Huawei U9500 Maintenance Manual page 13

U9500 Maintenance Guide
Figure 4-1 Components on the PCBA top side
J2201 HD1FRONT BTB connector
Failure symptom:
Receiver failure, power-on button failure, touch
panel failure, three-color light failure, and light
sensor failure
J1500 Headset j ack
Failure symptom: headset failure, FM failure
TCX03601 GPS clock
Failure symptom: GPS 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
Issue 1.2 (2012-6-30)
U3207/U3208 loadswitch
Failure symptom: camera
failure
U301/U301_POP Main chip/DDR
Failure symptom: power-on failure
U3104 3.3 V LDO
Failure symptom: MHL failure
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4 Layout of Components on the PCBA
U2003
J1801 Secondary camera
Failure symptom:
BT B connector
Failure symptom: camera
failure
U1800 Flashlight driv er
Failure symptom: camera failure and torch
failure
U2004
Failure symptom:
U2401 Tri-color light control chip
Failure symptom: light failure
U3106 Inv erter
Failure symptom: MHL
failure
Gyroscope chip
gyroscope failure
Acceleration sensor chip
accelerometer failure
U2005 Compass chip
Failure symptom: compass
failure
U901 PM chip
Failure symptom: power-on
failure or excessive current
X900 Crystal oscillator（ 32 kHz ）
Failure symptom: power-on failure
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
U3801 Modem
Failure symptom: network registration
failure, network access failure, and call
set-up 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
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