“Daily Mobile Maintenance Class” iphone8p WeChat video does not send words

iphone8p WeChat video does not send words

Fault description

The front -line customer sent to the maintenance department an iPhone8p machine customer describes machine WeChat video voice normal call

After entering the water, you can’t go to the video to chat, please help the master to see it

Fault analysis

Through the customer describing this iPhone8p machine failure, the water inlet causes normal video to chat with the water inlet machine.

Solution

1. First exclude external mating issues

「日常手机维修小课堂」iPhone8P微信视频不送话

2. Observe the corrosion of the motherboard and find that there is corrosion around the tail plug

3. Pick off the corrosive capacitor C6454 to measure this line is normal

4. C6454 This line is an insurance inductance FL6454 ​​on this line of audio.

「日常手机维修小课堂」iPhone8P微信视频不送话

5. Installation Test machines can chat normally

iphone8p no 4G

Traveling to the maintenance department of the iPhone8p machine customer to describe the normal use of the machine before the machine, the power amplifier is replaced by 4G, the power amplifier is replaced by 4G

Through the customer describing this iPhone8p machine failure, after a heavy fall, the card that can be changed without 4G.

1. First use the schematic diagram to measure the working conditions of the baseband baseband power supply voltage clock reset, etc.

「日常手机维修小课堂」iPhone8P微信视频不送话

2. Through the measurement of the 38.4 clock virtual welding of the Y401E baseband power supply, the baseband power supply is not normalized

3. Reinstall the Y401E clock module

「日常手机维修小课堂」iPhone8P微信视频不送话

4. Last test machine 4G normal use

Fault description

Fault analysis

Solution

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