Hall Sensor Failure; Maintenance Process; Maintenance Principle - Huawei P20 Maintenance Manual
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Also See for P20:
- User manual (149 pages) ,
- Basic manual (141 pages) ,
- User manual (71 pages)
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4.8 Hall Sensor Failure
4.8.1 Maintenance Process
Perform cross verification. Is
the sub-board faulty?
Perform cross verification. Is
the PCBA faulty
Is the power supply of
sensor_1v8 normal?
Measure the interrupt signal
of the fourth pin of U200 (on
the sub-board)
4.8.2 Maintenance Principle
2019-6-25
EML-L29V100R001 Advanced Maintenance Manual V2.1
Yes
No
Yes
No
Yes
Huawei Confidential
Replace the antenna sub-
board
Replace U1000
Replace the SOC (U300)
INTERNAL
Page 37 of 67
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