{"id":64,"date":"2016-02-17T11:24:40","date_gmt":"2016-02-17T11:24:40","guid":{"rendered":"http:\/\/kapica.it\/?p=64"},"modified":"2016-02-19T18:48:18","modified_gmt":"2016-02-19T18:48:18","slug":"naprawa-wzmacniacza-gran-e-2x200p","status":"publish","type":"post","link":"http:\/\/kapica.it\/?p=64","title":{"rendered":"Naprawa wzmacniacza Gran E 2x200P"},"content":{"rendered":"<p>Objawy: nie dzia\u0142aj\u0105 obie ko\u0144c\u00f3wki mocy, wcze\u015bniej dzia\u0142a\u0142a jedna i obci\u0105\u017cana by\u0142a dwiema kolumnami r\u00f3wnolegle.<\/p>\n<p>Diagnostyka: przepalone bezpieczniki w obwodzie zasilania ko\u0144c\u00f3wek mocy (w jednej ga\u0142\u0119zi), odnalezione zwarcia mi\u0119dzy kolektorem i emiterem tranzystor\u00f3w mocy, wadliwie dobrane tranzystory mocy (r\u00f3\u017cni producenci, brak parowania).<\/p>\n<p><a href=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/20111228552.jpg\" rel=\"attachment wp-att-65\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-65\" title=\"20111228552\" src=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/20111228552-300x225.jpg\" alt=\"20111228552\" width=\"300\" height=\"225\" data-popupalt-original-title=\"null\" srcset=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/20111228552-300x225.jpg 300w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/20111228552-768x576.jpg 768w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/20111228552-1024x768.jpg 1024w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/20111228552-640x480.jpg 640w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/20111228552.jpg 2048w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>Naprawa: Wzmacniacz mocno eksploatowany i wielokrotnie wcze\u015bniej amatorsko naprawiany. Konstrukcja bazuje na tranzystorach mocy w uk\u0142adzie Darlingtona. Wida\u0107 \u015blady wymiany pojedynczych tranzystor\u00f3w mocy, prawdopodobnie przypadkowo wstawianych bez dobierania. Na skutek zwarcia w stopniu mocy uleg\u0142a r\u00f3wnie\u017c zniszczeniu \u015bcie\u017cka w uk\u0142adzie zasilacza.<\/p>\n<p>Napraw\u0119 rozpocz\u0105\u0142em od przywr\u00f3cenia sprawno\u015bci zasilacza. Nast\u0119pnie wymieni\u0142em wszystkie tranzystory mocy na parowane BDW83\/84 z pewnego \u017ar\u00f3d\u0142a.<\/p>\n<p><a href=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20121008794.jpg\" rel=\"attachment wp-att-75\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-75\" src=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20121008794-300x225.jpg\" alt=\"m_20121008794\" width=\"300\" height=\"225\" srcset=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20121008794-300x225.jpg 300w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20121008794-768x576.jpg 768w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20121008794-640x480.jpg 640w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20121008794.jpg 900w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>Po kontroli tranzystor\u00f3w steruj\u0105cych (OK) przyst\u0105pi\u0142em do uruchamiania ko\u0144c\u00f3wek korzystaj\u0105c z autotransformatora. Ko\u0144c\u00f3wki jak i ca\u0142y wzmacniacz zadzia\u0142a\u0142 bez problemu. Nast\u0119pnie ustawi\u0142em prawid\u0142owy pr\u0105d podk\u0142adu, co wymaga\u0142o wymiany jednego z potencjometr\u00f3w monta\u017cowych. Dokona\u0142em test\u00f3w na sztucznym obci\u0105\u017ceniu i w ko\u0144cu przetestowa\u0142em wzmacniacz na odpowiednich kolumnach.<\/p>\n<p>Wzmacniacz dzia\u0142a poprawnie ju\u017c ponad rok traktowany r\u00f3wnie bezlito\u015bnie jak wcze\u015bniej \ud83d\ude42<\/p>\n<p>Poni\u017cej kilka zdj\u0119\u0107 wzmacniacza i jego wn\u0119trza.<\/p>\n<p><a href=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228551-1.jpg\" rel=\"attachment wp-att-67\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-67\" src=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228551-1-300x225.jpg\" alt=\"m_20111228551\" width=\"300\" height=\"225\" srcset=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228551-1-300x225.jpg 300w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228551-1-768x576.jpg 768w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228551-1-640x480.jpg 640w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228551-1.jpg 900w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a> <a href=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228554.jpg\" rel=\"attachment wp-att-68\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-68\" src=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228554-300x225.jpg\" alt=\"m_20111228554\" width=\"300\" height=\"225\" srcset=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228554-300x225.jpg 300w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228554-768x576.jpg 768w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228554-640x480.jpg 640w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228554.jpg 900w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a> <a href=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228556.jpg\" rel=\"attachment wp-att-69\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-69\" src=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228556-300x225.jpg\" alt=\"m_20111228556\" width=\"300\" height=\"225\" srcset=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228556-300x225.jpg 300w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228556-768x576.jpg 768w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228556-640x480.jpg 640w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228556.jpg 900w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a> <a href=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228558.jpg\" rel=\"attachment wp-att-70\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-70\" src=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228558-300x225.jpg\" alt=\"m_20111228558\" width=\"300\" height=\"225\" srcset=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228558-300x225.jpg 300w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228558-768x576.jpg 768w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228558-640x480.jpg 640w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228558.jpg 900w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a> <a href=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228559.jpg\" rel=\"attachment wp-att-71\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-71\" src=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228559-300x225.jpg\" alt=\"m_20111228559\" width=\"300\" height=\"225\" srcset=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228559-300x225.jpg 300w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228559-768x576.jpg 768w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228559-640x480.jpg 640w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228559.jpg 900w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a> <a href=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228561.jpg\" rel=\"attachment wp-att-72\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-72\" src=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228561-300x225.jpg\" alt=\"m_20111228561\" width=\"300\" height=\"225\" srcset=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228561-300x225.jpg 300w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228561-768x576.jpg 768w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228561-640x480.jpg 640w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111228561.jpg 900w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a> <a href=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111229565.jpg\" rel=\"attachment wp-att-73\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-73\" src=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111229565-300x225.jpg\" alt=\"m_20111229565\" width=\"300\" height=\"225\" srcset=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111229565-300x225.jpg 300w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111229565-768x576.jpg 768w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111229565-640x480.jpg 640w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111229565.jpg 900w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a> <a href=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111229566.jpg\" rel=\"attachment wp-att-74\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-74\" src=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111229566-300x225.jpg\" alt=\"m_20111229566\" width=\"300\" height=\"225\" srcset=\"http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111229566-300x225.jpg 300w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111229566-768x576.jpg 768w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111229566-640x480.jpg 640w, http:\/\/kapica.it\/wp-content\/uploads\/2016\/02\/m_20111229566.jpg 900w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Objawy: nie dzia\u0142aj\u0105 obie ko\u0144c\u00f3wki mocy, wcze\u015bniej dzia\u0142a\u0142a jedna i obci\u0105\u017cana by\u0142a dwiema kolumnami r\u00f3wnolegle. Diagnostyka: przepalone bezpieczniki w obwodzie zasilania ko\u0144c\u00f3wek mocy (w jednej ga\u0142\u0119zi), odnalezione zwarcia mi\u0119dzy kolektorem i emiterem tranzystor\u00f3w mocy, wadliwie dobrane tranzystory mocy (r\u00f3\u017cni producenci, brak parowania). Naprawa: Wzmacniacz mocno eksploatowany i wielokrotnie wcze\u015bniej amatorsko naprawiany. Konstrukcja bazuje na tranzystorach&#8230;<\/p>\n","protected":false},"author":1,"featured_media":72,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[2],"tags":[23,22,9,24,25],"_links":{"self":[{"href":"http:\/\/kapica.it\/index.php?rest_route=\/wp\/v2\/posts\/64"}],"collection":[{"href":"http:\/\/kapica.it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/kapica.it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/kapica.it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/kapica.it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=64"}],"version-history":[{"count":1,"href":"http:\/\/kapica.it\/index.php?rest_route=\/wp\/v2\/posts\/64\/revisions"}],"predecessor-version":[{"id":76,"href":"http:\/\/kapica.it\/index.php?rest_route=\/wp\/v2\/posts\/64\/revisions\/76"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/kapica.it\/index.php?rest_route=\/wp\/v2\/media\/72"}],"wp:attachment":[{"href":"http:\/\/kapica.it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=64"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/kapica.it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=64"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/kapica.it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=64"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}