Huawei U9500 Maintenance Manual page 14

U9500 Maintenance Guide
Figure 4-2 Components on the PCBA bottom side
U1201 Codec chip
Failure symptom: audio
failure
MIC1402 Secondary
microphone
Failure symptom: no
loopback on the secondary
microphone
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
Issue 1.2 (2012-6-30)
U3203/U3204/U3205 Load switch
Failure symptom: camera failure
U3206 Load switch
Failure symptom:
camera failure
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4 Layout of Components on the PCBA
J3503/J3504 Bluetooth/WL
antenna spring
Failure symptom: no signals
U4802 Transceiver power supply
chip
Failure symptom: network
registration failure
J1800 Rear camera BTB
connector
Failure symptom: camera
failure
J2202 Flashlight BTB
connector
Failure symptom:
flashlight failure and torch
failure
J3602/3603 GPS antenna
spring
Failure symptom: GPS failure
U4702 RF duplexer
Failure symptom: network
connection failure
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
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
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