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Flow Chart of Troubleshooting
10-3
VCCB_2.9V
TH300
C316
C324
VCCB_2.9V
3
2
1
D301
C313
VRF_2.9V
VRTC_1.5V
1
C309
BAT300
2
C314
C321
C311
C315
C320
C338
VLDO_7
A10
VREF
H11
VRTC
K12
VSIM
VL4S_A A12
B11
VL4S_B
D10
VL5S_A
VL5S_B C9
G11
VLDO_1
J12
VLDO_2
A13
VLDO_3
B12
VLDO_4
B10
VLDO_5
A14
VLDO_6
C12
01
C
5
D
D
V
31
B
76
D
D
V
E14
VEXT
F15
VIB_DRV
9
L
N
E_
G
N
R_
BI
V
N9
UP_CLK
UP_IO P10
R10
UP_RST
F14
VACC
E13
VBAT
J13
VDD12
C11
VDD34
L8
SCLK_PSC
SDI_PSC M7
N7
SDO_PSC
K14
SIM_CLK
J11
SIM_IO
K11
SIM_RST
RING_DRV F13
H10
RTC_ALMN
LED2_DRV
01
L
Q
R
T
NI
G13
LED1_DRV
G12
F12
CH_ISEN
D14
CH_RES
CREF E9
CSN_PSC K8
CH_BDRV E11
E10
ADC_AUX1
D15
ADC_AUX2
C312
VCCD_1.8V_PSC
VLDO1_1.5V
VBAT
C326 R308
R307
C325
VBAT
VCCA_2.9V
R300
VCCD_2.9V
R306
VIB_DRV
ICHRG
GSM_TX_EN
DCS_TX_EN
SIM_RST
SIM_IO
VSIM
SIM_CLK
UP_SDO
UP_SCLK
UP_CS
RTCALARM
UP_SDI
SIMCLK
SIMDATA
SIMRST
L303
HP_CORE_1.6V
L302
D302
C345
VCCD_1.8V
C389
VBAT
10
3 VIN
2 VOUT
C343
11
5 GND
OUT2 9
8
RUN1
RUN2 6
4 SW1
7
SW2
VFB1
1
VFB2
U305
GND
C388
R315
C344
VLDO1_1.5V