{"id":282,"date":"2015-08-27T14:10:00","date_gmt":"2015-08-27T14:10:00","guid":{"rendered":"http:\/\/machineryequipmentonline.com\/video-equipment\/uncategorized\/test-equipment-and-fault-diagnosispcb-practicalities\/"},"modified":"2015-08-27T14:10:00","modified_gmt":"2015-08-27T14:10:00","slug":"test-equipment-and-fault-diagnosispcb-practicalities","status":"publish","type":"post","link":"http:\/\/machineryequipmentonline.com\/video-equipment\/test-equipment-and-fault-diagnosispcb-practicalities\/","title":{"rendered":"TEST EQUIPMENT AND FAULT DIAGNOSIS:PCB PRACTICALITIES."},"content":{"rendered":"<div class=\"fxdso6a0dc8502531d\" ><script type=\"text\/javascript\">\n\tatOptions = {\n\t\t'key' : '61e5902552e2353963d8d2f1bd1f4a8f',\n\t\t'format' : 'iframe',\n\t\t'height' : 250,\n\t\t'width' : 300,\n\t\t'params' : {}\n\t};\n<\/script>\n<script type=\"text\/javascript\" src=\"\/\/www.highperformanceformat.com\/61e5902552e2353963d8d2f1bd1f4a8f\/invoke.js\"><\/script><\/div><style type=\"text\/css\">\r\n@media screen and (min-width: 1201px) {\r\n.fxdso6a0dc8502531d {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 993px) and (max-width: 1200px) {\r\n.fxdso6a0dc8502531d {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 769px) and (max-width: 992px) {\r\n.fxdso6a0dc8502531d {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 768px) and (max-width: 768px) {\r\n.fxdso6a0dc8502531d {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (max-width: 767px) {\r\n.fxdso6a0dc8502531d {\r\ndisplay: block;\r\n}\r\n}\r\n<\/style>\r\n<h3 align=\"justify\">PCB PRACTICALITIES<\/h3>\n<p align=\"justify\">The second aspect of service after fault diagnosis is repair and component replacement. Ease of repair and access varies enormously between different make, type and vintage of equipment. Unsoldering of PCB-mounted components, especially multi-legged  <\/p>\n<p align=\"justify\">types, is most easily done with a small hot soldering iron and commercially prepared desoldering wick, which consists of resin- impregnated copper braid to absorb old solder as it is melted. A useful alternative, especially for use with double-sided and plated- through-hole boards, is the solder pump, a spring-loaded vacuum device; the most effective is the type in which it is combined with a mains desoldering iron whose bit is made in the form of a hollow nozzle.  <\/p><div class=\"lbezi6a0dc85025426\" ><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-0778475562755157\"\n     crossorigin=\"anonymous\"><\/script>\n<!-- 300x600 television-and-video -->\n<ins class=\"adsbygoogle\"\n     style=\"display:inline-block;width:300px;height:600px\"\n     data-ad-client=\"ca-pub-0778475562755157\"\n     data-ad-slot=\"6549443290\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/div><style type=\"text\/css\">\r\n@media screen and (min-width: 1201px) {\r\n.lbezi6a0dc85025426 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 993px) and (max-width: 1200px) {\r\n.lbezi6a0dc85025426 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 769px) and (max-width: 992px) {\r\n.lbezi6a0dc85025426 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 768px) and (max-width: 768px) {\r\n.lbezi6a0dc85025426 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (max-width: 767px) {\r\n.lbezi6a0dc85025426 {\r\ndisplay: block;\r\n}\r\n}\r\n<\/style>\r\n<div class=\"ktgiy6a0dc850253ab\" ><script type=\"text\/javascript\">\n\tatOptions = {\n\t\t'key' : '0c1eb4c533eaedb7b996f49a5a4983a9',\n\t\t'format' : 'iframe',\n\t\t'height' : 300,\n\t\t'width' : 160,\n\t\t'params' : {}\n\t};\n<\/script>\n<script type=\"text\/javascript\" src=\"\/\/www.highperformanceformat.com\/0c1eb4c533eaedb7b996f49a5a4983a9\/invoke.js\"><\/script><\/div><style type=\"text\/css\">\r\n@media screen and (min-width: 1201px) {\r\n.ktgiy6a0dc850253ab {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 993px) and (max-width: 1200px) {\r\n.ktgiy6a0dc850253ab {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 769px) and (max-width: 992px) {\r\n.ktgiy6a0dc850253ab {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 768px) and (max-width: 768px) {\r\n.ktgiy6a0dc850253ab {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (max-width: 767px) {\r\n.ktgiy6a0dc850253ab {\r\ndisplay: block;\r\n}\r\n}\r\n<\/style>\r\n\n<p align=\"justify\">The very tightly packed double-sided PCBs used in cameras, cam- corders and portable videorecorders are the most difficult to deal with \u2013 see Fig. 1.3. Many of their components are SMD (Surface- Mounting-Device) types, which are soldered direct to the print panel on both sides of the board. These pinhead-size transistors, resistors, links and capacitors are glued to the board surface in manufacture, then soldered to the print in a bath-wave operation. To remove them, one or more small hot soldering irons are required to simultaneously release all connections. For multi-legged SMDs like miniature ICs it is usually necessary to use a specially designed desoldering station with hot-air blower and heat shields for both de-soldering and subsequent \ufb01tting of the replacement chip. It is important to be sure of the diagnosis before changing components on these high-density assemblies, and to closely consult the manufacturer\u2019s service information in all cases.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PCB PRACTICALITIES The second aspect of service after fault diagnosis is repair and component replacement. Ease of repair and access varies enormously between different make, type and vintage of equipment. Unsoldering of PCB-mounted components, especially multi-legged types, is most easily done with a small hot soldering iron and commercially prepared desoldering wick, which consists of [&hellip;]<br \/><a href=\"http:\/\/machineryequipmentonline.com\/video-equipment\/test-equipment-and-fault-diagnosispcb-practicalities\/\" class=\"more-link\" >Continue reading&#8230;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"aioseo_notices":[],"views":566,"_links":{"self":[{"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/posts\/282"}],"collection":[{"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/comments?post=282"}],"version-history":[{"count":0,"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/posts\/282\/revisions"}],"wp:attachment":[{"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/media?parent=282"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/categories?post=282"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/tags?post=282"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}