Huawei P20 Maintenance Manual page 4

4.6.1 Maintenance Process ............................................................................................................................. 33
4.6.2 Maintenance Principle........................................................................................................................... 34
4.7 Compass Failure ............................................................................................................................................. 35
4.7.1 Maintenance Process ............................................................................................................................. 35
4.7.2 Maintenance Principle........................................................................................................................... 36
4.8 Hall Sensor Failure ......................................................................................................................................... 37
4.8.1 Maintenance Process ............................................................................................................................. 37
4.8.2 Maintenance Principle........................................................................................................................... 37
4.9 Motor Failure ................................................................................................................................................. 38
4.9.1 Maintenance Process ............................................................................................................................. 38
4.9.2 Maintenance Principle........................................................................................................................... 39
4.10 Receiver Failure ........................................................................................................................................... 40
4.10.1 Maintenance Process ........................................................................................................................... 40
4.10.2 Maintenance Principle ......................................................................................................................... 41
4.11 Speaker Failure ............................................................................................................................................. 42
4.11.1 aintenance Process .............................................................................................................................. 42
4.11.2 Maintenance Principle ......................................................................................................................... 42
4.12 Microphone Failure ...................................................................................................................................... 43
4.12.1 Maintenance Process ........................................................................................................................... 43
4.12.2 Maintenance Principle ......................................................................................................................... 44
4.13 Headset Failure ............................................................................................................................................. 45
4.13.1 Maintenance Process ........................................................................................................................... 45
4.13.2 Maintenance Principle ......................................................................................................................... 46
4.14 Wi-Fi and Bluetooth Failure ......................................................................................................................... 47
4.14.1 Maintenance Process ........................................................................................................................... 47
4.14.2 Maintenance Principle ......................................................................................................................... 47
4.15 GPS Failure .................................................................................................................................................. 49
4.15.1 Maintenance Process ........................................................................................................................... 49
4.15.2 Maintenance Principle ......................................................................................................................... 50
4.16 RF Failure (CDMA) ..................................................................................................................................... 51
4.16.1 Maintenance Process (Transmission) .................................................................................................. 51
4.16.2 Maintenance Principle (Transmission) ................................................................................................ 52
4.16.3 Maintenance Process (Reception) ....................................................................................................... 53
4.16.4 Maintenance Principle (Reception) ..................................................................................................... 54
4.17 RF Failure (WCDMA) ................................................................................................................................. 55
4.17.1 Maintenance Process (Transmission) .................................................................................................. 55
4.17.2 Maintenance Principle (Transmission) ................................................................................................ 56
4.17.3 Maintenance Process (Reception) ....................................................................................................... 57
4.17.4 Maintenance Principle (Reception) ..................................................................................................... 58
4.18 RF Failure (GSM) ........................................................................................................................................ 59
4.18.1 Maintenance Process (Transmission) .................................................................................................. 59
4.18.2 Maintenance Principle (Transmission) ................................................................................................ 60
2019-6-25
EML-L29V100R001 Advanced Maintenance Manual V2.1
Huawei Confidential
INTERNAL
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