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Huawei P20 Maintenance Manual

Huawei P20
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EML-L29V100R001 Advanced Maintenance Manual V2.1
INTERNAL
2019-6-25
Page 35 of 67
4.7 Compass Failure
4.7.1 Maintenance Process
Compass failure
No
Does U2604
have cosmetic defects or soldering
issues?
Replace or re-solder
U2604
Yes
No
Are all the sensors
(photoreceptor, accelerometer,
and gyroscope) on the I2C0
circuit abnormal?
Replace U2601
Yes
No
Do any
components on the I2C0
circuit have cosmetic defects or
soldering issues?
Replace or re-solder
the faulty components
No
Yes
Is the sensor
power supply normal (C2603)?
If there are no
soldering issues,
replace U1000
Is the I2C0 signal
normal (J2901)?
If there are no
soldering issues,
replace U300
Replace the faulty
sensor
No
Yes
Yes
No
Ask PCBA process
engineers to analyze
the cause
Because all sensor I2Cs are mounted to the I2C0 circuit, choose a proper network for the test.

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Huawei P20 Specifications

General IconGeneral
Panel typeTFT
Screen shapeFlat
Pixel density428 ppi
Second displayNo
Display diagonal5.8 \
Touch technologyMulti-touch
Touchscreen typeCapacitive
Display resolution2244 x 1080 pixels
Native aspect ratio19:9
Rounded display cornersYes
Display number of colors16 million colors
Processor cores4
Processor familyHi-Silicon
Processor frequency2.36 GHz
Coprocessor frequency1.8 GHz
Processor architectureARM Cortex-A73
Coprocessor architectureARM Cortex-A53
RAM capacity4 GB
Compatible memory cardsNot supported
Internal storage capacity128 GB
Flash typeLED
Rear camera typeDual camera
Front camera typeSingle camera
Video recording modes1080p, 2160p
Rear camera aperture number1.8
Front camera aperture number2
Rear camera resolution (numeric)12 MP
Front camera resolution (numeric)24 MP
Second rear camera aperture number1.6
Second rear camera resolution (numeric)20 MP
4G standardLTE
2G standardsGSM
3G standardsWCDMA
SIM card typeNanoSIM
Wi-Fi standards802.11a, Wi-Fi 5 (802.11ac), 802.11b, 802.11g, Wi-Fi 4 (802.11n)
Bluetooth version4.2
Bluetooth profilesA2DP, APT-X
SIM card capability-
Mobile network generation4G
Subscription typeNo subscription
USB version3.2 Gen 1 (3.1 Gen 1)
USB connector typeUSB Type-C
HDMI ports quantity0
Multimedia Messaging Service (MMS)Multimedia Messaging Service (MMS) is a standard way to send messages that include multimedia content to and from a mobile phone over a cellular network
Form factorBar
Product colorBlue
ThemesWallpapers
Graphics cardMali-G72 MP12
PersonalizationIcons, Menu, Shortcuts
Personal info management (PIM)Alarm clock, Calculator, Calendar, Notes
Speakersstereo
Audio formats supported3GP, AAC, APE, FLAC, MIDI, MP3, OGG, WAV
Video formats supported3G2, 3GP, ASF, H.264, MKV, MP4, WEBM
PlatformAndroid
Operating system installedAndroid 8.1
Talk time (3G)- h
Battery capacity3400 mAh
Battery recharge time1.5 h
Interface adapters includedUSB Type-C - 3.5mm
Weight and Dimensions IconWeight and Dimensions
Depth7.65 mm
Width70.8 mm
Height149.1 mm
Weight165 g

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