{"id":1295,"date":"2017-02-04T14:46:19","date_gmt":"2017-02-04T22:46:19","guid":{"rendered":"https:\/\/www.ussherpress.com\/blog\/?p=1295"},"modified":"2017-03-08T19:56:12","modified_gmt":"2017-03-09T03:56:12","slug":"re-capping-a-commodore-1702-monitor","status":"publish","type":"post","link":"https:\/\/www.ussherpress.com\/blog\/?p=1295","title":{"rendered":"Re-capping a Commodore 1702 monitor"},"content":{"rendered":"<p>I&#8217;ve got a Commodore 1702 monitor and it&#8217;s been flickering a lot lately. It&#8217;s high time for a re-cap. I&#8217;ve got a cap kit and am ready to go.<\/p>\n<p>I opened it up and this is what it looks like on the inside. Note: it has a lot of capacitors, so I&#8217;ll have to do this over several sessions as soldering is a laborious process. \ud83d\ude41<\/p>\n<p><a href=\"https:\/\/www.ussherpress.com\/blog\/?attachment_id=1296\" rel=\"attachment wp-att-1296\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-1296\" src=\"https:\/\/www.ussherpress.com\/blog\/wp-content\/uploads\/C32q-HvUcAEeC1K.jpg\" alt=\"c32q-hvucaeec1k\" width=\"768\" height=\"1024\" srcset=\"https:\/\/www.ussherpress.com\/blog\/wp-content\/uploads\/C32q-HvUcAEeC1K.jpg 768w, https:\/\/www.ussherpress.com\/blog\/wp-content\/uploads\/C32q-HvUcAEeC1K-580x773.jpg 580w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/a><\/p>\n<p>If you&#8217;re doing a re-cap of a 1702, <a href=\"https:\/\/console5.com\/wiki\/Commodore_1702\">here&#8217;s a good diagram of all the capacitors<\/a>. I bought my <a href=\"https:\/\/console5.com\/store\/commodore-1702-cap-kit.html\">cap kit from Console5<\/a>.<\/p>\n<p>Some quick notes about opening up the Commodore 1702:<\/p>\n<ul>\n<li>There a bunch of screws in the back. After unscrewing all of them (including the ones near the rear inputs), store them all together somewhere. They&#8217;re all the same.<\/li>\n<li>There are three screws in the front. Store these together. They&#8217;re different from the back ones.<\/li>\n<li>Pull apart the front and back plastic frame carefully.<\/li>\n<li>Next, discharge the cathode ray tube for safety. Please look up how to do this online. It&#8217;s very important as you don&#8217;t want to zap yourself. The CRT can store thousands of volts even when unplugged!<\/li>\n<li>After discharging the CRT, slowly pull the CRT neck PCB off the neck tube. You&#8217;ll need to slowly wiggle it backwards to get it off.<\/li>\n<li>Remove the flyback transformer &#8220;suction cup&#8221; from the top of the CRT.<\/li>\n<li>Unplug the ground\u00a0wire\u00a0from the neck PCB.<\/li>\n<li>Unplug the speaker wires.<\/li>\n<li>Unplug the three-wire input (sorry, don&#8217;t know the term for this) coming from the CRT into the main\u00a0chassis PCB.<\/li>\n<li>Unplug the two-wire input input (don&#8217;t know this term either) from the CRT going into the main chassis PCB.<\/li>\n<\/ul>\n<p>After doing the above, you can separate the chassis PCB from the CRT itself. This is what you see in the picture above.<\/p>\n<p>For me, the next step is to de-solder, remove, and replace each capacitor from all the boards. I&#8217;ll do this one by one so I don&#8217;t get lost. (Removing all of them at once would\u00a0lead to confusion when replacing them. I&#8217;d have to constantly look at the diagram!) I&#8217;m not sure yet if it&#8217;s better to unscrew the chassis PCB from the frame or if I can just work on it directly. We&#8217;ll see.<\/p>\n<p>More updates coming soon!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I&#8217;ve got a Commodore 1702 monitor and it&#8217;s been flickering a lot lately. It&#8217;s high time for a re-cap. I&#8217;ve got a cap kit and am ready to go. I opened it up and this is what it looks like on the inside. Note: it has a lot of capacitors, so I&#8217;ll have to do &hellip; <a href=\"https:\/\/www.ussherpress.com\/blog\/?p=1295\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Re-capping a Commodore 1702 monitor<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[104,135],"tags":[97,123],"_links":{"self":[{"href":"https:\/\/www.ussherpress.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1295"}],"collection":[{"href":"https:\/\/www.ussherpress.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ussherpress.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ussherpress.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ussherpress.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1295"}],"version-history":[{"count":6,"href":"https:\/\/www.ussherpress.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1295\/revisions"}],"predecessor-version":[{"id":1303,"href":"https:\/\/www.ussherpress.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1295\/revisions\/1303"}],"wp:attachment":[{"href":"https:\/\/www.ussherpress.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1295"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ussherpress.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1295"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ussherpress.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1295"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}