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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 61 of 67
4.19 RF Failure (TDS/LTE)
4.19.1 Maintenance Process (Transmission)
LTE RF transmission failure
Check whether the RF
connection cable is normal
and whether the antenna
spring is in good contact
End
Replace U3202
Replace U3401, U3501,
and U3701
End
End
Yes
Yes
No
No
Yes
Yes
No
No
Yes
Yes
No
No
Replace U3801
Replace U3301
No
Yes
Is the failure rectified after the related
circuit is replaced?
Are the
wired specifications
normal?
Is the failure
rectified after the software is updated to
the latest version?
Spot-check the
output RF signals of U3701, U3401, and
U3501 based on the non-signaling transmission of the
frequency band. Are the signals
normal?
Is the RF PA power
supply normal?
Replace the filter
on the corresponding circuit based on the
abnormal frequency band. Is the failure
rectified?

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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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