{"id":12834,"date":"2021-06-16T21:10:00","date_gmt":"2021-06-16T13:10:00","guid":{"rendered":"https:\/\/rewa.tech\/iphone-7-boot-loop-and-can-not-be-recognized-by-computer\/"},"modified":"2024-05-10T15:29:16","modified_gmt":"2024-05-10T07:29:16","slug":"iphone-7-loop-di-avvio-e-non-puo-essere-riconosciuto-dal-computer","status":"publish","type":"post","link":"https:\/\/rewa.tech\/it\/iphone-7-boot-loop-and-can-not-be-recognized-by-computer\/","title":{"rendered":"Ciclo di avvio dell'iPhone 7 e nessuna connessione con il computer"},"content":{"rendered":"<p class=\"MsoNormal\"><b><span style=\"font-family: Calibri; font-size: 14pt;\">Fenomeno di malfunzionamento <\/span><\/b><b><span style=\"font-family: Calibri; font-size: 14pt;\"><\/p>\n<p><\/span><\/b><\/p>\n<p class=\"MsoNormal\"><span style=\"font-family: Calibri;\"><span style=\"font-size: 16px;\">Ciclo di avvio dell'iPhone 7 e nessuna connessione con il computer<\/span><\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: \u5b8b\u4f53; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-family: 'Times New Roman'; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\"><span style=\"font-family: Calibri;\"><\/span><\/span><\/p>\n<p class=\"MsoNormal\"><b><span style=\"font-family: Calibri; font-size: 14pt;\">Risoluzione dei problemi<\/span><\/b><b><span style=\"font-family: Calibri; font-size: 14pt;\"><\/p>\n<p><\/span><\/b><\/p>\n<p class=\"MsoNormal\" style=\"line-height: 20.0000pt; mso-line-height-rule: exactly;\"><span style=\"mso-spacerun: 'yes'; font-family: \u5b8b\u4f53; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-bidi-font-family: 'Times New Roman'; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\"><span style=\"font-family: Calibri;\">B<\/span><\/span><span style=\"mso-spacerun: 'yes'; font-family: Calibri; mso-fareast-font-family: \u5b8b\u4f53; mso-bidi-font-family: 'Times New Roman'; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Poich\u00e9 il telefono non pu\u00f2 essere collegato al computer, possiamo concludere che il problema potrebbe derivare dal circuito USB. Estrarre la scheda madre e controllare se ci sono corrosioni o deformazioni, la scheda madre sembra buona. <\/span><\/p>\n<p class=\"MsoNormal\" style=\"line-height: 20.0000pt; mso-line-height-rule: exactly;\"><span style=\"font-family: Calibri; font-size: 12pt;\">Continuare a misurare i valori dei diodi sui condensatori intorno al circuito integrato USB U4001, il risultato misurato \u00e8 il seguente<\/span><\/p>\n<ul>\n<li class=\"MsoNormal\" style=\"line-height: 20.0000pt; mso-line-height-rule: exactly;\"><span style=\"font-family: Calibri; font-size: 12pt;\">Il valore del diodo sul condensatore C4004 \u00e8 274<\/span><\/li>\n<li class=\"MsoNormal\" style=\"line-height: 20.0000pt; mso-line-height-rule: exactly;\"><span style=\"font-family: Calibri; font-size: 12pt;\">Il valore del diodo su C4002 \u00e8 393<\/span><\/li>\n<li class=\"MsoNormal\" style=\"line-height: 20.0000pt; mso-line-height-rule: exactly;\"><span style=\"font-family: Calibri; font-size: 12pt;\">Il valore del diodo su L4021 e L4022 \u00e8 lo stesso valore 693<\/span><\/li>\n<\/ul>\n<p class=\"MsoNormal\" style=\"line-height: 20.0000pt; mso-line-height-rule: exactly;\"><span style=\"font-family: Calibri; font-size: 12pt;\">Quindi tutti i valori dei diodi sono normali<\/span><\/p>\n<p class=\"MsoNormal\" style=\"line-height: 20.0000pt; mso-line-height-rule: exactly;\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/iphone-7-boot-loop-and-can-not-be-recognized-by-computer-7th12.png\" alt=\"\" width=\"298\" height=\"215\" title=\"\">&nbsp; &nbsp;<img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/iphone-7-boot-loop-and-can-not-be-recognized-by-computer-vzpil.png\" alt=\"\" width=\"322\" height=\"213\" title=\"\"><span style=\"font-family: Calibri; font-size: 12pt;\"><\/span><\/p>\n<p class=\"MsoNormal\" style=\"line-height: 20.0000pt; mso-line-height-rule: exactly;\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/iphone-7-boot-loop-and-can-not-be-recognized-by-computer-d3of4.png\" alt=\"\" title=\"\">&nbsp; &nbsp;&nbsp;<img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/iphone-7-boot-loop-and-can-not-be-recognized-by-computer-unec3.png\" alt=\"\" width=\"263\" height=\"201\" title=\"\"><span style=\"font-family: Calibri; font-size: 12pt;\"><\/span><\/p>\n<p class=\"MsoNormal\" style=\"line-height: 20.0000pt; mso-line-height-rule: exactly;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/iphone-7-boot-loop-and-can-not-be-recognized-by-computer-4lnkm.png\" alt=\"\" width=\"682\" height=\"383\" title=\"\"><span style=\"font-family: Calibri; font-size: 12pt;\"><\/span><\/p>\n<p class=\"MsoNormal\" style=\"line-height: 20.0000pt; mso-line-height-rule: exactly;\"><span style=\"font-family: Calibri; font-size: 12pt;\"><\/span><\/p>\n<p class=\"MsoNormal\" style=\"line-height: 20.0000pt; mso-line-height-rule: exactly;\"><span style=\"mso-spacerun: 'yes'; font-family: Calibri; mso-fareast-font-family: \u5b8b\u4f53; mso-bidi-font-family: 'Times New Roman'; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Infine, abbiamo controllato il condensatore C4005, il cui valore era pari a 0, un valore anomalo.<\/span><\/p>\n<p class=\"MsoNormal\" style=\"line-height: 20.0000pt; mso-line-height-rule: exactly;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/iphone-7-boot-loop-and-can-not-be-recognized-by-computer-qjqls.png\" alt=\"L&#039;iPhone 7 si avvia in loop e non pu\u00f2 essere riconosciuto dal computer\" width=\"560\" height=\"311\" title=\"\"><span style=\"mso-spacerun: 'yes'; font-family: Calibri; mso-fareast-font-family: \u5b8b\u4f53; mso-bidi-font-family: 'Times New Roman'; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\"><\/span><\/p>\n<p class=\"MsoNormal\" style=\"line-height: 20.0000pt; mso-line-height-rule: exactly;\"><span style=\"mso-spacerun: 'yes'; font-family: Calibri; mso-fareast-font-family: \u5b8b\u4f53; mso-bidi-font-family: 'Times New Roman'; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Rimuovendo il condensatore e misurando nuovamente il valore del diodo, il valore era ancora pari a 0.&nbsp;<\/span><span style=\"font-family: Calibri; font-size: 12pt;\">Significa che il problema non dipende da C4005.<\/span><\/p>\n<p class=\"MsoNormal\" style=\"line-height: 20.0000pt; mso-line-height-rule: exactly;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/iphone-7-boot-loop-and-can-not-be-recognized-by-computer-h5exy.png\" alt=\"\" width=\"560\" height=\"239\" title=\"\"><span style=\"font-family: Calibri; font-size: 12pt;\"><\/span><\/p>\n<p class=\"MsoNormal\" style=\"line-height: 20.0000pt; mso-line-height-rule: exactly;\"><span style=\"font-family: Calibri; font-size: 12pt;\"><\/span><\/p>\n<p class=\"MsoNormal\" style=\"line-height: 20.0000pt; mso-line-height-rule: exactly;\"><span style=\"font-family: Calibri; font-size: 12pt;\"> Questo condensatore \u00e8 stato collegato al circuito integrato USB e, dopo aver controllato la bitmap, il problema \u00e8 dovuto al circuito integrato USB U4001.<\/span><\/p>\n<p class=\"MsoNormal\" style=\"line-height: 20.0000pt; mso-line-height-rule: exactly;\"><span style=\"mso-spacerun: 'yes'; font-family: Calibri; mso-fareast-font-family: \u5b8b\u4f53; mso-bidi-font-family: 'Times New Roman'; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Rimuovendo l'IC USB e controllando il valore del diodo sulla relativa piazzola E6, il cortocircuito \u00e8 scomparso. Abbiamo quindi sostituito un altro circuito integrato USB e l'abbiamo testato di nuovo, senza alcun ciclo di avvio e con la possibilit\u00e0 di collegarlo al computer, problema risolto.<\/span><span style=\"mso-spacerun: 'yes'; font-family: Calibri; mso-fareast-font-family: \u5b8b\u4f53; mso-bidi-font-family: 'Times New Roman'; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\"><\/p>\n<p><\/span>.<\/p>\n<p class=\"MsoNormal\" style=\"line-height: 20.0000pt; mso-line-height-rule: exactly;\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/iphone-7-boot-loop-and-can-not-be-recognized-by-computer-mrzkv.png\" alt=\"\" title=\"\"><span style=\"mso-spacerun: 'yes'; font-family: Calibri; mso-fareast-font-family: \u5b8b\u4f53; mso-bidi-font-family: 'Times New Roman'; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\"><\/span><\/p>\n<p class=\"MsoNormal\" style=\"line-height: 20.0000pt; mso-line-height-rule: exactly;\"><span style=\"mso-spacerun: 'yes'; font-family: Calibri; mso-fareast-font-family: \u5b8b\u4f53; mso-bidi-font-family: 'Times New Roman'; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\"><\/span><\/p>\n<p class=\"MsoNormal\" style=\"line-height: 20.0000pt; mso-line-height-rule: exactly;\"><b><span style=\"font-family: Calibri; font-size: 14pt;\">Sintesi<\/span><\/b><span style=\"mso-spacerun: 'yes'; font-family: Calibri; mso-fareast-font-family: \u5b8b\u4f53; mso-bidi-font-family: 'Times New Roman'; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\"><\/span><\/p>\n<p class=\"MsoNormal\" style=\"line-height: 20.0000pt; mso-line-height-rule: exactly;\"><span style=\"font-family: Calibri;\"><span style=\"font-size: 16px;\">Per i telefoni con pi\u00f9 di un problema, possiamo concentrarci sul controllo di un solo problema. Ad esempio, in questo caso possiamo concentrarci sul controllo del problema della connessione USB, misurando le condizioni di funzionamento dell'USB e controllando il valore del diodo sulle piazzole del PCB, per poi scoprire la causa principale che provoca l'assenza di connessione.<\/span><\/span><\/p>\n<p class=\"MsoNormal\" style=\"line-height: 20.0000pt; mso-line-height-rule: exactly;\"><span style=\"font-family: Calibri;\"><span style=\"font-size: 16px;\"><\/span><\/span><\/p>\n<p class=\"MsoNormal\"><strong><a href=\"https:\/\/academy.rewa.tech\/courses\/iPhone-7-Motherboard-Repair-Course\"><u><span class=\"15\" style=\"font-family: Calibri; color: #0000ff; letter-spacing: 0pt; font-size: 12pt; background: #bfe6ff;\">Corso di riparazione della scheda madre dell'iPhone 7<\/span><\/u><\/a><\/strong><span style=\"mso-spacerun: 'yes'; font-family: Calibri; mso-fareast-font-family: \u5b8b\u4f53; mso-bidi-font-family: 'Times New Roman'; font-size: 10.5000pt; mso-font-kerning: 1.0000pt;\"><\/p>\n<p><\/span>.<\/p><\/p>","protected":false},"excerpt":{"rendered":"<p>Malfunction Phenomenon iPhone 7 Boot Loop and No Connection With Computer Trouble Shooting Because the phone can&rsquo;t be connected to the computer, we can conclude that the problem might be from the USB circuit. Take out the motherboard and check if there is any corrosion or deformation, the motherboard looks good. Continue to measure the [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":12835,"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-12834","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-iphone-repair-cases"],"_links":{"self":[{"href":"https:\/\/rewa.tech\/it\/wp-json\/wp\/v2\/posts\/12834","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rewa.tech\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rewa.tech\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rewa.tech\/it\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/rewa.tech\/it\/wp-json\/wp\/v2\/comments?post=12834"}],"version-history":[{"count":0,"href":"https:\/\/rewa.tech\/it\/wp-json\/wp\/v2\/posts\/12834\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rewa.tech\/it\/wp-json\/wp\/v2\/media\/12835"}],"wp:attachment":[{"href":"https:\/\/rewa.tech\/it\/wp-json\/wp\/v2\/media?parent=12834"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rewa.tech\/it\/wp-json\/wp\/v2\/categories?post=12834"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rewa.tech\/it\/wp-json\/wp\/v2\/tags?post=12834"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}