Xiaomi Mi 10T Pro Microphone Does Not Work Repair

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Received a Xiaomi Mi 10T Pro Microphone does not work, the issue is caused by rain water damage when riding the motorbike outside.

pms 1602299442 9122460

Model: Xiaomi Mi 10T Pro 5G

Announced: 2020, September 30

Defect Phenomenon

  1. screen with a verticle line
  2. as the client described, the microphone does not work when making voice call (like use WeChat, WhatsApp, etc. the other side cannot hear the voice)

01 screen line

Troubleshooting

First, let’s disassemble the phone and take out the motherboard carefully.

02 Take out the motherboard carefully

The motherboard looks fine, there’s no obvious water damaged signs. Only the top location where the microphone located with some corrosive damage

03 mic corrosive

Let’s check under the microscope, both sides of the motherboard with corrosions

04 This is the corrosive

05 both sides with corrosive damage

Clean the corrosive areas with PCB cleaner first, then remove the shielding cover on the top microphone with tweezers and hot air gun.

06 with tweezers and hot air gun

After removing the shielding cover we can see the microphone is corrosive already, try to replace the microphone with a new one, then the issue would be resolved.

07 After removing the shielding cover we can see the microphone is corrosive already

Repair Process

Remove the microphone with the hot air gun

08 remove the microphone with hot air gun

Then clean the pads on the PCB with solder mask and tin paste

09 Clean the pads on the PCB with solder mask and tin paste

After that, clean the pads thoroughly with PCB cleaner to ensure there is no extra solder paste, because if the solder paste seep into the microphone will cause the voice recording function failure.

Heat with the hot air gun directly to melt the tin paste and get the new microphone soldered

11 Heat with hot air gun directly to melt the tin paste and get the new microphone soldered

After that, assemble the phone to have a test.

For Xiaomi, we can dial *#*#64663## to get into the test interface. After testing, both the main microphone and the top microphone works normally.

12 The main microphone and vice microphone are all tested OK

Now we can solder back the shielding cover on the microphone and assemble the phone

Mi 10T Pro Microphone Does Not Work

Final Test

Get the phone well assembled and test with WeChat voice call again, the phone call voice can be heard by the other side. Issue get fixed perfectly by the top microphone chip replacement.

Visit REWA Academy to learn more repair skills

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REWA Academy

As an enthusiastic educator and expert in mobile technology, REWA Academy has dedicated its career to empowering individuals through technical education. With a keen focus on cellphone repairs, they have developed comprehensive online and offline courses at REWA Academy. Their expertise spans a wide array of areas, including iPhone repair training, phone hardware, software, and advanced troubleshooting techniques. Through their writings, they aim to demystify mobile technology complexities, making it accessible and understandable for both novices and professionals in the field.

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