{"id":149,"date":"2015-09-01T15:32:00","date_gmt":"2015-09-01T15:32:00","guid":{"rendered":"http:\/\/machineryequipmentonline.com\/video-equipment\/uncategorized\/flat-panel-television-receiversfault-finding-in-an-lcd-television-receiver\/"},"modified":"2015-09-01T15:32:00","modified_gmt":"2015-09-01T15:32:00","slug":"flat-panel-television-receiversfault-finding-in-an-lcd-television-receiver","status":"publish","type":"post","link":"http:\/\/machineryequipmentonline.com\/video-equipment\/flat-panel-television-receiversfault-finding-in-an-lcd-television-receiver\/","title":{"rendered":"Flat panel television receivers:Fault finding in an LCD television receiver"},"content":{"rendered":"<div class=\"oqtpr6a0dc83de0b79\" ><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.oqtpr6a0dc83de0b79 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 993px) and (max-width: 1200px) {\r\n.oqtpr6a0dc83de0b79 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 769px) and (max-width: 992px) {\r\n.oqtpr6a0dc83de0b79 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 768px) and (max-width: 768px) {\r\n.oqtpr6a0dc83de0b79 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (max-width: 767px) {\r\n.oqtpr6a0dc83de0b79 {\r\ndisplay: block;\r\n}\r\n}\r\n<\/style>\r\n<h3 align=\"justify\">Fault finding in an LCD television receiver<\/h3>\n<p align=\"justify\">Fault-finding procedure for LCD receivers follows closely that described for plasma panels.  <\/p>\n<p align=\"justify\">Figure 16.33 shows the components parts of an LCD TV receiver. The start-up sequence is the same as that for plasma screens except for the absence of the resonant converter supplying the sustain voltage.  <\/p>\n<p align=\"justify\"><a href=\"http:\/\/lh3.googleusercontent.com\/-ZBDSCuFXEfw\/VeXE6rXMXRI\/AAAAAAAB6HU\/SJfWSg2PFLE\/s1600-h\/Television-and-Video-Technology-0059%25255B1%25255D.jpg\"><img decoding=\"async\" loading=\"lazy\" style=\"background-image: none; border-right-width: 0px; margin: 0px auto; padding-left: 0px; padding-right: 0px; display: block; float: none; border-top-width: 0px; border-bottom-width: 0px; border-left-width: 0px; padding-top: 0px\" title=\"Television and Video Technology-0059\" border=\"0\" alt=\"Television and Video Technology-0059\" src=\"http:\/\/lh3.googleusercontent.com\/-FhkG1BRNjD8\/VeXE8ameukI\/AAAAAAAB6Hc\/bVOcIUvUC7s\/Television-and-Video-Technology-0059.jpg?imgmax=800\" width=\"413\" height=\"321\" \/><\/a>  <\/p>\n<p align=\"justify\">For LCD panels, a similar fault diagnosis procedure may be followed:  <\/p>\n<blockquote>\n<p align=\"justify\">\u25cf Is the set in Standby?,  <\/p>\n<p align=\"justify\">\u25cf Check DC outputs,  <\/p><div class=\"olgsc6a0dc83de0c87\" ><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.olgsc6a0dc83de0c87 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 993px) and (max-width: 1200px) {\r\n.olgsc6a0dc83de0c87 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 769px) and (max-width: 992px) {\r\n.olgsc6a0dc83de0c87 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 768px) and (max-width: 768px) {\r\n.olgsc6a0dc83de0c87 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (max-width: 767px) {\r\n.olgsc6a0dc83de0c87 {\r\ndisplay: block;\r\n}\r\n}\r\n<\/style>\r\n<div class=\"rptiw6a0dc83de0c0a\" ><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.rptiw6a0dc83de0c0a {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 993px) and (max-width: 1200px) {\r\n.rptiw6a0dc83de0c0a {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 769px) and (max-width: 992px) {\r\n.rptiw6a0dc83de0c0a {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 768px) and (max-width: 768px) {\r\n.rptiw6a0dc83de0c0a {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (max-width: 767px) {\r\n.rptiw6a0dc83de0c0a {\r\ndisplay: block;\r\n}\r\n}\r\n<\/style>\r\n\n<p align=\"justify\">\u25cf Check voltage from Flyback switch,  <\/p>\n<p align=\"justify\">\u25cf Check backlight drive voltage by placing a CRO probe in the proximity of the CCF tube step-up transformer. A sine wave signal should be picked with a frequency in the region of 50 kHz,<\/p>\n<\/blockquote>\n<blockquote>\n<p align=\"justify\">\u25cf Check the PWM tube brightness control pulse using a CRO or a logic probe,  <\/p>\n<p align=\"justify\">\u25cf Check the inverter oscillator DC supply,  <\/p>\n<p align=\"justify\">\u25cf Check inverter oscillator output.<\/p>\n<\/blockquote>\n<p align=\"justify\">PFC is not shown, although many large screens would incorporate it in their power distribution network.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Fault finding in an LCD television receiver Fault-finding procedure for LCD receivers follows closely that described for plasma panels. Figure 16.33 shows the components parts of an LCD TV receiver. The start-up sequence is the same as that for plasma screens except for the absence of the resonant converter supplying the sustain voltage. For LCD [&hellip;]<br \/><a href=\"http:\/\/machineryequipmentonline.com\/video-equipment\/flat-panel-television-receiversfault-finding-in-an-lcd-television-receiver\/\" 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":1255,"_links":{"self":[{"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/posts\/149"}],"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=149"}],"version-history":[{"count":0,"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/posts\/149\/revisions"}],"wp:attachment":[{"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/media?parent=149"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/categories?post=149"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/tags?post=149"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}