LG AR140B, Service Manual

Page: 68 / 166

- 69 - Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
5. TROUBLE SHOOTING
LDO Net name Output Voltage Output Current Usage
SD1 1V35_Core 1.35V 600mA Core & for LDO
SD2 1V8_SD 1.8V 300mA Memory
VAUX 2V9_VAF 2.9V 100mA Cam Auto Focus
VIO 2V62_VIO 2.62V 100mA Peripherals
VSIM 2V9_SIM 2.9V 70mA SIM card
VMME 2V8_VMME 2.9V 150mA u-SD
VUMTS 2V85_AMP 2.85V 110mA Headset AMP
VUSB VUSB 3.1V 40mA Not used
VLED VLED 2.9V 10mA Not used
VAUDIOa 2V5_VAUDA 2.5V 200mA Stereo headset, Mono earpiece
VAUDIOb 2V5_VAUDB 2.5V 50mA Analog parts of S-Gold
VRF1 2V85_VRF 2.85V 150mA
2.85 V supply for SMARTi-PM
RF transceiver
VRF2 1V5_VRF 1,53V 100mA
1.5 V supply for SMARTi-PM
RF transceiver
VRF3 2V65_VBT 2.7V 150mA Bluetooth
VPLL 1V35_VPLL 1.35V 30mA S-GOLD3 PLL
VRTC 2V11_RTC 2.11V 4mA Real Time Clock
VAFC VAFC 2.65V 5mA Not used
VVIB 2V8_VLCD 2.8V 140mA LCD
C201
2.2U
U_VMIN
L200
10UH
1V5_VRF 2V5_VAUDB
VBAT
D200
KDS160E
0
0
2
RI
N
D
C202
10U
3
0
2
Cn
0
0
1
C204
100n
5
0
2
Cn
0
0
1
C208
0.1uF
U
0
1
9
0
2
C
2V62_VIO
10uF
C212
2.2uF
C214
5
1
2
CU
0
1
1V8_SD 1V35_CORE
VBAT
1UF
C217
C218
2.2uF
VBAT
C219
100n
U
2.
2
2
2
2
C
2V9_VMME
PMB6821
U201
4
H
8
H
9
D
6
J
7
H
6
H
5
H
9
G
8
G
7
G
6
G
5
G
4
G
3
G
9
F
8
F
7
F
6
F
5
F
4
F
3
F
9
E
8
E
7
E
6
E
5
E
4
E
8
D
7
D
6
D
5
D
4
D
6
C
L2
L10 K2
J10 K1
K11
J3
J11 H3
H9 J2
J1
H10
H1
H11 H2
G10 G1
G2
G11
F11 F1
F10 F2
E11 E1
E10 E2
D1
D11 E3
D10
D2
C10 C1
C11 D3
C2
B1
1
1
L
8
A
9
J
0
1
K
9
L
9
K
8
L
8
K
7
L
8
J
7
K
6
L
7
J
6
K
5
K
5
J
5
L
4
L
4
K
3
L
3
K
4
J
1
A
4
B
1
1
B
1
L
1
1
A
9
B
0
1
A
0
1
B
9
C
9
A
8
C
8
B
6
A
7
C
7
A
5
A
7
B
5
C
6
B
5
B
4
A
4
C
3
A
3
B
3
C
2
A
2
B
M
V
_
0
E
S
P
V
_
T
A
D
-
C
A
+
C
A
D
N
E
P
S
U
S
N
_
E
O
B
S
U
V
B
S
U
_
D
D
V
P
NI
_
O
N
O
M
N
NI
_
O
N
O
M
O
N
O
M
_
D
D
V
M
_
X
E
F
E
R
V
P
T
U
O
_
O
N
O
M
O
N
O
M
_
S
S
V
N
T
U
O
_
O
N
O
M
F
E
R
R
F
E
R
V
K
NI
H
S
_
H
S
A
L
F
N
O
_
H
S
A
L
F
A
P
N
O
X
T
L
L
P
V
OI
L
L
P
D
D
V
OI
V
2
D
S
V
3
S
M
U
P
2
S
M
U
P
1
S
M
U
P
T
R
O
P
T
U
O
N
O
_
R
E
W
O
P
G
O
D
W
1
F
F
O
_
N
O
2
F
F
O
_
N
O
T
U
O
_
F
F
O
_
N
O
L
T
R
C
_
E
C
R
U
O
S
E
R
T
NI
_
C
2I
T
A
D
_
C
2I
K
L
C
_
C
2I
M
W
P
_
1
L
B
M
W
P
_
2
L
B
M
W
P
_
3
L
B
L
R
T
N
C
_
H
C
E
C
R
U
O
S
_
H
C
C
U
_
E
G
R
A
H
C
E
G
R
A
H
C
_
D
D
V
1
NI
_
E
S
N
E
S
2
NI
_
E
S
N
E
S
F
E
R
_
D
D
V
D
E
L
V
1
D
S
V
RCV
VPIN
VMIN VMME
D+ VDDMME
D-
VDDRF2
RESET_N VRF2
RESET2_N
SLEEP1_N VRF3
SLEEP2_N VDDRF13_AFC
VAUDIOA VRF1
VDDAUDIOA VVIB
VDDSIMVIB
VDDAUDIOB
VAUDIOB VSIM
VAUX VAFC
VDDAUX
VRTC
SU1_GATE
SU1_GND VDDUMTS
SU1_FB VUMTS
SU1_ISENSE
VDDSD1
VDDSD2 SD1_FB
SD2_FB SD1_FBL
SD2_FBL
1
S
S
V
2
S
S
V
3
S
S
V
4
S
S
V
5
S
S
V
6
S
S
V
7
S
S
V
8
S
S
V
9
S
S
V
0
1
S
S
V
1
1
S
S
V
2
1
S
S
V
3
1
S
S
V
4
1
S
S
V
5
1
S
S
V
6
1
S
S
V
7
1
S
S
V
8
1
S
S
V
9
1
S
S
V
0
2
S
S
V
1
2
S
S
V
2
2
S
S
V
3
2
S
S
V
4
2
S
S
V
5
2
S
S
V
6
2
S
S
V
7
2
S
S
V
8
2
S
S
V
9
2
S
S
V
0
3
S
S
V
F
E
R
V
_
S
S
V
1
D
S
_
S
S
V
2
D
S
_
S
S
V
2.2U
C223 C224
22uF
VBAT
100K
R209
TP3
2V11_RTC
0
1
2
RK
7.
4
2V5_VAUDA 2V85_CAM
VBAT
2.2U
C228 C229
1U
U_PMIN
VBAT
T
NI
_
P
S
I
N
D
2
1
2
R
C232
2.2uF
3
3
2
CU
2.
2
K
7.
4
3
1
2
R
0R
R214
K
0
0
1
5
1
2
R
K
7.
4
6
1
2
R
L201
10UH
U_RCV
2V65_VBT
VUSB
1
0
2
D
E
0
6
1
S
D
K
U
1
6
3
2
C
7
3
2
CU
1
VBAT
VBAT
2V62_VIO
C241
2.2uF
2V9_SIM
2.2U
C242
0
0
2
P
T
3
4
2
CU
2.
2
1U
C244
U
0
1
0
5
2
C
C251
2.2U
1V35_VPLL
2V9_VFM
C252
1u
K
7.
4
2
2
2
R
1U
C254
2V85_VRF
1V8_SD
R223
27K
2V8_CAM_A
U
2.
2
6
5
2
C
2.2U
C257
VBAT
2.2U
C253
2.2u
C227
0
0
2
B
F
FB201
USB_DP
USB_DM
USB_SE0_VM
N
E
_
Y
E
K
G
O
D
W
USB_OEN
VCXO_EN
TXON_PA
A
D
S
L
C
S
RTC_OUT
USB_DAT_VP
L
R
T
C
_
E
C
R
U
O
S
E
R
RPWRON_EN
N
O
R
W
P
T
H
GI
L
K
C
A
B
_
Y
E
K
PMRSTN
T
NI
_
R
E
W
O
P
S
BT_VCXO_EN
2
F
F
O
_
N
O
ON_OFF2
)
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