Huawei P40 Pro camera cannot be opened for repair

Huawei P40 Pro camera cannot be opened for repair

Machine model: Huawei P40 Pro
Malfunction: Camera can’t be used, there is no sound, WiFi and Bluetooth are not available at the same time.
Maintenance process:

existMobile phone repairIf there is such a multifunctional fault at the same time, then the cause of the fault must be pointing to one place. One of their common working conditions can’t be met, so by looking for their identical VCC circuit and signal circuit, we can determine the approximate fault cause and maintenance direction.

Huawei P40 Pro camera cannot be opened for repair Figure 1.

First, we open Xinzhizao Soft drawing software.
The first step is to look up the VCC condition of the camera. We find that the VCC of the camera all comes from the same chip.

Huawei P40 Pro camera cannot be opened for repair Figure 2.

Huawei P40 Pro camera cannot be opened for repair Figure 3.

Secondly, find the schematic of this chip on schematic. Looking at the drawings, we find that this chip is called CAM_PWR, that is, camera power supply, which is commonly called camera schematic by Lao shifu. It has four LDO VCC channels, which are respectively for main MOSFET and front MOSFET VCC.

Huawei P40 Pro camera cannot be opened for repair Figure 4.

In the third step, after determining the VCC lines, measure these VCC lines on the motherboard, and then you can determine where the problem is. It was finally determined that this chip Inveracious Soldering didn’t work, so it didn’t output LDO VCC to the camera.
Maintenance summary: Huawei P40 Pro mobile phone Camera doesn’t work, no sound, no WiFi and no Bluetooth, which is most likely caused by camera MOSFET. First of all, measure all the pin bits of the main Camera and the rear Camera BTB connector to see if there is Camera abnormality or VCC missing. If there is no VCC, trace back to the camera power supply to see if its working conditions are available. If not,And then respond to its superior leaders.