Samsung SGH-X140 User manual

GSM TELEPHONE
SGH-X140
GSM TELEPHONE CONTENTS
1. Specification
2. Flow Chart of Troubleshooting
3. Exploded Views and Parts List
4. Electrical Parts List
5. PCB Diagrams
6. Block Diagrams

Samsung Electronics Co.,Ltd. Feb. 2005
Printed in Korea.
Code No.: GH68-06385A
BASIC.
ⓒ
This Service Manual is a property of Samsung Electronics Co.,Ltd.
Any unauthorized use of Manual can be punished under applicable
International and/or domestic law.

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1. SGH-X140 Specification
1-1
This Document can not be used without Samsung's authorization
1-1. GSM General Specification
GSM900
Phase 1
EGSM 900
Phase 2
DCS1800
Phase 1
Freq. Band[MHz]
Uplink/Downlink
890~915
935~960
880~915
925~960
1710~1785
1805~1880
ARFCN range 1~124 0~124 &
975~1023 512~885
Tx/Rx spacing 45MHz 45MHz 95MHz
Mod. Bit rate/
Bit Period
270.833kbps
3.692us
270.833kbps
3.692us
270.833kbps
3.692us
Time Slot
Period/Frame
Period
576.9us
4.615ms
576.9us
4.615ms
576.9us
4.615ms
Modulation 0.3GMSK 0.3GMSK 0.3GMSK
MS Power 33dBm~13dBm 33dBm~5dBm 30dBm~0dBm
Power Class 5pcl ~ 15pcl 5pcl ~ 19pcl 0pcl ~ 15pcl
Sensitivity -102dBm -102dBm -100dBm
TDMA Mux 8 8 8
Cell Radius 35Km 35Km 2Km

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SGH-X140 Specification
1-2
This Document can not be used without Samsung's authorization
1-2. GSM TX power class
TX Power
control level GSM900
533±2dBm
631±2dBm
729±2dBm
827±2dBm
925±2dBm
10 23±2dBm
11 21±2dBm
12 19±2dBm
13 17±2dBm
14 15±2dBm
15 13±2dBm
16 11±3dBm
17 9±3dBm
18 7±3dBm
19 5±3dBm
TX Power
control level DCS1800
030±3dBm
128±3dBm
226±3dBm
324±3dBm
422±3dBm
520±3dBm
618±3dBm
716±3dBm
814±3dBm
912±4dBm
10 10±4dBm
11 8±4dBm
12 6±4dBm
13 4±4dBm
14 2±5dBm
15 0±5dBm

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2. SGH-X140 Flow Chart of Troubleshooting
2-1
This Document can not be used without Samsung's authorization
2-1.Baseband
2-1-1. Power ON
'Power On' does not work
Voltage >=3.3V
Download again
Charge the Battery
Pin#J12 >= 2.8V Check U101 and C112
Pin#A13 and
pin#A14 =2.8V Check U101 and C115
Freq = 13MHz
Vrms >=300mV
Vpp≒900mV
Check the clock generation circuit
(related to OSC401)
Check the initial operation
END
No
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
pin#G11 =
1.8V
No
Yes
Check the current consumption
Check the Vbat Voltage
Check the pin of U101
Checktheclocksignalatpin#27ofU404
Current consumption
>= 100mA

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SGH-X140 Flow Chart of Troubleshooting
2-2
This Document can not be used without Samsung's authorization
R106
VRF
111R
C116
C113
Q102
13
2
VCCD
C107
VCCD
C117
M101
NEG
POS
C104
C106
C110
211R
R113
R109
VRTC
TABV
4K
2SSV
2R
3SSV
6P
4SSV
31R MCVXV
1D QANEOX
A13
VLDO_3
B12
VLDO_4
B10
VLDO_5
A14
VLDO_6
C12
VLDO_7
A10
VREF
41R NGERV
31M PGERV
H11
VRTC
K12
VSIM
5G
1SSV
2OI_DDV
4C
LTCO_DDV
E14
VEXT
F15
VIB_DRV
9L NE_GNR_BIV
VL4S_AA12
B11
VL4S_B
D10
VL5S_A
C9
VL5S_B
G11
VLDO_1
J12
VLDO_2
3J
J13
VDD12
3M
2DDV
6N
3DDV
C11
VDD34
01C
5DDV
31B
76DDV
6A
BDDV
11N
DDDV
11L
VDDV
5N
1OI_DDV
4J
SERLE2
A2
K14
SIM_CLK
J11
SIM_IO
SIM_RSTK11
7E PXT
UP_CLKN9
P10
UP_IO
R10
UP_RST
F14
VACC
E13
VBAT
1DDV
RWN
6D NIXTXR
PIXTXR
7D
6C NQXTXR
7C PQXTXR
L8
SCLK_PSC
M7
SDI_PSC
N7
SDO_PSC
C2SERCK
SERDA
C1
SERLE1
B1
FUB_1WSP
9M PEEK_RWP
51C N1WS_RWP
41C 2WS_RWP
6B 1FERAR
5B 2FERAR
RESETN_CSP
R3
O_TESER
9K
RING_DRVF13
RTC_ALMNH10
4N KLC_CTR
L2
2
6CN
5P 7CN
E6OCTL0
OCTL1
C5
F5OCTL2
OCTL3
E5
OCTL4
A4
G6OCTL5
B3OCTL6
OCTL7
A3
7L
QRTNI
I|O
L3
G13
LED1_DRV
G12
LED2_DRV
6R CM
41M NNICIM
41N PNICIM
51P NTUOCIM
51N PTUOCIM
01N EDOM
5CN 1
4SDNG
7G
5SDNG
8G
6SDNG
9G
7SDNG
01G
8SDNG
6H
9SDNG
31P
VDNG
11F
RUCH_DNG
4B
LTCO_DNG
51B
1CSP_DNG
51K
2CSP_DNG
01L
01SDNG 7H
8H
11SDNG
21SDNG 9H
7J
31SDNG
8J
41SDNG
9J
51SDNG
01J
61SD
NG
01K
71SDNG
8F
2SDNG
9F
3SDNG
01F
DB4
J6
H5DB5
DB6
G3
G4DB7
F4DB8
F1DB9
3P RTNID
6F
BDNG
01M
DDNG
8E
QDNG
7F
1SDNG
NRIAD
K1DB0
K2DB1
DB10
F2
F3DB11
E2DB12
E3DB13
D3DB14
D2DB15
K3DB2
DB3
J5
31K PTUOXUA
3CDA_XUA 31D
E11
CH_BDRV
F12
CH_ISEN
D14
CH_RES
CREFE9
CSN_PSCK8
4R KCIAD
6L IDIAD
6M ODIAD
4P
AB8
E10
ADC_AUX1
D15
ADC_AUX2
9D CFA
21N NATUOA
11P PATUOA
21P NBTUOA
21R PBTUOA
41L NNIXUA
51M PNIXUA
31L NTUOXUA
K6AB0
AB1
P1
L5AB2
AB3
N1
N2AB4
AB5
M2
AB6
M1
AB7
K7
K5
C114
U101
VBAT
C120
C112
R102
C118
VCCB
3
GND
5
VCC
4Y
C115
U102
2
A
1
B
501C
R110
C111
R103
R105
C122
C119
VCCA
VBAT
C103
R101
C102
VRF
VCC
1
VCC
2
VPP
5
CLK
3
GND
4
6I/O
7NC
8NC
9NC
10NC
CN101
C108
VCCA
C101
C109
R108
VCC_1.8A
D101
PNIXUA
PTUOXUA
MELODY_VIB
PBTUOA
NBTUOA
CFA
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)
TA_VEXT
JIG_ON
DSP_DB(4)
DSP_DB(3)
DSP_DB(2)
DSP_DB(15)
DSP_DB(14)
DSP_DB(13)
DSP_DB(12)
DSP_DB(11)
DSP_DB(10)
DSP_DB(1)
DSP_DB(0)
UP_CS
PATUOA
NATUOA
TX_BAND_SEL
XOENA
PTUOCIM
NTUOCIM
PNICIM
NNICIM
CM_M31KLC
DSP_IO
TNI_PSD
DSP_DB(9)
DSP_DB(8)
DSP_DB(7)
DSP_DB(6)
DSP_DB(5)
UP_SCLK
PQXTXR
NQXTXR
PIXTXR
NIXTXR
DSP_RWN
K23KLC
RTCALARM
RST
FLASH_RESET
NO_RWP
PWR_KEEP
TX_EN
SI_EN
DCS_TX_EN
GSM_TX_EN
SIMRST
SIMDATA
SIMCLK
REWOPXT
SERLE
UP_SDO
UP_SDI
SERCLK
SERDAT
DSP_AB(0:8)
DSP_DB(0:15)
KEY_COL(2)
KEY_ROW(0)
INTRQ
VREF

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SGH-X140 Flow Chart of Troubleshooting
2-3
This Document can not be used without Samsung's authorization
C419
C417 C418
C430
C434
C429
C436
12
7
TXQP 6
D
D
V
9
D
D
V
32
26
N
E
X
N
I
X
8
T
U
O
X
27
10
N
D
P
_
N
E
S
_
2
RXIP
RXQN 1
P
Q
X
R
28
K
L
C
S
1314
I
D
S
O
D
S
11
TXIN 5
4
TXIP
TXQN
18
RFIGN
21
RFIGP
20
RFIPN
17
16 RFIPP
D
O
F
R
22
G
O
F
R
23
3
RXIN
29 30
D
N
G
31
D
N
G
33
D
N
G
34
D
N
G
GND 35
GND 36
19 RFIDN
RFIDP
U404
1
G
A
I
D
24
2
G
A
I
D
25
15 GND
D
N
G
C431
VRF
GSM_LNA_IN_N
DCS_LNA_IN_P
DCS_LNA_IN_N
DPCS_PAM_IN
SERLE
SI_EN
13MHZ_SI
CLK13M_RF
XOENA
SERDAT
SERCLK
RXTXQP
RXTXQN
RXTXIP
RXTXIN
GSM_LNA_IN_P
GSM_PAM_IN
R423
C442 R424
C449
R422
VRF
C443
1
T
V
OSC401
2
GND
3
OUT
VCC 4
AFC
CLK13M_RF

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SGH-X140 Flow Chart of Troubleshooting
2-4
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2-1-2. Initial
Initial Failure
The pin #G11 of U101 =
1.8V and
the pin #J12 of U101 =
2.8V ?
Check the U101
(if it has some problem, it is to be replaced.)
Yes
No
Is the pin #K9 of U101
"Low →High" ?
Yes
No Check the U101
(if it has some problem, it is to be replaced.)
There is 32.768kHz wave
forms at the C220 and
C221
Yes
No
Check the U201
Is the pin #A4 of U101
is "High"
The voltage is "High" at
the C112,C115,C116 Check the U101
Check the U404
LCD display is O.K
No
No
Yes
Yes
Yes
Check the LCD part
No
Sound is O.K
Yes
No
Check the Audio part
END
Yes

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SGH-X140 Flow Chart of Troubleshooting
2-5
This Document can not be used without Samsung's authorization
PA13/TX1
CP_KB[7]/TR_SIZE1
CP_KB[8]/TR_NEXEC
PA28/IOM0
PA25/OM0
IOBIT[2]/VEC[3]/EROMHI
PN17/DRQ
PA20/CP_MI
FLASH_RESET
PA29/IOM1
PA33/T_REQA
PA31/IM1
IOBIT[1]/VEC[4]/PLLTOA
CP_KB[3]/TR_CS_IPCP
PA19/CP_MO
CP_KB[4]/TR_SIZE
0
CP_KB[6]/TR_PROT0
PA27/SM1_CLK
CP_KB[5]/TR_CL
K
CP_KB[0]/TR_CS_IRAM
PA18/T_ACK
PA26/OM1
CKO/IACK/ERAMHI
PA34/T_REQB
SIM_DATA/SM0_DAT
A
CP_KB[9]/TR_GNT_DM
A
CP_KB[1]/TR_CS_IROM
CP_KB[2]/TR_CS_PERF
PA30/IM0
PA14/RX1
SIM_CLK/SM0_CLK
PA22/SM1_DATA
R207
VO VS 1
U203
GND
3
2
R206
TP203
VCCB
TP201
VRTC
TP209
VCC_1.8A
TP204
TP205
TP202
21
OSC201
TP213
R220
R212
R211
R208
VCC_1.8A
R215
TP211
C230
TP210
N10
U12
XTIC_MODE D12
F10
XVREF
XPA4/OEN
P16
P15 XPA5/WAITN
T15 XPA6/BE1N
XPA7/IRQ1
M9
T5 XPA8/IRQ2
XPA9/IRQ3
P2
XPWM1
R5
XRTCALARM_N E8
M11
F3
E1
H14
XPA32_CS0N
N17
M17
XPA35_A22L13
N15
XPA36_A23_CS5
N
XPA3/CS4N
N14
J6
H6XPA23/PWM
2
XPA24/PWM
3
H5
M3
G2
G4
G5
F1
XPA2/CS3N
H4
L3XPA16/RX0
E4
P13
L2
M14 XPA1/CS2N
L1
K4XPA21/CP_SCK
XOSC32OUT C6
XPA0/CS1N
M15
N2 XPA10/IRQ4
XPA11/IRDARX
K5
XPA12/IRDAT
X
N1
G6
G3
XPA15/TX0
T4
N3
D7XCP_TCK
XCP_TDO
D13
XCP_TMS
G8
F9XCP_TRSTN
C13 XCP_WEN
F4
L4
L5
M4
T1
R2
T3
U3
P3
XCP_D3
F7
C5 XCP_D4
XCP_D5
D6
XCP_D6
E7
XCP_D7
D5
C4 XCP_D8
XCP_D9
B4
XCP_TDI
C7
A6
XCP_D1
B5
XCP_D10
B3
C1 XCP_D11
XCP_D12
C2
XCP_D13
D2
D3 XCP_D14
XCP_D15
E3
F8 XCP_D2
XCP_A5
C14
A16 XCP_A6
XCP_A7
A15
XCP_A8
B17
XCP_A9
C17
A13 XCP_CSRAMEN
XCP_CSROMEN
A12
XCP_D0
XCP_A17
K13
K14 XCP_A18
XCP_A19
L14
XCP_A2
E14
XCP_A20
L15
L16 XCP_A21
D15 XCP_A3
B15 XCP_A4
XCP_A1
F11
D16 XCP_A10
XCP_A11
F14
XCP_A12
G14
XCP_A13
G13
XCP_A14
G17
J12 XCP_A15
K12 XCP_A16
X1RTC
X2RTC D10
B11
XAG0
XAG1 A11
XAG2 E11
XAG3 D11
XBSWN B7
XCPTSTSTOP_CKO M12
B13 XCP_A0_BEON
G9
VSSG10
VSSH7
VSSH11
J7
VSS
VSSK6
E10
VSSA
E15
VSS_DPLL
A7
L6
VSSL10
VSSM7
L8
VSS
J11
VSS
VSSL9
A3
VSS
F6
VSS
VSS
U16
VDDEN16
VDDEE16
E17
VDDE
VDD_DPLLG16
VRTCD8
VSSA2
VSSK7
VSS
C16
VDDAC11
B1
VDDE
VDDEB14
VDDEM1
VDDEU2
VDDEP8
U15
VDDE
VDDE
VDDG1
VDDR1
R4
VDD
VDDT13
VDDR16
VDDR17
A5
VDD
VDD
C12
RWN U5
TCK H13
TDI H12
F12
TDO
TMS G12
TRST F15
VDDE2
L17
VDD
DB#8
DB#9 N7
INT#0 N4
R12
IO7
K11
L12
NC1
2
NC
RSTB
DB#14
DB#15 P10
DB#2 R6
DB#3 P6
U7
DB#4
T7
DB#5
DB#6 R7
M6
DB#7
P7
G15
DB#0 P5
U6
DB#1
DB#10 N8
M8
DB#11
DB#12 U11
T11
DB#13
R11
R13
AB#2
N11
AB#3
P11
AB#4
P12
AB#5
AB#6 R14
AB#7 T14
T17
AB#8
F17
CKI
U201
U13
AB#0
AB#1 M10
R205
C220
C211
VCCB
VBAT
C215
C214
VCCD
R203
C221 C222
VCC_1.8A
R217
VCCD
C216
TP206
C231
XLATCH_CS
JACK_IN
EAR_SWITCH
F_WP_
KEY_LED_EN
CP_TDO
CP_TDI
CP_TMS
CP_TCK
DSP_TDO
CP_CSROM2EN
YMU_LED
A(22)
BACKLIGHT_EN
CHG_DET
DSP_TCK
DSP_TDI
ICHRG
I2C_DATA
DLC_DETECT
DSP_TMS
LCD_CS
A(21)
DEBUG_DTR
DEBUG_RTS
DSP_AB(8:0)
UP_SDI
UP_SDO
TR_RST
DSP_AB(8)
KEY_ROW(4)
TR_RST
UP_SCLK
UP_CS
FLASH_RESET
VREF
DEBUG_DSR
TR_RST
DSP_DB(15:0)
D(0:15)
A(0:20)
KEY_ROW(0:4)
KEY_ROW(3)
KEY_ROW(2)
KEY_ROW(1)
KEY_ROW(0)
KEY_COL(0:4)
KEY_COL(4)
KEY_COL(3)
KEY_COL(2)
KEY_COL(1)
KEY_COL(0)
SIMDATA
SIMCLK
I2C_CLK
DEBUG_RI
DSP_IO
DSP_RWN
DSP_INT
TR_RST
CLK13M_TR
CLK32K
RTCALARM
BP_VF
CP_CSROMEN
CP_CSRAMEN
CP_WEN
CP_OEN
DEBUG_DCD
UPPER_BYTE
YMU_IRQ
SIMRST
PWR_KEEP
DEBUG_TXD
DEBUG_CTS
SDS_TXD
INTRQ
DEBUG_RXD
SDS_RXD
DSP_DB(1)
DSP_DB(10)
DSP_DB(11)
DSP_DB(12)
DSP_DB(13)
DSP_DB(14)
DSP_DB(15)
DSP_DB(2)
DSP_DB(3)
DSP_DB(4)
DSP_DB(5)
DSP_DB(6)
DSP_DB(7)
DSP_DB(8)
DSP_DB(9)
YMU_EN
D(1)
D(10)
D(11)
D(12)
D(13)
D(14)
D(15)
D(2)
D(3)
D(4)
D(5)
D(6)
D(7)
D(8)
D(9)
DSP_DB(0)
A(14)
A(15)
A(16)
A(17)
A(18)
A(19)
A(2)
A(20)
A(3)
A(4)
A(5)
A(6)
A(7)
A(8)
A(9)
D(0)
DSP_AB(0)
DSP_AB(1)
DSP_AB(2)
DSP_AB(3)
DSP_AB(4)
DSP_AB(5)
DSP_AB(6)
DSP_AB(7)
A(0)
A(1)
A(10)
A(11)
A(12)
A(13)

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SGH-X140 Flow Chart of Troubleshooting
2-6
This Document can not be used without Samsung's authorization
2-1-3. Sim Part
Check the voltage at
pin#1 of CN101 >=
2.8V ?
"Insert SIM is displayed on the LCD
Check the SIM
connector's (CN101)
connection to SIM card
Check the U101
Resolder or change CN101
END
No
Yes
Yes
Yes
Yes
No
No
Is there any signals
pin#2,#3,#6 of CN101 ? Check the U201
Check the SIM Card

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SGH-X140 Flow Chart of Troubleshooting
2-7
This Document can not be used without Samsung's authorization
2-1-4. Microphone Part
Is the assembled status
of microphone O.K?
Microphone does not work
Reassembled the microphone
Resolder or change
R511,R510,R512,C515,C512,R516,
R517,R508,R515,R520,R520,C525
END
No
Yes
Yes
Yes
Yes
No
Is microphone ok?
No
Check U101
Check the reference voltage on mic path
ZD632 ≒2.0V ?
Yes

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SGH-X140 Flow Chart of Troubleshooting
2-8
This Document can not be used without Samsung's authorization
2-1-5. Speaker Part
There is no sound from the Speaker
Is the terminal of Speaker
O.K ?
No
Replace the Speaker
Yes
Are there any signals at
the R518,R519
No
Yes
Check U501
Thetypeofsound
from the Speaker is
Melody
Is there any signals
at the pin#5 and
pin#7 of U501 ?
Is there any signals
at the pin#2 and
pin#10 of U501 ?
Yes No
The pin#4 of
U501 is "Low"
The pin#4 of
U501 is "High"
Check the
U502
Check the
U502
Yes Yes
NoNo
Check the U201
Check the U501
Yes Yes
No No
END

SAMSUNG Proprietary-Contents may change without notice
SGH-X140 Flow Chart of Troubleshooting
2-9
This Document can not be used without Samsung's authorization
R511
TSR/
/WR
28
705R
16
SPVSS
DDV
7
FERV
9
8
SSV
29/CS
QRI/
3
31/RD
4
32IOVDD
2
DEL
RTM
19
CN
56
CLLP
1TUOPS
17
18
2TUOPS
SPVDD15
EQ1
EQ213
14
EQ3
33G
G
3435
G
G36
10
HPOUT-L/MONO
HPOUT-R11
D0
D1
26
2D
2524
3D
4D
2322
5D
21
6D
20
7D
12
U502
A0
30
IKLC
1
27
ZD503
VCCD_2.7
R512
L503
VCCA_2.7
C510
VBAT_4.2
R505
V+
2
L505
5
COM
GND
3
1IN
NC4
6
NO
R528
U504
2GND
1IN5
OUT
4
REF_BYP
U503
EN
3
C532
VCCD_2.7
R503
C519
C535
R521
C534
R520
R514
ZD502
3
1
C515
Q501
2
V+
C513
14
GND
6
4
IN1
8IN2
5
NC1
7NC2
2
NO1
10NO21
U501
COM13
COM2
9
11
G
G
12
13
G
G
905R
R502
R518
R513
635C
735C
L501
405DZ
C505
TP501
C529
105DZ
C506
C509
R519
L502
TP502
145C
C542
R522
C528
L504
C512
C502
C501
R523
R506
R504
VBAT_4.2
C511
R530
625C
MIC501
TP504
VCCD_2.7
R510
VCCA_2.7
045C
C517
NC
VCCD_2.7
136DZ
C507C508
22NF
C543
R517
C503
C521
R515
TP503
ZD632
VBAT_4.2
R516
C504
C518
135R
1
2
3
4
5
6
R501
CN501
C533
R508
C530
C522
C523
C514
R529
835C
VCCA_2.7
R524
C531
C525
C524
AOUTBP
AOUTBN
JACK_IN
RADIO_ANT
MIC+
SPK-
MICOUTN
AUDIO_OUT_SEL
RADIO_SPK
RADIO_SHUTDOWN
MICOUTP
MICINP
MICINN
AOUTAN
AOUTAP
SPK+
YMU_LED
MELODY_VIB
MOT+
AUXOUTP
AUXINP
EAR_SWITCH
YMU_EN
YMU_IRQ
CP_OEN
RST
CP_WEN
MELODY_VIB
MSPK-
MSPK+
A(0)
CLK13M_YMU
D(0)
D(1)
)2(D
)3(D
)4(D
)5(D
)6(D
)7(D
MSPK+
MSPK-

SAMSUNG Proprietary-Contents may change without notice
SGH-X140 Flow Chart of Troubleshooting
2-10
This Document can not be used without Samsung's authorization
U402 CHECK
pin8 ≥-65dBm ?
2-2.RF
2-2-1. EGSM RX
CONTINUOUS RX ON
RF INPUT : 62CH
AMP : -50dBm
NORMAL CONDITION
catch the channel?
CHECK
ANT2,R401 contact ?
U404
pin 9,32: 2.8V ?
U402 CHECK
pin2,3 ≥-65dBm ?
U404 CHECK
pin20,21 ≥-65dBm ?
C402,U401
resolder or change
U402
resolder or change
C408,C409,L401
resolder or change
U101 pinA13, C111
change or resolder
U404 CHECK
pin 8 : 13MHz ?
Vp-p : 950mV?
OSC401
change or resolder
U404
resolder or change
U101 CHECK!!
U404
pin1,2,3,28 Vp-p
: 120mV ?
NO
YES
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES

SAMSUNG Proprietary-Contents may change without notice
SGH-X140 Flow Chart of Troubleshooting
2-11
This Document can not be used without Samsung's authorization
U402 CHECK
pin8 ≥-65dBm ?
2-2-2. DCS RX
CONTINUOUS RX ON
RF INPUT : 698CH
AMP : -50dBm
NORMAL CONDITION
catch the channel?
CHECK
ANT2,R401contact ?
U404
pin 9, 32: 2.8V ?
U402 CHECK
pin4,5 ≥-65dBm ?
U404 CHECK
pin18, 19 ≥-65dBm ?
C402,U401
resolder or change
U402
resolder or change
C411,C413,L403
resolder or change
U101 pinA13, C111
change or resolder
U404 CHECK
pin 8 : 13MHz ?
Vp-p : 950mV?
OSC401
change or resolder
U404
resolder or change
U101 CHECK!!
U404
pin1,2,3,28 Vp-p
NO
YES
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES

SAMSUNG Proprietary-Contents may change without notice
SGH-X140 Flow Chart of Troubleshooting
2-12
This Document can not be used without Samsung's authorization
2-2-3. EGSM TX
U402 pin 13 :
about 2~3
dBm?
C407,U401
check&change
U402
pin1 : 2.8 V?
U101
check & change
U403 pin14 :
about 4~5dBm?
U402
check & change
U403
pin5 : 3.7 V?
NO NO
YES
YES
YES
NO
NO BATTERY
check & change
U403
pin 4 : 1.6V ?
YES
NO
U403 pin1
about : -5dBm
?
YES
U403
pin 6 : 3V?
YES
YES
U403
change or resolder
NO
U101
check
U101
check
NO
U404
pin9,32 : 2.8V ?
U101 pinA13,C111
change or resolder
YES
U404
pin8 : 13MHz ?
Vp-p : 950mV?
U404
pin4,5,6,7:100m
V?
YES
U101
change or resolder
NO
NO
U404
change or resolder
YES
NO OSC401
change or resolder
CONTINOUS TX ON CONDITION
TX POWER DAC: 600 CODE APPLIED
CH : 62
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB

SAMSUNG Proprietary-Contents may change without notice
SGH-X140 Flow Chart of Troubleshooting
2-13
This Document can not be used without Samsung's authorization
2-2-4. DCS TX
U402 pin 11 :
about 2~3
dBm?
C407,CN401
check&change
U402
pin9 : 2.8 V? U101
check & change
U403 pin10 :
about 4~5dBm?
U402
check & change
U403
pin5 : 3.7 V?
NO NO
YES
YES
YES
NO
NO BATTERY
check & change
U403
pin 4 : 1.4V ?
YES
NO
U403 pin9
about : -5dBm ?
YES
U403
pin 6 : 3V?
YES
YES
U403
change or resolder
NO
U101
check
U701
check
NO
U404
pin9,32 : 2.8V ?
U101 pinA13,C111
change or resolder
YES
U404
pin8 : 13MHz ?
Vp-p : 950mV?
U404
pin4,5,6,7:100m
V?
YES
U101
change or resolder
NO
NO
U404
change or resolder
YES
NO OSC401
change or resolder
CONTINUOUS TX ON CONDITION
CH : 698CH(DCS)
TX POWER CODE: 520 CODE Aplied
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB

SAMSUNG Proprietary-Contents may change without notice
SGH-X140 Flow Chart of Troubleshooting
2-14
This Document can not be used without Samsung's authorization
C437
TX_EN
VBATT
5
CCV
12
VRAMP
4
C419
DNG
811
DNG
DNG
1315
DNG
DNG
1617
DNG
GSM850/900IN
1
GSM850/900OUT14
6
U403
BS7
DCS/PCSIN
9
DCS/PCSOUT10
DNG
23
DNG
C411
C438
C451
G
5
6G
C433
U401
A
2
3C
1G
4G
C407
ANT2
R401
C406
C417
C408
C409
C439
C401
C404
L401
C435
GSM-TX
1VC1
VC2
6
R423
7
G
9
GG
1012
G
14
G
2
GSM-RX
GSM-RX3
13
U402
ANT
8
4
DCS-RX
DCS-RX5
DCS-TX
11
C413
C442
C418
L402
C412
054C
L404
C430
R424
C434
R420
C449
C429
C410
R422
C441
VBAT
C436
VRF
C443
1
TV
L405
OSC401
2
GND
3
OUT
VCC4
C402
12
R402
7
TXQP6
DDV
9
DDV
32
26
NEX
NIX
8
TUOX
27
10
NDP_
NES_
2
RXIP
RXQN1
PQXR
28
KLCS
13
14
IDS
ODS
11
TXIN5
4
TXIP
TXQN
18
RFIGN
21
RFIGP
20
RFIPN
17
16RFIPP
DOFR
22
GOFR
23
3
RXIN
2930
DNG
31
DNG
33
DNG
34
DNG
GND35
GND36
19RFIDN
RFIDP
U404
1GAID
24
2GAID
25
15GND
DNG
C440
C431
VRF
L403
R403
GSM_LNA_IN_N
DCS_LNA_IN_P
DCS_LNA_IN_N
DCS_TX_EN
GSM_TX_OUT
GSM_TX_OUT
ANT
DPCS_PAM_IN
SERLE
SI_EN
13MHZ_SI
CLK13M_RF
XOENA
SERDAT
SERCLK
RXTXQP
RXTXQN
RXTXIP
RXTXIN
GSM_LNA_IN_P
TX_BAND_SEL
AFC
CLK13M_RF
CLK13M_MC
CLK13M_TR
13MHZ_SI
CLK13M_YMU
GSM_PAM_IN
DCS_TX_OUT
DCS_LNA_IN_P
DCS_LNA_IN_N
GSM_LNA_IN_N
GSM_LNA_IN_P
GSM_TX_EN
DCS_TX_OUT
TXPOWER
TX_EN
GSM_PAM_IN
DPCS_PAM_IN

SAMSUNG Proprietary-Contents may change without notice
3. SGH-X140 Exploded View and Parts List
3-1
This Document can not be used without Samsung's authorization
3-1. Cellular phone Exploded View
QBA01
QKP01
QAN02
QMW02
QLC01
QSP01
QMO01
QRE01
QME01
QIF01
QMI05
QMP01
QFR01
QCR04
QRF03
QSP05
QRF01
QSC01

SAMSUNG Proprietary-Contents may change without notice
SGH-X140 Exploded View and Parts List
3-2
This Document can not be used without Samsung's authorization
3-2. Cellular phone Parts list
Location
NO. Description SEC CODE Remark
QMW02 LCD WINDOW GH72-18145A
QFR01 FRONT COVER GH75-05839A
QSP05 SPK DECO GH75-05827A
QMO01 MOTOR DC GH31-00137A
QSP01 SPEAKER 3001-001677
QLC01 LCD GH07-00555A
QMP01 MAIN PBA GH92-01984A
QAN02 INTENNA GH42-00520A
QRE01 REAR COVER GH75-05840A
QRF03 EARJACK COVER GH72-18144A
QCR04 SCREW MACHINE 6001-001479
QRF01 RF SHEET GH74-13093A
QSC01 SCREW COVER GH72-20329A
QMI05 MIC HOLDER GH73-03844A
QIF01 IF COVER GH72-18131A
QKP01 KEYPAD GH75-05879A
QME01 UNIT METAL DOME GH59-01935A
QBA01 BATTERY GH43-01665A