{"id":16641,"date":"2025-08-06T07:27:52","date_gmt":"2025-08-06T06:27:52","guid":{"rendered":"https:\/\/www.bramjacobse.nl\/wordpress\/?p=16641"},"modified":"2025-08-17T20:20:49","modified_gmt":"2025-08-17T19:20:49","slug":"cd-304-trouble-reading-cd","status":"publish","type":"post","link":"https:\/\/www.bramjacobse.nl\/wordpress\/?p=16641","title":{"rendered":"CD 304 Trouble Reading CD"},"content":{"rendered":"

This CD 304 has difficulty reading and playing Disc’s<\/p>\n

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The Eye-Pattern looks nasty<\/p>\n

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maintenance on CDM-1<\/p>\n

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Eringa High-end output modification<\/p>\n

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I can’t find the problem in the \u00a0CDM-1 , i think its a laser or \u00a0photodetector or optical problem. So i replaced the CDM-1 and now the player is working fine. removed the Eringa Modification<\/p>\n

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Oeps “Stocko” trouble<\/p>\n

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New Display glass<\/p>\n

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“Serious deterioration of the eye pattern is observed when aberrations are present that elongate the scanning spot in the track direction and thus increases the isI. In figure 2.39(b) the information track is read with an astigmatic light spot whose focal line parallel to the track is in focus on the disc (the astigmatic coefficient Wz2 is 0.35). The eye pattern is rather disturbed now and the experiment shows that an unacceptable bit error rate is detected.”<\/p>\n

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Link : CDM-1 CDA preamp Equaliser \u2013 Mart Bierhoff<\/a><\/span><\/p>\n

Added some chassis cinch and reconnected the line level control<\/p>\n

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This CD 304 has difficulty reading and playing Disc’s The Eye-Pattern looks nasty   maintenance on CDM-1 Eringa High-end output modification I can’t find the problem in the \u00a0CDM-1 , i think its a...<\/p>\n","protected":false},"author":1,"featured_media":16636,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[129,121],"tags":[],"class_list":["post-16641","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cd-304","category-philips"],"yoast_head":"\nCD 304 Trouble Reading CD - Bram Jacobse<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.bramjacobse.nl\/wordpress\/?p=16641\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"CD 304 Trouble Reading CD - Bram Jacobse\" \/>\n<meta property=\"og:description\" content=\"This CD 304 has difficulty reading and playing Disc’s The Eye-Pattern looks nasty   maintenance on CDM-1 Eringa High-end output modification I can’t find the problem in the \u00a0CDM-1 , i think its a...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.bramjacobse.nl\/wordpress\/?p=16641\" \/>\n<meta property=\"og:site_name\" content=\"Bram Jacobse\" \/>\n<meta property=\"article:published_time\" content=\"2025-08-06T06:27:52+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-17T19:20:49+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.bramjacobse.nl\/wordpress\/wp-content\/uploads\/2025\/08\/CD304_20250805_01.jpeg\" \/>\n\t<meta property=\"og:image:width\" content=\"1280\" \/>\n\t<meta property=\"og:image:height\" content=\"478\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Bram\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Bram\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/?p=16641#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/?p=16641\"},\"author\":{\"name\":\"Bram\",\"@id\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/#\\\/schema\\\/person\\\/046607e546e3a7190b34f7793abbe6fe\"},\"headline\":\"CD 304 Trouble Reading CD\",\"datePublished\":\"2025-08-06T06:27:52+00:00\",\"dateModified\":\"2025-08-17T19:20:49+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/?p=16641\"},\"wordCount\":167,\"publisher\":{\"@id\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/#\\\/schema\\\/person\\\/046607e546e3a7190b34f7793abbe6fe\"},\"image\":{\"@id\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/?p=16641#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/wp-content\\\/uploads\\\/2025\\\/08\\\/CD304_20250805_01.jpeg\",\"articleSection\":[\"CD 304\",\"Philips\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/?p=16641\",\"url\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/?p=16641\",\"name\":\"CD 304 Trouble Reading CD - 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