{"id":163,"date":"2021-09-29T12:04:33","date_gmt":"2021-09-29T16:04:33","guid":{"rendered":"https:\/\/aervblog.com\/?p=163"},"modified":"2021-09-29T12:04:33","modified_gmt":"2021-09-29T16:04:33","slug":"symetrix-528e-design-error-that-causes-power-supply-short","status":"publish","type":"post","link":"https:\/\/aervblog.com\/index.php\/2021\/09\/29\/symetrix-528e-design-error-that-causes-power-supply-short\/","title":{"rendered":"Symetrix 528E design error that causes power supply short."},"content":{"rendered":"\n<p>I have received several Symetrix 528E mic processors that have had intermittent shorts pop up. After a little tracing I was able to find the culprit. On the LED display board there are 4 black screws. They are all the same and they all have captured lock washers. Three of these screws are fine but there is one left center that will give you fits if you do not know about it. In the picture below you can see where the screw goes and how close the traces are to the hole. When you screw down the thing the lock washer will eventually bite into the traces and short out the 15 volt supply. <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/aervblog.com\/wp-content\/uploads\/2021\/09\/528Eiso2-1024x576.jpg\" alt=\"\" class=\"wp-image-165\" srcset=\"https:\/\/aervblog.com\/wp-content\/uploads\/2021\/09\/528Eiso2-1024x576.jpg 1024w, https:\/\/aervblog.com\/wp-content\/uploads\/2021\/09\/528Eiso2-300x169.jpg 300w, https:\/\/aervblog.com\/wp-content\/uploads\/2021\/09\/528Eiso2-768x432.jpg 768w, https:\/\/aervblog.com\/wp-content\/uploads\/2021\/09\/528Eiso2-1536x864.jpg 1536w, https:\/\/aervblog.com\/wp-content\/uploads\/2021\/09\/528Eiso2-2048x1152.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>On some of the newer versions there is a plastic screw in this hole but most of the time there is just a normal metal screw. I have been putting a fiber washer under the screw and have not had any problems or returns since. I don&#8217;t crank down on this screw since there are 3 more holding the board down and it does not need it to be too tight. <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/aervblog.com\/wp-content\/uploads\/2021\/09\/528eiso1-1-1024x576.jpg\" alt=\"\" class=\"wp-image-166\" srcset=\"https:\/\/aervblog.com\/wp-content\/uploads\/2021\/09\/528eiso1-1-1024x576.jpg 1024w, https:\/\/aervblog.com\/wp-content\/uploads\/2021\/09\/528eiso1-1-300x169.jpg 300w, https:\/\/aervblog.com\/wp-content\/uploads\/2021\/09\/528eiso1-1-768x432.jpg 768w, https:\/\/aervblog.com\/wp-content\/uploads\/2021\/09\/528eiso1-1-1536x864.jpg 1536w, https:\/\/aervblog.com\/wp-content\/uploads\/2021\/09\/528eiso1-1-2048x1152.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Just a quick tip for you to keep in mind if you ever get to work on one of these.<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Quick repair tips and tricks<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":""},"categories":[14],"tags":[12,13],"class_list":["post-163","post","type-post","status-publish","format-standard","hentry","category-quick-fixes","tag-repair","tag-tips"],"_links":{"self":[{"href":"https:\/\/aervblog.com\/index.php\/wp-json\/wp\/v2\/posts\/163","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aervblog.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aervblog.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aervblog.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aervblog.com\/index.php\/wp-json\/wp\/v2\/comments?post=163"}],"version-history":[{"count":1,"href":"https:\/\/aervblog.com\/index.php\/wp-json\/wp\/v2\/posts\/163\/revisions"}],"predecessor-version":[{"id":167,"href":"https:\/\/aervblog.com\/index.php\/wp-json\/wp\/v2\/posts\/163\/revisions\/167"}],"wp:attachment":[{"href":"https:\/\/aervblog.com\/index.php\/wp-json\/wp\/v2\/media?parent=163"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aervblog.com\/index.php\/wp-json\/wp\/v2\/categories?post=163"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aervblog.com\/index.php\/wp-json\/wp\/v2\/tags?post=163"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}