{"id":1282,"date":"2026-09-02T23:25:08","date_gmt":"2026-09-02T15:25:08","guid":{"rendered":"https:\/\/www.ddzheng.cc\/?p=1282"},"modified":"2026-09-02T23:25:08","modified_gmt":"2026-09-02T15:25:08","slug":"fluke-philips-scopemeter-keypad-repair","status":"publish","type":"post","link":"https:\/\/www.ddzheng.cc\/?p=1282","title":{"rendered":"Fluke\/Philips Scopemeter Keypad Repair"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">I have a Fluke 97 Scopemeter which have some defective keys. My specific unit is an early first revision one. I&#8217;ll quote an image from EEVBlog here.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"831\" height=\"1070\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2026\/09\/\u5c4f\u5e55\u622a\u56fe-2026-09-02-231427.jpg\" alt=\"\" class=\"wp-image-1285\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2026\/09\/\u5c4f\u5e55\u622a\u56fe-2026-09-02-231427.jpg 831w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2026\/09\/\u5c4f\u5e55\u622a\u56fe-2026-09-02-231427-398x512.jpg 398w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2026\/09\/\u5c4f\u5e55\u622a\u56fe-2026-09-02-231427-768x989.jpg 768w\" sizes=\"auto, (max-width: 831px) 100vw, 831px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The keypad is membrane type and some traces are not connecting anymore. I used conductive silver epoxy to connect broken traces. It&#8217;s necessary to scratch off the oxide layer of the silver trace and\/or draw the epoxy onto the key contact part which is always conductive.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"927\" height=\"1236\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2026\/09\/\u5c4f\u5e55\u622a\u56fe-2026-09-02-231134.jpg\" alt=\"\" class=\"wp-image-1283\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2026\/09\/\u5c4f\u5e55\u622a\u56fe-2026-09-02-231134.jpg 927w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2026\/09\/\u5c4f\u5e55\u622a\u56fe-2026-09-02-231134-384x512.jpg 384w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2026\/09\/\u5c4f\u5e55\u622a\u56fe-2026-09-02-231134-768x1024.jpg 768w\" sizes=\"auto, (max-width: 927px) 100vw, 927px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">I used Mechanic brand silver epoxy. It&#8217;s a heat set type. I baked it in the oven at 60 degrees Celsius top and bottom, with fan on, for 5 minutes after each application. The baking temperature should ideally reach at least 135 degrees Celsius but it&#8217;s not possible with this type of membrane. Low temperature baking or hot air is also effective, as long as most of the solvents are driven out.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"770\" height=\"437\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2026\/09\/\u5c4f\u5e55\u622a\u56fe-2026-09-02-231736.jpg\" alt=\"\" class=\"wp-image-1286\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2026\/09\/\u5c4f\u5e55\u622a\u56fe-2026-09-02-231736.jpg 770w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2026\/09\/\u5c4f\u5e55\u622a\u56fe-2026-09-02-231736-512x291.jpg 512w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2026\/09\/\u5c4f\u5e55\u622a\u56fe-2026-09-02-231736-766x435.jpg 766w\" sizes=\"auto, (max-width: 770px) 100vw, 770px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">After all broken traces are repaired, all keys returned to working condition. Before final assembly I cleaned all key pads and conductive rubber with isopropyl alcohol.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"693\" height=\"1236\" src=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2026\/09\/\u5c4f\u5e55\u622a\u56fe-2026-09-02-231203.jpg\" alt=\"\" class=\"wp-image-1284\" srcset=\"https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2026\/09\/\u5c4f\u5e55\u622a\u56fe-2026-09-02-231203.jpg 693w, https:\/\/www.ddzheng.cc\/wp-content\/uploads\/2026\/09\/\u5c4f\u5e55\u622a\u56fe-2026-09-02-231203-287x512.jpg 287w\" sizes=\"auto, (max-width: 693px) 100vw, 693px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Repair of membrane keypad using silver epoxy<\/p>\n","protected":false},"author":1,"featured_media":1283,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[7,12,10],"class_list":["post-1282","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tech","tag-hw","tag-repair","tag-writeup"],"_links":{"self":[{"href":"https:\/\/www.ddzheng.cc\/index.php?rest_route=\/wp\/v2\/posts\/1282","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ddzheng.cc\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ddzheng.cc\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ddzheng.cc\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ddzheng.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1282"}],"version-history":[{"count":1,"href":"https:\/\/www.ddzheng.cc\/index.php?rest_route=\/wp\/v2\/posts\/1282\/revisions"}],"predecessor-version":[{"id":1287,"href":"https:\/\/www.ddzheng.cc\/index.php?rest_route=\/wp\/v2\/posts\/1282\/revisions\/1287"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ddzheng.cc\/index.php?rest_route=\/wp\/v2\/media\/1283"}],"wp:attachment":[{"href":"https:\/\/www.ddzheng.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1282"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ddzheng.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1282"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ddzheng.cc\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1282"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}