HUAWEI Mate 30 has no ringtone

HUAWEI Mate 30 has no ringtone

Machine model: HUAWEI Mate 30

Malfunction: The customer described HUAWEI Mate 30 as having no ringtone. It was taken for repair, but it was not repaired.

Maintenance process: Get the mobile phone and turn it on. Turn on the ringtone and play it. There is no sound.

HUAWEI Mate 30 has no ringtone Figure 1.

Dismantle the mainboard, and find that the last maintenance master has repaired the audio part, and the bottom of the audio chip is also connected with tin. Deal with the ringtone chip part and replace it with a ringtone chip, and the boot test failure remains the same.

HUAWEI Mate 30 has no ringtone Figure 2.

According to the maintenance experience, the upper board has two parts: audio and NFC. Virtual welding in the middle layer will cause the audio part to not work, and NFC will not work normally. Once again, it was found that the mobile phone did not have NFC, and it was determined that it was the problem of virtual soldering in the middle layer.

HUAWEI Mate 30 has no ringtone Figure 3.

So directly remove the upper board, replant the tin, and then put the motherboard back into the mobile phone.

HUAWEI Mate 30 has no ringtone Figure 4.

HUAWEI Mate 30 has no ringtone Figure 5.

The mobile phone is rebooted and tested. The ringtone can play normally, there is a sound, the fault is perfectly repaired, and the maintenance is over.