Samsung X140 Service Manual Trouble Shooting
2. SGH-X140 Flow Chart of Troubleshooting
2-1.Baseband
2-1-1. Power ON
'Power On' does not work
Check the current consumption
Yes
Current consumption
>= 100mA
Yes
Check the Vbat Voltage
Voltage >=3.3V
Yes
Check the pin of U101
Pin#J12 >= 2.8V
Yes
Pin#A13 and
pin#A14 =2.8V
Yes
No
No
No
No
Download again
Charge the Battery
Check U101 and C112
pin#G11 =
1.8V
Yes
No
Check U101 and C115
Checktheclocksignalatpin#27ofU404
Freq = 13MHz
Vrms >=300mV
Vpp≒900mV
Yes
Check the initial operation
END
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
No
Check the clock generation circuit
(related to OSC401)
2-1
SGH-X140 Flow Chart of Troubleshooting
CFA
REWOPXT
PIXTXR
NIXTXR
PQXTXR
NQXTXR
PATUOA
NATUOA
PBTUOA
NBTUOA
PNICIM
NNICIM
PTUOCIM
NTUOCIM
PNIXUA
PTUOXUA
C
1
2
0
K23KLC
R
CM_M31KLC
1
0
2
TNI_PSD
NO_RWP
4
U
Y
1
5
V
G
3
C
N
0
C
D
A
2
R
1
1
0
211R
T
A
_
V
E
X
T
V
2
B
B
A
1
T
111R
J
I
G
_
O
N
1
Q
1
0
2
2
3
K
K
R
E
E
S
Y
Y
T
_
_
R
C
O
O
W
L
(
2
(
0
)
)
9D
7E
C
1
1
9
5B
6B
7D
6D
7C
6C
11P
21N
21R
21P
41N
41M
51N
51P
51M
41L
31K
31L
31R
31M
41R
4R
4P
6L
6M
4N
1D
6R
5P
3P
41C
51C
7L
9K
01N
9M
01L
R
9L
1
0
5
R
C
1
1
1
0
8
6
I
M
P
N
W
E
T
L
R
R
O
Q
_
D
K
Y
E
_
E
V
P
I
B
D
S
P
F
T
L
X
A
_
S
B
A
S
S
S
N
E
E
E
D
T
S
R
R
R
X
_
I
D
C
S
_
_
L
E
E
E
E
A
L
N
N
K
T
L
R
R
1
1
1
0
3
3
C
C
B
A
B
A
1
3
3
2
1
2
S
S
S
O
O
O
S
E
E
E
E
C
C
C
R
R
R
R
T
T
T
L
D
C
L
L
L
L
E
E
7
6
5
A
K
1
2
CFA
PXT
2FERAR
1FERAR
PIXTXR
NIXTXR
PQXTXR
NQXTXR
PATUOA
NATUOA
PBTUOA
NBTUOA
PNICIM
NNICIM
PTUOCIM
NTUOCIM
PNIXUA
NNIXUA
PTUOXUA
NTUOXUA
MCVXV
PGERV
NGERV
KCIAD
NRIAD
IDIAD
ODIAD
KLC_CTR
QANEOX
CM
7CN
RTNID
2WS_RWP
N1WS_RWP
FUB_1WSP
O_TESER
EDOM
PEEK_RWP
QRTNI
R
A
A
NE_GNR_BIV
T
D
D
C
C
C
C
C
H
_
H
_
_
_
A
C
V
A
A
_
I
L
R
S
R
R
U
U
M
E
E
E
E
X
X
N
N
S
F
F
2
1
A
H
D
E
E
D
F
1
1
1
9
1
1
1
2
0
0
0
5
4
V
R
R
T
C
E
F
A
L
A
R
M
D
H
S
_
D
P
X
R
_
O
E
N
A
G
A
4
6
O
C
T
L
4
C
H
_
B
D
R
V
E
1
1
R
1
0
9
S
E
R
P
S
W
_
E
I
O
N
T
D
D
D
D
S
S
S
S
P
P
P
P
_
_
_
_
A
A
A
A
B
B
B
B
(
(
(
(
0
1
2
3
)
)
)
)
R
C
E
E
F
5
6
5
5
O
O
O
O
C
C
C
C
T
T
T
T
L
L
L
L
3
2
1
0
S
D
I
_
V
V
P
B
E
S
A
X
C
T
T
E
M
E
1
1
7
3
4
U
P
_
S
D
I
N
P
K
L
L
L
1
6
3
1
5
2
3
A
A
A
R
R
I
A
|
O
B
B
B
B
W
E
3
2
1
0
S
N
E
T
N
_
C
S
P
S
S
C
C
D
S
L
V
V
V
O
N
K
L
L
L
V
D
D
_
_
_
D
A
P
P
P
O
O
O
C
S
S
S
_
_
_
C
C
C
C
2
1
3
J
F
G
N
K
A
L
1
8
1
8
1
7
1
2
4
3
1
U
U
U
P
P
P
_
_
_
S
C
S
C
D
S
L
O
K
TABV
C
1
1
3
C
1
1
6
C
1
1
4
C
1
1
1
C
1
1
7
C
1
1
2
C
1
1
5
_
A
B
(
0
:
8
)
D
D
D
D
D
S
S
S
S
S
P
P
P
P
P
_
_
_
_
_
A
A
A
A
A
D
D
D
D
D
D
D
D
D
B
B
B
B
B
S
S
(
(
(
(
(
P
P
4
5
6
7
8
_
_
)
)
)
)
)
D
D
B
B
(
(
0
1
)
)
M
M
N
K
K
K
K
1
5
2
7
1
2
2
A
A
A
A
D
D
A
B
B
B
B
B
B
B
4
6
5
7
8
1
0
U
1
0
1
V
V
V
V
V
V
V
L
L
L
L
L
L
L
D
D
D
5
5
4
4
S
S
O
S
O
O
S
_
_
_
_
_
_
_
B
A
B
A
6
4
5
C
B
D
A
A
B
B
1
1
1
1
1
9
1
1
2
4
0
2
0
C
1
2
2
G
D
C
S
M
S
_
_
T
T
X
X
_
_
E
E
N
N
D
S
S
S
S
S
S
S
S
P
P
P
P
P
P
P
P
_
_
_
_
_
_
_
_
D
D
D
D
D
D
D
D
B
B
B
B
B
B
B
B
(
(
(
(
(
(
(
(
5
6
7
8
2
9
3
4
)
)
)
)
)
)
)
)
G
G
H
K
F
F
J
J
3
5
1
4
4
3
5
6
D
D
D
D
D
D
D
D
B
B
B
B
B
B
B
B
3
2
9
8
7
6
5
4
L
L
R
E
E
I
V
N
D
D
V
I
G
B
1
2
L
V
_
_
_
_
D
V
D
D
D
D
R
O
S
R
R
R
R
T
_
I
M
C
V
V
V
V
7
C
F
H
K
F
G
G
1
1
1
1
1
1
1
3
5
1
2
2
3
2
V
C
C
B
V
C
C
A
V
R
F
V
C
C
D
V
C
C
_
1
.
8
A
D
S
P
_
D
B
(
0
:
1
5
)
D
D
D
D
D
D
S
S
S
S
S
S
P
P
P
P
P
P
_
_
_
_
_
_
D
D
D
D
D
D
B
B
B
B
B
B
(
(
(
(
(
(
1
1
1
1
1
1
0
1
2
3
4
5
)
)
)
)
)
)
D
D
E
E
F
F
2
3
2
3
2
3
D
D
D
D
D
D
B
B
B
B
B
B
1
1
1
1
1
1
1
5
4
3
2
0
S
S
I
I
M
S
M
I
_
_
M
R
C
_
S
L
I
O
K
T
K
K
J
1
1
1
1
1
4
2
6CN
1
5CN
01K
71SDNG
01J
NG
61SD
9J
51SDNG
8J
41SDNG
7J
31SDNG
9H
21SDNG
8H
11SDNG
7H
01SDNG
6H
9SDNG
01G
8SDNG
9G
7SDNG
8G
6SDNG
7G
5SDNG
01F
4SDNG
9F
3SDNG
8F
2SDNG
7F
1SDNG
31D
3CDA_XUA
4B
LTCO_DNG
4C
LTCO_DDV
31P
VDNG
11L
VDDV
6F
BDNG
6A
BDDV
01M
DDNG
11N
DDDV
6P
4SSV
2R
3SSV
4K
2SSV
5G
1SSV
4J
2OI_DDV
5N
1OI_DDV
6N
3DDV
3M
2DDV
3J
1DDV
11F
RUCH_DNG
51K
2CSP_DNG
51B
1CSP_DNG
8E
QDNG
31B
76DDV
01C
5DDV
U
U
P
V
V
P
U
_
D
D
_
P
R
C
D
D
_
S
L
1
3
I
O
K
T
2
4
R
P
J
C
N
1
1
1
1
9
3
1
0
0
C
1
0
4
S
S
S
I
I
I
M
M
M
C
D
R
L
S
A
K
T
T
A
C
1
0
8
C
1
0
9
C
1
0
7
1
0
9
N
N
N
C
C
C
C
1
0
2
C
1
0
3
V
B
A
T
501C
C
1
0
6
8
7
6
4
5
3
2
1
N
I
G
V
C
V
V
C
/
O
P
C
C
C
L
N
N
K
P
C
C
D
1
0
1
V
R
F
C
1
0
1
V
C
C
A
V
C
C
D
C
1
1
0
R
1
0
8
2-2
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
V
R
T
C
D
1
0
1
R
1
0
1
P
O
S
M
1
0
1
N
E
G
SGH-X140 Flow Chart of Troubleshooting
VRF
GSM_PAM_IN
DPCS_PAM_IN
GSM_LNA_IN_N
GSM_LNA_IN_P
DCS_LNA_IN_N
DCS_LNA_IN_P
C434
C436
C417
C418
26
27
22
23
24
D
O
F
R
21
RFIGN
20
RFIGP
19
RFIDN
18
RFIDP
17
RFIPN
16
RFIPP
15
GND
25
G
1
2
O
G
G
F
A
I
A
R
I
D
D
K
I
L
D
C
S
S
1314
N
E
X
U404
N
E
S
_
12
28
29 30
D
N
P
T
G
Q
U
X
O
R
X
N
D
D
O
P
D
D
_
V
S
9
11
10
C419
XOENA
13MHZ_SI
32
31
33
34
D
D
D
D
D
N
N
N
N
D
35
G
G
G
G
V
GND
36
GND
1
RXQN
2
RXIP
3
RXIN
4
TXIP
5
TXIN
6
TXQP
7
N
I
TXQN
X
8
CLK13M_RF
SI_EN
SERLE
SERCLK
SERDAT
RXTXIP
RXTXIN
RXTXQP
RXTXQN
AFC
R423
C443
2
OSC401
1
T
VCC
V
OUT
GND
C430
C429
C431
VRF
R422
4
3
C449
C442 R424
CLK13M_RF
2-3
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
SGH-X140 Flow Chart of Troubleshooting
2-1-2. Initial
Initial Failure
Yes
The pin #G11 of U101 =
1.8V and
the pin #J12 of U101 =
2.8V ?
Yes
No
(if it has some problem, it is to be replaced.)
Check the U101
Is the pin #K9 of U101
"Low→High" ?
Yes
There is 32.768kHz wave
forms at the C220 and
C221
Yes
Is the pin #A4 of U101
is "High"
Yes
The voltage is "High" at
the C112,C115,C116
Yes
LCD display is O.K
No
No
No
No
No
(if it has some problem, it is to be replaced.)
Check the U101
Check the U201
Check the U404
Check the U101
Check the LCD part
Yes
No
Sound is O.K
Yes
END
Check the Audio part
2-4
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
A(21)
YMU_LED
DLC_DETECT
D(0:15)
A(0:20)
KEY_COL(0:4)
KEY_ROW(0:4)
DEBUG_DTR
DEBUG_RTS
DEBUG_TXD
DEBUG_RXD
DEBUG_CTS
CHG_DET
SDS_TXD
SDS_RXD
SGH-X140 Flow Chart of Troubleshooting
VRTC
VCCD
VCC_1.8A
VCC_1.8A
VCC_1.8A
D
D
V
1
X
T
/
3
1
A
P
7
5
1
R
A
D
D
V
U201
1
X
R
/
4
1
A
P
3
G
VCCD
C215
6
3
1
1
4
1
2
1
E
G
R
R
R
T
D
D
D
D
D
D
D
D
D
D
D
D
D
D
V
V
V
V
V
V
V
A
T
A
K
D
L
_
C
K
0
_
C
0
M
S
O
I
S
M
/
_
M
M
S
A
/
P
_
_
T
K
C
P
P
/
A
L
C
C
1
/
/
D
C
2
0
9
_
_
A
2
1
M
M
P
I
A
I
A
X
S
P
S
P
1
4
2
0
6
2
1
1
J
L
L
K
U
N
C230
C211
C216
6
6
5
4
7
6
1
1
1
1
1
2
1
1
8
N
E
U
E
U
B
P
M
U
E
E
E
E
E
E
E
E
E
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
V
V
V
V
V
V
V
V
V
A
T
T
A
D
_
1
M
S
/
2
2
A
P
K
E
L
2
3
S
C
M
M
E
_
R
1
0
1
W
W
_
P
P
M
M
M
/
/
1
H
O
S
3
4
O
/
/
/
M
S
2
2
6
7
5
A
W
A
A
2
2
2
L
P
P
P
A
A
A
F
X
X
X
P
P
P
4
6
5
3
5
2
4
F
H
R
H
G
G
M
1
B
E
D
D
V
4
E
6
5
0
1
1
1
E
F
G
L
L
F
L
L
E
P
P
R
D
D
V
_
_
S
D
S
D
V
V
A
B
K
Q
Q
E
E
C
Q
R
R
A
R
_
_
_
T
T
D
T
/
/
/
/
3
4
7
8
3
3
1
1
A
N
A
A
P
P
P
P
7
3
7
1
1
1
P
N
M
C231
1
2
0
7
1
8
1
1
1
E
C
F
D
C
I
A
A
C
B
K
T
T
S
D
C
S
S
R
D
V
V
R
V
X
CKO/IACK/ERAMHI
IOBIT[2]/VEC[3]/EROMHI
IOBIT[1]/VEC[4]/PLLTOA
XTIC_MODE
XCPTSTSTOP_CKO
XBSWN
XRTCALARM_N
N
T
S
S
I
O
K
XOSC32OUT
D
R
D
C
M
T
T
T
T
T
_
_
_
_
_
P
P
P
P
P
C
C
C
C
C
X
X
X
X
X
7
7
9
8
3
1
F
C
D
G
D
DB#15
DB#14
DB#13
DB#12
DB#11
DB#10
X1RTC
X2RTC
C214
VREF
CLK13M_TR
TR_RST
TP209
F12
TDO
F15
TP201
TRST
TP210
H12
TDI
G12
TP211
TMS
TP213
H13
TCK
G15
L12
K11
N4
INT#0
R12
IO7
TP206
U5
RWN
T17
AB#8
T14
AB#7
R14
AB#6
P12
AB#5
P11
AB#4
N11
AB#3
R13
AB#2
M10
AB#1
U13
AB#0
P10
R11
T11
U11
M8
N8
N7
DB#9
P7
DB#8
M6
DB#7
R7
DB#6
T7
DB#5
U7
DB#4
P6
DB#3
R6
DB#2
U6
DB#1
P5
DB#0
R206
D12
M12
D11
XAG3
E11
XAG2
A11
XAG1
B11
XAG0
B7
A7
D10
E8
C6
TP202
TP203
TP204
TP205
R217
DSP_AB(8)
DSP_AB(7)
DSP_AB(6)
DSP_AB(5)
DSP_AB(4)
DSP_AB(3)
DSP_AB(2)
DSP_AB(1)
DSP_AB(0)
DSP_DB(15)
DSP_DB(14)
DSP_DB(13)
DSP_DB(12)
DSP_DB(11)
DSP_DB(10)
DSP_DB(9)
DSP_DB(8)
DSP_DB(7)
DSP_DB(6)
DSP_DB(5)
DSP_DB(4)
DSP_DB(3)
DSP_DB(2)
DSP_DB(1)
DSP_DB(0)
DSP_TDO
TR_RST
DSP_TDI
DSP_TMS
DSP_TCK
DSP_INT
DSP_IO
DSP_RWN
DSP_AB(8:0)
DSP_DB(15:0)
ICHRG
TR_RST
RTCALARM
CLK32K
C220
CP_TDO
TR_RST
CP_TDI
CP_TMS
CP_TCK
DEBUG_DSR
XLATCH_CS
JACK_IN
PWR_KEEP
SIMRST
DEBUG_RI
FLASH_RESET
I2C_DATA
I2C_CLK
UP_CS
UP_SCLK
UP_SDO
UP_SDI
SIMCLK
SIMDATA
OSC201
VCCB
U203
2
1
VO
VS
GND
R205
3
VCCB
8
0
2
R
VBAT
21
R211
R212
C221
BP_VF
C222
KEY_LED_EN
R220
A(22)
R215
R203
0
6
4
5
7
3
1
1
1
9
1
L
L
1
2
H
L
N
2
D
C
C
N
N
2
5
0
D
N
N
A
S
S
V
_
C
C
5
_
_
3
3
XCP_D0
XCP_D1
XCP_D2
XCP_D3
XCP_D4
XCP_D5
XCP_D6
XCP_D7
XCP_D8
XCP_D9
XCP_D10
XCP_D11
XCP_D12
XCP_D13
XCP_D14
XCP_D15
XCP_A0_BEON
XCP_A1
XCP_A2
XCP_A3
XCP_A4
XCP_A5
XCP_A6
XCP_A7
XCP_A8
XCP_A9
XCP_A10
XCP_A11
XCP_A12
XCP_A13
XCP_A14
XCP_A15
XCP_A16
XCP_A17
XCP_A18
XCP_A19
XCP_A20
XCP_A21
XCP_CSROMEN
XCP_CSRAMEN
XPA0/CS1N
XPA1/CS2N
XPA2/CS3N
XPA3/CS4N
XCP_WEN
XPA4/OEN
XPA5/WAITN
XPA6/BE1N
XPA7/IRQ1
XPA8/IRQ2
XPA9/IRQ3
XPA10/IRQ4
2
A
2
3
P
A
A
X
_
P
6
X
3
A
P
X
F
M
M
P
R
A
O
C
E
R
P
R
0
I
I
I
P
E
_
_
_
_
K
Z
S
S
S
S
L
I
C
C
S
C
C
C
_
_
_
_
_
_
R
R
R
R
R
R
T
T
T
T
T
T
/
/
/
/
/
/
]
]
]
]
]
]
3
4
1
2
5
0
[
[
[
[
[
[
B
B
B
B
B
B
K
K
K
K
K
K
_
_
_
_
_
_
P
P
P
P
P
P
C
C
C
C
C
C
4
5
3
3
4
1
2
L
L
T
T
U
R
M
LCD_CS
INTRQ
F_WP_
KEY_COL(0)
KEY_COL(1)
KEY_COL(2)
KEY_COL(3)
KEY_COL(4)
A6
B5
F8
F7
C5
D6
E7
D5
C4
B4
B3
C1
C2
D2
D3
E3
B13
F11
E14
D15
B15
C14
A16
A15
B17
C17
D16
F14
G14
G13
G17
J12
K12
K13
K14
L14
L15
L16
A12
A13
M15
M14
M11
N14
C13
P16
P15
T15
M9
T5
P2
N2
D(0)
D(1)
D(2)
D(3)
D(4)
D(5)
D(6)
D(7)
D(8)
D(9)
D(10)
D(11)
D(12)
D(13)
D(14)
D(15)
A(0)
A(1)
A(2)
A(3)
A(4)
A(5)
A(6)
A(7)
A(8)
A(9)
A(10)
A(11)
A(12)
A(13)
A(14)
A(15)
A(16)
A(17)
A(18)
A(19)
A(20)
CP_CSROMEN
CP_CSRAMEN
R207
CP_CSROM2EN
BACKLIGHT_EN
YMU_EN
CP_WEN
CP_OEN
DEBUG_DCD
UPPER_BYTE
EAR_SWITCH
YMU_IRQ
KEY_ROW(0)
KEY_ROW(1)
KEY_ROW(2)
KEY_ROW(3)
KEY_ROW(4)
1
0
1
7
1
9
6
7
8
1
6
1
7
K
J
L
M
L
K
J
L
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
V
V
V
V
V
V
V
V
A
M
0
D
C
T
_
1
E
T
O
E
X
N
Z
R
E
I
G
X
P
S
N
X
_
_
_
_
R
T
R
R
R
R
A
A
T
T
T
T
/
/
D
D
/
/
]
]
]
]
R
R
9
6
7
8
I
I
[
[
[
[
/
/
1
2
B
B
B
B
1
1
K
K
K
K
A
A
_
_
_
_
P
P
P
P
P
P
X
X
C
C
C
C
3
3
5
1
4
3
F
T
P
K
N
N
1
1
7
3
2
6
C
H
H
G
G
F
A
A
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
V
V
V
V
V
V
V
V
0
0
1
0
X
X
M
1
0
M
R
T
/
/
M
O
M
O
I
I
I
6
5
I
/
/
/
/
1
1
1
9
0
8
A
A
3
2
3
2
P
P
A
A
A
A
X
X
P
P
P
P
3
1
4
6
5
1
L
F
E
H
G
G
2-5
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