Huawei P20 Maintenance Manual

EML-L29V100R001 Advanced Maintenance Manual V2.1
INTERNAL
2019-6-25
Huawei Confidential
Page 49 of 67
4.15 GPS Failure
4.15.1 Maintenance Process
GPS failure
Perform cross
verification. Is the PCBA
faulty?
Is the
GPS antenna
missing?
Is the GPS
antenna properly
assembled?
Replace
the rear
cover
Is the
appearance of GPS chip,
crystal oscillator clock, and components
on the GPS antenna circuit
normal?
Replace components
with abnormal
appearance
Does the
soldering of the chip and crystal
oscillator have problems under an
X-ray machine?
Replace corresponding
components
Does TCXO5601 have output?
Replace TCXO5601
Is CLK32_GPS normal?
If there are no soldering
issues, replace U1000
Is GPS_EN normal?
If there are no soldering
issues, replace U300
Is the power supply of
LB5601 normal?
If there are no soldering
issues, replace U5602
Is the power
of each node on the circuit
normal?
Check the circuit for
faulty components
Is the GPS
antenna spring in good
contact with the
antenna?
Re-assemble
the antenna
If the
assembly is
normal,
replace the
rear cover
Replace the rear cover
Yes
No
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
Yes
Yes
No
Replace the PCBA

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