U9500 Maintenance Guide
4 Layout of Components on the PCBA
Issue 1.2 (2012-6-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
9
Figure 4-2
Components on the PCBA bottom side
U4704 RF PA
Failure symptom:
network connection failure
U4801 RF PA power supply chip
Failure symptom:
network
connection failure
J4710 RF coaxial connector
Failure symptom:
network
connection failure
U4702 RF duplexer
Failure symptom:
network
connection failure
J3602/3603 GPS antenna
spring
Failure symptom:
GPS failure
J2202 Flashlight BTB
connector
Failure symptom:
flashlight failure and torch
failure
J1800 Rear camera BTB
connector
Failure symptom:
camera
failure
J3503/J3504 Bluetooth/WL
antenna spring
Failure symptom:
no signals
U3203/U3204/U3205 Load switch
Failure symptom:
camera failure
MIC1402 Secondary
microphone
Failure symptom:
no
loopback on the secondary
microphone
U4703 RF switch
Failure symptom:
network
connection failure
U4701 Dual-mode RF
transceiver chip
Failure symptom:
network
access failure
U4708 RF clock
（
26 MHz
）
Failure symptom:
network access
failure
U3206 Load switch
Failure symptom:
camera failure
U1201 Codec chip
Failure symptom:
audio
failure
U401 Dual input and
gate
Failure symptom:
power-
on failure
U1301 Energy meter chip
Failure symptom:
power-
on failure and power
measurement failure
J2203 Main FPC BTB
connector
Failure symptom:
side key
failure, vibrator failure, main
microphone failure, and
speaker failure
J1601 LCD BTB
connector
Failure symptom:
LCD
failure
J1301 Battery connector
Failure symptom:
power-
on failure
U902 AP energy meter
Failure symptom:
power-on
failure or high temperature
U3201 2.85 V DCDC
Failure symptom:
camera
failure
U4802 Transceiver power supply
chip
Failure symptom:
network
registration failure
