{"id":13151,"date":"2022-06-19T21:28:00","date_gmt":"2022-06-19T13:28:00","guid":{"rendered":"https:\/\/rewa.tech\/macbook-a2337-no-backlight-issue-repair\/"},"modified":"2024-05-10T14:46:13","modified_gmt":"2024-05-10T06:46:13","slug":"macbook-a2337-probleme-de-retroeclairage-reparation","status":"publish","type":"post","link":"https:\/\/rewa.tech\/fr\/macbook-a2337-no-backlight-issue-repair\/","title":{"rendered":"R\u00e9paration du probl\u00e8me de r\u00e9tro\u00e9clairage du MacBook A2337"},"content":{"rendered":"<p>J'ai re\u00e7u un MacBook A2337 sans probl\u00e8me de r\u00e9tro\u00e9clairage.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/MacBook_Air_A2337.jpg\" alt=\"\" width=\"334\" height=\"334\" title=\"\"><\/p>\n<p><strong>Num\u00e9ro de mod\u00e8le<\/strong>: A2337<\/p>\n<p><strong>Ann\u00e9e de publication<\/strong>: Fin 2020<\/p>\n<\/p>\n<h2>Ph\u00e9nom\u00e8ne de d\u00e9faut<\/h2>\n<p>Le MacBook a \u00e9t\u00e9 r\u00e9par\u00e9 par un autre atelier de r\u00e9paration et peut d\u00e9marrer normalement, mais l'\u00e9cran d'affichage du MacBook s'\u00e9teint. <span style=\"color: #ff6600;\">le r\u00e9tro\u00e9clairage ne fonctionne pas.<\/span><\/p>\n<\/p>\n<h2>D\u00e9pannage<\/h2>\n<p>En d\u00e9montant le MacBook, on s'aper\u00e7oit d'abord qu'il manque des caches de protection.<\/p>\n<p><em>(Les couvercles de protection ne sont pas faciles \u00e0 trouver sur les plateformes commerciales en ligne ou sur le march\u00e9, ce serait un petit casse-t\u00eate... Il est vraiment important de prendre de bonnes habitudes de r\u00e9paration, tant pour la r\u00e9putation de l'atelier de r\u00e9paration que pour l'int\u00e9r\u00eat fondamental du client.  )<\/em><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/01__Some_shileding_covers_are_missing.png\" alt=\"\" title=\"\"><\/p>\n<\/p>\n<p>D\u00e9marrez ensuite le MacBook et v\u00e9rifiez attentivement, nous pouvons voir le logo Apple, mais il est tr\u00e8s faible.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/02__Boot_the_MacBook_and_check_carefully__we_can_see_the_Apple_logo__but_its_very_dim.png\" alt=\"\" width=\"605\" height=\"634\" title=\"\"><\/p>\n<\/p>\n<p>Ensuite, d\u00e9montons la carte m\u00e8re et mesurons la valeur de la diode autour du circuit int\u00e9gr\u00e9 de r\u00e9tro\u00e9clairage.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/03__Measure_the_diode_value.png\" alt=\"\" title=\"\"><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/04__Measure_the_diode_value_around_the_backlight_IC.png\" alt=\"\" width=\"610\" height=\"395\" title=\"\"><\/p>\n<\/p>\n<p>Apr\u00e8s mesure, toutes les valeurs des diodes autour du circuit int\u00e9gr\u00e9 de r\u00e9tro\u00e9clairage sont normales.<\/p>\n<p>Il est ensuite connect\u00e9 \u00e0 la machine d'alimentation en courant continu pour mesurer les valeurs de tension.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/05__Then_connect_with_the_DC_power_supply_machine_to_measure_the_voltage_values.png\" alt=\"\" title=\"\"><\/p>\n<\/p>\n<p>Apr\u00e8s la mesure, il s'av\u00e8re que la puissance d'entr\u00e9e du r\u00e9tro\u00e9clairage de 5V ne peut pas \u00eatre mesur\u00e9e.<\/p>\n<\/p>\n<p>Comme le montre le sch\u00e9ma fonctionnel simplifi\u00e9, la tension de 5 V est envoy\u00e9e de l'UV300 au circuit int\u00e9gr\u00e9 de r\u00e9tro\u00e9clairage UP800. Il y a donc deux possibilit\u00e9s pour que la tension de 5V ne soit pas g\u00e9n\u00e9r\u00e9e<\/p>\n<ul style=\"list-style-type: disc;\">\n<li>Les conditions de travail de l'UC300 ne sont pas satisfaites<\/li>\n<li>UC300 lui-m\u00eame avec probl\u00e8me<\/li>\n<\/ul>\n<p>Apr\u00e8s mesure, la tension d'entr\u00e9e de 12V est OK<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/the_12V_input_voltage_is_fine.png\" alt=\"\" title=\"\"><\/p>\n<\/p>\n<p>Concentrons-nous donc sur la v\u00e9rification du r\u00e9tro\u00e9clairage de l'IC UP800 et de l'UC300.<\/p>\n<p>Examinez attentivement le circuit int\u00e9gr\u00e9 de r\u00e9tro\u00e9clairage au microscope. Le circuit int\u00e9gr\u00e9 de r\u00e9tro\u00e9clairage a \u00e9t\u00e9 r\u00e9par\u00e9 auparavant et une grande quantit\u00e9 de flux de soudure s'est \u00e9coul\u00e9e de la base de la puce.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/07__The_backlight_IC_has_been_fixed_before__a_lot_of_solder_flux_are_flowed_out_from_the_base_of_the_chip.png\" alt=\"\" title=\"\"><\/p>\n<\/p>\n<p>De l'autre c\u00f4t\u00e9, un \u00e9clat a \u00e9galement \u00e9t\u00e9 r\u00e9par\u00e9 auparavant<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/08__has_been_repaired_before.png\" width=\"582\" height=\"481\" alt=\"\" title=\"\"><\/p>\n<\/p>\n<p>Continuer \u00e0 v\u00e9rifier la puce 5VS2 UC300, la puce n'a pas \u00e9t\u00e9 r\u00e9par\u00e9e, mais une petite r\u00e9sistance autour d'elle semble anormale.&nbsp;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/09__the_chip_not_been_repaired__but_a_small_resistor_around_it_looks_abnormal.png\" alt=\"\" title=\"\"><\/p>\n<p>Comme l'indique la fl\u00e8che,<span style=\"color: #ff6600;\"> cette petite r\u00e9sistance est li\u00e9e au signal ENABLE de l'UC300.<\/span><\/p>\n<p>Nous l'avons l\u00e9g\u00e8rement pouss\u00e9 avec la pince \u00e0 \u00e9piler et il s'est d\u00e9tach\u00e9 facilement, ce qui pourrait expliquer l'absence de r\u00e9tro\u00e9clairage.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/10__we_push_it_slightly_with_the_tweezer_and_it_just_came_off_easily.png\" alt=\"\" title=\"\"><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/Macbook_A2337.png\" alt=\"Macbook A2337\" width=\"1400\" height=\"766\" title=\"\"><\/p>\n<h2>Processus de r\u00e9paration<\/h2>\n<p>Remplacez la petite r\u00e9sistance par une nouvelle, puis nettoyez soigneusement la carte m\u00e8re.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/11__replace_it_with_a_new_one.png\" alt=\"\" title=\"\"><\/p>\n<\/p>\n<p>Ensuite, connectez l'appareil \u00e0 l'alimentation en courant continu et mesurez \u00e0 nouveau la tension de 5V pour le r\u00e9tro\u00e9clairage.<\/p>\n<p>Cette fois, la tension de 5V pour le circuit int\u00e9gr\u00e9 de r\u00e9tro\u00e9clairage peut \u00eatre mesur\u00e9e<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/12__5V_voltage.png\" alt=\"\" title=\"\"><\/p>\n<\/p>\n<p>Assemblez ensuite le MacBook et testez-le \u00e0 nouveau, le MacBook peut s'afficher normalement. Le probl\u00e8me est r\u00e9solu par le remplacement de la r\u00e9sistance RC333.<\/p>\n<\/p>\n<p>&gt;&gt; Restez \u00e0 l'\u00e9coute de la <a href=\"https:\/\/academy.rewa.tech\/\">Acad\u00e9mie REWA<\/a> pour mettre en lumi\u00e8re vos comp\u00e9tences en mati\u00e8re de r\u00e9paration.<\/p>","protected":false},"excerpt":{"rendered":"<p>Received a MacBook A2337 with no backlight issue. Model Number: A2337 Year released: Late 2020 Defect Phenomenon The MacBook has been repaired by another repair shop and can boot up normally, but the backlight does not work. Troubleshooting Disassemble the MacBook, and first, we find&nbsp;some shielding covers are missing. (The shielding covers are not easy [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":13152,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[782],"tags":[],"class_list":["post-13151","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-macbook-repair-case"],"_links":{"self":[{"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/posts\/13151","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/comments?post=13151"}],"version-history":[{"count":0,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/posts\/13151\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/media\/13152"}],"wp:attachment":[{"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/media?parent=13151"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/categories?post=13151"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/tags?post=13151"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}