Samsung SGH-S341i User manual

SGH-S341i
SERVICE
Manual
GSM TELEPHONE CONTENTS
1. Specification
2. Flow Chart of Troubleshooting
3. Exploded Views and Parts List
4. Electrical Parts List
5. Block Diagrams
6. PCB Diagrams
GSM TELEPHONE

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1. SGH-S341i Specification
1-1
This Document can not be used without Samsung's authorization
1. GSM General Specification
GSM900
Phase 1 EGSM 900 Phase 2 DCS1800 Phase 1 PCS1900
Freq. Band[MHz]
Uplink/Downlink 890~915 935~960 880~915 925~960 1710~1785 1805~1880 1850~1910 1930~1990
ARFCN range 1~124 0~124 &
975~1023 512~885 512~810
Tx/Rx spacing 45MHz 45MHz 95MHz 80MHz
Mod. Bit rate/
Bit Period 270.833kbps 3.692us 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 576.9us 4.615ms
Modulation 0.3GMSK 0.3GMSK 0.3GMSK 0.3GMSK
MS Power 33dBm~13dBm 33dBm~5dBm 30dBm~0dBm 30dBm~0dBm
Power Class 5pcl ~ 15pcl 5pcl ~ 19pcl 0pcl ~ 15pcl 0pcl ~ 15pcl
Sensitivity -102dBm -102dBm -100dBm -100dBm
TDMA Mux 8 8 8 8
Cell Radius 35Km 35Km 2Km -

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SGH-S341i Specification
1-2
This Document can not be used without Samsung's authorization
2. GSM TX power class
TX Power
control level GSM900
5 33±2dBm
6 31±2dBm
7 29±2dBm
8 27±2dBm
9 25±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
0 30±3dBm
1 28±3dBm
2 26±3dBm
3 24±3dBm
4 22±3dBm
5 20±3dBm
6 18±3dBm
7 16±3dBm
8 14±3dBm
9 12±4dBm
10 10±4dBm
11 8±4dBm
12 6±4dBm
13 4±4dBm
14 2±5dBm
15 0±5dBm
TX Power
control level PCS1900
0 30±3dBm
1 28±3dBm
2 26±3dBm
3 24±3dBm
4 22±3dBm
5 20±3dBm
6 18±3dBm
7 16±3dBm
8 14±3dBm
9 12±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-S341i Flow Chart of Troubleshooting
2-1
This Document can not be used without Samsung's authorization
1.Baseband
1. Power ON
'Power On' does not work
Voltage >=3.3V
Download again
Charge the Battery
Pin#J12 >= 2.8V Check U102 and C128
Pin#A13 and pin#14
=2.8V Check U102 and C129
Freq = 13MHz
Vrms >=300mV
Vpp≒ 900mV
Check the clock generation circuit
(related to osc501)
Check the initial operation
END
No
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
pin#G11 =
1.5V
=1.8V
No
Yes
Check the current consumption
Check the Vbat Voltage
Check the pin of U102
Check the clock signal at pin#27 of U501
Current consumption
>= 100mA

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SGH-S341i Flow Chart of Troubleshooting
2-2
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2. Initial
Initial Failure
The pin #G11 of U102 =
1.5V and
the pin #J12 of U102 =
2.825V ?
Check the U102
(if it has some problem, it is to be replaced.)
Yes
No
Is the pin #K9 of U102
"Low → High" ?
Yes
No Check the U102
(if it has some problem, it is to be replaced.)
There is 32.768kHz
wave forms at the C218
and C219
Yes
No
Check the U202
Is the pin #A4 of U102
is "High"
The voltage is "High" at
the C122,C123,C127 Check the U102
Check the U501
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-S341i Flow Chart of Troubleshooting
2-3
This Document can not be used without Samsung's authorization
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 U102
Resolder or change CN101
END
No
Yes
Yes
Yes
Yes
No
No
Is there any signals
pin#2,#3,#4 of CN101 ? Check the U202
Check the SIM Card

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SGH-S341i Flow Chart of Troubleshooting
2-4
This Document can not be used without Samsung's authorization
GEMINI+
C134
100NF
TP107
TP111M101
NE
G2PO
S
1
0
R104
VCCD_1_8
VCCB
2VOVS1
U103
GND
3
NC
R163
0
R102NC
R134
0
VCCD
R101
VCCB
C114
10NF
33PF
C104
R17010
C128
1UF
R1370
100
R120
10NF
C158
VRTC
C112
100NF
C124
1UFC123
1UF
0
R139
C108
TP105
33PF
100NF
C133
VCCD
VRF
C129
1UF
C127
R125
10K,1%
1UF
VBAT
R114
1.2K
2.2UF
C107
TP110
VCCD_1_5
VRF
C126
1UF
C103
10NF
VCCD_1_8
R103
NC
VBAT
VBAT
0
R140
VCCA
VCCA
R144
NC
NC
C102100NF
C105
C122
1UF
TP106
C101
100NF
100NF
C155
TP108
G
7
8
G
G
9
10
G
CN101
1
1
223
344
55
66
VCCD
NC
C156
100PF
C130
0
R138
1UF
C111
R14VREGN
M13VREGP
H11
VRTCK12
VSIM
G5
VSS1K4
VSS2R2
VSS3P6
VSS4
R13VXVCM
D1XOENAQ
B11
VL4S_B
D10
VL5S_A
VL5S_BC9
G11
VLDO_
1J12
VLDO_
2A13
VLDO_
3B12
VLDO_
4
B10
VLDO_
5
A14
VLDO_
6C12
VLDO_
7
A10
VREF
VDD6
7
A6
VDD
BN11
VDDD
L11
VDDV
N5
VDD_IO
1J4
VDD_IO
2
C4
VDD_OCTL
E14
VEX
T
F15
VIB_DRV
L9VIB_RNG_EN
A12
VL4S_A
P10
UP_IOR10
UP_RST
F14
VAC
C
E13
VBA
T
J3
VDD1
J13
VDD1
2
M3
VDD2N6
VDD3
C11
VDD3
4
C10
VDD5B13
SDI_PSC
M7
N7
SDO_PSC
C2SERCK
SERDA
C1
SERLE1
B1
A2SERLE2
K14
SIM_CLK
J11
SIM_IOK11
SIM_RST
E7TXP
N9
UP_CLK
R3
K9RESET_O
F13
RING_DRV
H10
RTC_ALM
N
N4RTC_CLK
L2RWN
D6RXTXIN
D7RXTXIP
C6RXTXQN
C7RXTXQP
L8
SCLK_PSC
A4OCTL4
OCTL5
G6
B3OCTL6
OCTL7
A3
L7PSW1_BUF
M9PWR_KEEP
C15PWR_SW1N
C14PWR_SW
2
B6RAREF1
B5RAREF2
RESETN_CSP
N14MICINP
P15MICOUT
N
N15MICOUT
P
N10MODE
NC51
2
NC6
P5NC7
E6OCTL0
OCTL1
C5
F5OCTL2
OCTL3
E5
F11
GND_HCU
R
B4
GND_OCTL
B15
GND_PSC1
K15
GND_PSC2
L10INTRQ
I|O
L3
G13
LED1_DRV
G12
LED2_DRV
R6MC
M14MICINN
J10
GNDS16K10
GNDS17
F8
GNDS
2F9
GNDS
3F10
GNDS
4G7
GNDS
5G8
GNDS
6G9
GNDS
7G10
GNDS
8H6
GNDS
9
P13
GND
V
DINTR
F6
GNDBM10
GNDD
E8
GNDQ
F7
GNDS
1
H7
GNDS10H8
GNDS11
GNDS12H9
J7
GNDS13J8
GNDS14J9
GNDS15
D3DB14
D2DB15
K3DB2
DB3
J5
J6DB4
H5DB5
G3DB6
G4DB7
F4DB8
F1DB9
P3
CSN_PSC
K8
R4DAIC
K
L6DAIDI
M6DAIDO
P4DAIR
N
K1DB0
DB1
K2
F2DB10
F3DB11
E2DB12
E3DB13
AOUTBN
R12AOUTBP
L14AUXINN
M15AUXINP
L13AUXOUT
N
K13AUXOUT
P
AUX_ADC3D13
E11
CH_BDRV
F12
CH_ISEN
D14
CH_RES
CREFE9
N1
N2AB4
AB5
M2
M1AB6
AB7
K7
K5AB8
E10
ADC_AUX1D15
ADC_AUX2
D9AFC
N12AOUTAN
P11AOUTAP
P12
VCCB
U102
K6AB0
AB1
P1
L5AB2
AB3
VBAT
VPAC
C132
100NF
33PF
C113
R128
1M
C135
1UF
RST
SVC_BLUE
FLASH_RESET
SVC_GREEN
DSP_AB(0)
PCS_RX_EN
SERLE
PWR_KEEP
PAC_EN
RF_EN
DSP_IO
DSP_RW
N
TX_BAND_SEL
SVC_RED
PSW1_BUF
KEY_BL2
KEY_BL1
BP_VF
XOENAQ_OUT
SIMCL
K
SIMDATA
GSM_TX_EN
DCS_TX_EN
JIG_ON
RTCALARM
CLK32K
UP_SCLK
UP_SDI
UP_SDO
VAPC
AUXINN
AUXINP
AUXOUTN
AUXOUT
P
UP_CS
DSP_INT
INTRQ
CLK13M_MC
MICINN
MICINP
MICOUTN
MICOUTP
PWR_ON
XOENAQ
SIMRST
AFC
AOUTAN
AOUTAP
AOUTBN
AOUTBP
DSP_AB(4)
DSP_AB(3)
DSP_AB(2)
DSP_AB(1)
SERDAT
SERCLK
RTXIP
RTXIN
RTXQP
RTXQN
DSP_DB(5)
DSP_DB(4)
DSP_DB(3)
DSP_DB(2)
DSP_DB(1)
DSP_DB(0)
DSP_AB(0:8)
DSP_AB(8)
DSP_AB(7)
DSP_AB(6)
DSP_AB(5)
DSP_DB(15)
DSP_DB(0:15)
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)

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SGH-S341i Flow Chart of Troubleshooting
2-5
This Document can not be used without Samsung's authorization
TRIDENT-HP
R217
VCCD_1_5
0
22NF
C201
22PF
C219
VCCD_1_8
TP211
0
R216
C209
10NF
10NF
C208
VCCD_1_8
TP210
VRTC
10NF
C214
OSC201
23
4
1
47K
R209
R207
C218
10KR208
10K
22PF
F19
G8
VSS3G9
VSS4H8
VSS5
VSS6H9
VSS7H10
VSS8H11
H12
VSS9
R11
VSSA_D
F18
VSSA_U
H1
9X1RTC
X2RTC
VSS1
VSS10J12
K8
VSS11
VSS12L7
L8
VSS13
VSS14M8
M9
VSS15
VSS16M10
M11
VSS17
VSS18M1
2
VSS2A18
VDD_IO_1P8_17
VDD_IO_1P8_18W1
8
B6
VDD_IO_1P8_2B12
VDD_IO_1P8_3
VDD_IO_1P8_4B16
C1
VDD_IO_1P8_5
VDD_IO_1P8_6C14
VDD_IO_1P8_7D9
VDD_IO_1P8_8D1
8
F1
VDD_IO_1P8_9
VRTCG1
8
A2
V7
VDD_CORE7
V13
VDD_CORE8
B4
VDD_IO_1P8_1
VDD_IO_1P8_10L4
VDD_IO_1P8_11L16
VDD_IO_1P8_12P1
T18
VDD_IO_1P8_13
VDD_IO_1P8_14U1
U5
VDD_IO_1P8_15
VDD_IO_1P8_16U12
W8
R12
M3TX0
TX1
K7
VDDA_
DT11
VDDA_
UF17
B8
VDD_CORE1
VDD_CORE2
B13
G2
VDD_CORE3
VDD_CORE4
H18
M2
VDD_CORE5
VDD_CORE6
N1
8
SPRXD0
M1
7
SPRXD1_PIO17
SPTXD0_I2SD
U2
SPTXD1_I2SD_PIO16
N16
U1
4
TCKV14
TD
IT12
TDO
U1
5
TEST1
TEST2T14
V16
TEST3
W1
4
TM
S
TRSTN
RTS0_PIO0
4
N2
V6
RWN
RX0_IRQ28
M1
RX1_IRQ28
L6
P4SIMCLK
SIMI
O
T2
SPCLK0
R3
SPCLK1_PIO18
M18
SPFS0
T3
N15
SPFS1_PIO15
R4
J15
PIO39_MCI_CMD_EN
L14
M14 PIO40_MCI_DAT_EN
PIO41_IRDATX
R16
R17PIO42_IRDAR
X
PIO43_MCI_DAT0_EN
N14
PIO47J16
PWM1_PIO46
G5G1
5
RESTN
P3RIO_PIO01
H1
7RTCALARMN
PIO26
U1
9PIO27
W1
7PIO28
PIO30_WAITN
E14
PIO31_IRQ6P12
R13PIO3
2
PIO33U1
8
R14
PIO34
F2PIO35_A_A25_BOOTSEL
F16PIO36_USB_OEN
E17PIO37_USB_DAT
A
PIO38_MCI_CLK
PIO12_USB_VPO
D1
7PIO13_USB_VMO
E16
PIO14_SIMRST
P5
PIO19_PWRKEEP
P15
P19PIO20_SYSCLKREQ
PIO21_MCI_DAT0
K13
L12PIO22_MCI_DAT1
PIO23_MCI_DAT2
L13PIO24_MCI_DAT3
L15
PIO25
V19
U1
6
H3
G6KEYBRD9
NC
11
2
NC
2
OSC32OUT
G1
6
P16
PIO00_IRQ5
B19PIO07_USB_SUSP
J13PIO08_MCI_CMD
PIO09_USB_VPI
C19
V17PIO10
C18PIO11_USB_VM
I
P18
KEYBRD0
J7
J6KEYBRD1
G4KEYBRD10
H2KEYBRD11_PSW1_BUF
J5KEYBRD2
J4KEYBRD3
KEYBRD4
J8
H6KEYBRD5
KEYBRD6
H4
H1KEYBRD7
KEYBRD8
D_D8T9
R9
D_D9
H14FLASHRSTN
INT0T15
W6
IO
IOBIT0_PIO05V12
IOBIT1_PIO06N11
M16
IRQ1
IRQ2M19
P17
IRQ3
IRQ4
D_D11
D_D12N8
N9
D_D13N10
D_D14P11
D_D15
D_D2R7
T7
D_D3
D_D4R8
D_D5V8
D_D6U8
T8
D_D7
D_A
1
D_A
2W3
V3
D_A
3U4
D_A
4T5
D_A
5
D_A
6V4
N6
D_A
7
D_A
8R6
U6
D_D0T6
D_D1
D_D10P8
P9
B14A_OEN
A_WEN
D14
CK
IW1
2
CKO_IACKN12
CPTSTSTOP_CK
OT17
M6CTS0_PIO29
DCD0_PIO4
4
N5
DSR0_PIO02
P2
N4DTR0_PIO03
D_A
0V1
W2
A_D13
A_D14
E13
D13A_D15
F9A_D2
G1
0A_D3
A_D4
G1
1
F11A_D5
A_D6
E11
G1
2A_D7
D11A_D8
E12A_D9
G1
4
J14A_CS3N
A_CS4N
D15A_CS5N
C16A_CS6N
F15
B17A_CS7N
A_D0
A8
E9A_D1
A_D10
C12
A12A_D11
A_D12
F12
D12
A_A4
C6
C5A_A5
A_A6
D7
E7A_A7
A_A8
C4
C2A_A9
A_BE0N
H16
A17A_BE1N
A_CS0N
A14A_CS1N
C15A_CS2N
E8
F8A_A17
E6A_A18
A_A19
D2
D8A_A2
A_A20
E4
E3A_A21
A_A22
F5
F4A_A23
F3A_A24
A6A_A3
ATDI_RTS1
ATDO_PWM2T13
K12
ATMS_PIO45
B7A_A0
C8A_A1
A_A10
A3
B3A_A11
A_A12
B1
D6A_A13
A_A14
D5
D3A_A15
A_A16
U202
M4
ATCK_CTS1L5
TP214
100NF
C206
VCCD_1_8
TP205
R2140
VCCD_1_8
TP204
R204
NC
100NF
C202
TP21
3
TP206
C203
100NF100N
F
C207R201
TP201
10
R206
10K
VCCD_1_5
10NF
C205
C204
10NF
A(0)
A(0:24)
PMODE
A(24)
A(25)
CP_OEN
KEY_ROW(0:5)
KEY_ROW(5)
KEY_ROW(4)
KEY_ROW(3)
KEY_ROW(2)
KEY_ROW(1)
KEY_ROW(0)
A(23)
UP_SDI
DEBUG_DTR
DEBUG_RTS
IRDA_RX
SDS_RXD
DEBUG_RXD
D(12)
D(13)
D(14)
D(15)
D(0:15)
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)
A(21)
A(22)
DSP_DB(1)
DSP_DB(2)
DSP_DB(3)
DSP_DB(4)
DSP_DB(5)
DSP_DB(6)
DSP_DB(7)
DSP_DB(8)
DSP_DB(9)
DSP_DB(10)
DSP_DB(11)
DSP_DB(12)
DSP_DB(13)
DSP_DB(14)
DSP_DB(15)DSP_DB(0:15)
D(0)
D(1)
D(2)
D(3)
D(4)
D(5)
D(6)
D(7)
D(8)
D(9)
D(10)
D(11)
KEY_COL(0)
KEY_COL(1)
KEY_COL(2)
KEY_COL(3)
KEY_COL(4)
KEY_COL(0:4)
DSP_AB(0)
DSP_AB(1)
DSP_AB(2)
DSP_AB(3)
DSP_AB(4)
DSP_AB(5)
DSP_AB(6)
DSP_AB(7)
DSP_AB(8)
DSP_AB(0:8)
DSP_DB(0)
DSP_IO
DSP_IN
T
DEBUG_DSR
DEBUG_DCD
DEBUG_CTS
CLK13M_TR
ROM4_CS
CP_TM
S
CP_TD
O
CP_TD
I
CP_TC
K
PWR_KEEP
SIMRST
USB_VMO
USB_VPO
USB_VM
I
IRDA_EN
USB_VPI
USB_SUSP
CLK32K
PSW1_BUF
FLIP_SN
S
YMU_IRQ
JACK_IN
T
DSP_RW
N
RTCALARM
DEBUG_RI
IRDA_TX
USB_DATA
USB_OEN
USB_CON
LED_DATA
DLC_DETECT
EAR_SWITCH
AUDIO_AMP_EN
USB_DET
XOENA
Q
ROM2_CS
ROM1_CS
FLASH_RESET
CP_WEN
SDS_TXD
DEBUG_TXD
DSP_TM
S
DSP_TDO
DSP_TDI
DSP_TCK
SIMDATA
SIMCLK
FLASH_RESET
RAM1_CS
RAM2_CS
LCDC_CS
YMU_CS
LOWER_BYTE
TR_RST
TR_RSTRST
INTRQ
LCDC_INT
UP_CS
UP_SD
O
UP_SCLK
UPPER_BYTE
ROM3_CS

SAMSUNG Proprietary-Contents may change without notice
SGH-S341i Flow Chart of Troubleshooting
2-6
This Document can not be used without Samsung's authorization
SI-LAB
X-TAL(13MHz)
VRF
C502VRF
47PF
C50115PF
C517
100PF
VRF
10K
R517
C507
10NF
VT
1
OSC501
2
GND
3
OUTVCC
4
C515
100PF
10N
F
C505
C508
10N
F
10
R502R501560
100
R503
33PF
C504
XI
N
8
XOUT
27
_PD
N
10
_SEN
12
SD
O
11
TXIN
5
TXIP
4
TXQ
N
7
TXQ
P
6
VD
D
9
VD
D
32
XEN
26
RFO
D
22
RFO
G
23
RXIN
3
2RXIP
RXQ
N
1
RXQ
P
28
SCLK
13
SD
I
14
37NC
NC
38
RFIDN19
RFIDP
18
RFIGN
21
RFIGP
20
RFIPN
17
RFIPP
16
GN
D15
GND
29
30
GND
GND
31
GND
33
34
GND
GN
D
35
36GN
D
U501
DIAG
1
24
DIAG
2
25
R504
100
22NF
C512
C50610NF
C516
100PF
C50330PF
SERCLK
SERLE
RTXIN
RTXQN
RTXIP
RTXQP
13MHZ_BB
XOENAQ_OUT
CLK13M_RF
RF_EN
AF
CCLK13M_RF
CLK13M_YM
U
13MHZ_BB
CLK13M_M
C
CLK13M_TR
DCS_LNA_IN_P
GSM_LNA_IN_N
GSM_LNA_IN_P
DCS_LNA_IN_N
PCS_LNA_IN_P
PCS_LNA_IN_N
GSM_PAM_IN
DPCS_PAM_IN
SERDAT

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SGH-S341i Flow Chart of Troubleshooting
2-7
This Document can not be used without Samsung's authorization
4. Microphone Part
Is the assembled status
of microphone O.K?
Microphone does not work
Reassembled the microphone
Resolder or change
R136,R146,R141,R145,C137,C139,
R157,R158,R161,R162,C152,C154
END
No
Yes
Yes
Yes
Yes
No
Is microphone ok?
No
Check U501
Check the reference voltage on mic path
C142 ≒ 2.0V ?
Yes

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SGH-S341i Flow Chart of Troubleshooting
2-8
This Document can not be used without Samsung's authorization
5. Speaker Part
Is there no sound from Speaker
Is the teminal of
Speaker O.K ?
No
Replace the Speaker
Yes
Are there any signals at
the C439,C462
No
Yes
Check LCD or Replace CN402
Thetypeofsound
from the Speaker is
Melody
Is there any signals
at the pin#5 and
pin#7ofU104?
Is there any signals
at the pin#2 and
pin#10 of U104 ?
Yes No
The pin#4 of
U104 is "Low"
The pin#4 of
U104 is "High"
Check the
U101
Check the
U101
Yes Yes
NoNo
Check the U202
Check the U104
Yes Yes
No No
END

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2-9
This Document can not be used without Samsung's authorization
ANALOG SW
YAMAHA
10R131
10R130
100NF
C109
C131
100NF
C115
4.7UF
16V
VCCD
C119
1NF
R172
0
VCCD
C106
150PF
C120
100NF
NC
R123
TP112
VBAT
22NF
10NF
C159
C110
VSS
8
/CS
29
3
/IRQ
/RD
31
/RST
4
28 /WR
5
NC
PLLC
6
17
SPOUT
1
SPOUT
2
18
15
SPVDD
SPVSS
16
7
VD
D
9
VREF
34 GG 35
36
G
HPOUT-L/MONO
10
11
HPOUT-R
IOVDD
32
LED
2
19
MT
R
23
D4
D5
22 21
D6
D7
20
EQ1 12
13
EQ2
EQ3 14
G
33
30 A0
1
CLKI
D0
27
26 D1
25
D2
D3
24
U101
C118
4.7UF
6.3V
R1113.3K VCCD_1_8
R106
82K
100NF
C117
150KR105
R107
33K
10R171
VBAT
7
5
NC1
NC2
U104
AUDIO_AMP_EN
TP113
A(0)
AOUTAP
SPK1P AOUTAN
SPK1N
YMU_SPK1N
YMU_SPK1P
D(7)
D(4)
D(3)
D(1)
D(0)
CP_WEN
CP_OEN
YMU_CS
VIB_EN
LED_DATA
YMU_SPK1P
YMU_SPK1N
YMU_IRQ
FLASH_RST
D(5)
D(6)
CLK13M_YMU
D(2)

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SGH-S341i Flow Chart of Troubleshooting
2-10
This Document can not be used without Samsung's authorization
EAR_SPK_N
EAR_SPK_P
JACK_IN
EAR_MIC_N
AUDIO
EAR_MIC_P
10K,1%
R162
R157
33K,1%100K
R165
MAIN_MIC
C140
NC
R169
2K,1
%
ZD102
C149
2K,1%
R166
R136
NC
150K
150K
R146
1UF
C152
G
1314
G
445
5
667
7
889
9
G
1112
G
CN102
1
1
1010
223
3
1U
F
C154
C148
NC
R135
NC
R158
10K,1%
C138
NC
C139
1UF
C141
NC
1UF
VCCD_1_8
C137
100PF
C146
R167
2K,1
%
C147
NC
VCCA
C145
NC
2K,1
%
R168
R141
10K,1%
VCCD_1_8
NC
C153
R145
10K,1%
33K,1%
R161
0
R153
220
R148
100P
F
C157
1
2
34
5
6
7
8
ZD101
33U
F
C142
MIC+
MIC-
EAR_SWITCH
MICOUT
P
MICINP
AOUTBP
AOUTBN
JACK_IN
T
AUXINN
MICINN
MICOUT
N
AUXOUT
P
AUXINP
AUXOUT
N

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SGH-S341i Flow Chart of Troubleshooting
2-11
This Document can not be used without Samsung's authorization
6. Camera Part
"Camera" function dose not work
Yes
Check the connect
CN402
Yes
U403 PIN 4,10 = 2.8V?
Yes
R402 = 13.8MHz
Connect the camera module
Check U403 and C405
Check C407 of U402
No
No
No
END

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SGH-S341i Flow Chart of Troubleshooting
2-12
This Document can not be used without Samsung's authorization
CAMPOWE
R
LCDCONTROLIC
R401
0
VCCD_1_8
VCCD
VCCD
100PF
C407
100NF
C404
VBAT
0
R425
C411
100NF
VCCD_1_8
TP40
1
R410
0
VSS5C8
VSS6L9
VSS7J11
WAIT#
A6
C5WE
#
C6
C14SCANEN
SCK#
B5
SCS#
G2
SI
A8
TESTEN
C9
P3VCP
VSS1K4
VSS2G4
VSS3D6
L7
VSS4
NT
PIOVDD1
F11
C10PIOVDD2
PIOVDD3
L12
D8PIOVDD4
PLLVDD
M4
N3PLLVSS
RD
#
A7
G1
RESERVED
1F1
RESERVED
2
B8RESET#
SA0
HIOVDD3
D7
D5HIOVDD4
M|R#
B4
NC
1A1
P1
NC
2
NC
3A14
P14
NC
4
NC
5E5
1
NC
6
NC
72
C7
GPIO20
GPIO21
B2
GPIO3
N1
2
M1
3GPIO4
GPIO5
M1
4
B11GPIO6
GPIO7
L14
B10GPIO8
GPIO9
L13
HIOVDD1
L4
F4HIOVDD2
GPIO10
GPIO11
N2
N1GPIO12
N1
4GPIO13
N1
3GPIO14
GPIO15
B1
A13GPIO16
GPIO17
B14
B13GPIO18
GPIO19
A2
M12 GPIO2
P13
G12
FPDAT9
FPFRAME
C13
FPLINED12
FPSCLK
F13
F14
FPSHIFT
FPSOK12
FPVIN
1A9
B9
FPVIN
2
A10GPIO0
GPIO1
P12
P2
H12
D13
FPDAT15
FPDAT16H13
H14
FPDAT17
FPDAT2F12
E14
FPDAT3
FPDAT4E13
E12
FPDAT5
FPDAT6D14
G14
FPDAT7
FPDAT8C12
DB
9
DRDY
C11
J14
FPA0
FPCS1X
G13
A11
FPCS2X
FPDAT0A12
B12
FPDAT1
FPDAT10K13
K14
FPDAT11
FPDAT12J13
J12
FPDAT13
FPDAT14
E1
DB13
DB14F3
F2
DB15
DB
2B3
L3
DB
3
DB
4M3
L2
DB
5
DB
6M2
D2
DB
7
DB
8D3
D4
CNF5
CNF6L10
COREVDD
1L5
D10
COREVDD
2
COREVDD
3H11
C4CS#
DB
0A4
A3
DB
1
DB10E4
E3
DB11
DB12E2
L6
M6CM2DAT5
CM2DAT6
P5
N6CM2DAT7
P6
CM2HREF
N7
CM2VREF
CNF0G11
L11
CNF1
CNF2K11
D9
CNF3
CNF4E11
D11
CM1DAT6
P10
P11CM1DAT7
M8
CM1HREF
N8
CM1VREF
M7
CM2CLKIN
CM2CLKOUT
P7
CM2DAT0
P4
N4CM2DAT1
CM2DAT2
N5
M5CM2DAT3
CM2DAT4
BE#1
CIOVDD
L8
CLKIM1
M9
CM1CLKINP8
CM1CLKOUT
CM1DAT0
N9
P9CM1DAT1
CM1DAT2
N1
0
M10 CM1DAT3
CM1DAT4
M11
N1
1CM1DAT5
C1
D1AB18
B7AB
2
AB
3
H2
G3AB
4
AB
5
H3
H4AB
6
AB
7
J1
J3AB
8
AB
9
J2
B6BE#0
A5
U402
AB
1
H1
J4AB10
AB11
K3
K1AB12
AB13
K2
L1AB14
AB15
C3
C2AB16
AB17
100N
F
C408
TP40
0
100K
R406
R405
100K
EN
1
3GND
IN5
NC
2
OUT4
U403
C401
20PF
100NF
C406
100NF
C412
VCCDVCCD_1_8
C463
NC
R411
C405
VCCD
0
R4120
6.3V
10UF
CAMPWR_O
N
MLED_EN
DIM_CTL
CAM_D(4)
CAM_D(5)
CAM_D(6)
CAM_D(7)
LCDC_C
S
CP_WEN
CP_OEN
A(19)
FLASH_RST
LCDC_INT
CAM_RST
UPPER_BYTE
CAM_CLK
A(7)
A(8)
A(9)
A(10)
CLK32K
MLCD_CS
LCD_A
LCD_WEN
CAM_D(0:7)
CAM_D(0)
CAM_D(1)
CAM_D(2)
CAM_D(3)
LCD_D(2)
LCD_D(1)
LCD_D(0)
A(1:18)
A(1)
A(2)
A(11)
A(12)
A(13)
A(14)
A(15)
A(16)
A(17)
A(18)
A(3)
A(4)
A(5)
A(6)
D(14)
D(15)
D(2)
D(3)
D(4)
D(5)
D(6)
D(7)
D(8)
D(9)
D(0:15)
LCD_D(0:7)
LCD_D(7)
LCD_D(6)
LCD_D(5)
LCD_D(4)
LCD_D(3)
CAMPWR_ON
HVDD
P_CLK
HOR_REF
VER_REF
SCL
SDA
LOWER_BYTE
D(0)
D(1)
D(10)
D(11)
D(12)
D(13)

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SGH-S341i Flow Chart of Troubleshooting
2-13
This Document can not be used without Samsung's authorization
F502 CHECK
pin13 ≥ -65dBm ?
2.RF
1. EGSM RX
CONTINUOUS RX ON
RF INPUT : 62CH
AMP : -50dBm
NORMAL CONDITION
catch the channel?
CHECK
ANT501,R509 contact ?
U501
pin 9,31: 2.8V ?
F502 CHECK
pin1,2 ≥ -65dBm ?
U501 CHECK
pin20,21 ≥ -65dBm ?
C518,CN403
resolder or change
F502
resolder or change
C527,C528,L503
resolder or change
U102 pinA13, C127
change or resolder
U501 CHECK
pin 8 : 13MHz ?
Vp-p : 950mV?
OSC501
change or resolder
U501
resolder or change
U102 CHECK!!
U501
pin1,2,3,28 Vp-p
: 120mV ?
NO
YES
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES

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SGH-S341i Flow Chart of Troubleshooting
2-14
This Document can not be used without Samsung's authorization
F502 CHECK
pin13 ≥ -65dBm ?
2. DCS RX
CONTINUOUS RX ON
RF INPUT : 698CH
AMP : -50dBm
NORMAL CONDITION
catch the channel?
CHECK
ANT501,R509 contact ?
U501
pin 9, 31: 2.8V ?
F502 CHECK
pin3,4 ≥ -65dBm ?
U501 CHECK
pin18, 19 ≥ -65dBm ?
C518,CN403
resolder or change
F502
resolder or change
C530,C532,L504
resolder or change
U102 pinA13, C127
change or resolder
U501 CHECK
pin 8 : 13MHz ?
Vp-p : 950mV?
OSC501
change or resolder
U501
resolder or change
U102 CHECK!!
U501
pin1,2,3,28 Vp-p
: 120mV ?
NO
YES
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES

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SGH-S341i Flow Chart of Troubleshooting
2-15
This Document can not be used without Samsung's authorization
F502 CHECK
pin13 ≥ -65dBm ?
3. PCS RX
CONTINUOUS RX ON
RF INPUT : 660CH
AMP : -50dBm
NORMAL CONDITION
catch the channel?
CHECK
ANT501,R509 contact ?
U501
pin 9, 32: 2.8V ?
F502 CHECK
pin5,6 ≥ -65dBm ?
U501 CHECK
pin16,17 ≥ -65dBm ?
C518,CN403
resolder or change
F502
resolder or change
C535,C536,L505
resolder or change
U102 pinA13, C127
change or resolder
U501 CHECK
pin 8 : 13MHz ?
Vp-p : 950mV?
OSC501
change or resolder
U501
resolder or change
U102 CHECK!!
U501
pin1,2,3,28 Vp-p
: 120mV ?
NO
YES
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
F502 CHECK
pin12 : 2.8V
YES
U102
check & change
NO

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SGH-S341i Flow Chart of Troubleshooting
2-16
This Document can not be used without Samsung's authorization
4. EGSM TX
F502 pin 10 :
about 2~3 dBm?
C518,CN403
check&change
F502
pin11:2.8V?
U102
check & change
U502 pin12 :
about 4~5dBm?
F502
check & change
U502
pin8,20:3.7V?
NO NO
YES
YES
YES
NO
NO BATTERY
check & change
U502
pin 22 : 1.6V ?
YES
NO
U502 pin6
about : -5dBm ?
YES
U502
pin 2 : 3V?
YES
YES
U502
change or resolder
NO
U102
check
U102
check
NO
U501
pin9,32 : 2.8V ?
U102 pinA13,C127
change or resolder
YES
U501
pin8 : 13MHz ?
Vp-p : 950mV?
U501
pin4,5,6,7:100mV?
YES
U102
change or resolder
NO
NO
U501
change or resolder
YES
NO OSC501
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

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SGH-S341i Flow Chart of Troubleshooting
2-17
This Document can not be used without Samsung's authorization
5. DCS TX
F502 pin 8 :
about 2~3 dBm?
C518,CN403
check&change
F502
pin9 : 2.8 V?
U102
check & change
U502 pin17 :
about 4~5dBm?
F502
check & change
U502
pin8,20:3.7V?
NO NO
YES
YES
YES
NO
NO BATTERY
check & change
U502
pin 22 : 1.4V ?
YES
NO
U502 pin5 about
:-5dBm?
YES
U502
pin 2 : 3V?
YES
YES
U502
change or resolder
NO
U102
check
U701
check
NO
U501
pin9,32 : 2.8V ?
U102 pinA13,C127
change or resolder
YES
U501
pin8 : 13MHz ?
Vp-p : 950mV?
U501
pin4,5,6,7:100mV?
YES
U102
change or resolder
NO
NO
U501
change or resolder
YES
NO OSC501
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