4. TROUBLE SHOOTING
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Only for training and service purposes
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ͽͶ͑ͺΟΥΖΣΟΒΝ͑ΆΤΖ͑ΟΝΪ
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4. TROUBLE SHOOTING
Figure 4.2 power block of T310i
CIRCUIT
.
.
. . .
.
. . .
.
C106
2.2u
1V8_VDD
1V8_VDD
VUSB
1V8_VDD
VBAT
75
FB101
VCORE
1V8_VDD
VDDMS
1V8_VDD
VUSB
VDDTRX
1V8_VDD
1V8_VDD
VDDTDC
C111
0.1u
22u
C112
1V8_VDD
1V8_VDD
VDDRF2
VDDTDC
VMMC
470
R114
VCORE
Q101
1
2
3
VMMC
0
R115
1V8_VDD
C116
0.1u
VAUX
VAUX
0.1u
C118
1u
C119
VRF1
VDDMS
100K
R116
3.3u
L101
VBAT
VDDXO
C120
2.2u
470n
C122
VBAT_RF2
470n
C123
1V8_VDD VPMU
VBAT
47n
C125
C126
470n
47n
C127
C128
4.7n
VPMU
VBAT
VBAT
VDDRF2
0.1u
C129
N12
6
K
5T
6
R
7
M
4T
6
M
6L
01
L
51
C
51
F
01
H
31
G
9
M
7L
21
F
8
P
21
E
41
G
61
R
21
A
21
B
11
E
31
H
21
G
31
A
01
J
31
F
41
F
51
P
41
P
8
G
8
K
9J
9
H
8F
9T
01
P
5
R
7
K
9
G
8
N
61
P
41
L
7
R
7T
6T
7
P
1
D
S_
D
D
V
BF
_1
D
S
1
D
S_
S
S
V
W
S_
1
D
S
S
M
S
S
V
P
ST
A
B
V
U
M
P_
T
A
B
V
1
OI
D
D
V
2
OI
D
D
V
U
B
E_
D
D
V
U
M
P
V
U
M
P_
S
S
V
1
E
R
O
C_
S
S
V
2
E
R
O
C_
S
S
V
3
E
R
O
C_
S
S
V
E
R
O
C
V
E
R
O
C
D
D
V
P
C8
V1
D
D
V
R
SL
S
S
V
X
RT
S
S
V
X
R
S
S
V
18
V1
D
D
V
P
M
A
R
V
GI
D_
S
S
V
S
M
D
D
V
O
X
D
D
V
C
DT
D
D
V
D
M
M
D
D
V
G
E
N
D
D
V
T
A
B
V
O
C
D
S
S
V
X
U
A
V
O
X
S
S
V
C
M
M
V
B
S
U
V
2F
R
D
D
V
1F
R
V
OL
_
S
S
V
F
R
S
S
V
CT
R
V
N
E
S
N
E
S
P
E
S
N
E
S
G
H
C
D
D
V
S
C
B
S
C
G
H
C
V
T
N
H
S
V
M0
VBAT
C130
1u
C133
0.1u
VDDXO
C134
0.1u
220n
C135
VBAT_RF2
VRTC
R118
3.9K
220n
C136
5.6K
R119
18p
C137
C139
10u
VRF1
R112
100K
R111
56K
LCD_ID
TX_RAMP
LDO_OUT
(10V)
PIN_H10
Seperate and shield
Speaker Supply
(10V)
VDD_IO2
VBATSP
(1%)
VDD1V8CP
VDD_IO1
PIN_H13
PIN_B14
RF SUPPLIES (DIRTY GND)
PMU SUPPLIES
PIN K8
PIN M9
PIN L7
PIN P8
RF SUPPLIES (CLEAN GND)
(10V)
VBAT_PMU
PIN P14
PIN P16
PIN P10
PIN R5
PIN G9
PIN_B12
PIN_E11
PIN_G14
PIN_G13
ABB SUPPLIES
DBB SUPPLIES
PIN K7
PIN N8
VDD_EBU
Figure 4.2 Power block of LG-T315i