{"id":12852,"date":"2021-06-17T01:44:00","date_gmt":"2021-06-16T17:44:00","guid":{"rendered":"https:\/\/rewa.tech\/iphone-7-plus-no-backlight-issue\/"},"modified":"2024-05-10T15:29:13","modified_gmt":"2024-05-10T07:29:13","slug":"iphone-7-plus-sin-problema-de-retroiluminacion","status":"publish","type":"post","link":"https:\/\/rewa.tech\/es\/iphone-7-plus-no-backlight-issue\/","title":{"rendered":"iPhone 7 Plus No hay problema de luz de fondo"},"content":{"rendered":"

Fen\u00f3meno del mal funcionamiento<\/span><\/b><\/p>\n

<\/span><\/b><\/p>\n

Cuando recibimos un tel\u00e9fono con la pantalla oscura, lo primero que tenemos que hacer es juzgar si se trata de un problema de arranque, de pantalla o de retroiluminaci\u00f3n.<\/span><\/p>\n

Tras comprobarlo detenidamente, la pantalla no se enciende, pero podemos ver un tenue logotipo de Apple. <\/span><\/p>\n

As\u00ed que podemos sacar una conclusi\u00f3n esto es iPhone 7 Plus no hay problema de luz de fondo.<\/span><\/p>\n

\"iPhone<\/span><\/p>\n

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

Soluci\u00f3n de problemas<\/span><\/b><\/p>\n

<\/span><\/b><\/p>\n

Desmontamos el tel\u00e9fono y conectamos la placa base con la fuente de alimentaci\u00f3n DC, la lectura de corriente en el amper\u00edmetro es normal. As\u00ed que podemos confirmar que el tel\u00e9fono se ha encendido normalmente, pero la luz de fondo no puede funcionar. <\/span><\/p>\n

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

Despu\u00e9s de sustituir otra pantalla para probar, confirmamos que el problema proviene del circuito de retroiluminaci\u00f3n de la placa base. A partir de los esquemas, pudimos ver que hay 6 l\u00edneas relacionadas con la luz de fondo. <\/span><\/p>\n

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

\"\"<\/span><\/p>\n

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

En primer lugar, vamos a comprobar el valor del diodo en el pin37 al pin47 del conector J4502 primero, y el valor del diodo en el pin 37 se encontr\u00f3 que era OL, que era anormal.<\/span><\/p>\n

\"\"<\/span><\/p>\n

Siguiendo el pin 37 anormal, encontramos que el filtro FL3902 estaba en la l\u00ednea entre el IC de retroiluminaci\u00f3n U3701 y el pin37. A continuaci\u00f3n, compruebe el FL3902 para ver si est\u00e1 roto o no, despu\u00e9s de comprobar, est\u00e1 bien.<\/span><\/p>\n

\"\"<\/span><\/p>\n

As\u00ed que podemos concluir que el problema podr\u00eda venir de U3701.<\/span><\/p>\n

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

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

A continuaci\u00f3n, sustituya U3701 por uno nuevo, y montar el tel\u00e9fono para probar, problema resuelto.<\/span><\/p>\n

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

\"\"    \"\"<\/span><\/p>\n

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

\n<\/a>Curso de reparaci\u00f3n de la placa base del iPhone 7<\/span><\/u><\/a><\/p>\n

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\n<\/h2>","protected":false},"excerpt":{"rendered":"

Malfunction Phenomenon When we receive a phone with a dark screen, the first thing that we need to do is to judge whether it’s no boot-up, no display, or no backlight issue. After carefully checking, the screen can’t be lighted on but we can see a faint apple logo. So we can draw a conclusion […]<\/p>\n","protected":false},"author":10,"featured_media":12853,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[780],"tags":[],"class_list":["post-12852","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-iphone-repair-cases"],"_links":{"self":[{"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/posts\/12852","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/comments?post=12852"}],"version-history":[{"count":0,"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/posts\/12852\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/media\/12853"}],"wp:attachment":[{"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/media?parent=12852"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/categories?post=12852"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/tags?post=12852"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}