{"id":16714,"date":"2025-08-31T18:03:44","date_gmt":"2025-08-31T17:03:44","guid":{"rendered":"https:\/\/www.bramjacobse.nl\/wordpress\/?p=16714"},"modified":"2025-08-31T21:01:40","modified_gmt":"2025-08-31T20:01:40","slug":"cd-300-bought-second-hand-and-doesnt-work","status":"publish","type":"post","link":"https:\/\/www.bramjacobse.nl\/wordpress\/?p=16714","title":{"rendered":"CD 300 : Bought second hand and doesn’t work"},"content":{"rendered":"

CD 300 : Bought second hand and doesn’t work , it has been re-capped , “Bram can you have a look”<\/strong><\/em><\/p>\n

\"\"<\/p>\n

First check , Red Tape ?? on the RF shielding<\/p>\n

\"\"<\/p>\n

what happened here<\/p>\n

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 <\/p>\n

\"\"<\/p>\n

Power supply<\/p>\n

\"\"<\/p>\n

1 TDA1540 under the contact spray<\/p>\n

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Laser power safety switch. with Capicitor ???<\/p>\n

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Audio Connector<\/p>\n

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 <\/p>\n

\"\"<\/p>\n

The LM 337 is getting very very Hot<\/p>\n

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 <\/p>\n

\"\"<\/p>\n

 <\/p>\n

\"\"<\/p>\n

Testing only the power supply , -7volt is there , but the -18 volt is missing. there are shorts to ground between -7 and GND -18 and GND ;-(<\/p>\n

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Disconnecting this connector resolve the shorts on the power supply<\/p>\n

\"\"<\/p>\n

The short circuits are on the Audio board.<\/p>\n

\"\"<\/p>\n

Found the 1st one solderbridge<\/p>\n

\"\"<\/p>\n

 <\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

 <\/p>\n

And the 2nd one<\/p>\n

\"\"<\/p>\n

 <\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

After removing \u00a0the shorts, \u00a0a quick test -18 is still missing but this is only needed for audio . Laser is working, \u00a0focus found and disc is spinning, HF is there, but the player is \u00a0not reading the Table Off Content<\/p>\n

\"\"<\/p>\n

 <\/p>\n

\"\"<\/p>\n

And number 3 !<\/p>\n

\"\"<\/p>\n

 <\/p>\n

\"\"<\/p>\n

 <\/p>\n

\"\"<\/p>\n

Removed solderbridge number 3 and we have a nice RF signal<\/p>\n

\"\"<\/p>\n

T.O.C. is read<\/p>\n

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Repaired -18 rail, faulty diode in powersupply. There \u00a0is audio \ud83d\ude42<\/p>\n

\"\"<\/p>\n

Replaced IC-sockets SoPhi Board<\/p>\n

\"\"<\/p>\n

Early Sophi board, some extra wies<\/p>\n

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Oeps , almost a short<\/p>\n

\"\"<\/p>\n

 <\/p>\n

\"\"<\/p>\n

 <\/p>\n

\"\"<\/p>\n

 <\/p>\n

Ready for a test run<\/p>\n

\"\"<\/p>\n

“The player played through about ten CDs last night and this afternoon, from start to finish, and didn’t skip a single time! It sounds fantastic, too. It’s great to have it playing again! Thanks again and my admiration for the work ;)”<\/strong><\/p>\n

“De speler heeft gisteravond en vanmiddag ik denk iets van tien cd’s gespeeld, van begin tot eind, en is niet \u00e9\u00e9n keer overgeslagen!. Hij klinkt ook nog eens heerlijk. Fijn om ‘m weer spelen te hebben! Nogmaals mijn dank en bewondering voor het werk ;)”<\/strong><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

CD 300 : Bought second hand and doesn’t work , it has been re-capped , “Bram can you have a look” First check , Red Tape ?? on the RF shielding what happened here...<\/p>\n","protected":false},"author":1,"featured_media":16703,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[81,121,248,3],"tags":[],"class_list":["post-16714","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cd-300","category-philips","category-refurbished","category-repair"],"yoast_head":"\nCD 300 : Bought second hand and doesn't work - 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=16714\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"CD 300 : Bought second hand and doesn't work - 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