{"id":12826,"date":"2021-06-15T22:15:00","date_gmt":"2021-06-15T14:15:00","guid":{"rendered":"https:\/\/rewa.tech\/iphone-7-wont-turn-on-with-large-current\/"},"modified":"2024-05-10T15:29:17","modified_gmt":"2024-05-10T07:29:17","slug":"liphone-7-non-si-accende-con-corrente-elevata","status":"publish","type":"post","link":"https:\/\/rewa.tech\/it\/iphone-7-wont-turn-on-with-large-current\/","title":{"rendered":"L'iPhone 7 non si accende con una corrente elevata"},"content":{"rendered":"<p class=\"MsoNormal\"><b><span style=\"font-family: Calibri; font-size: 14pt;\"><\/span><\/b><\/p>\n<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;\"><o_p><\/o_p><\/span><\/b><\/p>\n<p class=\"MsoNormal\"><span style=\"font-family: Calibri;\"><span style=\"font-size: 16px;\">L'iPhone 7 non si accende con una corrente elevata<\/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;\">, una volta che la scheda madre viene collegata all'alimentatore CC.<\/span><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;\"><o_p><\/o_p><\/span><\/p>\n<p class=\"MsoNormal\"><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\"><b><span style=\"font-family: Calibri; font-size: 14pt;\">Risoluzione dei problemi<\/span><\/b><b><span style=\"font-family: Calibri; font-size: 14pt;\"><o_p><\/o_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: Calibri; mso-fareast-font-family: \u5b8b\u4f53; mso-bidi-font-family: 'Times New Roman'; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Una corrente elevata significa che c'\u00e8 un cortocircuito da qualche parte.<\/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 una volta collegata la scheda madre all'alimentatore in corrente continua la corrente sale a un valore molto elevato, possiamo concludere che il problema del cortocircuito si \u00e8 verificato prima dell'accensione del telefono. <\/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;\"><o_p><\/o_p><\/span><\/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;\">T<\/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;\">qui sono gi\u00e0 presenti diversi set di alimentazione pronti all'uso una volta collegati alla batteria o all'alimentatore CC. <\/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;\">Per iPhone 7, ci sono 3 serie di potenze<\/span><\/p>\n<ul>\n<li 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;\">PP_BATT_VCC <\/span><\/li>\n<li 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;\">PP_VDD_MAIN<\/span><\/li>\n<li 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;\">PP_VDD_BOOST<\/span><\/li>\n<\/ul>\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;\">Se uno qualsiasi dei componenti su questi 3 set di guide dovesse andare in cortocircuito, si verificherebbe un problema di corrente elevata. <\/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;\"><o_p><\/o_p><\/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;\">Per questo problema, abbiamo controllato prima la linea PP_BATT_VCC misurando il valore del diodo sul pin 1 del connettore della batteria J2201; il valore era 438, il che \u00e8 normale e significa che la linea PP_BATT_VCC \u00e8 OK.<\/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;\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/iPhone_7_Won_rsquo_t_Turn_On_With_Large_Current.png\" alt=\"L&#039;iPhone 7 non si accende con una corrente elevata\" width=\"1023\" height=\"436\" title=\"\"><\/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;\"><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;\">Quindi abbiamo continuato a controllare la linea PP_VDD_MAIN misurando il valore del diodo sul punto di test TP0408, il valore era 0, questa linea era in cortocircuito.&nbsp;<\/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;\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/iPhone_7_Won_rsquo_t_Turn_On_With_Large_Current_Measure_Diode_Value.png\" alt=\"iPhone 7 non si accende con corrente elevata\" width=\"1135\" height=\"498\" title=\"\"><\/span><\/p>\n<p class=\"MsoNormal\"><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\"><span style=\"font-family: Calibri; font-size: 16px;\">Abbiamo anche controllato la linea PP_VDD_BOOST, anch'essa risultata normale.<\/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;\"><\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"font-family: Calibri; font-size: 16px;\"><\/span><\/p>\n<p class=\"MsoNormal\"><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;\">Quindi controlla attentamente al microscopio i componenti rilevanti sul rail PP_VDD_MAIN.&nbsp;<\/span><\/p>\n<p class=\"MsoNormal\"><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;\">Trova il condensatore C2610 diventato nero (forse bruciato internamente), vedi l'immagine sotto<\/span><\/p>\n<p class=\"MsoNormal\"><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;\"><img decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/C2610_Get_Black.png\" alt=\"L&#039;iPhone 7 non si accende con una corrente elevata\" width=\"696\" height=\"460\" title=\"\"><\/span><\/p>\n<p class=\"MsoNormal\"><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;\">Rimosso C2610 e collegato all'alimentatore DC per testare di nuovo, il cortocircuito era scomparso.<\/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;\">Poi assembla il telefono, il telefono pu\u00f2 essere acceso normalmente, 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;\"><o_p><\/o_p><\/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;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/DC_power_supply.png\" width=\"361\" height=\"334\" alt=\"\" title=\"\">&nbsp;&nbsp;<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/rewa.tech\/wp-content\/uploads\/2024\/04\/Boot_Normally.png\" alt=\"\" width=\"247\" height=\"334\" title=\"\"><\/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;\"><span style=\"color: #0000ff;\"><a href=\"https:\/\/academy.rewa.tech\/courses\/iPhone-7-Motherboard-Repair-Course\"><strong><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;\">Corso di riparazione della scheda madre dell'iPhone 7<\/span><\/strong><\/a><\/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>","protected":false},"excerpt":{"rendered":"<p>Malfunction Phenomenon iPhone 7 Won&rsquo;t Turn On With A Large Current, once the motherboard gets connected with the DC power supply. Trouble Shooting Large current means somewhere is shorted. Because once the motherboard was connected with the DC power supply, the current jumps to a very high value, we can conclude that the short issue [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":12827,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"wpai_generated_summary":"","fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[780],"tags":[],"class_list":["post-12826","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\/12826","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=12826"}],"version-history":[{"count":0,"href":"https:\/\/rewa.tech\/it\/wp-json\/wp\/v2\/posts\/12826\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rewa.tech\/it\/wp-json\/wp\/v2\/media\/12827"}],"wp:attachment":[{"href":"https:\/\/rewa.tech\/it\/wp-json\/wp\/v2\/media?parent=12826"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rewa.tech\/it\/wp-json\/wp\/v2\/categories?post=12826"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rewa.tech\/it\/wp-json\/wp\/v2\/tags?post=12826"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}