{"id":2306,"date":"2021-09-06T10:13:48","date_gmt":"2021-09-06T10:13:48","guid":{"rendered":"http:\/\/192.168.2.19:8666\/?p=1"},"modified":"2024-10-10T15:01:49","modified_gmt":"2024-10-10T07:01:49","slug":"como-arreglar-el-iphone-11-no-se-enciende-con-mucha-corriente","status":"publish","type":"post","link":"https:\/\/rewa.tech\/es\/how-to-fix-iphone-11-won-t-turn-on-with-large-current\/","title":{"rendered":"El iPhone 11 Pro no se enciende - Gu\u00eda de reparaci\u00f3n profesional"},"content":{"rendered":"\n

Hello everyone! Our course today is about repairing an iPhone 11 Pro that won\u2019t turn on.<\/p>\n\n\n\n

Press the power button. The phone won\u2019t turn on.<\/p>\n\n\n\n

\"How<\/figure>\n\n\n\n

Disassemble and Test<\/h2>\n\n\n\n

Then we disassemble the phone and test. <\/p>\n\n\n\n

Remove the two pentalobe screws at the bottom edge. <\/p>\n\n\n\n

Pull up on the small nub on the Suction Cup to lift the screen. <\/p>\n\n\n\n

Insert a Pry Piece when there is a gap and slide it along the gap.<\/p>\n\n\n\n

\"How<\/figure>\n\n\n\n

After the screen is lifted, take the shielding covers off. <\/p>\n\n\n\n

Disconnect the battery and remove the screen. Connect the motherboard with the Power Cable. <\/p>\n\n\n\n

The ammeter shows a large current of 3.1A.<\/p>\n\n\n\n

\"How<\/figure>\n\n\n\n

Disconnect the flex cables. Remove the SIM card tray. <\/p>\n\n\n\n

Detach the motherboard. Connect the motherboard with the Power Cable again. <\/p>\n\n\n\n

The ammeter still shows a large current of 3.1A. <\/p>\n\n\n\n

It indicates that the large current has nothing to do with other flex cables. <\/p>\n\n\n\n

The fault is on the motherboard.<\/p>\n\n\n\n

\"How<\/figure>\n\n\n\n

Diode Mode Measurement<\/h2>\n\n\n\n

Run diode mode measurement of pin 1 on the J7010 of the battery connector. <\/p>\n\n\n\n

The diode value is 0. It indicates that the main power supply circuit is shorted to the ground. <\/p>\n\n\n\n

Since the circuit simultaneously supplies power for the logic board and signal board, we need to separate the motherboard to locate the fault.<\/p>\n\n\n\n

\"How<\/figure>\n\n\n\n

Motherboard Separation<\/h2>\n\n\n\n

Remove foam on the motherboard. <\/p>\n\n\n\n

Heat the back of the motherboard with Hot Air Gun at 240 degrees celsius. <\/p>\n\n\n\n

Remove the shielding paper. <\/p>\n\n\n\n

Put the motherboard on the Heating Platform<\/a>. <\/p>\n\n\n\n

To make it easier to remove the logic board after separation, drive a screw on the logic board. <\/p>\n\n\n\n

Set the temperature of the Heating Platform to 185 degrees celsius. <\/p>\n\n\n\n

Clamp the screw to remove the logic board when the temperature has risen to 185 degrees celsius. Remove the signal board.<\/p>\n\n\n\n

\"How<\/figure>\n\n\n\n
\"How<\/figure>\n\n\n\n

Diode Mode Measurement<\/h2>\n\n\n\n

Run diode mode measurement of pin 286 on the signal board. The diode value is 0. <\/p>\n\n\n\n

It indicates that the main power supply of the signal board is shorted to the ground. <\/p>\n\n\n\n

Measure pin 286 on the logic board. <\/p>\n\n\n\n

The diode value is 363 which means the logic board is normal.<\/p>\n\n\n\n

\"How<\/figure>\n\n\n\n
\"How<\/figure>\n\n\n\n

Open the bitmap. We can see there are many associated components on the main power supply circuit.<\/p>\n\n\n\n

\"How<\/figure>\n\n\n\n

Rosin Detecting<\/h2>\n\n\n\n

Next, we need to locate the faulty component with rosin detecting. <\/p>\n\n\n\n

Remove thermal grease with a Sculpture Knife.<\/p>\n\n\n\n

Dip rosin with Soldering Iron at 365 degrees celsius. <\/p>\n\n\n\n

Smoke rosin on the signal board. Set the direct current supply to 4.1V. <\/p>\n\n\n\n

Connect the positive and negative anode of the direct current supply with multimeter probes. <\/p>\n\n\n\n

Connect the black probe to the ground. <\/p>\n\n\n\n

Connect the red probe to pin 286 on the signal board. <\/p>\n\n\n\n

We can see rosin on C1200 K has melted. It indicates that the capacitor is damaged.<\/p>\n\n\n\n

\"How<\/figure>\n\n\n\n
\"How<\/figure>\n\n\n\n

Then we heat it with Hot Air Gun at 350 degrees celsius. Remove the capacitor with tweezers.<\/p>\n\n\n\n

\"How<\/figure>\n\n\n\n

Clean rosin on the signal board with PCB Cleaner. Run a second diode mode measurement. The diode value returns to a normal value of 327.<\/p>\n\n\n\n

\"How<\/figure>\n\n\n\n
\"How<\/figure>\n\n\n\n

Motherboard Recombination<\/h2>\n\n\n\n

Smear rosin with Soldering Iron and solder wick at 365 degrees celsius to remove tin on the bonding pad.<\/p>\n\n\n\n

Clean the signal board with PCB Cleaner. Remove tin and clean the logic board with the same method.<\/p>\n\n\n\n

\"How<\/figure>\n\n\n\n

Attach the signal board to the Reballing Platform. <\/p>\n\n\n\n

Put the Reballing Stencil in position. To prevent the solder paste from flowing into the motherboard crevices, insert a metal plate. <\/p>\n\n\n\n

Apply a layer of low-temperature Solder Paste. <\/p>\n\n\n\n

Remove the Reballing Stencil.<\/p>\n\n\n\n

\"How<\/figure>\n\n\n\n

Put the signal board on the Heating Platform at 185 degrees celsius to heat. <\/p>\n\n\n\n

After the solder balls are formed, turn the power off and cool the motherboard for 5 minutes. <\/p>\n\n\n\n

Apply some Paste Flux. <\/p>\n\n\n\n

Align the logic board with the signal board. <\/p>\n\n\n\n

Keep heating on the Heating Platform at 185 degrees celsius. <\/p>\n\n\n\n

When the temperature reaches 185 degrees celsius, keep heating for 1 minute. <\/p>\n\n\n\n

This step is to ensure that the logic board and the signal board fit closely.<\/p>\n\n\n\n

\"How<\/figure>\n\n\n\n
\"How<\/figure>\n\n\n\n
\"How<\/figure>\n\n\n\n

Testing<\/h2>\n\n\n\n

Connect the motherboard with the Power Cable. <\/p>\n\n\n\n

Short to the ground of the J7700 pin 12. The boot current becomes normal. <\/p>\n\n\n\n

Put the motherboard on the phone. <\/p>\n\n\n\n

Connect the flex cables. Connect the screen and battery. <\/p>\n\n\n\n

Because the battery is dead. Plug the charging cable and the phone turns on normally.<\/p>\n\n\n\n

\"How<\/figure>\n\n\n\n
\"How<\/figure>\n","protected":false},"excerpt":{"rendered":"

Aprende a solucionar iPhone 11 Pro que no enciende por problema de corriente alta. Gu\u00eda paso a paso para profesionales.<\/p>","protected":false},"author":1,"featured_media":2891,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"https:\/\/s.rewa.tech\/image\/36425acd-0e00-40b0-8db6-8b23223b629b-iPhone%2011%20Pro%20won%27t%20%5B00_00_09%5D%5B20210906-095754%5D.jpg","fifu_image_alt":"","footnotes":""},"categories":[16,5,13],"tags":[21,243,244],"class_list":["post-2306","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-guide","category-how-to","tag-iphone","tag-iphone-11-pro","tag-repair-guide"],"_links":{"self":[{"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/posts\/2306","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/comments?post=2306"}],"version-history":[{"count":0,"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/posts\/2306\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/media\/2891"}],"wp:attachment":[{"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/media?parent=2306"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/categories?post=2306"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rewa.tech\/es\/wp-json\/wp\/v2\/tags?post=2306"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}