4. TROUBLE SHOOTING
- 115 -
Copyright © 011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
VREG_HPVDD_1.8V
HS_MIC_BIAS
EUSY0407201
U500
5
3
2
4
1
VOUT
VIN
GND
STBY
D
N
G
P
USB_3.3V
HS_MIC_BIAS_TEMP
1u
C571
C502
1n
+VPWR
4.7u
L504
L503
4.7u
4.7u
L502
K0
51
20
5
R
VREG_MSMP_2.6V
2.2u C535
VREG_MSME_1.8V
R504
47K
VREG_LCD_1.8V
C546
1u
C507
DNI
L501
4.7u
C528
4.7u
DNI
C536
K1
30
5
R
DNI
C508
C516
1u
+VPWR
CM315_12_5PF
X500
32.768KHz
2
1
0.1u
C549
VREG_MSME_1.8V
10u
C519
C540
2.2u
VREG_TOUCH_3.0V
VREG_RF_2.7V
M
_
S
N
S
I
U501
EUSY0342201
PM7540
9
J
8
J
7
J
6
J
5
J
9
H
8
H
7
H
6
H
5
H
9
G
8
G
7
G
6
G
5
G
9
F
8
F
7
F
6
F
5
F
9
E
8
E
7
E
6
E
5
E
H1
E10
F1
F10
E1
C12
N2
B1
M12
B2
K7
A5
N13
A4
M13
B5
B4
G10
A7
D9
A6
H12
B7
B6
C13
A13
D10
A12
K10
H10
G12
J10
G1
M1
K4
D13
J4
E12
H4
N11
M2
A3
L2
A10
H2
A8
H13
K2
G13
J2
A11
G4
K13
F4
E13
D5
B13
B3
A9
M5
N12
N3
J13
N1
A2
M3
K6
M4
K5
N4
K9
M9
K8
N10
M11
M6
L12
N6
A1
M8
D4
N8
B12
J1
D8
K1
N5
M7
2
G
2
1
D
7
D
8
B
0
1
M
6
D
9
B
2
1
J
3
1
F
2
1
F
2
1
K
7
N
9
N
0
1
B
3
1
L
1
1
B
2
F
4
E
2
C
1
C
1
D
1
L
2
D
2
E
G
H
C
V
N_
LT
C_
G
H
C
S
U
B
V_
B
S
U
N_
LT
C_
B
S
U
P_
S
N
SI
M_
S
N
SI
N_
T
EF
_T
A
B
T
A
B
V
NI
O
C
V
P
U
K
C
A
B_
V
A
N
A_
D
D
V
E_
1
C_
D
D
V
A
P_
2
C_
D
D
V
2
P
G_
D
D
V
6
P
G_
D
D
V
2
E
M
S
M_
D
D
V
P
M
S
M_
D
D
V
1F
R_
D
D
V
2F
R_
D
D
V
MI
U
R_
D
D
V
R
K
P
S_
L_
D
D
V
R
K
P
S_
R_
D
D
V
O
X
CT
_
D
D
V
N
AL
W_
D
D
V
MPP_1
MPP_2
VSW_5V
MPP_3
VREG_5V
MPP_4
VSW_MSMC1
MPP_5
VREG_MSMC1
MPP_6
VSW_MSMC2
MPP_7
VREG_MSMC2
MPP_8
VSW_MSME
MPP_9
VREG_MSME
MPP_10
VSW_PA
MPP_11
VREG_PA
MPP_12
MPP_13
VREG_GP1
MPP_14
VREG_GP2
MPP_15
VREG_GP3
MPP_16
VREG_GP4
MPP_17
VREF_GP5
MPP_18
VREG_GP6
MPP_19
VREG_MMC
MPP_20
VREG_MSMA
MPP_21
VREG_MSME2
MPP_22
VREG_MSMP
VREG_RFRX1
USB_ID
VREG_RFRX2
USB_D_P
VREG_RFTX
USB_D_M
VREG_RUIM1
USB_OE_N
VREG_SYNT
USB_DAT
VREG_TCXO
USB_SE0
VREG_USB
VREG_WLAN
SBST
MIC_BIAS
SBCK
SBDT_SSBI
REF_ISET
MSM_INT_N
REG_GND
REF_BYP
SPKR_IN_L_M
SPKR_IN_L_P
TCXO_IN
SPKR_OUT_L_M
TCXO_EN
SPKR_OUT_L_P
TCXO_OUT
SPKR_IN_R_P
SPKR_IN_R_M
XTAL_IN
SPKR_OUT_R_P
XTAL_OUT
SPKR_OUT_R_M
SLEEP_CLK
VIDEO_IN
AMUX_OUT
VIDEO_OUT
VIB_DRV_N
KPD_PWR_N
KPD_DRV_N
PON_RESET_N
LCD_DRV_N
PS_HOLD
FLSH_DRV_N
1
D
N
G
2
D
N
G
3
D
N
G
4
D
N
G
5
D
N
G
6
D
N
G
7
D
N
G
8
D
N
G
9
D
N
G
01
D
N
G
11
D
N
G
21
D
N
G
31
D
N
G
41
D
N
G
51
D
N
G
61
D
N
G
71
D
N
G
81
D
N
G
91
D
N
G
02
D
N
G
12
D
N
G
22
D
N
G
32
D
N
G
42
D
N
G
52
D
N
G
121K
R509
D501
0.1u
C514
1n
C517
22p
C515
VREG_TCXO_2.85V
C513
0.1u
C512
0.1u
10
5
R
10K
0.1u
C534
51
R510
1n
C524
2.2u
C537
C568
33p
2.2u
C539
C521
1n
C544
2.2u
VBATT
VREG_MSMC1_1.25V
VCHG_VBUS
R515
200K
1n
C523
VREG_MSMP_2.6V
1n
C518
0.1u
C511
VREG_RUIM_3.0V
2.2u
C509
C526
4.7u
C547
2.2u
C538
2.2u
0.1u
C510
VREG_MSMA_2.6V
4.7u
C527
1u
C548
VREG_MSMC2_1.25V
VREG_SMPS_2.1V
C522
1n
1u
C545
10u
C520
VREG_MSMP_2.6V
4.7u
C542
0.1u
C506
R500
4.7
22u
C525
C543
2.2u
VREG_MMC_3.0V
TP502
0.1u
C505
4.7u
C541
0.1u
C504
C503
0.1u
C500
22p
C501
0.1u
VREG_AUX2_2.9V
VREG_MOTION_3.0V
VREG_LCD_2.8V
C570
33p
C566
1u
TP501
03
5
R
K0
03
R505
1K
D500
+VPWR
L500
2.2u
+VPWR_AUDIO
10u
C530
1n
C529
USIM_CLK
USIM_DATA
KEY_LED_DRV_N
SLEEP_CLK
REMOTE_PWR_ON
TCXO_PM_19.2MHZ
PS_HOLD
PM_INT_N
GSM_PA_DAC_REF
AMUX_OUT
PMIC_TCXO
TCXO_EN
PMIC_SSBI
PM_ON_SW
JTAG_PS_HOLD
P
U_
K
C
A
B
V
USB_LDO_EN
USB_LDO_EN
PCB_REVISION
PCB_REVISION
N_
LT
C_
G
H
C
N_
T
EF
_T
T
A
B
P_
S
N
SI
VBAT_TEMP
VSNS_MSME_1.8V
VSNS_MSMC2_1.25V
nPON_RST
VSNS_MSMC1_1.25V
VBAT_SENSE
USIM_RST
MSM_USIM_CLK
MSM_USIM_RST
MSM_USIM_DATA
R
W
P
V+
1.30V
close to MSM
USB 3.3V LDO
150K
150K
150K
ADC
150K
TEST&E
150K
0.5mm
R2
2.13V
10K
68K
47K
150K
150K
Place crystal and load caps close to PM7540
REV
1.93V
C&H
B&G
1%
Local Ground Plan
PM7540
Place in PM7540 room at shield edge
A&F
Rev.1.1
150K
150K
PCB Revision Check ADC
Route together
0.16V
Rev.1.0
D&I
0.6mm
Rev.1.2
680K
0.81V
0.6mm
These CAPs close to inductors
100K
1.73V
0.62V
300K
R1
0.6mm
1.04V
430K
Route together
Place close to PM7540 pins
PMIC
1608
close to each other
m
m
5
.
0
9
N
,
7
N
0.3mm 0.3mm
C531
100u
C532
10n
VCHG_VBUS
VBATT
Q500 NUS5530MN
EQFP0008601
5
6
4
7
3
8
2
9
1
10
DRAIN_B
NC1
COLLECTOR_B
COLLECTOR
EMITTER
SOURCE
BASE
DRAIN
NC2
GATE
1.
0
60
5
R
CHG_CTL_N
BATT_FET_N
ISNS_P
+VPWR
2mm
1608
Charging IC
10V
2mm
1%
ISNS_M
MAX14528
U503
EUSY0374601
9
6
5
3
4
8
2
7
1
IN1
OUT1
IN2
OUT2
IC1
OVLO
IC2
D
N
G
D
N
G
P
22p
C561
C562
1u
SC500
1
CN501
11
10
9
5
4
3
2
1
8
7
6
ZD502
VCHG_VBUS
22p
C564
FL500
IN
OUT
GND1 GND2
USB_ID
USB_DM
USB_DP
OVP
change circuit at REV B
MicroUSB
2mm
TP1
TP2
TP3
TP4