{"id":338,"date":"2025-03-10T10:14:44","date_gmt":"2025-03-10T09:14:44","guid":{"rendered":"https:\/\/abc80.dk\/?page_id=338"},"modified":"2025-04-05T15:16:24","modified_gmt":"2025-04-05T14:16:24","slug":"monitor-restoration","status":"publish","type":"page","link":"https:\/\/abc80.dk\/?page_id=338","title":{"rendered":"Monitor restoration"},"content":{"rendered":"\n

I have taken out the PCB inside the monitor. <\/p>\n\n\n\n

Taken into consideration that smoke came out last time i used the monitor i will replace the bigger electrolytics capacitors in the power supply and critical places. I will also get rid af the few tantalum capacitors.<\/p>\n\n\n\n

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Replaced capacitors.<\/h2>\n\n\n\n

i have now replaced ALL the electrolytics and tantalum capacitors on the main TV board.<\/p>\n\n\n\n

i have powered the board with a lab psu and it consumed approx 700mA and NO smoke. The regulated 11V is 11,5 V when 15 V is applied on D1+D2 pins. This is the power input from Transformer to the recifier bridge <\/p>\n\n\n\n

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Next step has now been done. I have replaced the 10.000 uF capacitor for 9V rail and two 470uF for +\/-17V rails. After checking the voltage level i could conclude that one of the 315 mA fuses were blown for one of the 17V rails I replaced it and voltage was on again. This could be the reason for the garbage on the video output as the -17V is regulated via a 7905 voltage regulator to -5V for refreshing the video RAM <\/p>\n\n\n\n

<\/p>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

I have taken out the PCB inside the monitor. Taken into consideration that smoke came out last time i used the monitor i will replace the bigger electrolytics capacitors in the power supply and critical places. I will also get rid af the few tantalum capacitors. Replaced capacitors. i have now replaced ALL the electrolytics […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-338","page","type-page","status-publish","hentry"],"yoast_head":"\nMonitor restoration - Luxor ABC 80<\/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:\/\/abc80.dk\/?page_id=338\" \/>\n<meta property=\"og:locale\" content=\"da_DK\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Monitor restoration - Luxor ABC 80\" \/>\n<meta property=\"og:description\" content=\"I have taken out the PCB inside the monitor. Taken into consideration that smoke came out last time i used the monitor i will replace the bigger electrolytics capacitors in the power supply and critical places. 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