LG GU280 Service Manual page 121

9. PCB LAYOUT
CN602
Main B to B conn
Abnormal operation
No LCD on
NO Motor,Camera...
U402
OVP
No Charging
CN601
Main Camera socket
CN402
Main Batt connector
No Battery detect
U401
MUIC(MAX14526)
Abnormal operation
No USB,TA,HPH
U601
Camera dual LDO
Abnormal operation
No Camera On
U401
Memory(Numonyx)
Abnormal operation
No power on
System can't work
U201
QSC6240
Abnormal operation
No power on
System can't work
X201
Sleep Crystal(32.768Hz)
Abnormal operation
No power on
Main chip can't work
X101
TCXO(19.2MHz)
Abnormal operation
No power on
System can't work
MIC501
Main MIC
Can't make
TX voice signal
LGE Internal Use Only
8 0 4 1
4 0
F
E
D
C
B
A
6 1
- 122 -
CN501
SPK Pad
Abnormal operation
No SPK Sound
Ant 103,104
BT Ant PAD
Abnormal operation
No BT RF
S401
SD card socket
No SD memory detect
IC500
Audio subsystem
Abnormal operation
No SPK/HPH sound on
X102
BT crystal(32MHz)
Abnormal operation
No BT Chip ON
U103
BT chip(BTS4025)
Abnormal operation
No SPK/HPH sound on
U104
WCDMA PAM(Low)
Can't make a call
Low Tx Power
U102
WCDMA PAM(High)
Can't make a call
Low Tx Power
FL105
FEM
Can't make a call
Low Tx Power
No service
U101
GSM PAM
Can't make a call
Low Tx Power
SW101
ANT switch
ANT101,102
Can't make a call
Main Ant PAD
No service
Can't make a call
No service
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