{"id":12958,"date":"2021-10-24T22:29:00","date_gmt":"2021-10-24T14:29:00","guid":{"rendered":"https:\/\/rewa.tech\/a1466-2016-version-current-stayed-at-0126a\/"},"modified":"2024-05-10T15:25:05","modified_gmt":"2024-05-10T07:25:05","slug":"a1466-version-2016-en-cours-a-0126a","status":"publish","type":"post","link":"https:\/\/rewa.tech\/fr\/a1466-2016-version-current-stayed-at-0126a\/","title":{"rendered":"Macbook Air A1466 2016 Version ne peut pas d\u00e9marrer avec le courant restant \u00e0 0.126A"},"content":{"rendered":"<p class=\"MsoNormal\"><span lang=\"EN-US\"><strong>Carte m\u00e8re No :<\/strong><span style=\"mso-spacerun: yes;\">&nbsp; <\/span>820-00165-A<o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\"><strong>Dysfonctionnement : <span style=\"mso-spacerun: yes;\">&nbsp;<\/span><\/strong><o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Macbook Air A1466 2016 Version Can Not Boot Up, le courant est pass\u00e9 de 0,03A \u00e0 0,126A, et est rest\u00e9 \u00e0 0,126A.<o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\"><strong>D\u00e9pannage :<\/strong><o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Deux raisons principales peuvent \u00eatre \u00e0 l'origine de ce type de probl\u00e8me.<o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">1. Une partie de l'\u00e9lectricit\u00e9 n'a pas \u00e9t\u00e9 produite ; <o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">2. Le SMC, les donn\u00e9es du BIOS ou d'autres \u00e9l\u00e9ments ont \u00e9t\u00e9 endommag\u00e9s ;<\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Nous avons enlev\u00e9 le couvercle arri\u00e8re et d\u00e9connect\u00e9 la batterie, nous avons connect\u00e9 l'appareil \u00e0 une source de courant continu et nous l'avons mis sous tension, le courant est pass\u00e9 de 0,03A \u00e0 0,126A, et est rest\u00e9 \u00e0 0,126A. Nous avons d\u00e9connect\u00e9 toutes les parties, connect\u00e9 l'alimentation et rallum\u00e9, le courant \u00e9tait le m\u00eame, ce qui signifie que le probl\u00e8me vient de la carte m\u00e8re.<\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/A1466_macbook_repair-1.jpg\" width=\"1200\" height=\"899\" alt=\"\" title=\"\"><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\"><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Nous avons d\u00e9branch\u00e9 l'alimentation, sorti la carte m\u00e8re et v\u00e9rifi\u00e9 la carte m\u00e8re, il n'y avait pas de zone endommag\u00e9e par l'eau ou d'autres zones endommag\u00e9es \u00e9videntes. Nous avons branch\u00e9 l'alimentation et v\u00e9rifi\u00e9 la tension sur les inducteurs.<o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\"><span style=\"mso-spacerun: yes;\">&nbsp;<\/span>PP5V_S4RS3 sur L7520 \u00e9tait \u00e0 5V, normal ; <o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\"><span style=\"mso-spacerun: yes;\">&nbsp;<\/span>PP1V2_S3 sur L7430 \u00e9tait de 1,2V, normal ;<o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\"><span style=\"mso-spacerun: yes;\">&nbsp;<\/span>PP1V05_S0 sur L7630 \u00e9tait de 1,05V, normal ;<o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\"><span style=\"mso-spacerun: yes;\">&nbsp;<\/span>PPVCC_S0_CPU sur L7320 \u00e9tait de 0V, anormal, la valeur normale devrait \u00eatre d'environ 1,8V ; <o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">D'apr\u00e8s les r\u00e9sultats de la mesure, la tension n'a pas \u00e9t\u00e9 g\u00e9n\u00e9r\u00e9e sur L7320, et le courant est rest\u00e9 \u00e0 0,126A.<o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/A1466_macbook_repair-2.jpg\" width=\"1200\" height=\"1191\" alt=\"\" title=\"\"><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Nous avons ouvert le sch\u00e9ma et d\u00e9couvert le circuit qui g\u00e9n\u00e8re la tension connect\u00e9e \u00e0 L7320.<o_p><\/o_p><\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/A1466_macbook_repair-3.jpg\" width=\"1167\" height=\"573\" alt=\"\" title=\"\"><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">D'apr\u00e8s le sch\u00e9ma, nous pouvons voir que la tension PPVCC_S0_CPU sur L7320 est g\u00e9n\u00e9r\u00e9e par les mosfets Q7320 et Q7321 qui sont contr\u00f4l\u00e9s par U7320. U7320 \u00e9tait contr\u00f4l\u00e9 par le CPU power IC U7200 comme le montre le sch\u00e9ma suivant.<o_p><\/o_p><\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/A1466_macbook_repair-4.jpg\" width=\"1160\" height=\"575\" alt=\"\" title=\"\"><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Nous avons continu\u00e9 \u00e0 v\u00e9rifier les conditions de fonctionnement de l'U7200,<o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">PPVIN_S0_CPUVR_VIN \u00e9tait de 8,6V, normal ; <o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">PP5V_ S0_CPUVR_VDD \u00e9tait de 5V, normal ; <o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">CPU_VR_EN \u00e9tait de 0V, anormal, la valeur normale devrait \u00eatre d'environ 1,05V ; <o_p><\/o_p><\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/A1466_macbook_repair-5.jpg\" width=\"1156\" height=\"578\" alt=\"\" title=\"\"><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Le signal CPU_VR_EN provenait de l'unit\u00e9 centrale U0500. Selon la s\u00e9quence temporelle de fonctionnement, le signal CPU_VCCST_PWRGD ne peut \u00eatre envoy\u00e9 que lorsque l'unit\u00e9 centrale re\u00e7oit le signal CPU_VCCST_PWRGD, afin d'activer l'alimentation \u00e9lectrique de l'unit\u00e9 centrale.<o_p><\/o_p><\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/A1466_macbook_repair-6.jpg\" width=\"1112\" height=\"583\" alt=\"\" title=\"\"><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Nous avons continu\u00e9 \u00e0 chercher la source de CPU_VCCST_PWRGD, elle a \u00e9t\u00e9 g\u00e9n\u00e9r\u00e9e par U1930.<o_p><\/o_p><\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/A1466_macbook_repair-7.jpg\" width=\"1145\" height=\"560\" alt=\"\" title=\"\"><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Nous avons connect\u00e9 l'alimentation pour v\u00e9rifier la tension sur CPU_VCCST_PWRGD, la valeur \u00e9tait de 0V, puis nous avons v\u00e9rifi\u00e9 la tension sur la broche 1 de la r\u00e9sistance R1931, la valeur \u00e9tait normale, 1.05V. Nous avons d\u00e9connect\u00e9 l'alimentation et v\u00e9rifi\u00e9 la r\u00e9sistance sur R1931, la valeur \u00e9tait de 10K Ohm, ce qui \u00e9tait \u00e9galement normal, ce qui signifie que le signal CPU_VCCST_PWRGD n'a pas \u00e9t\u00e9 g\u00e9n\u00e9r\u00e9 par U1930.<o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Nous nous sommes connect\u00e9s \u00e0 l'\u00e9lectricit\u00e9 pour v\u00e9rifier les conditions de fonctionnement de l'U1930 :<o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">La tension sur VCC_PP3V3_S5 \u00e9tait de 3,3V, ce qui \u00e9tait normal ;<o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Tension sur<span style=\"mso-spacerun: yes;\">&nbsp; <\/span>PM_SLP_S3_L \u00e9tait de 3,3V, ce qui \u00e9tait \u00e9galement normal ;<o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">La tension sur ALL_SYS_PWRGD \u00e9tait de 0,731V, ce qui \u00e9tait anormal, la valeur normale devant \u00eatre d'environ 3,3V ;<\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">D'apr\u00e8s les r\u00e9sultats des mesures, nous avons conclu que le signal sur ALL_SYS_PWRGD \u00e9tait anormal, de sorte que U1930 ne pouvait pas \u00e9mettre CPU_VCCST_PWRGD, puis nous avons continu\u00e9 \u00e0 rechercher la source du signal ALL_SYS_PWRGD.<o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/A1466_macbook_repair-8.jpg\" width=\"767\" height=\"583\" alt=\"\" title=\"\"><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">ALL_SYS_PWRGD a \u00e9t\u00e9 g\u00e9n\u00e9r\u00e9 \u00e0 partir de P1V8S3_PGOOD<\/span><span style=\"font-family: '\u5fae\u8f6f\u96c5\u9ed1',sans-serif; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma;\">\uff0c<\/span><span lang=\"EN-US\">P5VS4RS3_PGOOD<\/span><span style=\"font-family: '\u5fae\u8f6f\u96c5\u9ed1',sans-serif; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma;\">\uff0c<\/span><span lang=\"EN-US\">P1V05S0_PGOOD<\/span><span style=\"font-family: '\u5fae\u8f6f\u96c5\u9ed1',sans-serif; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma;\">\uff0c<\/span><span lang=\"EN-US\">DDRREG_PGOOD et la r\u00e9sistance R8162 et l'alimentation pull-up PM_SLP_S3_BUF_L. Si l'un des PG est anormal, le signal ALL_SYS_PWRGD sera anormal.<o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/A1466_macbook_repair-9.jpg\" width=\"931\" height=\"585\" alt=\"\" title=\"\"><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Le signal ALL_SYS_PWRGD a \u00e9galement \u00e9t\u00e9 prot\u00e9g\u00e9 par Q8150, et de plus, PP5V_S0<\/span><span style=\"font-family: '\u5fae\u8f6f\u96c5\u9ed1',sans-serif; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma;\">\uff0c<\/span><span lang=\"EN-US\">PP3V3_S0<\/span><span style=\"font-family: '\u5fae\u8f6f\u96c5\u9ed1',sans-serif; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma;\">\uff0c<\/span><span lang=\"EN-US\">PP1V5_S0 doit \u00eatre normal, alors le signal ALL_SYS_PWRGD sera normal.<\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\"> <\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Nous avons connect\u00e9 l'alimentation et v\u00e9rifi\u00e9 la tension sur la broche 1 de R8167, la valeur \u00e9tait de 3,3V, ce qui \u00e9tait normal, la tension sur la broche 2 \u00e9tait de 0,731V, ce qui \u00e9tait anormal. Nous avons d\u00e9connect\u00e9 l'alimentation et v\u00e9rifi\u00e9 la r\u00e9sistance, la valeur \u00e9tait de 10K Ohm, ce qui \u00e9tait normal, ce qui signifie que le probl\u00e8me vient du circuit apr\u00e8s coup qui rend le signal anormal.<o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\"><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Nous avons supprim\u00e9 le mosfet Q8150 pour exclure la possibilit\u00e9 d'un PP5V_S0 anormal.<\/span><span style=\"font-family: '\u5fae\u8f6f\u96c5\u9ed1',sans-serif; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma;\">\uff0c<\/span><span lang=\"EN-US\">PP3V3_S0<\/span><span style=\"font-family: '\u5fae\u8f6f\u96c5\u9ed1',sans-serif; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma;\">\uff0c<\/span><span lang=\"EN-US\">PP1V5_S0, ce qui peut rendre le signal ALL_SYS_PWRGD anormal. Nous avons ensuite v\u00e9rifi\u00e9 la tension sur ALL_SYS_PWRGD apr\u00e8s avoir retir\u00e9 le mosfet Q8150, la valeur \u00e9tait de 3,3V, ce qui \u00e9tait normal.<o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/A1466_macbook_repair-10.jpg\" width=\"1009\" height=\"676\" alt=\"\" title=\"\"><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">Cela signifie que le probl\u00e8me vient de Q8150 qui rend le signal ALL_SYS_PWRGD anormal. Nous avons remplac\u00e9 le mosfet Q8150 et v\u00e9rifi\u00e9 \u00e0 nouveau la tension sur ALL_SYS_PWRGD. La valeur \u00e9tait toujours de 0,731V. Cela signifie que le probl\u00e8me provient de l'un des trois PP5V_S0 d'alimentation.<\/span><span style=\"font-family: '\u5fae\u8f6f\u96c5\u9ed1',sans-serif; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma;\">\uff0c<\/span><span lang=\"EN-US\">PP3V3_S0<\/span><span style=\"font-family: '\u5fae\u8f6f\u96c5\u9ed1',sans-serif; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma;\">\uff0c<\/span><span lang=\"EN-US\">PP1V5_S0.<o_p><\/o_p><\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/11.jpg\" width=\"926\" height=\"579\" alt=\"\" title=\"\"><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">VMON_5V_DIV a \u00e9t\u00e9 g\u00e9n\u00e9r\u00e9 \u00e0 partir de PP5V_S0 via R8151 et R8152, la valeur \u00e9tait de 1,07V, nous avons v\u00e9rifi\u00e9 la tension sur la broche 2 de R8153, la valeur \u00e9tait normale, 1,07V.<span style=\"mso-spacerun: yes;\">&nbsp; <\/span>VMON_3V3_DIV a \u00e9t\u00e9 g\u00e9n\u00e9r\u00e9 \u00e0 partir de PP3V3_S0 via R8158 et R8159, la valeur \u00e9tait de 1,07V, nous avons v\u00e9rifi\u00e9 la tension sur la broche 2 de R8154, la valeur \u00e9tait juste de 0,3V, ce qui \u00e9tait anormal, puis nous avons v\u00e9rifi\u00e9 la broche 1 de R8154, la tension \u00e9tait de 1,07V. Nous avons d\u00e9branch\u00e9 l'alimentation et v\u00e9rifi\u00e9 la r\u00e9sistance sur R8154, la valeur \u00e9tait de 1M Ohm, ce qui \u00e9tait anormal.<o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\"><strong>R\u00e9sum\u00e9<\/strong><o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\">La r\u00e9sistance R8154 \u00e9tait cass\u00e9e, et la r\u00e9sistance \u00e9tait beaucoup plus grande que la normale, ce qui fait que la tension sur ALL_SYS_PWRGD \u00e9tait inf\u00e9rieure \u00e0 0,731V, et que le PPVCC_S0_CPU \u00e9tait \u00e0 0V, nous avons remplac\u00e9 la r\u00e9sistance, et le probl\u00e8me a \u00e9t\u00e9 r\u00e9solu.<o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><span lang=\"EN-US\"><\/span><\/p>\n<p class=\"MsoNormal\"><strong><a href=\"https:\/\/academy.rewa.tech\/\"><span lang=\"EN-US\">Aller \u00e0 l'Acad\u00e9mie REWA pour en savoir plus sur les r\u00e9parations<\/span><\/a><\/strong><\/p>","protected":false},"excerpt":{"rendered":"<p>Motherboard No.:&nbsp; 820-00165-A Malfunction: &nbsp; Macbook Air A1466 2016 Version Can Not Boot Up, the current changed from 0.03A to 0.126A, and stayed at 0.126A. Troubleshooting: There are two main reasons can cause this kind of issue. 1. Some of the power wasn&rsquo;t generated; 2. SMC, BIOS data or other parts was broken; We removed [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":12959,"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-12958","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\/12958","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=12958"}],"version-history":[{"count":0,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/posts\/12958\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/media\/12959"}],"wp:attachment":[{"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/media?parent=12958"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/categories?post=12958"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rewa.tech\/fr\/wp-json\/wp\/v2\/tags?post=12958"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}