Huawei U8350 Maintenance Manual page 12

U1501 DCDC Control
Chip
Failure symptom:
Charging failure.
J1302 BTB
Connector-Female-
24Pin
Failure symptom:
Touch Panel failure;
volume key failure;
Power key failure.
J1601 Connector, SIM
Card Socket
Failure symptom:
Can't identify SIM card.
J1001 BTB
Connector-Female-
24Pin
Failure symptom:
Camera failure.
U1402 Semiconductor
Sensor,
Accelerometer
Failure symptom:
Gravity sensor failure.
J1303 BTB
Connector,Female,
10Pin
Failure symptom:
Keypad failure; voice
transmitting failure..
J1602 Card
Connecter, MicroSD
Receptacle
Failure symptom:
Can't identify microSD
card.
J1501 Battery Socket
Failure symptom:
Can't power on.
2011-05-18
U8350 Maintenance Manual Basic Version V1.0
U4601 Single chip WiFi,
802.11a/b/g/n-BCM4319
Failure symptom:
WiFi failure.
Huawei confidential. No spreading without permission.
U3201 RF Connector
Failure symptom:
No signal, weak signal.
U1403 Semiconductor
Sensor, E-Compass
Failure symptom:
Compass failure.
Internal
J1201 BTB
Connector,
Female,50Pin
Failure symptom:
LCD display failure.
U1201 Voltage
Regulator, Current
Mode
Failure symptom:
LCD backlight failure.
U4705 Ceramics
Filter, 2450MHz
Failure symptom:
WiFi failure. BT failure.
U4704 RF Switch,
10-3000MHz
Failure symptom:
WiFi failure. BT failure.
X4001 Crystal-32MHz
Failure symptom:
BT failure.
X4601 Crystal-26MHz
Failure symptom:
WiFi failure.
U4001 Bluetooth IC
chip BTS402
Failure symptom:
BT failure.
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