4. TROUBLE SHOOTING
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Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
TP4
TP3
U100
U100
FB101
600
C105
2.2u
C106
2.2u
C170
1u
T1
5
R19
R18
R17
R16
R15
V2
3
AA1
5
AC15
W2
2
W1
7
Y1
7
AA1
7
AB1
7
AA1
2
AC14
W1
2
V1
2
AC12
AA1
4
Y1
4
W1
3
V1
3
T1
4
U13
AA1
1
AA1
0
W1
1
K2
1
K2
2
M2
0
R21
P1
8
B1
4
G1
1
VDD28_FSR
C
XOSC32_ENB
AVSS28_ABB
AVDD28_ABB
AVDD18_AUD
AVSS12N_AU
D
AVSS18_AU
D
AVDD28_F
M
AVSS28_FM_
1
AVSS28_FM_
2
GND_BT_
1
GND_BT_
2
GND_BT_
3
GND_BT_
4
GND_BT_
5
GND_BT_
6
AVDD33_PA_BT
A
VDD33_DC2DC_IN_B
T
AVDD13_OUT_B
T
AVDD13_SXAFE_B
T
AVDD13_TRX_B
T
TEST
4
TEST
3
TEST
2
TEST
1
AVDD28_HF
AVDD28_LF
DVDD28_I
O
GND_RF_24
GND_RF_1 GND_RF_2 GND_RF_3 GND_RF_4 GND_RF_5
0.1u
C101
10
p
C102
C103
0.1u
0.1u
C111
VIO_2V
8
AVDD_2V
8
1n
C110
VIO_1V
8
VBT_3V
1
VBT_3V
1
1u
C104
VFM_2V
8
VRF_2V
8
VTCXO_2V
8
C112
0.1u
VIO_2V
8
C114
1u
GND
changed (12/3)
Close to IC
(Priority 2)
Close to IC
(Priority 2)
Close to IC
(Priority 1)
Close to IC
(6/26)
GND_BT should connect together and then connect to main GND
Close to IC
W12,AC14,AA12: Star Connection
(X5R)
(X5R)
V23: need through hole to main GND
Close to IC
(X5R)
(X5R)
(X5R)
Internal 32k : B14 -> VRTC
External 32k : B14 -> GND
(B14)
(X5R)
(X5R)
TP4
TP3