Huawei P20 Maintenance Manual

EML-L29V100R001 Advanced Maintenance Manual V2.1
INTERNAL
2019-6-25
Huawei Confidential
Page 15 of 67
No.
Designator
Description
Symptom
Remarks
DP display, or port detection fails, or
other failures related to sub-board
functions occur.
adhered substance
first.
33
J2902
Proximity
sensor/Ambient
light sensor
The proximity sensor/ambient light
sensor malfunctions.
34
J2903
RGB tri-color
LED connector
The LED malfunctions.
35
J2904
Side button FPC
connector
The power button and volume buttons
do not work.
3 Software Maintenance Guide
3.1 Root Detection Instructions
3.1.1 Forcibly Entering Fastboot Mode
1. Connect the phone to a computer using a USB cable. Power on the phone, press and hold the power
and volume down buttons for 10s, and wait for the phone to power off.
Expected symptom: The black screen is displayed.
2. Keep pressing and holding the power and volume down buttons, and then release the buttons when the
phone enters the fastboot screen.
Expected symptom: The fastboot page is displayed. The fastboot port is displayed in the Device Manager
on the computer.
3.1.2 Entering Forcible Loading Mode (Forcible Update Mode)
1. When the phone is powered on, press and hold the power button for 10s until the phone is powered
off.
Expected symptom: The black screen is displayed.
2. Once the phone is powered off, press the power, volume up, and volume down buttons. Connect the
phone to a computer using a USB cable.
Expected symptom: The USB update screen is displayed. The ADB port and PCUI port are displayed in the
Device Manager on the computer.
3.1.3 Detection in Fastboot Mode
1. Follow the instructions in section 3.1.1 "Forcibly Entering Fastboot Mode" to enable the phone to
enter the fastboot mode. Then, connect the phone to a computer using a USB cable.
2. Run the NFF detection tool compartner.exe. The automatic detection starts. If the detection result is
locked, the phone has not been rooted. If the detection result is unlocked, the phone has been rooted.

Huawei P20 Specifications

General

Panel type	TFT
Screen shape	Flat
Pixel density	428 ppi
Second display	No
Display diagonal	5.8 \
Touch technology	Multi-touch
Touchscreen type	Capacitive
Display resolution	2244 x 1080 pixels
Native aspect ratio	19:9
Rounded display corners	Yes
Display number of colors	16 million colors
Processor cores	4
Processor family	Hi-Silicon
Processor frequency	2.36 GHz
Coprocessor frequency	1.8 GHz
Processor architecture	ARM Cortex-A73
Coprocessor architecture	ARM Cortex-A53
RAM capacity	4 GB
Compatible memory cards	Not supported
Internal storage capacity	128 GB
Flash type	LED
Rear camera type	Dual camera
Front camera type	Single camera
Video recording modes	1080p, 2160p
Rear camera aperture number	1.8
Front camera aperture number	2
Rear camera resolution (numeric)	12 MP
Front camera resolution (numeric)	24 MP
Second rear camera aperture number	1.6
Second rear camera resolution (numeric)	20 MP
4G standard	LTE
2G standards	GSM
3G standards	WCDMA
SIM card type	NanoSIM
Wi-Fi standards	802.11a, Wi-Fi 5 (802.11ac), 802.11b, 802.11g, Wi-Fi 4 (802.11n)
Bluetooth version	4.2
Bluetooth profiles	A2DP, APT-X
SIM card capability	-
Mobile network generation	4G
Subscription type	No subscription
USB version	3.2 Gen 1 (3.1 Gen 1)
USB connector type	USB Type-C
HDMI ports quantity	0
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 factor	Bar
Product color	Blue
Themes	Wallpapers
Graphics card	Mali-G72 MP12
Personalization	Icons, Menu, Shortcuts
Personal info management (PIM)	Alarm clock, Calculator, Calendar, Notes
Speakers	stereo
Audio formats supported	3GP, AAC, APE, FLAC, MIDI, MP3, OGG, WAV
Video formats supported	3G2, 3GP, ASF, H.264, MKV, MP4, WEBM
Platform	Android
Operating system installed	Android 8.1
Talk time (3G)	- h
Battery capacity	3400 mAh
Battery recharge time	1.5 h
Interface adapters included	USB Type-C - 3.5mm

Weight and Dimensions

Depth	7.65 mm
Width	70.8 mm
Height	149.1 mm
Weight	165 g