u5982\u679c\u7535\u6e90\u6ca1\u6709\u95ee\u9898\uff0c\u4e0a\u7535\u7684\u65f6\u5019\u706f\u6ce1\u4f1a\u4eae\u4e00\u4e0b\uff0c\u4e4b\u540e\u5c31\u4e0d\u4eae\u4e86\u3002\u5982\u679c\u7535\u6e90\u6709\u77ed\u8def\uff0c\u706f\u6ce1\u4f1a\u4e00\u76f4\u4eae\uff0c\u5e76\u4e14\u7531\u4e8e\u706f\u6ce1\u529f\u7387\u662f100W\uff0c\u77ed\u8def\u7535\u6d41\u88ab\u9650\u5236\u4e3a0.5A\u4ee5\u4e0b\u3002<\/p>\n\n\n\n<p>When testing the PSU, to avoid further damages and injuries to myself, I used the series-bulb method. A 100W incandescent&nbsp;light bulb was put in series between mains power and&nbsp;PSU. That way, if the PSU is fine, the bulb will light up briefly on plugging in the power, and remain off later. If there is a short circuit in the PSU, bulb will light up. As the power of the bulb is 100W it will limit the short-circuit current to below 0.5A.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-3 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1350\" height=\"1800\" data-id=\"195\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0074.jpg\" alt=\"\" class=\"wp-image-195\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0074.jpg 1350w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0074-540x720.jpg 540w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0074-192x256.jpg 192w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0074-768x1024.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0074-1152x1536.jpg 1152w\" sizes=\"auto, (max-width: 1350px) 100vw, 1350px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" data-id=\"196\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0075.jpg\" alt=\"\" class=\"wp-image-196\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0075.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0075-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0075-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0075-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0075-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n<\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0101.jpg\" alt=\"\" class=\"wp-image-197\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0101.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0101-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0101-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0101-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0101-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n\n\n\n<p>\u6d4b\u8bd5\u65f6\u6211\u6ca1\u6709\u8003\u8651\u5230\u8fd9\u4e2a\u7535\u6e90\u5728\u7a7a\u8f7d\u65f6\u4e0d\u7a33\u5b9a\uff0c\u6240\u4ee5\u5bfc\u81f4\u8d70\u4e86\u5f88\u591a\u5f2f\u8def\u3002\u6302\u4e0a\u529f\u653e\u677f\u540e\u5c31\u6ca1\u6709\u95ee\u9898\u4e86\u3002<\/p>\n\n\n\n<p>\u6d4b\u8bd5\u6ca1\u6709\u95ee\u9898\u4e4b\u540e\u6211\u5c06\u6b63\u5e38\u5de5\u4f5c\u7684\u90a3\u5757\u7535\u6e90\u677f\u8fdb\u884c\u4e86\u66f4\u6362\u7535\u5bb9\uff0c\u5c06R3 R4 U1 C8 C14\u4e5f\u8fdb\u884c\u4e86\u76f8\u5e94\u7684\u66f4\u6539\u3002<\/p>\n\n\n\n<p>I didn&#8217;t know this PSU cannot run under no load, which created a lot of confusion for me. Luckily everything worked out after I hooked up the amplifier board.&nbsp;<\/p>\n\n\n\n<p>After some testing I decided it is good enough so I performed the same change of R3 R4 U1 C8 C14 on the still working board, and replaced all electrolytic caps.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0095.jpg\" alt=\"\" class=\"wp-image-198\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0095.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0095-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0095-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0095-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0095-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><figcaption class=\"wp-element-caption\">The still working board, before recapping<\/figcaption><\/figure>\n\n\n<h2 class=\"wp-block-heading\" id=\"%25e6%2589%2593%25e7%2590%2586%25e5%258a%259f%25e6%2594%25be%25e6%259d%25bf-work-on-the-amp-board\">\u6253\u7406\u529f\u653e\u677f \/ Work on the Amp Board<\/h2>\n\n\n<p>\u529f\u653e\u677f\u4e0a\u7684\u6240\u6709\u7535\u89e3\u7535\u5bb9\u4e5f\u8fdb\u884c\u4e86\u66f4\u6362\u3002<\/p>\n\n\n\n<p>All electrolytic caps on both of the amp boards were also replaced.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0093.jpg\" alt=\"\" class=\"wp-image-199\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0093.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0093-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0093-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0093-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0093-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n\n\n\n<p>\u770b\u8fc7EEVBlog\u7684\u89c6\u9891\u4e4b\u540e\uff0c\u4e3a\u4e86\u9632\u6b62\u97f3\u9891\u632f\u52a8\u5bfc\u81f4\u7684\u635f\u574f\uff0c\u6240\u6709\u5927\u578b\u539f\u4ef6\u90fd\u7528704\u7845\u6a61\u80f6\u8fdb\u884c\u4e86\u52a0\u56fa\u3002<\/p>\n\n\n\n<p>I watched the EEVBlog video and didn&#8217;t want no component to be &#8220;flapping in the breeze&#8221;. So to prevent damage caused by vibration, I applied RTV silicone rubber to all large components.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1350\" height=\"1800\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0119.jpg\" alt=\"\" class=\"wp-image-200\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0119.jpg 1350w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0119-540x720.jpg 540w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0119-192x256.jpg 192w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0119-768x1024.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0119-1152x1536.jpg 1152w\" sizes=\"auto, (max-width: 1350px) 100vw, 1350px\" \/><\/figure>\n\n\n<h2 class=\"wp-block-heading\" id=\"%25e5%258a%259f%25e6%2594%25be%25e7%25bb%2584%25e8%25a3%2585-reassembling-amp-unit\">\u529f\u653e\u7ec4\u88c5 \/ Reassembling Amp Unit<\/h2>\n\n\n<p>\u62c6\u5378\u529f\u653e\u677f\u7684\u65f6\u5019\u53d1\u73b0\u56fa\u5b9a\u529f\u653e\u82af\u7247\u7684\u87ba\u4e1d\u975e\u5e38\u7d27\uff0c\u6000\u7591\u662f\u5bfc\u70ed\u94dd\u677f\u4e0a\u6ca1\u6709\u653b\u4e1d\uff0c\u76f4\u63a5\u62e7\u5165\u7684\u3002\u62c6\u4e0b\u7684\u65f6\u5019\u87ba\u4e1d\u5934\u5168\u90e8\u635f\u574f\u4e86\uff0c\u8fd8\u628a\u6211\u7684\u5357\u65d7\u6279\u5934\u641e\u574f\u4e86\u3002\u56de\u88c5\u7684\u65f6\u5019\uff0c\u6211\u628a\u539f\u6709\u7684\u5b54\u6269\u5927\u4e3a3mm\uff0c\u5728\u5bfc\u70ed\u677f\u540e\u9762\u52a0\u4e86\u87ba\u6bcd\uff0c\u7528M3\u87ba\u4e1d\u56fa\u5b9a\u3002<\/p>\n\n\n\n<p>When disassembling the amp I found that the screws holding the power amp IC were extremely tight, as if&nbsp;there&nbsp;were no threads on the aluminum board and they just screwed it in by force. All 4 screw heads were badly damaged, and it even managed to bite out one of my screwdriver bit. When installing it back in, I drilled the hole to 3mm and used M3 screw with nut to hold the amp IC.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-4 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" data-id=\"201\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0098.jpg\" alt=\"\" class=\"wp-image-201\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0098.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0098-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0098-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0098-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0098-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" data-id=\"202\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0099.jpg\" alt=\"\" class=\"wp-image-202\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0099.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0099-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0099-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0099-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0099-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n<\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1350\" height=\"1800\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0094.jpg\" alt=\"\" class=\"wp-image-203\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0094.jpg 1350w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0094-540x720.jpg 540w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0094-192x256.jpg 192w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0094-768x1024.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0094-1152x1536.jpg 1152w\" sizes=\"auto, (max-width: 1350px) 100vw, 1350px\" \/><\/figure>\n\n\n<h2 class=\"wp-block-heading\" id=\"%25e4%25bf%25ae%25e7%2590%2586xlr%25e8%25bf%259e%25e6%258e%25a5%25e5%2599%25a8-repair-xlr-connector\">\u4fee\u7406XLR\u8fde\u63a5\u5668 \/ Repair XLR Connector<\/h2>\n\n\n<p>\u4e00\u4e2a\u529f\u653e\u677f\u7684XLR\u8f93\u5165\u8fde\u63a5\u5668\u7f3a\u5c11\u4e00\u4e2a\u9762\u677f\uff0c\u6211\u753b\u4e86\u4e00\u4e2a\uff0c3D\u6253\u5370\u51fa\u6765\uff0c\u5e76\u7528\u5f3a\u529b\u80f6\u7c98\u4e0a\u3002<\/p>\n\n\n\n<p>One of the amp is missing a plate on the XLR connector, I designed one, printed with my Ender-3 3D-printer and superglued it in place.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0120.jpg\" alt=\"\" class=\"wp-image-204\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0120.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0120-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0120-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0120-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0120-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-5 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" data-id=\"205\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0122.jpg\" alt=\"\" class=\"wp-image-205\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0122.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0122-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0122-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0122-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0122-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" data-id=\"206\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0123.jpg\" alt=\"\" class=\"wp-image-206\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0123.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0123-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0123-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0123-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0123-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" data-id=\"207\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0124.jpg\" alt=\"\" class=\"wp-image-207\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0124.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0124-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0124-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0124-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0124-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n<\/figure>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-6 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" data-id=\"210\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/20220319_190924.jpg\" alt=\"\" class=\"wp-image-210\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/20220319_190924.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/20220319_190924-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/20220319_190924-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/20220319_190924-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/20220319_190924-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" data-id=\"211\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/20220319_190957.jpg\" alt=\"\" class=\"wp-image-211\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/20220319_190957.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/20220319_190957-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/20220319_190957-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/20220319_190957-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/20220319_190957-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n<\/figure>\n\n\n<h1 class=\"wp-block-heading\" id=\"%25e7%25ae%25b1%25e4%25bd%2593%25e7%25bb%25b4%25e4%25bf%25ae-cabinet-repair\">\u7bb1\u4f53\u7ef4\u4fee \/ Cabinet repair<\/h1>\n\n\n<p>\u4e00\u53ea\u7bb1\u4f53\u53d7\u5230\u4e86\u6c34\u6d78\u635f\u574f\uff0c\u8fd8\u597d\u5185\u90e8\u63a5\u7f1d\u5e76\u6ca1\u6709\u88c2\u5f00\u3002\u6211\u5148\u7528\u65cb\u8f6c\u9509\u79fb\u9664\u6240\u6709\u677e\u6563\u7684\u6728\u5934\u3002<\/p>\n\n\n\n<p>One cabinet suffered water damage, luckily the seam on the inside is still intact. I first remove all loose MDF that has been soaked.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-7 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1350\" height=\"1800\" data-id=\"212\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0048.jpg\" alt=\"\" class=\"wp-image-212\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0048.jpg 1350w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0048-540x720.jpg 540w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0048-192x256.jpg 192w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0048-768x1024.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0048-1152x1536.jpg 1152w\" sizes=\"auto, (max-width: 1350px) 100vw, 1350px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1350\" height=\"1800\" data-id=\"213\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0049.jpg\" alt=\"\" class=\"wp-image-213\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0049.jpg 1350w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0049-540x720.jpg 540w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0049-192x256.jpg 192w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0049-768x1024.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0049-1152x1536.jpg 1152w\" sizes=\"auto, (max-width: 1350px) 100vw, 1350px\" \/><\/figure>\n<\/figure>\n\n\n\n<p>\u7528\u73af\u6c27\u6811\u8102\u7a33\u5b9a\u754c\u9762<\/p>\n\n\n\n<p>Stabilize the surface with epoxy<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-8 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" data-id=\"214\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0053.jpg\" alt=\"\" class=\"wp-image-214\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0053.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0053-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0053-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0053-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0053-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1350\" height=\"1800\" data-id=\"215\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0054.jpg\" alt=\"\" class=\"wp-image-215\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0054.jpg 1350w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0054-540x720.jpg 540w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0054-192x256.jpg 192w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0054-768x1024.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0054-1152x1536.jpg 1152w\" sizes=\"auto, (max-width: 1350px) 100vw, 1350px\" \/><\/figure>\n<\/figure>\n\n\n\n<p>3D\u6253\u5370\u80cc\u677f\u6765\u8f85\u52a9\u91cd\u505a\u5916\u5f62<\/p>\n\n\n\n<p>I 3D printed a mock back panel to help with reconstruction<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0050.jpg\" alt=\"\" class=\"wp-image-216\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0050.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0050-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0050-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0050-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0050-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n\n\n\n<p>\u7528\u73af\u6c27\u6811\u8102\u52a0\u6728\u7c89\u91cd\u65b0\u505a\u51fa\u5916\u5f62<\/p>\n\n\n\n<p>Reconstruct the cabinet using epoxy with wood flour<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-9 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1350\" height=\"1800\" data-id=\"220\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0066.jpg\" alt=\"\" class=\"wp-image-220\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0066.jpg 1350w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0066-540x720.jpg 540w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0066-192x256.jpg 192w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0066-768x1024.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0066-1152x1536.jpg 1152w\" sizes=\"auto, (max-width: 1350px) 100vw, 1350px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1350\" height=\"1800\" data-id=\"217\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0067.jpg\" alt=\"\" class=\"wp-image-217\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0067.jpg 1350w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0067-540x720.jpg 540w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0067-192x256.jpg 192w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0067-768x1024.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0067-1152x1536.jpg 1152w\" sizes=\"auto, (max-width: 1350px) 100vw, 1350px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1350\" height=\"1800\" data-id=\"218\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0068.jpg\" alt=\"\" class=\"wp-image-218\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0068.jpg 1350w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0068-540x720.jpg 540w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0068-192x256.jpg 192w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0068-768x1024.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0068-1152x1536.jpg 1152w\" sizes=\"auto, (max-width: 1350px) 100vw, 1350px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" data-id=\"219\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0069.jpg\" alt=\"\" class=\"wp-image-219\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0069.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0069-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0069-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0069-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0069-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><figcaption class=\"wp-element-caption\">This just shows the consistency of the paste<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<p>\u52a0\u7b80\u6613\u7684\u6a21\u677f\u56fa\u5b9a<\/p>\n\n\n\n<p>Fix everything in place with some makeshift mold<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0111.jpg\" alt=\"\" class=\"wp-image-221\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0111.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0111-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0111-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0111-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0111-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n\n\n\n<p>\u7b2c\u4e00\u6b21\u6d47\u6ce8\u7ed3\u679c\u4e0d\u662f\u5f88\u5b8c\u7f8e\uff0c\u8fd8\u9700\u8981\u518d\u6765\u4e00\u8f6e<\/p>\n\n\n\n<p>First try yielded some cavities, so another round was required<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1350\" height=\"1800\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0097.jpg\" alt=\"\" class=\"wp-image-222\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0097.jpg 1350w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0097-540x720.jpg 540w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0097-192x256.jpg 192w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0097-768x1024.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0097-1152x1536.jpg 1152w\" sizes=\"auto, (max-width: 1350px) 100vw, 1350px\" \/><\/figure>\n\n\n\n<p>\u73af\u6c27\u5e72\u4e86\u4e4b\u540e\u8fdb\u884c\u6253\u78e8\u3002\u6253\u78e8\u65f6\u4e3a\u4e86\u5feb\u901f\u4fee\u8865\u4e0d\u9700\u8981\u7b4948\u5c0f\u65f6\u6765\u8ba9\u73af\u6c27\u56fa\u5316\uff0c\u7528502\u52a0\u6728\u7c89\u4fee\u8865\u4e86\u4e00\u4e9b\u5730\u65b9\u3002<\/p>\n\n\n\n<p>I sanded it down&nbsp;after epoxy has cured. To fix some mistakes I used superglue and wood flour to avoid having to wait another 48 hours for epoxy to cure.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-10 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" data-id=\"224\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0113.jpg\" alt=\"\" class=\"wp-image-224\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0113.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0113-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0113-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0113-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0113-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" data-id=\"223\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0125.jpg\" alt=\"\" class=\"wp-image-223\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0125.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0125-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0125-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0125-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0125-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n<\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0126.jpg\" alt=\"\" class=\"wp-image-225\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0126.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0126-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0126-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0126-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0126-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n\n\n\n<p>\u91cd\u65b0\u8d34\u76ae<\/p>\n\n\n\n<p>Re-apply vinyl<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-11 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" data-id=\"226\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0127.jpg\" alt=\"\" class=\"wp-image-226\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0127.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0127-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0127-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0127-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0127-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" data-id=\"227\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0131.jpg\" alt=\"\" class=\"wp-image-227\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0131.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0131-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0131-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0131-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0131-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n<\/figure>\n\n\n<h1 class=\"wp-block-heading\" id=\"%25e5%2596%2587%25e5%258f%25ad%25e5%258d%2595%25e5%2585%2583%25e7%25bb%25b4%25e4%25bf%25ae-speaker-driver-repair\">\u5587\u53ed\u5355\u5143\u7ef4\u4fee \/ Speaker Driver Repair<\/h1>\n\n<h2 class=\"wp-block-heading\" id=\"%25e9%25ab%2598%25e9%259f%25b3%25e6%259b%25b4%25e6%258d%25a2%25e7%25a3%2581%25e6%25b6%25b2-replace-ferrofluid-in-tweeters\">\u9ad8\u97f3\u66f4\u6362\u78c1\u6db2 \/ Replace Ferrofluid in Tweeters<\/h2>\n\n\n<p>\u6211\u4ece\u6dd8\u5b9d\u8ba2\u8d2d\u4e86\u4f4e\u7c98\u5ea6\u7684APG L11\u78c1\u6db2\u3002\u66f4\u6362\u78c1\u6db2\u65f6\u8981\u62c6\u5f00\u9ad8\u97f3\u5355\u5143\uff0c\u6e05\u9664\u6240\u6709\u4e4b\u524d\u7684\u78c1\u6db2\uff0c\u52a0\u5165\u65b0\u7684\u78c1\u6db2\u3002\u6bcf\u4e2a\u5355\u5143\u6211\u52a0\u4e86\u5927\u7ea6100uL\uff0c\u4e5f\u5c31\u662f0.1\u6beb\u5347\u3002\u66f4\u6362\u53c2\u8003\u4e86\u8fd9\u4e2a\u94fe\u63a5\uff1a<a href=\"https:\/\/speakerrepairshop.nl\/en\/instructions\/replace-ferrofluid-in-tweeter\/c-36\">https:\/\/speakerrepairshop.nl\/en\/instructions\/replace-ferrofluid-in-tweeter\/c-36<\/a><\/p>\n\n\n\n<p>I ordered a small amount&nbsp;of APG L11 low viscousity ferrofluid. To replace FF in a tweeter, you take it apart, remove all old residues and put in new FF. I ended up putting about 100 micro-liter of FF into each tweeter. Reference:&nbsp;<a href=\"https:\/\/speakerrepairshop.nl\/en\/instructions\/replace-ferrofluid-in-tweeter\/c-36\">https:\/\/speakerrepairshop.nl\/en\/instructions\/replace-ferrofluid-in-tweeter\/c-36<\/a><\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-12 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1350\" height=\"1800\" data-id=\"230\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0059.jpg\" alt=\"\" class=\"wp-image-230\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0059.jpg 1350w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0059-540x720.jpg 540w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0059-192x256.jpg 192w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0059-768x1024.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0059-1152x1536.jpg 1152w\" sizes=\"auto, (max-width: 1350px) 100vw, 1350px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1350\" height=\"1800\" data-id=\"228\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0060.jpg\" alt=\"\" class=\"wp-image-228\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0060.jpg 1350w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0060-540x720.jpg 540w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0060-192x256.jpg 192w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0060-768x1024.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0060-1152x1536.jpg 1152w\" sizes=\"auto, (max-width: 1350px) 100vw, 1350px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1350\" height=\"1800\" data-id=\"229\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0061.jpg\" alt=\"\" class=\"wp-image-229\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0061.jpg 1350w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0061-540x720.jpg 540w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0061-192x256.jpg 192w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0061-768x1024.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0061-1152x1536.jpg 1152w\" sizes=\"auto, (max-width: 1350px) 100vw, 1350px\" \/><\/figure>\n<\/figure>\n\n\n\n<p>\u52a0\u78c1\u6db2\u65f6\uff0c\u78c1\u6db2\u4f1a\u88ab\u81ea\u52a8\u5438\u8fdb\u6c14\u9699\u91cc\u3002\u8fd9\u662f\u52a0\u78c1\u6db2\u7684\u793a\u610f\u56fe\u3002<\/p>\n\n\n\n<p>When adding FF,&nbsp;it&nbsp;will be attracted into the air gaps automatically. This is what it looks like without any FF in the syringe.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-13 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" data-id=\"232\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0062.jpg\" alt=\"\" class=\"wp-image-232\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0062.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0062-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0062-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0062-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0062-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1350\" height=\"1800\" data-id=\"231\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0063.jpg\" alt=\"\" class=\"wp-image-231\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0063.jpg 1350w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0063-540x720.jpg 540w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0063-192x256.jpg 192w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0063-768x1024.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0063-1152x1536.jpg 1152w\" sizes=\"auto, (max-width: 1350px) 100vw, 1350px\" \/><\/figure>\n<\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0064.jpg\" alt=\"\" class=\"wp-image-233\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0064.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0064-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0064-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0064-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0064-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n\n\n<h1 class=\"wp-block-heading\" id=\"%25e7%25bb%2584%25e8%25a3%2585-reassembling\">\u7ec4\u88c5 \/ Reassembling<\/h1>\n\n\n<p>\u7535\u8def\u677f\u70e7\u6bc1\u7684\u90a3\u4e00\u53ea\u5185\u90e8\u7684\u5438\u97f3\u68c9\u88ab\u70b9\u71c3\u70e7\u6389\u4e86\u4e00\u4e9b\uff0c\u53e6\u4e00\u53ea\u662f\u7bb1\u4f53\u53d7\u635f\u64cd\u4f5c\u4e2d\u4e5f\u79fb\u9664\u4e86\u5438\u97f3\u68c9\uff0c\u6240\u4ee5\u4e24\u53ea\u90fd\u66f4\u6362\u4e86\u65b0\u7684\u5438\u97f3\u68c9\u3002<\/p>\n\n\n\n<p>The polyfill in the speaker which has bad PSU was ignited when the PSU exploded. The other one has its polyfill removed during repairing of the cabinet. So both speakers were installed with new acoustic material.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0103.jpg\" alt=\"\" class=\"wp-image-235\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0103.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0103-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0103-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0103-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0103-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-14 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" data-id=\"236\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0128.jpg\" alt=\"\" class=\"wp-image-236\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0128.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0128-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0128-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0128-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0128-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" data-id=\"237\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0129.jpg\" alt=\"\" class=\"wp-image-237\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0129.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0129-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0129-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0129-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0129-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" data-id=\"238\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0130.jpg\" alt=\"\" class=\"wp-image-238\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0130.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0130-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0130-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0130-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0130-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n<\/figure>\n\n\n\n<p>\u63a5\u4e0b\u6765\u5c06\u5185\u90e8\u7684\u7ebf\u5305\u88f9\u597d\uff0c\u63a5\u597d\u529f\u653e\u677f\uff0c\u5c06\u80cc\u677f\u88c5\u56de\uff0c\u5728\u5e95\u90e8\u7c98\u4e0aEVA\u51cf\u9707\u57ab\u7ef4\u4fee\u5c31\u5168\u90e8\u5b8c\u6210\u4e86\u3002\u529f\u653e\u5355\u5143\u7528\u4e86\u65b0\u87ba\u4e1d\u6765\u56fa\u5b9a\uff0c\u56e0\u4e3a\u65e7\u7684\u7f3a\u5931\u4e86\u4e00\u4e9b\u3002<\/p>\n\n\n\n<p>Next is to wrap the wires inside the speakers, connect the amp, reinstall the back plate, put on EVA shock absorbing pads on the bottom side and that concluded all of the repair. New screws were used to mount the amp units as some were missing.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-15 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1350\" height=\"1800\" data-id=\"239\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0104.jpg\" alt=\"\" class=\"wp-image-239\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0104.jpg 1350w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0104-540x720.jpg 540w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0104-192x256.jpg 192w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0104-768x1024.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0104-1152x1536.jpg 1152w\" sizes=\"auto, (max-width: 1350px) 100vw, 1350px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1350\" height=\"1800\" data-id=\"241\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0105.jpg\" alt=\"\" class=\"wp-image-241\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0105.jpg 1350w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0105-540x720.jpg 540w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0105-192x256.jpg 192w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0105-768x1024.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0105-1152x1536.jpg 1152w\" sizes=\"auto, (max-width: 1350px) 100vw, 1350px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" data-id=\"240\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0107.jpg\" alt=\"\" class=\"wp-image-240\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0107.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0107-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0107-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0107-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0107-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n<\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0131-1.jpg\" alt=\"\" class=\"wp-image-242\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0131-1.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0131-1-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0131-1-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0131-1-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0131-1-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1350\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0135.jpg\" alt=\"\" class=\"wp-image-243\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0135.jpg 1800w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0135-720x540.jpg 720w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0135-256x192.jpg 256w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0135-768x576.jpg 768w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2022\/07\/DSC_0135-1536x1152.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n\n\n\n<p>\u662f\u7684\uff0c\u5012\u76f8\u5b54\u91cc\u662f\u889c\u5b50<\/p>\n\n\n\n<p>And yes, socks in the ports.<\/p>\n\n\n<h1 class=\"wp-block-heading\" id=\"%25e4%25bd%25bf%25e7%2594%25a8%25e4%25bd%2593%25e9%25aa%258c-experience-using-the-speakers\">\u4f7f\u7528\u4f53\u9a8c \/ Experience Using the Speakers<\/h1>\n\n\n<p>\u5230\u76ee\u524d\u4e3a\u6b62\u5df2\u7ecf\u4f7f\u7528\u56db\u4e2a\u6708\u4e86\uff0c\u6ca1\u6709\u4efb\u4f55\u95ee\u9898\u3002\u8fd9\u5bf9\u97f3\u7bb1\u58f0\u97f3\u6bd4\u8f83\u5747\u8861\uff0c\u4f4e\u97f3\u5bf9\u4e8e6.5\u5bf8\u97f3\u7bb1\u6765\u8bf4\u975e\u5e38\u5145\u8db3\u4e86\u3002<\/p>\n\n\n\n<p>It has been 4 months after the repair, and there isn&#8217;t any problem. The sound of these speakers are well balanced, and bass content is very adequate for a woofer of this size.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Repairing a pair of classic Alesis monitor speakers \u7ef4\u4fee\u4e00\u5bf9\u7ecf\u5178\u7684Alesis\u76d1\u542c\u97f3\u7bb1<\/p>\n","protected":false},"author":1,"featured_media":193,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[7,23,12,10],"class_list":["post-177","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tech","tag-hw","tag-pcb","tag-repair","tag-writeup"],"_links":{"self":[{"href":"https:\/\/www.ddzheng.cc\/index.php?rest_route=\/wp\/v2\/posts\/177","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ddzheng.cc\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ddzheng.cc\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ddzheng.cc\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ddzheng.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=177"}],"version-history":[{"count":11,"href":"https:\/\/www.ddzheng.cc\/index.php?rest_route=\/wp\/v2\/posts\/177\/revisions"}],"predecessor-version":[{"id":367,"href":"https:\/\/www.ddzheng.cc\/index.php?rest_route=\/wp\/v2\/posts\/177\/revisions\/367"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ddzheng.cc\/index.php?rest_route=\/wp\/v2\/media\/193"}],"wp:attachment":[{"href":"https:\/\/www.ddzheng.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=177"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ddzheng.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=177"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ddzheng.cc\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=177"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}