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.
8
Figure 4-1
Components on the PCBA top side
VCXO900 Crystal oscillator
（
26
MHz
）
Failure symptom:
power-on
failure
D1600 LCD backlight diode
Failure symptom:
LCD backlight
failure
U2801 Audience
Failure symptom:
Noise heard
by the remote end
U1600 LCD backlight power supply
chip
Failure symptom:
LCD backlight
failure
U1601 LCD power supply chip
Failure symptom:
LCD failure
X900 Crystal oscillator
（
32 kHz
）
Failure symptom:
power-on failure
U901 PM chip
Failure symptom:
power-on
failure or excessive current
U2005 Compass chip
Failure symptom:
compass
failure
U1800 Flashlight driv er
Failure symptom:
camera failure and torch
failure
J2201 HD1FRONT BTB connector
Failure symptom:
Receiver failure, power-on button failure, touch
panel failure, three-color light failure, and light
sensor failure
U2003
Gyroscope chip
Failure symptom:
gyroscope failure
U3207/U3208 loadswitch
Failure symptom:
camera
failure
U301/U301_POP Main chip/DDR
Failure symptom:
power-on failure
U3801 Modem
Failure symptom:
network registration
failure, network access failure, and call
set-up failure
TCX03601 GPS clock
Failure symptom:
GPS failure
U501 Clock buffering chip
Failure symptom:
power-on failure, codec
failure, or BT /WL/FM failure
U1102 8G EMMC
Failure symptom:
power-on failure,
data storage or read failure
U3103 Lev el shifter chip
Failure symptom:
MHL failure
U3106 Inv erter
Failure symptom:
MHL
failure
U3104 3.3 V LDO
Failure symptom:
MHL failure
J1500 Headset j ack
Failure symptom:
headset failure, FM failure
J3604 GPS antenna grounding
spring
Failure symptom:
GPS failure
U3601 GPS chip
Failure symptom:
GPS failure
Z3599 Filter
Failure symptom:
no signals on
BT /WL
U3501 RF switch
Failure symptom:
network
registration failure and network
access failure
U3401 FM/BT/WL three-in-one chip
Failure symptom:
FM/BT /WL failure
U1901 Charging chip
Failure symptom:
charging
failure
U3102 USB switch
Failure symptom:
USB connection
failure
U3101 MHL chip
Failure symptom:
MHLfailure
U1900 USB switch
Failure symptom:
MHL failure and
USB connection failure
U3105 DC-DC
Failure symptom:
camera failure
U2004
Acceleration sensor chip
Failure symptom:
accelerometer failure
U2401 Tri-color light control chip
Failure symptom:
light failure
J1801 Secondary camera
BT B connector
Failure symptom:
camera
failure
