Huawei P20 - Page 24

EML-L29V100R001 Advanced Maintenance Manual V2.1
INTERNAL
2019-6-25
Huawei Confidential
Page 24 of 67
Figure 4-4 Charging failure maintenance principle 3
Test Item
Test Point
Network
Normal Standard
TP1 (no actual test point; resistance rest)
VCHG_USB
5 V or 0 V
TP2
VCHG_USB_CON
5 V
TP3 (no actual test point; you can test the
pull-up resistor)
I2C6_SCL
A waveform is available after
charging is enabled.
TP4 (no actual test point; you can test the
pull-up resistor)
I2C6_SDA
A waveform is available
after charging is enabled.