{"id":180,"date":"2017-12-28T10:05:34","date_gmt":"2017-12-28T09:05:34","guid":{"rendered":"https:\/\/blog.worldofc64.com\/?p=180"},"modified":"2018-02-22T14:21:07","modified_gmt":"2018-02-22T13:21:07","slug":"silver-board-repair-ku-14194hb","status":"publish","type":"post","link":"https:\/\/blog.worldofc64.com\/?p=180","title":{"rendered":"Silver board repair (KU-14194HB) Part 1"},"content":{"rendered":"<p>In the last months i bought some sets of Commodore stuff which both contained, to my surprise,\u00a0 a silver label with a KU board. One of them was working except the SID (and had a rainbow label, probably due to an RMA repair with the power connector). In both cases i had my car loaded with boxes with stuff and paid about 180 euro for each load.<\/p>\n<p>Both are registered at the c64 <a href=\"http:\/\/c64preservation.com\/\">preservation<\/a> project now.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-181 size-medium\" src=\"https:\/\/blog.worldofc64.com\/wp-content\/uploads\/2017\/12\/screen-e1514451568197-225x300.jpg\" alt=\"\" width=\"225\" height=\"300\" srcset=\"https:\/\/blog.worldofc64.com\/wp-content\/uploads\/2017\/12\/screen-e1514451568197-225x300.jpg 225w, https:\/\/blog.worldofc64.com\/wp-content\/uploads\/2017\/12\/screen-e1514451568197-768x1024.jpg 768w\" sizes=\"auto, (max-width: 225px) 100vw, 225px\" \/><\/p>\n<p>The first silver was not working and showed the following screen, first i thought this might be a VIC issue or the clock generator, but comparison with screen shots from The <a href=\"http:\/\/derbian.webs.com\/c64diag\/fault.htm?id=c19_1\">Pictorial C64 Fault Guide<\/a> did make it looks like a leaking capacitor problem.<\/p>\n<p>I asked for some feedback on Facebook and it seems that these KU boards quit often have leaky capacitors, especially C107 en C108 near the VIC. So i needed to remove the cover of the shielding box where the VIC is located&#8230;to find out that some capacitor is soldered against it \ud83d\ude41<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-185\" src=\"https:\/\/blog.worldofc64.com\/wp-content\/uploads\/2017\/12\/20171227_184447-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/blog.worldofc64.com\/wp-content\/uploads\/2017\/12\/20171227_184447-300x225.jpg 300w, https:\/\/blog.worldofc64.com\/wp-content\/uploads\/2017\/12\/20171227_184447-768x576.jpg 768w, https:\/\/blog.worldofc64.com\/wp-content\/uploads\/2017\/12\/20171227_184447-1024x768.jpg 1024w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>I checked with the other KU board, to find out there was not capacitor at that location. Seems that i&#8217;ve got a REV.A and a REV.B board&#8230;which is kinda cool, if it&#8217;s important to you \ud83d\ude09<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-186\" src=\"https:\/\/blog.worldofc64.com\/wp-content\/uploads\/2017\/12\/other-silver-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/blog.worldofc64.com\/wp-content\/uploads\/2017\/12\/other-silver-300x225.jpg 300w, https:\/\/blog.worldofc64.com\/wp-content\/uploads\/2017\/12\/other-silver-768x576.jpg 768w, https:\/\/blog.worldofc64.com\/wp-content\/uploads\/2017\/12\/other-silver-1024x768.jpg 1024w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>Now i&#8217;m quit afraid what i will find after opening it. Will desolder that cap this evening, remove the box. Check C107 and C108, remove them&#8230;clean up and i dearly hope no damage is done beneath\u00a0 the capacitors. Second I need to do some continuity tests on all traces beneath there&#8230;or even repair them. Solder in some new caps (get them today)&#8230;and fire it up again. Hopefully that&#8217;s the only issue with this board. Oh&#8230;and i should not forget to solder back the capacitor which was connected to the shield!<\/p>\n<p>To be continued.<\/p>\n<p>Views: 900<\/p>","protected":false},"excerpt":{"rendered":"<p>In the last months i bought some sets of Commodore stuff which both contained, to my surprise,\u00a0 a silver label with a KU board. One of them was working except the SID (and had a rainbow label, probably due to &hellip; <a href=\"https:\/\/blog.worldofc64.com\/?p=180\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[13,12],"tags":[20,29],"class_list":["post-180","post","type-post","status-publish","format-standard","hentry","category-mycollection","category-repairs","tag-commodore-64","tag-ku-14194hb"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/blog.worldofc64.com\/index.php?rest_route=\/wp\/v2\/posts\/180","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.worldofc64.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.worldofc64.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.worldofc64.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.worldofc64.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=180"}],"version-history":[{"count":4,"href":"https:\/\/blog.worldofc64.com\/index.php?rest_route=\/wp\/v2\/posts\/180\/revisions"}],"predecessor-version":[{"id":190,"href":"https:\/\/blog.worldofc64.com\/index.php?rest_route=\/wp\/v2\/posts\/180\/revisions\/190"}],"wp:attachment":[{"href":"https:\/\/blog.worldofc64.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=180"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.worldofc64.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=180"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.worldofc64.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=180"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}