Samsung GT-S9402 Troubleshooting
10. Flow Chart of Troubleshooting
10-1.
Power On
Power On'does not work
'
Check the Battery Voltage
Yes
is more than
VDD_IO_HIGH_2.9V
+
=2.9
Check the Clock at
OSC400
=32
3.4V
Yes
V??
Yes
KHZ
??
No
No
No
Change the Battery
Check the PMU(UPL400)
Resolder OSC
400
Yes
VDD_IO_LOW
+
VDD_GSM_CORE
+
Check the initial operation
=1.2
H"?
"
END
Yes
V?
Yes
Yes
_1.8V
_1.2V
No
Check the C417
No
Check the C441
10-1
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
S
_
E
M
T
T
A
B
C
+
_
IO_
D
H
D
V
IGH
_
2
9
.
V
A
+
D
V
_
D
2
6
.
V
D
D
V
_
L
+
S
_
E
P
2
E
.
9
V
D
D
V
_
U
S
B
+
_
3
3
V
.
O
D
C
E
C
_
N
E
C
C
U
P
M
_
N
I
T
_
M
M
I
S
O
F
F
n
_
M
R
T
O
S
N
_
M
R
M
F
_
E
O
N
_
W
P
R
2
N
E
3
2
K
H
T
z_D
_
IGI
M
+
D
D
V
_
D
A
C
_
D
V
_
D
A
3
.
0
V
D
V
+
D
_
T
_
B
3
0
.
V
+
D
D
Y
V
_
E
K
_
3
.
3
V
4
1
R
4
1
4
2
4
3
4
R
8
6
4
1
C
8
4
C
2
0
4
C
2
2
C
4
2
4
C
4
2
7
8
S
O
4
C
0
0
0
R
4
2
3
2
5
T
P
4
0
1
O
S
2
O
S
4
T
P
0
0
3
_
R
I
4
M
I
S
5
_
S
6
I
S
M
7
_
R
8
P
G
9
G
P
1
0
G
P
1
1
P
1
C
W
1
2
P
W
1
3
S
V
5
7
S
V
4
3
7
C
C
4
3
8
4
3
T
A
B
R
4
1
7
V
D
+
D
_
L
P
L
_
1
9
2
6
8
5
5
5
5
C
C
D
D
N
N
D
D
V
V
I
C
C
C
L
L
C
O
Q
C
C
H
K
R
M
I
S
H
C
IOH
C
O
M
_
I
F
S
F
|
T
S
H
C
O
3
2
O
1
O
R
E
N
1
R
N
E
2
K
D
D
2
D
3
D
S
V
K
V
5
L
4
S
C
D
D
4
6
5
1
1
1
T
B
A
V
9
C
4
4
0
V
4
T
A
0
0
2
.
V
1
9
0
8
7
6
5
5
4
3
5
4
5
4
4
T
D
D
D
A
D
D
D
B
V
V
V
1
3
V
P
1
D
D
L
D
U
L
P
T
T
D
A
A
B
B
D
X
D
L
V
V
V
D
D
D
D
D
V
6
C
C
C
C
D
D
D
D
D
7
3
8
9
0
1
5
1
1
2
L
4
0
0
2
4
5
4
4
4
4
T
D
D
T
D
C
D
A
A
D
D
D
C
D
B
B
V
V
V
V
2
D
V
V
2
V
C
O
M
I
I
F
H
S
R
B
4
1
2
V
0
0
D
D
C
D
C
S
C
K
N
R
O
C
I
E
M
A
L
I
M
M
D
S
M
C
I
I
I
S
S
S
S
_
S
2
3
4
5
6
2
2
2
2
2
4
C
1
7
C
4
1
9
C
4
2
1
4
C
2
3
C
4
2
5
R
4
2
1
T
4
B
A
1
0
4
4
D
E
V
D
3
9
A
V
S
S
V
1
S
F
V
R
3
8
C
V
H
G
3
7
U
N
I
V
S
B
3
6
H
C
U
G
C
R
3
5
_
R
C
E
2
3
4
_
R
E
C
1
3
3
A
N
T
S
E
E
S
3
2
A
S
I
V
3
1
F
G
N
E
R
D
3
0
F
C
E
R
2
9
S
C
A
M
B
I
I
2
8
_
E
K
O
N
Y
N
2
7
E
T
C
N
M
I
S
V
+
4
5
R
3
4
1
1
C
3
4
2
R
2
4
C
4
3
3
C
4
3
5
D
_
D
IO_
L
O
_
W
4
R
R
C
4
8
1
V
.
2
7
C
4
4
1
V
_
D
+
IO_
D
W
L
_
O
1
8
.
V
+
D
D
F
A
V
_
A
H
_
2
6
.
V
M
I
S
V
_
C
M
C
D
D
V
_
+
R
_
X
T
X
_
2
.
8
V
V
C
+
C
_
Y
S
.
8
V
N
_
2
1
C
4
2
0
0
4
3
2
3
6
6
2
_
T
V
_
E
X
C
H
A
R
_
G
E
5
V
U
B
S
V
_
+
5
V
4
C
2
9
A
T
B
V
A
J
C
_
N
K
I
U
A
X
_
O
N
C
4
3
4
R
4
2
4
C
I
S
M
A
_
I
B
_
2
1
.
5
V
Y
N
E
K
O
N
S
L
C
S
D
A
D
D
V
_
+
G
S
M
_
R
C
_
E
O
1
2
.
V
10-2
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This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
10-2.
Initial
Initial Failure
Yes
UCP200 pin RSTON
CP200pin RSTEXTn="H"?
U
Check the16bit data signal
memory CE
&
_M ="
Yes
Yes
H"?
No
No
Check the circuit related to reset
Check theUCP
200
END
Yes
10-3
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
T
E
S
R
E
B
B
T
S
R
T
X
E
T
R
S
T
R
S
T
K
C
L
I
T
C
K
R
T
T
7
W
I
N
7
Y
I
P
6
W
N
Q
6
Y
Q
P
2
G
N
_
9
B
N
_
8
E
N
_
1
K
N
_
9
C
I
2
3
C
8
T
S
2
P
C
K
2
L
K
C
1
G
I
D
T
R
T
S
T
S
R
E
T
S
R
H
K
2
3
C
T
R
C
_
K
T
_
I
D
T
N
I
_
X
T
X
R
_
P
I
_
X
T
_
X
R
Q
N
_
X
T
X
_
R
Q
P
_
X
T
_
X
R
n
T
X
E
M
O
_
N
n
T
X
M
_
T
I
G
I
D
_
z
M
_
K
M
M
10-4
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
10-3.
Charging Part
Abnormal charging part
V_EXT_CHARGE_5V(UPL400)
UPL400 pin
Check the
>5V
AUX_ON)
34(
L"?
="
Yes
Yes
Yes
No
No
Check the C429
Check the circuit related to
AUX_ON signal
Check the UPL400 pin
≒
1.4V
Yes
END
46
No
Resolder or replace UPL400
10-5
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
E
M
S
B
_
A
T
T
V
D
+
O
G
_
_
D
_
H
I
9
I
2
H
V
.
A
+
D
V
D
_
2
.
6
V
V
D
_
+
D
S
E
L
E
P
_
9
2
V
.
V
D
_
+
D
U
S
B
_
3
3
V
.
T
N
_
_
P
U
M
I
M
O
M
F
S
F
I
n
_
M
R
S
T
O
N
_
M
E
R
F
O
_
N
_
M
R
2
P
E
W
N
3
2
K
H
T
_
z
_
I
M
G
D
I
V
_
+
D
D
D
A
C
A
_
D
V
D
_
0
3
V
.
D
V
D
_
+
B
T
_
0
3
V
.
V
+
D
D
_
K
E
Y
_
3
3
V
.
V
B
A
T
R
1
4
4
C
R
4
6
1
4
C
C
4
C
4
4
C
4
C
2
8
O
S
4
C
0
0
4
C
3
0
T
P
4
0
0
4
R
2
3
R
4
5
2
T
P
4
0
1
4
C
3
7
7
1
8
1
8
2
0
2
2
2
4
C
2
4
7
1
O
S
2
S
O
3
_
I
4
S
I
5
_
S
6
S
I
7
_
R
8
P
G
9
P
G
1
0
P
G
1
1
P
W
1
2
P
W
1
3
V
S
5
7
V
S
4
C
3
8
4
C
NC
C
I
O
C
Q
R
K
C
M
R
M
I
M
O
I
S
T
H
3
O
2
O
1
O
E
R
E
R
S
S
3
9
V
_
+
D
D
56
58NC59
LCVDD
C
H
S
H
C
C
H
|
_
M
S
I
C
N
1
N
2
CLK32K14D4VDD15D5VDD
V
B
A
T
A
4
0
0
P
L
_
L
2
1
V
.
49
50
51
52
LCVDD
D1VBAT
O
F
F
16
T
4
C
4
0
D6VDD17DCDLX
46
47
55
42
43
44
45
VBAT
VBAT
IOVDD
LPVDD48D3VDD
D1VDD
D2VDD
HCVDD
SIMVCC
0
0
22
SIMCKCD23SIMIOCD24_SIMRSCD
25
V
26
U
P
4
L
DCDVBAT
DCDVDD20SDA21SCL
DCDVBAT
18
19
53
L
4
0
0
C
1
4
7
4
C
1
9
4
C
2
1
4
C
2
3
C
4
2
5
40
9
3
V
S
S
VSAVE
RF1VDD41RF2VDD
8
3
V
G
H
C
3
7
U
S
B
V
N
I
4
R
2
2
3
6
C
G
U
H
C
R
3
5
_
R
2
E
C
3
4
_
R
1
E
C
3
3
B
A
T
S
E
N
S
E
C
4
3
3
3
2
V
S
I
A
3
1
E
R
N
F
G
D
4
C
3
5
3
0
R
E
F
C
2
9
A
C
S
B
I
I
M
2
8
_
N
O
K
E
Y
2
7
N
T
C
SIMEN
SIMEN
V
+
D
D
_
O
_
I
L
O
54
W
R
4
R
2
1
B
A
T
4
0
0
1
3
4
R
C
4
3
4
C
1
4
R
3
2
R
4
2
4
C
3
6
_
1
.
8
V
4
2
7
4
C
4
1
_
L
V
D
O
_
+
D
I
_
O
W
8
1
V
.
+
A
V
D
_
D
H
F
A
_
6
2
V
.
S
M
I
V
C
C
M
_
+
D
V
D
_
X
_
X
R
V
8
2
T
_
.
V
C
_
+
C
S
Y
_
N
8
2
V
.
1
4
C
2
6
2
V
_
E
X
T
_
C
A
R
H
E
G
_
5
V
V
+
S
B
U
_
5
V
2
9
V
B
A
T
J
K
A
C
_
I
N
A
U
X
_
O
N
4
C
3
4
4
_
C
I
M
A
S
B
I
_
2
.
1
5
V
O
K
N
E
Y
N
L
S
C
A
S
D
V
D
_
+
D
G
S
_
M
O
E
C
R
2
_
V
.
1
10-6
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
10-4.
Master
1)
Sim Part
Phone can't access SIM Card(slot1)
SIM200 pin
Check SIM_CLK_1Signal on
pin3 of SIM200 inafew second
Yes
SIM_VCC_1)
1,5(
H"?(C227)
="
Yes
After Power ON,
No
Resolder or replace UPL400
No
Check the Clock Signal
After SIM card insert,
SIM200 pin
2="
Check the SIM Card
Yes
H(SIM_RST
C226)
(
END
Yes
Yes
_1)"?
No
Replace PBA
10-7
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
1
_
O
_
I
M
I
S
1
_
C
C
V
_
M
I
S
2
2
2
R
0
0
2
M
I
S
1
1
2
I
I
S
1
_
K
L
C
_
M
7
2
2
C
6
2
C
2
5
2
2
C
4
2
2
C
1
_
T
S
R
M
_
S
2
3
3
7
7
8
8
9
9
G
G
6
1
1
6
6
5
5
4
4
2
1
2
1
1
1
1
1
0
1
0
1
G
G
3
4
1
1
5
10-8
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Slave
2)
Phone can't access SIM Card(slot2)
Yes
SIM900 pin
="
SIM_VCC_2)
1,5(
H"?(C916)
Yes
Flow Chart of Troubleshooting
No
Resolder or replace UPL900
After Power ON,
Check SIM_CLK_2Signal on
pin3 of SIM900 inafew second
Yes
After SIM card insert,
SIM900 pin
Check the SIM Card
2="
C919)
(
END
H(SIM_RST
Yes
Yes
_2)"?
No
Check the Clock Signal
No
Replace PBA
10-9
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
O
S
I
M
I
_
R
M
I
_
S
S
T
S
M
I
_
L
K
C
S
M
I
_
C
2
C
V
_
R
8
0
9
_
2
S
M
I
0
0
9
2
_
_
2
1
9
6
C
C
C
9
C
9
8
1
1
9
9
1
2
3
7
7
8
7
1
8
9
9
G
G
G
1
1
1
5
6
6
5
4
2
1
1
2
1
1
1
1
0
1
1
0
G
1
3
4
10-10
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
10-5.
Microphone Part
Microphone does not work
Yes
Check the connection
from MIC to Analog s/w
Yes
Check the circuit
from UCP200 to MIC
Yes
No
No
Resolder Analog s/w
U511,512)
(
Resolder the U5511, U512, U501,
R500, R503, C501, C504
R502, C503
Check the circuit
from UCP800 to MIC
Yes
Check the MIC
Yes
END
No
No
Resolder the U511, U512, U501
R512, R514, C518, C520
R513, C519
Replace MIC(MIC500)
10-11
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
MIC_BIAS_2.15V
TA500
R504
EARMIC_P EAR_MIC_P
EARMIC_N EAR_MIC_N
R506
R508
R510
R511
MIC500
POWER
POWER
U511
+VDD_IO_HIGH_2.9V
R505
MIC_BIAS_2.15V
1
2
GND1
3
GND2
OUT4OUT
MICIN_P
+VDD_IO_HIGH_2.9V
MIC_SEL_N_M
MIC_SEL_N
MIC_SEL_N_S
6
7
2
D
S
N
2
G
8
5
SEL2
1S2
4
9
SEL1
D2
3
10
D1
2S1
C
1
C
S
V
1
1
2
U512
MICIN_P
MIC_SEL_P
R509
EAR_MIC_P
7
6
2
D
S
N
2
G
8
5
SEL2
1S2
9
4
D2
SEL1
3
10
D1
2S1
C
1
C
S
1
V
1
2
MIC_PATH_SEL
MIC_SEL_P_M
MIC_SEL_P
MIC_SEL_P_S
MIC_SEL
MIC_SEL_N
EAR_MIC_N
MIC_SEL_P_M
MIC_SEL_N_M
MIC_SEL_P_S
MIC_SEL_N_S
C500
R500
R503
C501
C504
MIC_P_M
MIC_N_M
+VDD_ADC_2.9V
C505
L500
C506
C508
C509
MICIN_P
C510
ANL
C514
EAR_MIC_P
C515
EAR_MIC_N
C516
R512
C518
R514
C520
MIC_P_S
MIC_N_S
ANR
U501
C507
D3
LIN1
C5
LIN2
C6
LIN3|GPI7
B6
LIN4
C2
NC
D1
NC
B4
NC
D4
RIN1
D6
RIN2
D5
RIN3|GPI8
E5
RIN4
D2
NC
E1
NC
B5
NC
C1
NC
A1
NC
A4
NC
C4
NC
+VDD_IO_LOW_1.8V
6
5
6
6
F
G
A
A
C
D
D
D
N
D
D
D
V
V
V
A
B
C
D
D
D
D
D
N
N
N
G
G
G
A
D
A
3
3
6
E
B
A
2
B
CSB|ADDR
1
B
C502
C
N
F2
E3
SDIN
G5
BCLK
F1
SCLK
F5
MCLK
A2
MICBIAS
MODE
VMID
ADCDAT
ADCLRC
NC
NC
GPIO3
GPIO4
GPIO5
NC
NC
D
N
G
A
C512
E2
C3
C513
F4
E4
F3
G4
G2
G3
G1
1
2
SDA
I2S_SCK_MV
SCL
ADC_CLK
I2S_SDATAIN
I2S_WS_MV
10-12
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Flow Chart of Troubleshooting
10-13
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
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