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10. Flow Chart of Troubleshooting
10-1
BASEBAND
10-1-1. Power ON
'Power On' does not work
Check the current consumption
Yes
Current consumption
>= 100mA
No
Download again
Yes
Check the Vbat Voltage
Voltage >=3.3V
No
Charge the Battery
Yes
U402 PIN
F10(PS_HOLD)=2.6V
No
Check the PMIC related to
PS_HOLD
Yes
check the PMIC output
voltage (C414, C415,
C417, C418, C419)
No
check the PMIC
Yes
check the TCX200
C201=19.2Mhz?
No
Check the clock generation circuit
(relatedtoTCX200)
Yes
Check the initial operation
END
10-1
Flow Chart of Troubleshooting
VBATT_4.2V
< Power Management IC >
V_RF_2.7V
V_RF_2.1V
V_MSMP_2.6V
C453
10V
V_MSMA_2.6V
WPAM_BIAS_2.85V
V_MSME_1.8V
V_MSMC_1.2V
V_RF_2.1V
V_TCXO_2.85V
V_MMC_2.85V
C405
C406
VBATT_4.2V
0603
C452
1005
C454
V_RF_2.7V
V_BT_2.6V
V_FEM_2.7V
C400
C401
C402
C403
C404
25V
10V
C408
R424
1005
C407
V_USIM_3.0V
C409
C456
10V
A3
A7
MPP1|AMUX_IN1
VREG_GP1
A2
VREG_GP2
B7
B1
MPP2|AMUX_IN2
VREG_GP3
AMUX_OUT
K3
AMUX_OUT
TP_AMUX_OUT
L9
L3
VREG_MMC
G11
MPP3|VIB_DRV_N
VREG_MSMA
L1
K8
< JIG Detect >
MPP4|LCD_DRV_N
VREG_MSME
L2
KPD_DRV_N
VREG_MSMP
J11
K4
VREG_MSMC
K5
VSW_MSMC
D7
SIM_RST
MPP5|RUIM_M_RST
USIM_RST
H7
MPP6|RUIM_RST
L400
D6
MPP9|RUIM_M_CLK
A9
SIM_CLK
VREG_RFRX1
H6
MPP10|RUIM_CLK
A10
USIM_CLK
VREG_RFRX2
TR400
D5
A8
SIM_IO
MPP11|RUIM_M_IO
VREG_RFTX
H5
B8
USIM_IO
MPP12|RUIM_IO
VREG_RFUBM
TP_RFUBM
L10
JIG_ON_SW
VREG_RUIM
K2
MPP7|CBLPWR_N
3
2
JIG_ON_SW
REF_OUT
1
B4
L8
JIG_ON
MPP8|REF_OUT
VREG_S2
VREG_S3
L6
L401
D4
OPT_1
K7
H8
U402
VSW_S2
K6
OPT_2
VSW_S3
L402
C412
C11
REF_BYP
VREG_TCXO
A1
E10
REF_GND
G2
D10
REF_ISET
VREG_WLAN
VREG_USB
B11
1005
R400
VBATT_4.2V
C413
B5
SPKR_IN_M
B6
SPKR_IN_P
D1
ISNS_M
D2
ISNS_P
A5
SPKR_OUT_M
A6
L11
SPKR_OUT_P
XTAL_IN
K11
C419
C422
C425
C429
C430
C416
XTAL_OUT
C417
C418
C420
C421
C414
C423
C424
C426
C427
C415
C428
D8
TCXO_EN_1
TCXO_EN
E4
F8
R401
R402
BT_TCXO_EN
BT_TCXO_OUT
TCXO_EN_2
SBCK
C431
E11
G8
CLK19.2M_TCXO
TCXO_IN
SBDT|SSBI
0603
PMIC_SBST
SSBI2_DATA
C432
H10
TCXO_OUT_1
E8
CLK19.2M_PM
SBST
B10
TCXO_OUT_2
0603
OSC400
F11
J10
TCXO_FF
TCXO_OUT_RF
VCOIN
VEXT_5V
E2
0603
R403
BAT_FET_N
G4
USB_DAT
C2
USB_DAT
J1
CHG_CTL_N
C1
USB_DM_MODEM
USB_DP_MODEM
USB_D_M
VCHG
J2
K1
USB_D_P
HSET_BIAS
L4
H2
USB_ID
H4
KPD_PWR_N
ON_SW
F4
USB_OE_N
C10
TP_PM_INT
T
P_PS_HOLD
C433
R406
USB_OE_N
USB_SEO
MSM_INT_N
F2
G10
PM_INT_N
SLEEP_CLK
2
USB_OVP_G
PON_RESET_N
RESET_N
PS_HOLD
BOOT_SW
3
USB_DM_JTAG
F10
USB_SE0
PS_HOLD
USB_DP_JTAG
USB_VBUS_5V
H1
USB_VBUS
SLEEP_CLK
K9
1
C457
TP_SLEEP_CLK
D400
1005
R408
R411
R407
0603
1005
1
POS
C437
C438
BAT400
NEG
2
C345
C305
R504
C341
C330
C319
C324
C429
R424
C318
TP_RFUBM
C408
C452
C407
C400
C412
C431
C354
C417
TP_RESETOUT_N
C300
C401
R408
C457
C418
C454
C453
C456
10-2
Flow Chart of Troubleshooting
10-1-2. Sim Part
"Insert SIM" is displayed on the LCD
Yes
Check the SIM connector's
(SIM400) connection to
SIM card
No
Resolder or change
SIM400
Yes
Check the voltage at
pin#1(C442) of SIM400 >=
3.0V ?
No
Check the PMIC
Yes
No
Is there any signals
pin#2,#3,#4 of SIM400 ?
Check the
PMIC
Yes
Check the SIM Card
END
10-3
Flow Chart of Troubleshooting
< USIM Connector >
V_USIM_3.0V
SIM400
R413
1005
11
2
6
6
USIM_RST
2
33
5
5
44
USIM_CLK
G
G
9
G
G
7
10
8
USIM_IO
C439
C441
C442
C443
ZD401
R413
C439
SIM400
10-4
Flow Chart of Troubleshooting
10-1-3. Charging Part
Abnormal charging part
Yes
No
C434 at USB_5V or
C435 at EXT_5V =5V?
Resolder U402
Yes
When U401 is charging,
U401 pin #4 = "L" ?
No
Replace U401
Yes
No
Check the battery & TA
Check the
PMIC
Yes
END
10-5
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