Faulty Component Description - Huawei P20 Maintenance Manual

2.4 Faulty Component Description

The following table describes component faults.
C o m p o nent
M ai ntenance G ui d e i n EM L-L29V 100R 001 A d vanced M ai ntenance M anual _V 2. 0-20180227-原稿. xl sx
No. Designator
1 U300
2 U300_POP
2019-6-25
EML-L29V100R001 Advanced Maintenance Manual V2.1
Description
SOC
DDR
Huawei Confidential
Symptom
U300 is the system's main control chip.
If it fails, the symptoms may vary. For
example, the phone cannot be powered
on, the system freezes, the phone
restarts repeatedly, or the phone has
various malfunctions. Replace U300
only if you are sure SOC is faulty.
Various stability faults may occur. For
example, the phone cannot be powered
on, restarts repeatedly, or freezes.
INTERNAL
Remarks
Replace SOC only
when other
methods do not
work.
DDR and SOC are
bound together.
Only if you are
sure that DDR is
defective, replace
DDR.
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