Samsung SGH-E720 User manual

GSM TELEPHONE
SGH-E720
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

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1. SGH-E720 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 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-E720 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
TX Power
control level PCS1900
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-E720 Flow Chart of Troubleshooting
2-1
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2-1.Baseband
2-1-1. Power ON
'Power ON' Does not work
Check the current consumption
Current consumption
≥100mA ?
Check the V bat. voltage
Down load again
Voltage ≥3.3V ?
Check the pins of U401
C415 ≥1.8V ?
Check the Initial operation
END
C418 and C419 = 2.8V?
Charge the Battery
Checktheclockgeneration
circuit (OSC101, F100 pin#4)
Checktheclocksignal
at pin #3 of OSC101
Freq.=13MHz,Vrms ≥300mV
Check U401 and C420
Check U401 and C415
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
C420=1.5V?

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SGH-E720 Flow Chart of Troubleshooting
2-2
This Document can not be used without Samsung's authorization
BOARD_HOLE
G2G3
JTAG
TRIDENTHP
G1G4
RST
DSP_TDO
DSP_TDI
DSP_TMS
DSP_TCK
DSP_RWN
VBAT
JIG_ON
SDS_RXD
SDS_TXD
ANT
USB_5V
USB_D+
USB_D-
SPK1P
SPK1N
MIC+
MOT
MIC-
C205
R207
V201
CN506
11
1515
16
16
VCCD
2
Q200
1
3
2
2
28
28
2929
33
30
30
3131
4
4
55
6
6
ANT
32
D+9
10
D-
F-WE
22
GND7
GND
24
25HP/POWER
MIC+13
14
MOT+
RXD
26
SPK+11
12
SPK-
21TCK
C207
19TDI
TDO
18
TMS
20
17TRST
27TXD
C217
23V_BATT
C211
8
V_BUS
C221
VCCD_1_8
C220
F200
4Y
VCCD
U204
2
A
1
B
3
GND
5
VCC
C223
C222
OSC201
VCCD_1_5
C206
100K
R241
VCCD_1_8
R243
R209
R208
C202
R242
C208
C201
C204
C216
VRTC
H11
VSS8
H12
VSS9
R11
VSSA_D
VSSA_U F18
X1RTC
H19
X2RTC
F19
VSS14
M9
VSS15
VSS16 M10
VSS17 M11
M12
VSS18
VSS2 A18
VSS3 G8
VSS4 G9
VSS5 H8
H9
VSS6
H10
VSS7
C1
C14
VDD_IO_1P8_6
D9
VDD_IO_1P8_7
D18
VDD_IO_1P8_8
VDD_IO_1P8_9 F1
VRTC G18
A2
VSS1
J12
VSS10
VSS11 K8
L7
VSS12
VSS13 L8
M8
P1
VDD_IO_1P8_12
T18
VDD_IO_1P8_13
VDD_IO_1P8_14 U1
VDD_IO_1P8_15 U5
U12
VDD_IO_1P8_16
W8
VDD_IO_1P8_17
W18
VDD_IO_1P8_18
VDD_IO_1P8_2 B6
VDD_IO_1P8_3 B12
B16
VDD_IO_1P8_4
VDD_IO_1P8_5
B8
VDD_CORE2 B13
G2
VDD_CORE3
H18
VDD_CORE4
VDD_CORE5 M2
VDD_CORE6 N18
VDD_CORE7 V7
VDD_CORE8 V13
VDD_IO_1P8_1 B4
L4
VDD_IO_1P8_10
L16
VDD_IO_1P8_11
V14
TDOT12
TEST1U15
T14
TEST2
TEST3V16
W14
TMS
TRSTN R12
TX0
M3
K7 TX1
T11
VDDA_D
F17
VDDA_U
VDD_CORE1
T2 SIMIO
SPCLK0
R3
M18
SPCLK1_PIO18
T3 SPFS0
N15
SPFS1_PIO15
R4 SPRXD0
SPRXD1_PIO17M17
U2 SPTXD0_I2SD
N16
SPTXD1_I2SD_PIO16
TCKU14
TDI
PIO43_MCI_DAT0_EN
J16
PIO47
PWM1_PIO46
G5
RESTN G15
RIO_PIO01
P3
RTCALARMN
H17
N2 RTS0_PIO04
RWNV6
M1 RX0_IRQ28
L6 RX1_IRQ28
SIMCLK
P4
R13
U18
PIO33
PIO34R14
PIO35_A_A25_BOOTSEL
F2
F16 PIO36_USB_OEN
E17 PIO37_USB_DATA
PIO38_MCI_CLK
J15
L14 PIO39_MCI_CMD_EN
PIO40_MCI_DAT_EN
M14
R16 PIO41_IRDATX
PIO42_IRDARX
R17
N14
K13 PIO21_MCI_DAT0
PIO22_MCI_DAT1
L12
L13 PIO23_MCI_DAT2
L15 PIO24_MCI_DAT3
V19 PIO25
U16 PIO26
PIO27
U19
PIO28
W17
E14PIO30_WAITN
P12
PIO31_IRQ6
PIO32
P16
PIO07_USB_SUSP
B19
PIO08_MCI_CMD
J13
C19 PIO09_USB_VPI
PIO10
V17
PIO11_USB_VMI
C18
D17 PIO12_USB_VPO
E16 PIO13_USB_VMO
P5 PIO14_SIMRST
P15 PIO19_PWRKEEP
PIO20_SYSCLKREQ
P19
J5
KEYBRD3
J4
J8 KEYBRD4
KEYBRD5
H6
H4 KEYBRD6
KEYBRD7
H1
KEYBRD8
H3
G6 KEYBRD9
1
NC1
2
NC2
G16 OSC32OUT
PIO00_IRQ5
IOBIT0_PIO05V12
N11
IOBIT1_PIO06
IRQ1M16
M19
IRQ2
IRQ3P17
IRQ4P18
J7 KEYBRD0
KEYBRD1
J6
KEYBRD10
G4
KEYBRD11_PSW1_BUF
H2
KEYBRD2
D_D2
D_D3T7
R8
D_D4
V8
D_D5
U8
D_D6
D_D7T8
T9
D_D8
D_D9R9
FLASHRSTN
H14
T15
INT0
IOW6
D_A6
N6
D_A7
R6
D_A8
D_D0U6
D_D1T6
P8
D_D10
P9
D_D11
N8
D_D12
N9
D_D13
D_D14N10
D_D15P11
R7
M6 CTS0_PIO29
N5 DCD0_PIO44
P2 DSR0_PIO02
DTR0_PIO03
N4
V1
D_A0
W2
D_A1
W3
D_A2
V3
D_A3
D_A4U4
D_A5T5
V4
A_D4
F11A_D5
E11A_D6
A_D7
G12
A_D8
D11
A_D9
E12
A_OEN
B14
D14A_WEN
W12
CKI
N12
CKO_IACK
T17
CPTSTSTOP_CKO
B17
A8A_D0
A_D1
E9
C12A_D10
A_D11
A12
F12A_D12
D12A_D13
E13A_D14
D13A_D15
A_D2
F9
A_D3
G10
G11
A_A9
C2
H16A_BE0N
A_BE1N
A17
A14A_CS0N
C15A_CS1N
A_CS2N
G14
A_CS3N
J14
A_CS4N
D15
C16A_CS5N
F15A_CS6N
A_CS7N
A_A20
A_A21
E3
A_A22
F5
A_A23
F4
A_A24
F3
A_A3
A6
C6A_A4
A_A5
C5
D7A_A6
A_A7
E7
C4A_A8
A_A10
A_A11
B3
B1A_A12
D6A_A13
D5A_A14
A_A15
D3
A_A16
E8
A_A17
F8
A_A18
E6
D2A_A19
A_A2
D8
E4
U201
ATCK_CTS1M4
L5
ATDI_RTS1
T13
ATDO_PWM2
K12
ATMS_PIO45
A_A0
B7
A_A1
C8
A3
VCCD
C210
C209
C203
VCCD_1_8
GND
3
2
OUT
VCC
1
U203
RST
USB_VPI
USB_SUSP
CLK32K
KEY_ROW(3)
KEY_ROW(2)
KEY_ROW(1)
KEY_ROW(0)
PSW1_BUF
KEY_ROW(4)
KEY_COL(0)
DEBUG_CTS
CLK13M_TR
CP_WEN
D(15)
CP_TDO
RAM1_CS
SIMDATA
SIMCLK
SDS_RXD
DEBUG_RXD
DEBUG_RTS
RTCALARM
USB_DATA
USB_OEN
EAR_SWITCH
HALL_SENSOR
XOENAQ
PWR_KEEP
SIMRST
USB_VMO
USB_VPO
USB_VMI
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)
A(23)
A(24)
A(1:24)
SDS_TXD
DEBUG_TXD
DSP_TMS
DSP_TDO
UP_SCLK
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(0:15)
UPPER_BYTE
ONENAND_CS
ROM1_CS
FLASH_RESET
CP_OEN
A(0)
A(1)
A(2)
A(3)
A(4)
DSP_DB(8)
DSP_DB(9)
DSP_DB(10)
DSP_DB(11)
DSP_DB(12)
DSP_DB(13)
DSP_DB(14)
DSP_DB(0:15)
DSP_DB(15)
KEY_COL(4)
KEY_COL(3)
KEY_COL(2)
KEY_COL(1)
UP_CS
D(0)
D(1)
D(2)
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_DB(1)
DSP_DB(2)
DSP_DB(3)
DSP_DB(4)
DSP_DB(5)
DSP_DB(6)
DSP_DB(7)
LCDC_CS
YMU_CS
LOWER_BYTE
KEY_COL(0:4)
DSP_RWN
DSP_IO
DSP_INT
USB_CON
INTRQ
JACK_INT
YMU_IRQ
LCDC_INT
CP_TMS
CP_TCK
CP_TDI
DSP_AB(0)
PCM_IN
PCM_SYNC
HALL_SENSOR
DSP_TCK
DSP_TDI
OLED_BACK_EN
FLASH_EN1
AUDIO_OUT_SEL
UP_SDI
UP_SDO
M_HOLD
EAR_OUT_SEL
VBT_EN
KEY_ROW(0:5)
DLC_DETECT
BT_SLEEP
DIM_EN
VCAM_EN
JIG_ON
BP_VF
AMP_SHDN
BRIGHTNESS
P_MODE
USB_DET
NAND_INT
PCM_CLK
PCM_OUT
KEY_ROW(5)

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SGH-E720 Flow Chart of Troubleshooting
2-3
This Document can not be used without Samsung's authorization
2-1-2. Initial
The voltage at the C415=1.8V?
The voltage at the C419=2.8V?
Initial Failure
ThevoltageattheZD405
" Low --> High" ?
There is 32.768KHz wave
form at the C216, C217 ?
The voltage on R412 is
"Low --> High" ?
The voltage is 2.8V
at the C416,C418,C419 ?
LCD Display OK ?
Sound operation OK ?
END
Check the U201
Check the U201
Check the U401
Check the LCD part
Check the Audio part
YES
NO
NO
NO
NO
YES
YES
YES
YES
YES
NO
NO
NO
YES
Check the U401
(If it has some problem,
it has to be replaced.)
Check the U401
(If it has some problem,
it has to be replaced.)

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SGH-E720 Flow Chart of Troubleshooting
2-4
This Document can not be used without Samsung's authorization
VCCB
VCCD_1_5
C421
C426
TH101
VCCD
EAR_CHECK
RST
PCS_RX_EN
AUXOUTN
RTXIN
SERDAT
FLASH_RESET
VCCA
C418
C403
C402
VCCD_1_8
VBAT
R413
C409
C428
VCCD
R407
ZD405
M400
NEG POS
VRF
VBAT
C408
VSS3 R2
P6
VSS4
VXVCM
R13
XOENAQ
D1
C405
VCCA
VCCB
VRF
C458
DSP_DB(0:15)
DSP_AB(0:8)
SIM_RST
BP_VF
SIM_CLK
MICOUTP
MICOUTN
MICINP
MICINN
DSP_DB(0)
KEY_BL2
KEY_BL1
DSP_IO
INTRQ
DSP_INT
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(15)
DSP_DB(14)
DSP_DB(13)
DSP_DB(12)
DSP_DB(11)
DSP_DB(10)
DSP_DB(1)
C400
R412
C417
VRTC
C419
VCCB
C414
VCCD_1_8
R414
PSW1_BUF
C401
C416
C404
VBAT
UP_CS
AUXOUTP
AUXINP
AUXINN
AOUTBP
AOUTBN
AOUTAP
AOUTAN
AFC
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)
B12
VLDO_5B10
VLDO_6A14
VLDO_7C12
VREFA10
VREGN
R14 VREGP
M13
VRTCH11
VSIMK12
VSS1 G5
VSS2 K4
VEXTE14
VIB_DRVF15
L9
VIB_RNG_EN
VL4S_AA12
VL4S_BB11
VL5S_AD10
C9
VL5S_B
VLDO_1G11
VLDO_2J12
VLDO_3A13
VLDO_4
VDD2 M3
VDD3 N6
C11
VDD34
VDD5 C10
VDD67 B13
VDDB A6
VDDD N11
VDDV L11
VDD_IO1 N5
VDD_IO2 J4
VDD_OCTL C4
K14
SIM_IOJ11
SIM_RSTK11
TXP
E7
UP_CLKN9
UP_IOP10
UP_RSTR10
VACCF14
VBATE13
VDD1 J3
VDD12J13
D6 RXTXIP
D7
RXTXQN
C6 RXTXQP
C7
SCLK_PSCL8
M7
SDI_PSC
SDO_PSCN7
SERCK
C2
C1SERDA
B1SERLE1
SERLE2
A2
SIM_CLK
PWR_SW1N
C15 PWR_SW2
C14
RAREF1
B6 RAREF2
B5
R3RESETN_CSP
RESET_O
K9
RING_DRVF13
RTC_ALMN
H10
RTC_CLK
N4
RWN
L2
RXTXIN
P5
OCTL0
E6
C5OCTL1
OCTL2
F5
E5OCTL3
OCTL4
A4
G6OCTL5
OCTL6
B3
A3OCTL7
PSW1_BUF
L7
PWR_KEEP
M9
I|O
LED1_DRVG13
LED2_DRVG12
MC
R6
MICINN
M14 MICINP
N14
MICOUTN
P15 MICOUTP
N15
MODE
N10
1
NC5
NC6 2
NC7
GNDS6 G8
GNDS7 G9
GNDS8 G10
GNDS9 H6
GNDV P13
GND_HCUR F11
GND_OCTL B4
GND_PSC1 B15
GND_PSC2 K15
INTRQ
L10
L3
GNDS11 H8
H9
GNDS12
GNDS13 J7
GNDS14 J8
GNDS15 J9
GNDS16 J10
GNDS17 K10
GNDS2 F8
GNDS3 F9
GNDS4 F10
GNDS5 G7
H5DB6
G3DB7
G4DB8
F4DB9
F1
DINTR
P3
GNDB F6
M10
GNDD
GNDQ E8
GNDS1 F7
GNDS10 H7
K2DB1
DB10
F2DB11
F3DB12
E2DB13
E3DB14
D3
D2DB15
DB2
K3
J5DB3
DB4
J6
DB5
D13
CH_BDRVE11
CH_ISENF12
CH_RESD14
E9
CREF
K8
CSN_PSC
DAICK
R4
DAIDI
L6
DAIDO
M6
DAIRN
P4
DB0
K1
E10
ADC_AUX2D15
AFC
D9
AOUTAN
N12 AOUTAP
P11
AOUTBN
P12 AOUTBP
R12
AUXINN
L14 AUXINP
M15
AUXOUTN
L13 AUXOUTP
K13 AUX_ADC3
U401
AB0
K6
P1AB1
AB2
L5
N1AB3
AB4
N2
M2AB5
AB6
M1
K7AB7
AB8
K5
ADC_AUX1
C456
C407
R405
55
6
6
7
G
G
8
9
G
G
10
CN401
1
1
22
3
34
4
C406
R406
C420
C427
C415
C457
SIMCLK
VAPC
SIM_RST
SIM_IO
SIM_CLK
SERLE
SERCLK
UP_SDO
UP_SDI
UP_SCLK
RTXQP
RTXQN
RTXIP
DSP_RWN
CLK32K
RTCALARM
JIG_ON
PWR_ON
PWR_KEEP
PAC_EN
RF_EN
TX_BAND_SEL
VSIM
SIM_IO
XOENAQ
VSIM
DCS_TX_EN
GSM_TX_EN
VIB_EN
MOT
SIMRST
SIMDATA

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SGH-E720 Flow Chart of Troubleshooting
2-5
This Document can not be used without Samsung's authorization
2-1-3. Sim Part
The voltage is 2.8V
at the pin #1 of CN401? Check the U401
"Insert SIM" is displayed on the LCD
END
Check the SIM Card
YES
NO
NO
YES
Is there any signal
pin #2,3,4 of CN401 ? Check the U401 & U201

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SGH-E720 Flow Chart of Troubleshooting
2-6
This Document can not be used without Samsung's authorization
2-1-4. Microphone Part
Micro-phone does not work
Is the assembled status of
Microphone O.K?
YES
Reassemble the microphone
NO
Check the DC bias voltage on
Mic path.
The voltage of C437 is
about 2.2V±10%?
NO Solder the microphone again
or Replace
C437,C438,R428,R430,R433
Is microphone OK? NO Check U401
END
YES
YES

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SGH-E720 Flow Chart of Troubleshooting
2-7
This Document can not be used without Samsung's authorization
MSPK+
MSPK-
R422
ZD402
R424
R404
R455
C445
AOUTBP
MELODY+
SPK1N
AUDIO_OUT_SEL
AOUTBN
AOUTAP
AOUTAN
9
VREF
VSS
8
/CS
29
3
/IRQ
/RD
31
/RST
4
28
/WR
R401
C465
R430
C463
C413
C440
MICOUTP
MICINP
MICOUTN
MICINN
C435
R433
200
VCCD_1_8
C422
C423
C450
VCCA
V404
ZD406
C447
L402
R428
R457
C466
R402
C451
V400
CP_OEN
A(0)
YMU_CS
VIB_EN
HPOUT-L
HPOUT-R
CP_WEN
LOUT
SPK1P
EAR_R
EAR_L
MIC+
EAR_R
EAR_L
MIC-
HPOUT-R
HPOUT-L
ROUT
EAR_CHECK
EAR_SWITCH
MELODY-
EAR_OUT_SEL
C433
C453
GND
NC
21
22NC
14
V+
VBAT
C441
C436
VCCD
R423
C452
C446
VCCD_1_8
VCCD_1_8
3.3V_SW_AK
C462
R464
G
1314
G
G15
16
G
17
G
G18
R429
C411
C437
R471
R436
V401
C449
C425
C448
MIC400
3.3V_SW_AK
U403
3
3
CN400
1
1
1010
22
R458
C444
C430
R453
C467
3S2
11
4S1
13
4S2
D1
16
4D2
D3
8
D412
6
GND
17
21-2IN
15
1S1
11S2
2S1
3
5
2S2
3-4IN10
3S1
7
9
C4741UF
44
5
5
66
7
7
88
9
9
11
G
12
G
C434
C472
19
MTR
5
NC
PLLC
6
17
SPOUT1
SPOUT2
18
15
SPVDD
SPVSS
16
7
VDD
33
G
G
3435
G
G
36
HPOUT-L/MONO
10
11
HPOUT-R
IOVDD
32
LED
2
2423
D4
D5
2221
D6
D7
20
EQ1
12
13
EQ2
EQ3
14
U402
30
A0
1
CLKI
D0
27
26
D1
25
D2
D3
C438
C439
C412
C432
C461
C464
L401
R403
R473
1UF
C475
R421
R410
R472
C424
C468
C469
V403
C410
R434
F400
R454
JACK_INT
AUXINP
AUXOUTP
AUXINN
AUXOUTN
CLK13M_YMU
D(2)
YMU_IRQ
RST
D(5)
D(6)
D(7)
D(4)
D(3)
D(1)
D(0)

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SGH-E720 Flow Chart of Troubleshooting
2-8
This Document can not be used without Samsung's authorization
2-1-5. Speaker Part
Is the terminal of speaker O.K? NO Replace the speaker
Are there any signal
at the pin #40,42 of CN507?
NO Check the LCD module
&ReplaceCN507
There is no sound from speaker
YES
YES
Thetypeofsoundfrom
the speaker is Melody?
YES NO
Are there any signal
at the pin #1,5 of U403?
Are there any signal
at the pin #3,15 of U403?
Check
U402,
U401,
U201
NO NO
Pin #2 of U403
is Low?
Pin #2 of U403
is High?
Check U403
NO NO
YES YES
YESYES
END
Pin 14 of U403
is 3.3V?
YES
Pin 3 of U303
is High?
NO
Check U303
YES
NO
Check U401

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SGH-E720 Flow Chart of Troubleshooting
2-9
This Document can not be used without Samsung's authorization
2-1-6. Camera Part
Camera function does not work
Check the connect CN507?
NO Connect the CN507
Pin#4ofU306=1.8V?
NO
NO
Pin#3 of OSC300 is 24.5MHz?
NO
Pin #10 of U302 = 2.5V?
Check
U201
END
YES
YES
YES
YES
Is that clock signal at the
pin #30 of CN507?
NO
Pin#2ofU302=High?
YES
Check the U306&R376
Check
U201
NO
NO
Pin#56 of CN507 is High? Check
U300
Replace
OSC200
YES
Check
Q301
Pin#3ofQ301=1.8V?
NO
YES
Pin#1ofQ301=Low?
NO
YES

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SGH-E720 Flow Chart of Troubleshooting
2-10
This Document can not be used without Samsung's authorization
D(0)
D(14)
2
4
OSC300
D(1)
D[0:15]
D(10)
D(9)
D(8)
D(7)
D(6)
D(5)
D(4) D(3)
D(2)
D(1) D(0)
D(0:15)
D(13)
D(12)
2.5V_VCAM
D(0:15)
D(15)
D(14)
D(13)
D(12)
D(11)
VBAT
D(11) D(10)
D(9)
D(8)
D(7)
D(6)
D(5)
D(4)
D(3)
D(2)
A(18)
CP_WEN
VCAM_EN
D(15)
A(1:16)
A(16)
A(15) A(14)
A(13)
A(12)
A(11)
A(10)
A(9) A(8)
A(7) A(6)
A(5) A(4)
A(3)
A(2) A(1)
A(24)
A(15)
A(14)
A(13)
A(12)
A(11)
A(10)
A(9) A(8)
A(7) A(6)
A(23)
A(5)
A(4)
A(3)
A(2)
A(1)
A(22)
A(21)
A(20)
A(19) A(18)
A(17) A(16)
A(1:24)
C312
ONENAND_CS
NAND_INT
ROM1_CS
LOWER_BYTE
CP_OEN
UPPER_BYTE
CP_WEN
FLASH_RESET
RAM1_CS
C310
R318
C327
2.5V_VCAM
C322
1
3
2
R302
C358
1.8V_VCAM
C308
VCCD_1_8
VCCD_1_8
C326
4CBYP
U302
R204
R202
R203
HERA_1_8
C219
R205
U300
R380
C346
C311
C330
C329
VBAT
16
GND
N/C
5
8
N/C
N/C7
VIN
110
VOUT1
VOUT29
R303
SCL
RST
FLASH_RESET
LCD_RD
D(1)
D(0)
D_SDIN
P_CLK
M_CLK
HOR_REF
CAM_D(0:7)
A(2)
A(8)
M_HOLD
VCCD
Q301
C367
2.5V_VCAM
C328
HERA_1_8
3
1
D_SDOUT
D_MSCK
D_BCK
D_LRCK
SDA
LCD_AD_(15)
LCD_AD_(14)
LCD_AD_(13)
LCD_AD_(12)
LCD_AD_(11)
LCD_AD_(10)
VDDCF5
VDDC
D6
VDDI
VDDIF6
VDDICDH1
XIN2
B10
A10 XOUT2
3
NC5
4
OUT
C362
U306
6
BYP
EN
1
2GND
GND
7
IN
B3
SVDDIE3
T_MODE0 K10
USB_DMG2
G1
USB_DP
UVDDIG4
VDDACK9
D5
VDDCE5
E10
M_SD8
E9
E7 M_SD9
M_WR_N
A7
2
NC
NC 1
A9
PGNDB9
PVDD
STROBE
M_SD13
M_SD14
D8
C10 M_SD15
M_SD2
G8
F10 M_SD3
M_SD4
F9
F8 M_SD5
F7 M_SD6
M_SD7
B7
C9 M_SA0
M_SA1
C8
M_SD0
G10
G9 M_SD1
E8 M_SD10
D10 M_SD11
D9 M_SD12
D7
K7
L_WR_N
J7
MS_CS_N
C6
B8 M_ADS
M_CS_N
A6
M_HOLE
B6
C7 M_INTR
A8 M_RD_N
M_RESET_N
K4
J4L_DA4
L_DA5
K1
K2L_DA6
K3L_DA7
J2L_DA8
L_DA9
J3
J8L_RD_N
L_RESET_N
H3
L_DA12
H4
L_DA13
J5
H5L_DA14
L_DA15
G3
H6L_DA16
L_DA17
G6
K5L_DA2
L_DA3
GPIO_4 A4
GPIO_5
LS_CS_N
H8
G7L_ADS
L_CS_N
H7
K6L_DA0
L_DA1
J6
H2L_DA10
L_DA11
GND
GNDE6
G5
GND
GNDJ1
GPIO_0 C5
GPIO_1 B5
A5
GPIO_2
GPIO_3 C4
B4
A1
D_BCK J10
H9
D_LRCK
J9
D_MSCK
K8
D_SDATAIN
H10
D_SDATAOUT
D4
GND
GNDE4
F4
C_D7
C_HS C3
A2
C_MCLK
B2
C_PCLK
B1
C_PWDN
C_RST A3
C1
C_SCK
C_SDA C2
C_VS
C_D0 D3
D2
C_D1
C_D2 D1
E2
C_D3
C_D4 E1
F1
C_D5
C_D6 F2
F3
2EN1
EN2
3
6
GND
GND
1112
GND
GND
13
14
GND
15
GND
VER_REF
CAM_RST
D(9)
D(8)
D(7)
D(6)
D(5)
D(4)
D(3)
D(2)
D(15)
D(14)
D(13)
D(12)
D(11)
D(10)
MLCD_CS
M_HOLD
L_ADS
LCD_WEN
LCDC_INT
CP_OEN
LCDC_CS
A(1)
LCD_AD_(00)
LCD_AD_(01)
LCD_AD_(02)
LCD_AD_(03)
LCD_AD_(04)
LCD_AD_(05)
LCD_AD_(06)
LCD_AD_(07)
LCD_AD_(08)
LCD_AD_(09)
LCD_AD_[00:15]
SUB_L_CS

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SGH-E720 Flow Chart of Troubleshooting
2-11
This Document can not be used without Samsung's authorization
2-1-7. Mp3 Display Part
NO
Replace the Earphone
Are there any signal
at the pin #8,12 of U403?
NO
Check C439,440,474,475,452,448
& L401,402, V400,401
There is no MP3 sound from Earphone
YES
YES
Are there any signal
at the R350,351?
NO
The voltage of C334
is 3.3V?
NO
YES
YES
END
Check the U301
Are there any signal
at the pin #4,6 of CN400?
Are there any signal
at the pin #9,13 of U403?
NO
YES Pin #10 of U403
is Low?
NO
YES
Pin 14 of U403
is 3.3V?
YES
Pin 3 of U303
is High?
NO
YES
Check
U201
Check
U403
Check
U303
END
NO
Check U401
Check
R350,351
The voltage of C344
is 2.5V?
NO
YES
Pin 2 of U302
is High?
Check
U302
NO
YES
Check
U201
Check the U300
Check the U201

SAMSUNG Proprietary-Contents may change without notice
SGH-E720 Flow Chart of Troubleshooting
2-12
This Document can not be used without Samsung's authorization
KEY_BL1
KEY_BL2
VBAT
AOT-0603P-W03-X LED304
AOT-0603P-W03-X LED308
LED309
CAM_DA(5)
LCD_AD_(08)
AOT-0603P-W03-X
C519
AOT-0603P-W03-X LED310
LED311
LCD_AD_(10)
SPK1N
SPK1P
KEY_COL(0)
MP3_GND
LCD_AD(05)
LCD_AD(03)
KEY_COL(2)KEY_COL(1)
CAM_RST
LCD_RD
AOT-0603P-W03-X
LED312
AOT-0603P-W03-X
LED313AOT-0603P-W03-X
R307
9
8
OUT2
OUT3 7
6
OUT4
R308
OUT4
6
R309
310
311
R312
R313
AOT-0603P-W03-X LED314
C522
R314
AOT-0603P-W03-X LED315
R316
F501
AOT-0603P-W03-X
LED303
LED302
AOT-0603P-W03-X
AOT-0603P-W03-X
LED301
306
R305
LCD_AD_(03)
LCD_AD_(01)
LCD_AD_(05)
LCD_AD_(07)
LCD_AD_(09)
CAM_DA(4)
CAM_DA(6)
CAM_DA(7)
CAM_DA(3)
CAM_DA(2)
CAM_DA(1)
CAM_DA(0)
LCD_AD(04)
LCD_AD(02)
LCD_AD(00) LCD_AD(07)
LCD_AD(05)
LCD_AD(03)
LCD_AD(01)
LCD_AD(14)
LCD_AD(12)
LCD_AD(10)
LCD_AD(08) LCD_AD(15)
LCD_AD(13)
LCD_AD(11)
LCD_AD(09)
LCD_AD_(00)
LCD_AD_(02)
LCD_AD_(06)
LCD_AD_(04)
LCD_AD(06)
304
GND
F505
5
LCD_AD_(13)
LCD_AD_(11)LCD_AD_(12)
CAM_D(0)
CAM_D(1)
CAM_D(2)
CAM_D(3)
CAM_D(4)
CAM_D(5)
CAM_D(6)
CAM_D(7)
LCD_AD_(15)
LCD_AD_(14)
LED317
AOT-0603P-W03-X
58 58
59 59
6
6
60 60
7
78 8
9
9
F503
510
GNDGND
AOT-0603P-W03-X LED316
C517
R356
R357
LED318
AOT-0603P-W03-X
3
IN3
4
IN4
9OUT1
8OUT2
7OUT3
OUT4
6
358
GND
105
GND
F500
IN4
OUT1
9
8OUT2
OUT3
7
6OUT4
F502
GND
51 0
GND
IN1 1
2
IN2
IN3 3
4
F504
5
GNDG ND
10
1
IN1
2
IN2
GND
510
GND
IN1
1
2IN2
IN3
3
IN4
4
OUT1
C516
1IN1
IN2
2
3IN3
4IN4
9
OUT1
8
OUT2
7
OUT3
OUT4 6
50
51 51 52 52
53 53 54 54
55 55 56 56
57 57
43 44 44
45 45 46 46
47 47 48 48
49 49
5
5
50
36
36
37
37 38
38
39
39
4
4
40
40
41 41 42 42
43
29
3
3
30
30
31
31 32
32
33
33 34
34
35
35
21 22 22
23
23 24
24
25 25 26 26
27 27 28 28
29
14
15
15 16
16
17
17 18
18
19
19
2
2
20
20
21
CN507
1
1
10
10
11
11 12
12
13
13 14
1
IN1
IN2 2
IN3 3
IN4 4
9OUT1
OUT2
8
7OUT3
OUT4
6
GND
10
1
IN1
IN2 2
3
IN3
4
IN4
9OUT1
8OUT2
7OUT3
FLASH_EN1
MLCD_CS
LCD_WEN
LCD_AD(14)
LCD_AD(12)
LCD_AD(10)
LCD_AD(08)
VCCD
MP3_MIC1.8V_VCAM
VBAT
2.5V_VCAM
OLED_BACK_EN
LCD_AD(06)
LCD_AD(04)
BRIGHTNESS
KEY_ROW(5)
LCD_AD(02)
DIM_EN
MOT
CAM_DA(7)
CAM_DA(6)
CAM_DA(5)
CAM_DA(4)
CAM_DA(3)
LCD_AD(00)
CAM_DA(2)
CAM_DA(1)
CAM_DA(0)
LCD_AD(01)
HOR_REF
VER_REF
P_CLK
M_CLK
SDA
SCL
FLASH_RESET
SUB_L_CS
L_ADS
LCD_AD(15)
LCD_AD(13)
LCD_AD(11)
LCD_AD(09)
LCD_AD(07)

SAMSUNG Proprietary-Contents may change without notice
SGH-E720 Flow Chart of Troubleshooting
2-13
This Document can not be used without Samsung's authorization
2-2.RF
2-2-1. EGSM RX
Continuous RX ON
RF Input : 62 CH
AMP : -50dBm
NORMAL CONDITION
Catch the channel ?
YES
NO
U106 Check
Pin #9 ≥-65dBm ?
U106 Check
Pin #11 ≥-65dBm ?
U103 Check
Pin#20,21 ≥-65dBm ?
Check soldered status of
R114,115,C152,109,L145
CN100,C108,L103
Resolder or Change
U106 Resolder or Change
U103 Check
Pin#9,32=Clean 2.8V?
U103 Check
Pin#28,1,2,3=100mV?
U401,C418,100,130
Check or resolder
Check U401
NO
NO
YES
YES
YES
YES
NO
YES
U103 Check
Pin #8 : 13MHz ?
Vpp : 860mV?
OSC101 Check
Pin #3 : 13MHz ?
Vpp : 950mV?
OSC101 Check
Pin #4 = 2.8V ?
U103
Change or resolder
NO
NO NO
R112,C132
resolder
OSC101
Change or resolder
YES YES YES
NO
Check soldered status of
C120,121,L108,F103
F103 Check
Pin #1 ≥-65dBm ?
Check soldered status of
C151,L149,V102
Resolder or Change
NO
YES
NO

SAMSUNG Proprietary-Contents may change without notice
SGH-E720 Flow Chart of Troubleshooting
2-14
This Document can not be used without Samsung's authorization
2-2-2. DCS RX
Continuous RX ON
RF Input : 660 CH
AMP : -50dBm
NORMAL CONDITION
Catch the channel ?
YES
NO
U106 Check
Pin #9 ≥-65dBm ?
U106 Check
Pin #1 ≥-65dBm ?
U103 Check
Pin#18,19 ≥-65dBm ?
Check soldered status of
R114,115,C152,109,L145
CN100,C108,L103
Resolder or Change
U106 Resolder or Change
U103 Check
Pin#9,32=Clean 2.8V?
U103 Check
Pin#28,1,2,3=100mV?
U401,C418,100,130
Check or resolder
Check U401
NO
NO
YES
YES
YES
YES
NO
YES
U103 Check
Pin #8 : 13MHz ?
Vpp : 860mV?
OSC101 Check
Pin #3 : 13MHz ?
Vpp : 950mV?
OSC101 Check
Pin #4 = 2.8V ?
U103
Change or resolder
NO
NO NO
R112,C132
resolder
OSC101
Change or resolder
YES YES YES
NO
Check soldered status of
C115,119,L105,F102
F102 Check
Pin #1 ≥-65dBm ? Check soldered status of
C149,148
NO
YES
NO

SAMSUNG Proprietary-Contents may change without notice
SGH-E720 Flow Chart of Troubleshooting
2-15
This Document can not be used without Samsung's authorization
2-2-3. PCS RX
Continuous RX ON
RF Input : 660 CH
AMP : -50dBm
NORMAL CONDITION
Catch the channel ?
YES
NO
U106 Check
Pin #9 ≥-65dBm ?
U106 Check
Pin #3 ≥-65dBm ?
U103 Check
Pin#16,17 ≥-65dBm ?
Check soldered status of
R114,115,C152,109,L145
CN100,C108,L103
Resolder or Change
U106 Resolder or Change
U103 Check
Pin#9,32=Clean 2.8V?
U103 Check
Pin#28,1,2,3=100mV?
U401,C418,100,130
Check or resolder
Check U401
NO
NO
YES
YES
YES
YES
NO
YES
U103 Check
Pin #8 : 13MHz ?
Vpp : 860mV?
OSC101 Check
Pin #3 : 13MHz ?
Vpp : 950mV?
OSC101 Check
Pin #4 = 2.8V ?
U103
Change or resolder
NO
NO NO
R112,C132
resolder
OSC101
Change or resolder
YES YES YES
NO
Check soldered status of
C111,113,L104,F101
F101 Check
Pin #1 ≥-65dBm ? Check soldered status of
L147,C147
NO
YES
NO
U106 Check
Pin #2 = High ? U401 Check & Change
NO
YES

SAMSUNG Proprietary-Contents may change without notice
SGH-E720 Flow Chart of Troubleshooting
2-16
This Document can not be used without Samsung's authorization
2-2-4. EGSM TX
Continuous TX ON condition
TX Power Code : 500 code Applied
CH : 62
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF. Level : 10dBm
ATT. : 20dB
C102
=3.7V?
Change U101
NO
YES
U106 Pin#9
About 2~3 dBm?
U106
Pin#10 = High? U401
Check & Change
NO
C108,CN100,L103
Check & Change
YES
U106
Check & Change
YES
Check the
Battery Block
Level of U101
Pin #20 is
1.2V?
Check
U401 TXP OK ?
U401
Check & Change
YES
YES
NO
NO NO
NO
U101 pin#11
About -5 dBm?
U101 pin#18
High ? Check U401
YES
NO
YES
U103 Check
Pin#9,32 ≥2.8V ?
U103 Check
Pin #8 : 13MHz ?
Vpp : 860mV?
OSC101 Check
Pin #3 : 13MHz ?
Vpp : 950mV?
OSC101 Check
Pin #4 = 2.8V ?
NO
YES
NO
NO NO
R112,C132
resolder
OSC101
Change or resolder
YES YES YES
NO
U401,C418,100,130
Check or resolder
U103 Pin
#4,5,6,7 = 1.7V?
YES
Change U101
Check U401
NO
YES
Level of
U106 Pin#7 is
4~5dBm ?

SAMSUNG Proprietary-Contents may change without notice
SGH-E720 Flow Chart of Troubleshooting
2-17
This Document can not be used without Samsung's authorization
2-2-5. DCS & PCS TX
Continuous TX ON condition
TX Power Code : 500 code Applied
CH : 62
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF. Level : 10dBm
ATT. : 20dB
C102
=3.7V?
Change U101
NO
YES
U106 Pin#9
About 2~3 dBm?
U106
Pin#4 = High? U401
Check & Change
NO
C108,CN100,L103
Check & Change
YES
U106
Check & Change
YES
Check the
Battery Block
Level of U101
Pin #20 is
1.2V?
Check
U401 TXP OK ? U401
Check & Change
YES
YES
NO
NO NO
NO
U101 pin#15
About -5 dBm?
U101 pin#18
High ? Check U401
YES
NO
YES
U103 Check
Pin#9,32 ≥2.8V ?
U103 Check
Pin #8 : 13MHz ?
Vpp : 860mV?
OSC101 Check
Pin #3 : 13MHz ?
Vpp : 950mV?
OSC101 Check
Pin #4 = 2.8V ?
NO
YES
NO
NO NO
R112,C132
resolder
OSC101
Change or resolder
YES YES YES
NO
U401,C418,100,130
Check or resolder
U103 Pin
#4,5,6,7 = 1.7V?
YES
Change U101
Check U401
NO
YES
Level of
U106 Pin#5 is
4~5dBm ?