Samsung SGH-E790 User manual

GSM TELEPHONE
SGH-E790
GSM TELEPHONE CONTENTS
1. Specification
2. Exploded View and Parts list
3. Chart of Troubleshooting
4. Array course control
5. Block Diagrams
6. PCB Diagrams
7. MAIN Electrical Parts List
8. Reference data
9. Safety Precautions
10. Product Function

Contents
1. Specification
1-1. GSM General Specification .......................................................................................1-1
1-2. GSM TX power class ...............................................................................................1-2
1-3. EDGE TX Power Level .............................................................................................1-3
2. Exploded View and Parts list
2-1. Cellular phone Exploded View ..................................................................................2-1
2-2. Cellular phone Parts list ............................................................................................2-2
2-3. Disassembly ...............................................................................................................2-4
2-4. Assembly ....................................................................................................................2-8
3. Chart of Troubleshooting
3-1. Baseband ............................................................................................................3-1
3-1-1. Power ON .....................................................................................................3-1
3-1-2. Initial .............................................................................................................3-4
3-1-3. SIM Part .......................................................................................................3-6
3-1-4. Microphone Part ...........................................................................................3-8
3-1-5. Speaker Part_1(MP3, SPEAKER PHONE) ..............................................3-10
3-1-6. Speaker Part_2(RECEIVER) .....................................................................3-13
3-1-7. Charging Part .............................................................................................3-14
3-2. RF ......................................................................................................................3-13
3-2-1. EGSM RX ..................................................................................................3-17
3-2-2. DCS RX .....................................................................................................3-19
3-2-3. PCS RX ......................................................................................................3-21
3-2-4. EGSM TX ...................................................................................................3-22
3-2-5. DCS/PCS TX .............................................................................................3-24

Contents
4. Array course control
4-1. Downloading Binary Files ......................................................................................4-1
4-2. Pre-requsite for Downloading ................................................................................4-1
4-3. S/W Downloader Program .....................................................................................4-2
4-4. How to Download ...................................................................................................4-2
5. Block Diagrams
5-1. RF Solution Block Diagram ......................................................................................5-1
5-2. Base Band Solution Block Diagram .........................................................................5-2
6. PCB Diagrams
7. MAIN Electrical Parts List
8. Reference data
8-1. Reference Abbreviate ..............................................................................................8-1
9. Safety Precautions
9-1. Repair Precaution ......................................................................................................9-1
9-2. ESD(Electrostaically Sensitive Devices) Precaution ................................................9-2
10. Product Function

SAMSUNG Proprietary-Contents may change without notice
1. Specification
This Document can not be used without Samsung's authorization
1-1
1-1. GSM General Specification
EGSM900 DCS1800 PCS1900
Freq. Band[MHz]
Uplink/Downlink
880~915
925~960
1710~1785
1805~1880
1850~1910
1930~1990
ARFCN range 0~124&
975~1023 512~885 512~810
Tx/Rx spacing 45 MHz 95 MHz 80 MHz
Mod. Bit rate/
Bit Period
GPRS 270.833 Kbps
3.692 us
270.833 Kbps
3.692 us
270.833 Kbps
3.692 us
EDGE 812.5 Kbps
3.692 us
812.5 Kbps
3.692 us
812.5 Kbps
3.692 us
Time Slot Period/Frame
Period
576.9 us
4.615 ms
576.9 us
4.615 ms
576.9 us
4.615 ms
Modulation
GPRS 0.3 GMSK 0.3 GMSK 0.3 GMSK
EDGE 8 PSK 8 PSK 8 PSK
MS Power
GPRS 33 dBm~5 dBm 30 dBm~0 dBm 30 dBm~0 dBm
EDGE 27~5 dBm 26~0 dBm 26~0 dBm
Power Level
GPRS 5~19(class4) 0~15(class1) 0~15(class1)
EDGE 8~19(class E2) 2~15(class E2) 2~15(class E2)
Sensitivity -102 dBm -100 dBm -102 dBm
TDMA Mux 8 8 8
Cell Radius 35 Km 2 Km 2 Km

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Specification
1-2
This Document can not be used without Samsung's authorization
1-2. GSM TX power class
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±4 dBm
11 8±4 dBm
12 6±4 dBm
13 4±4 dBm
14 2±5 dBm
15 0±5 dBm
TX
Power
control
level
PCS1900
0 30±3 dBm
1 28±3 dBm
2 26±3 dBm
3 24±3 dBm
4 22±3 dBm
5 20±3 dBm
6 18±3 dBm
7 16±3 dBm
8 14±3 dBm
9 12±4 dBm
10 10±4 dBm
11 8±4 dBm
12 6±4 dBm
13 4±4 dBm
14 2±5 dBm
15 0±5 dBm
TX
Power
control
level
EGSM900
5 33±2 dBm
6 31±2 dBm
7 29±2 dBm
8 27±2 dBm
9 25±2 dBm
10 23±2 dBm
11 21±2 dBm
12 19±2 dBm
13 17±2 dBm
14 15±2 dBm
15 13±2 dBm
16 11±2 dBm
17 9±2 dBm
18 7±2 dBm
19 5±2 dBm

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Specification
1-3
This Document can not be used without Samsung's authorization
1-3. EDGE TX Power Level
TX
Power
control
level
DCS1800
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
226±3dBm
324±3dBm
422±3dBm
520±3dBm
618±3dBm
716±3dBm
814±3dBm
912±4dBm
10 10±4 dBm
11 8±4 dBm
12 6±4 dBm
13 4±4 dBm
14 2±5 dBm
15 0±5 dBm
TX
Power
control
level
EGSM900
827±3dBm
925±3dBm
10 23±3 dBm
11 21±3 dBm
12 19±3 dBm
13 17±3 dBm
14 15±3 dBm
15 13±3 dBm
16 11±5 dBm
17 9±5 dBm
18 7±5 dBm
19 5±5 dBm

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2. Exploded View and Parts List
2-1
This Document can not be used without Samsung's authorization
2-1. Cellular phone Exploded View
QBA00
QFR01
QVO01
QSD01
QKP01
QMP01
QAN02
QRE01
QCR05
QVK01
QME01
QIF01
QCA01
QMW01
QLC01
QFU01
QSP01
QMO01
QHI01
QFL01
QMI03
QMI01
QCR05
QBA01
QCK01
QCA02
QAN05
QSC05
QSC06
QBR05
QLB01

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Exploded View and Parts List
2-2
This Document can not be used without Samsung's authorization
Design LOC Discription SEC CODE
QAN02 INTENNA-SGHE790 GH42-00981A
QAN05 ASSY MEC-INTENNA CONTACT GH75-08168A
QBA00 PMO-COVER BATT GH72-34003A
QBA01 INNER BATTERY PACK-800MAH,BLK, GH43-02644A
QCA01 UNIT-CAMERA GH59-03723A
QCA02 UNIT-CAMERA KEY FPCB GH59-03666A
QCK01 PMO-SIDE KEY CAMERA GH72-34006A
QCR05 SCREW-MACHINE 6001-001478
QCR05 SCREW-MACHINE 6001-001478
QKP01 ASSY KEYPAD-MAIN(SER/OS) GH98-03264A
QME01 UNIT-DOMESHEET GH59-03664A
QMI01 MICROPHONE-ASSY-5.25MM GH30-00178C
QMI03 RMO-RUBBER MIC GH73-07953A
QMO01 MOTOR DC-SGHZ130 GH31-00154C
QMP01 PBA MAIN-SGHE790 (PBA MAIN) GH92-02977A
QRE01 ASSY CASE-REAR GH98-02157A
QSC05 RMO-RUBBER F/L SCREW L GH73-07951A
QSC06 RMO-RUBBER F/L SCREW R GH73-07952A
QSP01 SPEAKER 3001-002052
QVK01 UNIT-VOLUME KEY FPCB GH59-03645A
QVO01 PMO-SIDE KEY VOLUME GH72-34007A
QLC01 ELA UNIT-SGHE790 LCD MODULE GH96-02272A
QMW01 ASSY COVER-MAIN WINDOW GH98-02256A
QFU01 ASSY CASE-FOLDER UPPER GH98-02156A
QLB01 ASSY BRACKET-LCD GH98-02159A
QFL01 ASSY CASE-FOLDER LOWER GH98-02155A
QHI01 ASSY MEC-HINGE(CAN TYPE) GH75-04662A
QBR05 ASSY CASE-BRACKET LOWER GH98-03619A
QFR01 ASSY CASE-FRONT GH98-02154A
QIF01 PMO-COVER IF EARJACK GH72-34004A
QSD01 PMO-COVER MICRO SD GH72-34005A
2-2. Cellular phone Parts list

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Exploded View and Parts List
2-3
This Document can not be used without Samsung's authorization
Discription SEC CODE
BAG PE 6902-000297
CBF INTERFACE-DATA LINK CABLE GH39-00444B
ADAPTOR-SGHE690,SIL,EU,A_TYPE GH44-01361B
S/W CD-SGHE790 PC STUDIO 3.1 GH46-00366A
UNIT-EARPHONE,SGHZ370,SIL,A-TY GH59-03679B
LABEL(P)-WATER SOAK GH68-02026A
LABEL(P)-WATER SOAK GH68-02026A
MANUAL-SFC GH68-04336A
LABEL(P)-BARCODE RUSSIA GH68-08494A
MANUAL USERS-EU RUSSIAN GH68-13125A
LABEL(R)-MAIN(SER) GH68-13217B
BOX(P)-UNIT MAIN(SER) GH69-04786B
CUSHION-CASE TA2 MA2 GH69-04787A
MPR-REMOVE TAPE LCD GH74-13804A
MPR-TAPE LED GH74-17926A
MPR-TAPE MAIN LDI GH74-19992A
MPR-GASK TAPE GH74-21836A
MPR-VINYL BOHO MAIN WINDOW GH74-22341A
MPR-VINYL BOHO F/L A GH74-26477A
MPR-VINYL BOHO F/U C GH74-26478A
MPR-TAPE GH74-27509A
MPR-GASK TAPE GH74-27520A
MPR-INSU TAPE LCD TOP GH74-27523A
MPR-TAPE FRONT NET GH74-27542A
MPR-INSU TAPE GH74-27955A
MPR-INSU TAPE GH74-27956A
MPR-INSU TAPE GH74-28242A
MPR-SPONGE GH74-29421A
MPR-INSU TAPE LED A GH74-29821A

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Exploded View and Parts List
2-4
This Document can not be used without Samsung's authorization
2-3. Disassembly
1
43
2
1) Disassemble the LCD CONNECTOR
2) Disassemble the PBA from the FRONT ASS'Y
3) Remove the DUST TAPE
4) Disassemble the Keypad.
※caution
1) When PBA is separated from LCD Connector,
Be careful not to damage!
2) Be careful not to damage LCD FPCB!
1) Push the hinge between Folder Upper and lower,
And Disassemble Front from Folder.
※caution
1) Be careful not to make scratch and molding
damage!
2) Be careful not to damage LCD FPCB!
1) Unscrew the REAR at the four points.
2) Disassemble the IF COVER
※caution
1) Be careful not to make scratch and molding
damage!
1) Disassemble the Rear from the bottom side
to the upper side.
※caution
1) Be careful not to make scratch and molding
damage!
PULL OUT
"FRONT
CASE"
PULL OUT
"FRONT
CASE"

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Exploded View and Parts List
2-5
This Document can not be used without Samsung's authorization
5
7
6
1) Disassemble the MOTOR and the SPEAKER
from FOLDER LOWER by using a pincette.
※caution
1) Be careful not to make scratch and molding
damage!
2) Do not use the speaker bonding part at
disassembling speaker (Only use marking point)
1) Remove screw caps.
2) Unscrew the FOLDER Upper.
※caution
1) Be careful not to make scratch and molding
damage!
1) By using an assembly stick, Disassemble
Folder Upper from Folder lower
(Right and Left are the same process)
※caution
1) Be careful not to make scratch and molding
damage!
2) Be careful not to damage LCD FPCB!
SCREW CAP POINTS PULL OUT "UPPER CASE"

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Exploded View and Parts List
2-6
This Document can not be used without Samsung's authorization
2-4. AssemblY
1
43
2
1) Assemble FOLDER UPPER with FOLDER LOWER
following the orders as above picture is
shown.
※caution
1) Be careful not to make scratch and molding damage!
1) Screw up the FOLDER UPPER at the above
two points.(M1.4xL3)
※caution
1) Be careful not to make scratch and molding damage!
2) Torque 1.1 ~ 1.3 kgf.cm
1) Solder SPEAKER & MOTOR to LCD.
2) Bond on the soldering place
※caution
1) Be careful not to make scratch and molding damage!
1) Insert FPCB into FOLDER LOWER.
2) Attach Speaker and Motor.
※caution
1) Be careful not to make scratch and molding damage!
2) Be careful not to damage LCD FPCB!
Arrange Wires clearly on
SPEAKER and MOTOR !
<1>
<2>
<3>

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Exploded View and Parts List
2-7
This Document can not be used without Samsung's authorization
5
87
6
1) Attach Screw rubber caps on the screws
by using a pincette.
※caution
1) Be careful not to make scratch and molding
damage!
2) Be sure to push the rubbers.
1) Insert LCD FPCB[which is connected to
FOLDER] into the bottom of FRONT Hinge.
2) The FOLDER's projection inserts the
FRONT'SholewhenProjectionispushed
3) Assemble FOLDER with FRONT
※caution
1) Be careful not to make scratch and molding
damage!
1) Insert the KEYPAD.
※caution
1) Be careful not to insert keypad into FRONT
incorrectly![Put KEYPAD Holes into FRONT
Projection correctly!]
2) Be careful not to damage LCD FPCB!
1) Attach FRONT Dust TAPE as a above
picture is shown.
※caution
1) Be careful not to make scratch and molding
damage!
Attach FRONT Dust
TAPE

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Exploded View and Parts List
2-8
This Document can not be used without Samsung's authorization
9
1211
10
1) Insert PBA into FRONT.
2) Connect LCD FPCB to PBA CONNECTOR.
※caution
1) Be careful not to damage LCD FPCB!
2) Be careful not to damage PBA
1) Insult the Side key and Camera key as
the above picture is shown.
※caution
1) Be sure the direction of side key
1) Assemble the rear from 1 direction to 2
direction as the above picture is shown.
※caution
1) Be careful not to make scratch and molding
damage!
1) Screw up the REAR at 4 Points.
[M1.4* L3]
※caution
1) Torque 0.8 ± 0.1 Kgf/㎠
2) Be careful not to make scratch and molding
damage!
Be sure the direction.
1
2

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3. Flow Chart of Troubleshooting
3-1
This Document can not be used without Samsung's authorization
3-1.Baseband
3-1-1. Power ON
'Power On' does not work
Voltage >=3.3V
Download again
Charge the Battery
Pin#D6 >= 2.8V Check U100 and C117
Pin#E14 and
pin#F3>=2.8V Check U100
Freq = 26MHz
Vrms >=300mV
Vpp≒900mV
Check the clock generation circuit
(related to 3pin of TCX400, C404, R402)
Check the initial operation
END
No
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
pin#A6 = 1.8V No
Yes
Check the current consumption
Check the Vbat Voltage
Check the pin of U100
ChecktheclocksignalatR404
Current consumption
>= 100mA
①
③
④
①

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Flow Chart of Troubleshooting
3-2
This Document can not be used without Samsung's authorization
C106
8
3
1
C
2
1
1
R
7
3
1
C
8
_
2
_
N
Y
S
V
9
1
1
C
3
0
1
C
VCCA_2_8
8
_
1
_
T
B
V
L100
6
3
1
C
VRF_2_8
VCCA_2_8
3
R
N
T
E
S
E
R
4
R
SYSCLKEN R6
P4
O
_
T
E
S
E
R
5
P
P
E
E
K
_
R
W
P
6
P
C
S
P
_I
D
S
0
1
R
N
_
T
U
O
_
O
N
O
M
_
O
L
2
1
R
HI_MONO_OUT_N
R13
HI_MONO_OUT_P
R14
N
E
X
T
X
R
2
R
K
L
C
_
C
T
R
CNTL_EN_CSP
N9 CNTL_DAT_CSP
P1
C
S
P
_
K
L
C
S
0
1
P
P
_
T
U
O
_
O
N
O
M
_
O
L
1
1
P
P12
USB_CARKIT_D_P
USB_CARKIT_D_N P13
VDDSPKR
P15
B
T
S
U
C
S
3
P
VDD_IO
VDD
N12
R
K
P
S
D
N
G4
1
N
N
_
T
U
O
_
O
N
O
M
5
1
N
A
T
A
D
X
T
X
R
2
N
4
NN
A
C
S
K
L
C
_
P
u5
N
SYSCLK N6
AINT
N7
M2 AOCTL0
M3
T
S
R
_
P
u6
M
VDD
M7
9
MC
S
P
_
O
D
S
VDD
N1
VDDD
N10
D
D
N
G1
1
N
L7
VDD_IO
L8
DINT
L9
L
T
C
O
A
_
D
N
G1
M
CSN_PSC
M10
R
_
T
U
O
_
O
E
R
E
T
S
3
1
ML
_
T
U
O
_
O
E
R
E
T
S
4
1
M
V
D
N
G5
1
M
AOCTL1
0
1
L
VDDV
L11
P
_
T
U
O
_
O
N
O
M
3
1
L
VAVCM L14
AOCTL3
L2 AOCTL2
L3
TXPSTB L5
O
I
_
P
u6
L
VIB_RNG_EN
K2
N
Q
X
T
X
R
3
K
P
Q
X
T
X
R
4
K
VDD_AOCTL
K5
VSS K6
CNTL_CLK_CSP
K7
VSS K8
VSS K9
F
U
B
_
1
W
S
P
9
J
B
D
N
G1
K
VAMICRTN K10
VAVCMRTN K11
VAREF K12
VAMICREF K13
R
_
N
I
_
1
O
E
R
E
T
S
4
1
KL
_
NI
_
1
O
E
R
E
T
S
5
1
K
VDDB
2
1
J
P
_
N
I
_
1
O
N
O
M
3
1
J
PI
X
T
X
R
3
JNI
X
T
X
R
4
J
1
F
E
R
A
R
5
J
3
F
E
R
A
R
6
J
S
D
N
G7
J
S
D
N
G8
J
S
D
N
G
1
1
H
TXP H5
2
F
E
R
A
R
6
H
S
D
N
G7
H
S
D
N
G8
H
S
D
N
G9
H
S
D
N
G0
1
J
VAREFRTN J11
P
_
N
I
_
3
O
N
O
M
|
R
_
N
I
_
2
O
E
R
E
T
S
3
G
C
T
R
1
X4
G
AFC
G5
S
D
N
G6
G
S
D
N
G7
G
S
D
N
G8
G
S
D
N
G9
G
S
D
N
G0
1
H
N
_
NI
_
3
O
N
O
M|
L
_
NI
_
2
O
E
R
E
T
S
6
F
S
D
N
G7
F
S
D
N
G8
F
S
D
N
G9
F
S
D
N
G0
1
G
P
_
NI
_
2
O
N
O
M
1
1
GN
_
NI
_
2
O
N
O
M
2
1
G
N
_
N
I
_
1
O
N
O
M
3
1
G
C
T
R
2
X
F12
H
S
L
M
C
V
A
V
3
1
F
D
_
B
_
C
I
M
4
1
F
C
S
P
_
D
N
G5
1
F
VREF F2
VRFLDO_2 F3
Q
D
N
G4
F
VRTC F5
S
D
N
G
5
E
OI
_
MI
S
6
E
R
U
C
H
_
D
N
G7
E
V
R
D
_
G
NI
R
8
E
VIB_DRV E9
CREF
F1
S
D
N
G0
1
F
S
D
N
G1
1
F
VLDO_AUX1
D7
LED3_DRV
D9
S
D
N
G0
1
E
VBATAUX E11
VBATAUD E13
VLDO_AUD E14
VBATRF E2
VRFLDO_1 E3
2
W
S
_
R
W
P
D1
HV_CHRG
D10
VLDO_COREC D13
D14
VLDO_AUX2
VDD1BC
D15
ADC_AUX9
D2
C
N3
D
VLDO_2 D6
LED1_DRV
C14
VLDO_COREA C15
ADC_AUX7
C2
N
1
W
S
_
R
W
P
4
C
VSIM C5
VBAT12 C6
LED2_DRV
C7
VACC C9
ADC_AUX8
B3 ADC_AUX2
B4
T
S
R
_
M
I
S
5
B
K
L
C
_
M
I
S
6
B
ADC_AUX6
C1
USB_CHRG C10
C
S
P
_
D
N
G1
1
C
VLDO_COREB C12
VDD1A
A4
VLDO_1 A6
ADC_AUX5
B1
VBAT B10
BATKELV
B11
FBSW
B12
LX
B13
VLDO_COREA_S B15
ADC_AUX3
1
C
N2
R
U
C
H
_
D
N
G0
1
A
VEXT_5 A12
W
S
_
D
N
G3
1
A
VBATSW A14
ADC_AUX4
A2
C
S
P
_
D
N
G3
A
ADC_AUX1
U100
G-AVX115C-161F-LDT
C
N
44
5
5
66
G
78
GG
910
G
SIM102
11
22
33
C112
R102
OSC100
5
1
1
C
C128
U102
6
1
1
C
VCCD_1_8
8
_
2
_
A
C
C
V
R103
2
3
1
C
R105
C127
8
_
1
_
D
C
C
V
8
1
1
C
C139
C111
C125
7
1
1
C
C113
C108
0
3
1
C
BAT100
RB414_IV02N
2
NEG
1
POS
1
1
1
R
B
2
_
1
_
D
C
C
V
3
2
1
C
VCCD_2_9 VCCD_1_8
1
2
1
C
4
2
1
C
VBAT
A
2
_
1
_
D
C
C
V
C
2
_
1
_
D
C
C
V
8
_
2
_
F
R
V
R107
0
2
1
C
2
0
1
C
C105
1
3
1
C
8
_
2
_
D
S
V
3
3
1
C
VBAT
VCCD_2_9
C109
R104
C107
9
_
2
_
D
C
C
V
VCCD_1_2A
2
2
1
C
0
0
1
C
5
3
1
C
ICHRG
P
_
NI
_
3
O
N
O
MN
_
NI
_
3
O
N
O
M
CLK_REQ
AFC
PA_GND
PA_GND
CNTL_EN_CSP
CNTL_DAT_CSP
SCLK_PSC
P
_
T
U
O
_
O
N
O
M
_
O
L
SCUSTB
RESET
P
E
E
K
_
R
W
P
SDI_PSC
N
_
T
U
O
_
O
N
O
M
_
O
L
HI_MONO_OUT_N
HI_MONO_OUT_P
RXTXEN
K
L
C
_
C
T
R
FLASH_RESET
F
U
B
_
1
W
S
P
P
_
T
U
O
_
O
N
O
M
TXPSTB
SIMDATA
DINT
CSN_PSC
R
_
T
U
O
_
O
E
R
E
T
S
L
_
T
U
O
_
O
E
R
E
T
S
SIMRST
SDO_PSC
N
_
T
U
O
_
O
N
O
M
RXTXDATA
SIMCLK
26MHZ_ABB
AINT
P
_
N
I
_
2
O
N
O
M
N
_
NI
_
2
O
N
O
M
N
_
N
I
_
1
O
N
O
M
VAPC
P
_
N
I
_
1
O
N
O
M
TRXIP
TRXIN
VAMICREF
TRXQN
TRXQP
CNTL_CLK_CSP
KEY_BL_2
KEY_BL_1
N
O
_
G
I
J
MOTOR_EN
PA_GND
DCDC_OUT
DCDC_OUT
N
O
_
R
W
P
R400
10
C404
C407
C406
R402
R404
VSYN_2_8
C409
2
D
N
G
T
U
O
4
3
C
C
V
N
O
C
V
1
TCX400
26M_REF_CLK 26MHZ_DBB
AFC
CLK26M_RF

SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
3-3
This Document can not be used without Samsung's authorization
③
④
①

SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
3-4
This Document can not be used without Samsung's authorization
3-1-2. Initial
Initial Failure
Thepin#A6ofU101=
1.8V and
the pin #D6 of U101 =
2.8V ?
Check the U100
(if it has some problem, it is to be replaced.)
Yes
No
Is the pin #P5 of U100
"Low →High" ?
Yes
No Check the U100
(if it has some problem, it is to be replaced.)
There is 32.768kHz wave
forms at the C106 and
C105
Yes
No
The voltage is "High" at
the C120,C121,C122
LCD display is O.K?
No
Yes
Yes
Yes
Check the LCD part
No
Sound is O.K?
Yes
No
Check the Audio part
END
Yes
①
①
Check the U100
①
Check the U100
①

SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
3-5
This Document can not be used without Samsung's authorization
①

SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
3-6
This Document can not be used without Samsung's authorization
3-1-3. Sim Part
Check the voltage at
pin#1 of SIM100 >=
2.8V ?
"Insert SIM is displayed on the LCD
Check the SIM
connector's (SIM100)
connection to SIM card
Check the U100
Resolder or change SIM100
END
No
Yes
Yes
Yes
Yes
No
No
Is there any signals
pin#2,#3,#4 of ? Check the UCP201
Check the SIM Card
①
②
③
8
3
1
C
7
3
1
C
6
3
1
C
44
5
5
66
G
78
GG
910
G
SIM102
11
22
33
C139
5
3
1
C