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如何修复 iPhone 11 Pro Max 的”面容识别不可用“问题 - 主板维修

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How To Fix iPhone 11 Pro Max Face ID Not Available - Motherboard Repair: crwdns2935265:00crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
  • Let’s replace with a new inductor and see how it works.

  • Remove black adhesive around first. Then apply some medium-temp solder paste to the bonding pad. Tin the bonding pad with solder paste with the help of the Soldering Iron at 365℃. Once done, clean with PCB Cleaner.

  • Continue to apply some rosin to the bonding pad. We can see that the damaged inductor is really small. And the replacement inductor is difficult to find.

  • We can solder a zero-ohm resistor instead. Get a zero-ohm resistor in the right position. Solder with Hot Air Gun at 330℃, air flow 1. Clean with PCB Cleaner afterwards.

  • Again, let’s run diode mode measurement of Pin 8 on the infrared camera connector. The measured value is 257, which is normal.

现在让我们换一个新的电感上去。

首先去除周围的黑胶。然后将一些中温锡涂在底座上。在烙铁的帮助下,在 365℃ 下,用焊锡膏给底座上锡。完成后,用洗板水清洗。

在底座上涂抹一些松香。我们可以看到,损坏的电感很小。而替代的电感是很难找到的。

我们可以焊接一个零欧姆的电阻来代替这个电感。把电阻放在正确的位置。用热风枪在 330℃ 下焊接,风量为 1 档。 焊接完成后,用洗板水清洗。

再次测量红外摄像头底座第 8 针的阻值,257,正常了。

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