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Flow Chart of Troubleshooting
9-6
POWER MANAGEMENT IC
Typical 3.7V
R422
VBAT
R416
VBAT
R411
C406
TP402
R421
C414
C416
0
R420
R405
OSC400
FC-135 (0.032768MHz)
2
1
VBAT
C417
+VDD_IO_LOW_1.8V
C405
C402
R425
C412
C413
L402
C410
C411
R418
C421
C426
10uH
L400
R414
TP403
C418
C425
C403
R412
R415
TP400
+VDD_PLL_1.2V
C415
5
8
N
C
5
9
6
SIMIOHC/SIMOFF
7
RSTHC
8
GPO3
9
GPO2
5
0
D
1
V
D
D
5
1
D
1
V
B
A
T
5
2
L
C
V
D
D
D
C
D
V
B
A
T
5
3
S
IM
E
N
5
4
V
B
A
T
5
5
L
C
V
D
D
5
6
VSS
57
N
C
4
3
S
IM
V
C
C
4
4
H
C
V
D
D
4
5
IO
V
D
D
4
6
V
B
A
T
4
7
D
2
V
D
D
4
8
L
P
V
D
D
4
9
D
3
V
D
D
5
SIMRSHC
36
CHGCUR
37
USBVIN
38
VCHG
39
VSS
4
SIMCKHC
4
0
V
S
A
V
E
4
1
R
F
1
V
D
D
4
2
R
F
2
V
D
D
29
MICBIAS
3
IRQ
30
REFC
31
REFGND
32
VISA
33
VBATSENSE
34
REC1
35
REC2
2
1
S
D
A
2
2
S
C
L
2
3
S
IM
C
K
C
D
2
4
S
IM
IO
C
D
2
5
S
IM
R
S
C
D
2
6
S
IM
E
N
27
NTC
28
ONKEY
1
4
C
L
K
3
2
K
1
5
S
C
N
1
6
S
C
P
1
7
C
P
V
D
D
1
8
D
C
D
L
X
1
9
D
C
D
V
B
A
T
2
OSCO
2
0
D
C
D
V
D
D
U402
1
OSCI
10
GPO1
11
PWREN1
12
PWREN2
13
VSS
BAT400
ML-414RM/F9ME
2
NEG
1
POS
R426
C401
R404
C400
TA400
R403
R423
C409
C424
R402
C404
VDD_2.9V_SD
VDD_2.8V_CAM
JACK_IN
SCL
ONKEYN
AUX_ON
+VBUS
V_EXT_CHARGE
SIM_VCC_3.0V
SIMOFFn
+VDD_RX_TX_2.8V
+VCC_SYN_2.8V
32KHz_DIGIT
SDA
REF_ON
IT_PMU
RSTON
+VDD_GSM_CORE_1.2V
MIC_BIAS_2.15V
+AVDD_HFA_2.6V
+VDD_IO_LOW_1.8V
+AVDD_2.6V
+VDD_IO_HIGH_2.9V