Huawei U8500 Maintenance Manual page 13

U1201 DCDC Control
Chip
Failure Symptom:
LED backlight failure
X4601 Crystal 26MHz
Failure Symptom:
WiFi transmission failure
J1602 MICRO SD
Receptacle
Failure Symptom:
Can't identify SD card
J1601 SIM Socket
Failure Symptom:
Can not identify SIM card
2010-12-21
U8500 Maintenance Manual Basic Version V1.1
Huawei confidential. No spreading without permission.
Internal
U4601 chip WiFi
Failure Symptom:
WiFi transmission failure
X4001 Crystal 32MHz
Failure Symptom:
Bluetooth function failure
U4001 Bluetooth IC chip
Failure Symptom:
Bluetooth function failure
U4604 RF Switch
Failure Symptom:
WIFI/BT function failure
U4605 Ceramics Filter
Failure Symptom:
WIFI/BT function failure
Page 13 of 62