{"id":73,"date":"2022-05-09T11:22:03","date_gmt":"2022-05-09T11:22:03","guid":{"rendered":"https:\/?p=73"},"modified":"2025-11-26T08:28:14","modified_gmt":"2025-11-26T08:28:14","slug":"1571-disk-drive-repair","status":"publish","type":"post","link":"https:\/\/timsretrocorner.com\/?p=73","title":{"rendered":"1571 Disk Drive Repair"},"content":{"rendered":"\n<p>My 1571 disk drive throws some weird errors. In this series of three videos, I attempt to repair it&#8230;<\/p>\n\n\n\n<p>Very occasionally the drive works. Mostly it throws a &#8220;51 Overflow in Record&#8221; error when it attempts to read anything (directory, programs, data&#8230;). This is weird because that&#8217;s a write error! Yet it&#8217;s not writing&#8230;<\/p>\n\n\n\n<p>In part 1, I perform essential maintenance &#8211; strip the drive down, clean it, and replace the electrolytic capacitors. A good general overhaul in fact Does this fix it? Well, obviously not, or it wouldn&#8217;t be a three part series!<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Commodore 1571 Disk Drive Repair Part 1\" width=\"800\" height=\"450\" src=\"https:\/\/www.youtube.com\/embed\/Z2MpFInm43w?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>In part 2 of my 1571 disk drive repair series, I get down to some serious debugging, breaking out schematics, manuals, service and troubleshooting guides. I put the scope on it, and yes, I find the problem. At least, I find A problem. Because some of the logic outputs are definitely screwy. Sometimes. Maybe there are faulty ICs, but all the chips are soldered in, so they will need to be unsoldered&#8230;<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Commodore 1571 Disk Drive Repair Part 2\" width=\"800\" height=\"450\" src=\"https:\/\/www.youtube.com\/embed\/OcRhOhvjQiI?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>In part 3 of my 1571 disk drive repair series, I continue with the serious debugging. My eprom programmer has the ability to test logic chips. Some chips anyway. I put the chips that gave the faulty readings into the tester, and &#8211; surprise! &#8211;  they all pass. Every chip passes. The chips that I can&#8217;t test can be swapped with known good ones (some bought especially), and yet the problem persists.<\/p>\n\n\n\n<p>But then by sheer coincidence I decide to&#8230; No. Watch the video and find out, because you will be amazed at the answer.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Commodore 1571 disk drive Repair Part 3. Will it work?\" width=\"800\" height=\"450\" src=\"https:\/\/www.youtube.com\/embed\/LooOVaqZiWs?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>My 1571 disk drive throws some weird errors. In this series of three videos, I attempt to repair it&#8230; Very occasionally the drive works. Mostly [&#8230;]<\/p>\n","protected":false},"author":1,"featured_media":74,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,14],"tags":[],"class_list":["post-73","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-commodore","category-floppy-drives"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>1571 Disk Drive Repair - Tim&#039;s Retro Corner<\/title>\n<meta name=\"description\" content=\"I repair a 1571 disk drive that has a &quot;51 Overflow in Record&quot; error\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/timsretrocorner.com\/?p=73\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"1571 Disk Drive Repair - Tim&#039;s Retro Corner\" \/>\n<meta property=\"og:description\" content=\"I repair a 1571 disk drive that has a &quot;51 Overflow in Record&quot; error\" \/>\n<meta property=\"og:url\" content=\"https:\/\/timsretrocorner.com\/?p=73\" \/>\n<meta property=\"og:site_name\" content=\"Tim&#039;s Retro Corner\" \/>\n<meta property=\"article:published_time\" content=\"2022-05-09T11:22:03+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-11-26T08:28:14+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/timsretrocorner.com\/wp-content\/uploads\/2022\/05\/1571-Repair-Part-3.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"1080\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Tim\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Tim\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/timsretrocorner.com\/?p=73#article\",\"isPartOf\":{\"@id\":\"https:\/\/timsretrocorner.com\/?p=73\"},\"author\":{\"name\":\"Tim\",\"@id\":\"https:\/\/timsretrocorner.com\/#\/schema\/person\/063de9854e18cdeb76b175fe8ed103e1\"},\"headline\":\"1571 Disk Drive Repair\",\"datePublished\":\"2022-05-09T11:22:03+00:00\",\"dateModified\":\"2025-11-26T08:28:14+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/timsretrocorner.com\/?p=73\"},\"wordCount\":275,\"publisher\":{\"@id\":\"https:\/\/timsretrocorner.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/timsretrocorner.com\/?p=73#primaryimage\"},\"thumbnailUrl\":\"https:\/\/timsretrocorner.com\/wp-content\/uploads\/2022\/05\/1571-Repair-Part-3.jpg\",\"articleSection\":[\"Commodore\",\"Floppy Drives\"],\"inLanguage\":\"en-GB\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/timsretrocorner.com\/?p=73\",\"url\":\"https:\/\/timsretrocorner.com\/?p=73\",\"name\":\"1571 Disk Drive Repair - Tim's Retro Corner\",\"isPartOf\":{\"@id\":\"https:\/\/timsretrocorner.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/timsretrocorner.com\/?p=73#primaryimage\"},\"image\":{\"@id\":\"https:\/\/timsretrocorner.com\/?p=73#primaryimage\"},\"thumbnailUrl\":\"https:\/\/timsretrocorner.com\/wp-content\/uploads\/2022\/05\/1571-Repair-Part-3.jpg\",\"datePublished\":\"2022-05-09T11:22:03+00:00\",\"dateModified\":\"2025-11-26T08:28:14+00:00\",\"description\":\"I repair a 1571 disk drive that has a \\\"51 Overflow in Record\\\" error\",\"breadcrumb\":{\"@id\":\"https:\/\/timsretrocorner.com\/?p=73#breadcrumb\"},\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/timsretrocorner.com\/?p=73\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-GB\",\"@id\":\"https:\/\/timsretrocorner.com\/?p=73#primaryimage\",\"url\":\"https:\/\/timsretrocorner.com\/wp-content\/uploads\/2022\/05\/1571-Repair-Part-3.jpg\",\"contentUrl\":\"https:\/\/timsretrocorner.com\/wp-content\/uploads\/2022\/05\/1571-Repair-Part-3.jpg\",\"width\":1920,\"height\":1080},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/timsretrocorner.com\/?p=73#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/timsretrocorner.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"1571 Disk Drive Repair\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/timsretrocorner.com\/#website\",\"url\":\"https:\/\/timsretrocorner.com\/\",\"name\":\"Tim's Retro Corner\",\"description\":\"It's a corner. 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