{"id":13049,"date":"2022-03-06T12:09:00","date_gmt":"2022-03-06T04:09:00","guid":{"rendered":"https:\/\/rewa.tech\/macbook-a1707-cannot-boot-issue-repair-820-00281-a\/"},"modified":"2024-05-10T15:24:48","modified_gmt":"2024-05-10T07:24:48","slug":"macbook-a1707-ne-peut-pas-demarrer-probleme-reparation-820-00281-a","status":"publish","type":"post","link":"https:\/\/rewa.tech\/fr\/macbook-a1707-cannot-boot-issue-repair-820-00281-a\/","title":{"rendered":"R\u00e9paration du probl\u00e8me de d\u00e9marrage du MacBook A1707 (820-00281-A)"},"content":{"rendered":"<p>J'ai re\u00e7u un MacBook A1707 avec un probl\u00e8me de d\u00e9marrage impossible, le num\u00e9ro de carte est 820-00281-A.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/Macbook_Pro_A1707.png\" alt=\"\" title=\"\"><\/p>\n<\/p>\n<h2><span style=\"color: #008080;\"><strong>\u25cf V\u00e9rifier l'aspect cosm\u00e9tique<\/strong><\/span><\/h2>\n<p>Le client a d\u00e9clar\u00e9 que le MacBook ne pouvait pas \u00eatre d\u00e9marr\u00e9, il l'a connect\u00e9 avec un adaptateur et l'a mis sous tension pour le tester, mais il n'a obtenu aucune r\u00e9ponse. Il a ensuite d\u00e9mont\u00e9 le MacBook et sorti la carte m\u00e8re pour v\u00e9rifier qu'il n'y avait pas de trace de d\u00e9g\u00e2ts d'eau et que l'aspect \u00e9tait \u00e9galement bon.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/Teardown_the_A1707.jpg\" alt=\"D\u00e9montage de l&#039;A1707\" width=\"1200\" height=\"675\" title=\"\"><\/p>\n<\/p>\n<p>Retirez la carte m\u00e8re et v\u00e9rifiez qu'elle est en bon \u00e9tat.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/A1707-820-00281-A-___a___.jpg\" alt=\"820-00281-A\" width=\"1200\" height=\"1200\" title=\"\"><\/p>\n<h2><span style=\"color: #008080;\">\u25cf R\u00e9paration au niveau de la puce de la carte m\u00e8re<\/span><\/h2>\n<p><span style=\"color: #008080;\"><\/span><\/p>\n<ul style=\"list-style-type: square;\">\n<li><span style=\"color: #008080;\"><span style=\"color: #000000;\"><strong>\u00c9tape 1.<\/strong>&nbsp; Il faut savoir que la s\u00e9quence de d\u00e9marrage de base du MacBook est la suivante : elle g\u00e9n\u00e8re le bouton&nbsp;<\/span><span style=\"color: #333333;\">PP3V3_G3H &gt;&gt;&gt; Production de tension de secours de la CE &gt;&gt;&gt; tension publique<\/span><\/span><\/li>\n<\/ul>\n<p><span style=\"color: #008080;\">&nbsp; &nbsp; &nbsp; &nbsp;<img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/PP3V3_G3H__U6903_.png\" alt=\"\" title=\"\"><\/span><\/p>\n<p><span style=\"color: #333333;\">Comme nous pouvons le voir sur le sch\u00e9ma ci-dessus, le PP3V3_G3H_REG EC est g\u00e9n\u00e9r\u00e9 par le circuit PWM qui est compos\u00e9 d'une puce U6903 (MAX77596 DRMOS) et d'une inductance L6900.<\/span><\/p>\n<p><span style=\"color: #008080;\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/U6903_Signals.png\" alt=\"\" title=\"\"><\/span><\/p>\n<p><span style=\"color: #008080;\"><\/span><\/p>\n<ul style=\"list-style-type: circle;\">\n<li><span style=\"color: #008000;\">La broche 2 est l'entr\u00e9e d'alimentation <\/span><\/li>\n<li><span style=\"color: #008000;\">La broche 8 est le signal valid\u00e9<\/span><span><\/span><span><\/span><\/li>\n<\/ul>\n<p style=\"padding-left: 30px;\"><span>V\u00e9rifier l'\u00e9tat de l'inducteur L6900 \u00e0 l'aide de la fonction&nbsp;<\/span>oscilloscope, la forme d'onde est correcte.<\/p>\n<p style=\"padding-left: 30px;\">V\u00e9rifier que la tension sur l'inducteur L6900 est \u00e9galement bonne.<\/p>\n<p><span style=\"color: #008080;\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/L6900.png\" alt=\"L6900\" width=\"1200\" height=\"609\" style=\"display: block; margin-left: auto; margin-right: auto;\" title=\"\"><\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"color: #008080;\">&lt;L&#039;image bitmap est ouverte par <a href=\"http:\/\/boardviewer.net\/\" target=\"_blank\" rel=\"noopener\">Boardviewer&gt;<\/a><\/span><\/p>\n<p><span style=\"color: #008080;\"><\/span><\/p>\n<ul style=\"list-style-type: square;\">\n<li><span style=\"color: #008080;\"><span style=\"color: #000000;\"><strong>\u00c9tape 2.<\/strong>&nbsp;<\/span> <span style=\"color: #333333;\">V\u00e9rifier les 6 conditions de fonctionnement de base de la puce EC<\/span><\/span><\/li>\n<\/ul>\n<p><span style=\"color: #339966;\">&nbsp; &nbsp; &nbsp; &nbsp; 01. EC Standby VBAT et VDDA, la tension mesur\u00e9e sur l'inducteur L5001 est de 3,3V, OK !<\/span><\/p>\n<p><span style=\"color: #008080;\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/L5001.png\" alt=\"A1707 Impossible de d\u00e9marrer\" title=\"\"><\/span><\/p>\n<p><span style=\"color: #008000;\">&nbsp; &nbsp; &nbsp; &nbsp; 02. La deuxi\u00e8me tension de veille pour le CE, PP3V0_S5_AVREF_SMC. Elle est fournie par la broche 8 de U5165 (TS3330), la valeur de tension mesur\u00e9e sur C5020 est de 3V, \u00e9galement OK.&nbsp;<\/span><\/p>\n<p><span style=\"color: #008080;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/U5165.png\" alt=\"U6165\" width=\"1200\" height=\"483\" title=\"\"><\/span><\/p>\n<p><span style=\"color: #008080;\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/C5020.png\" alt=\"\" title=\"\"><\/span><\/p>\n<p><span style=\"color: #008080;\">&nbsp; &nbsp; &nbsp; <span style=\"color: #339966;\">&nbsp; 03. EC XOSC0 standby clock signal, it's outputted by the PCH U1100 SUSCL pin. Le nom du signal est PM_CLK32K_SUSCLK_R, apr\u00e8s avoir travers\u00e9 R5112, changer le nom en&nbsp;<\/span><\/span><span style=\"color: #339966;\">SMC_CLK32K. V\u00e9rifiez que la forme d'onde sur le R5112 est une forme d'onde sinuso\u00efdale standard, ce qui est \u00e9galement correct.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/R12.png\" alt=\"R5112\" width=\"1056\" height=\"272\" title=\"\"><\/p>\n<p>&nbsp; &nbsp; &nbsp;<span style=\"color: #339966;\"> &nbsp; 04. Tout d'abord, nous devons savoir comment le signal EC RST est g\u00e9n\u00e9r\u00e9, il est \u00e9mis par la broche H4 de U7000 (ISL9339) \u2192 R7090 \u2192 SMC_RESET_L \u2192 R8592 \u2192 BUF_SMC_RESET_L \u2192 U5000.&nbsp;<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/BUF_SMC_RESET_L.png\" alt=\"BUF_SMC_RESET_L\" width=\"1069\" height=\"233\" title=\"\"><\/p>\n<p>&nbsp; &nbsp; &nbsp; <span style=\"color: #008000;\">&nbsp; 05. Processus de mesure et d'inspection : nous pouvons mesurer la tension sur C5270. La broche #1 de C5270 est \u00e0 0 volt, ce qui est anormal.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/C5270-2.png\" alt=\"C5270\" width=\"1200\" height=\"618\" title=\"\"><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/A1707_Cannot_Boot.png\" alt=\" A1707 Impossible de d\u00e9marrer\" title=\"\"><\/p>\n<\/p>\n<p>Passez ensuite \u00e0 l'U7000, mesurez \u00e0 nouveau la tension sur la broche #1 de R7090. <span style=\"color: #ff0000;\">0 volt<\/span>.<\/p>\n<p>D\u00e9branchez le c\u00e2ble d'alimentation CC et mesurez la valeur de la diode sur R7090 qui n'est que d'environ 30, ce qui est anormal.<\/p>\n<p>Retirez le R7090 et mesurez \u00e0 nouveau les valeurs des diodes, la broche 2 est normale, mais la valeur de la diode sur la broche 1, qui est proche de l'U7000, est encore tr\u00e8s faible.&nbsp;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/Measure_the_diode_value.png\" alt=\"\" title=\"\"><\/p>\n<ul style=\"list-style-type: square;\">\n<li><span style=\"color: #000000;\"><strong>\u00c9tape 3.<\/strong><\/span><span style=\"color: #008080;\"><span style=\"color: #000000;\">&nbsp;<\/span> <span style=\"color: #000000;\">Remplacez l'U7000 par un nouveau, puis assemblez le Macbook et mesurez la tension de r\u00e9initialisation de l'EC \u00e0 3,3V, ce qui est normal. Le MacBook peut \u00eatre d\u00e9marr\u00e9 normalement, et toutes les fonctions fonctionnent bien.<\/span><\/span><\/li>\n<\/ul>\n<p><span style=\"color: #008080;\"><span style=\"color: #000000;\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/U7000-bitmap.png\" alt=\"\" title=\"\"><\/span><\/span><\/p>\n<p><span style=\"color: #008080;\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/U7000.png\" alt=\"\" title=\"\"><\/span><\/p>\n<p><span style=\"color: #000000;\"><strong><\/strong><\/span><\/p>\n<p><span style=\"color: #000000;\"><strong>R\u00e9sum\u00e9<\/strong><\/span><\/p>\n<p><span style=\"color: #333333;\">Le probl\u00e8me du MacBook Pro A1707 qui ne peut pas d\u00e9marrer est caus\u00e9 par le signal EC RESET qui n'est pas OK, et le probl\u00e8me est finalement r\u00e9solu par le remplacement de l'U7000.<\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>Received a MacBook A1707 with cannot boot issue, board number is 820-00281-A. \u25cf Check the Cosmetic The customer said the MacBook cannot be booted, connect with an adapter, and power on to test, totally no response. Then disassemble the MacBook and take out the motherboard to check, there is no water damage trace and the [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":13050,"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-13049","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\/13049","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=13049"}],"version-history":[{"count":0,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/posts\/13049\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/media\/13050"}],"wp:attachment":[{"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/media?parent=13049"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/categories?post=13049"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/tags?post=13049"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}