Samsung SGH-S720i User manual

GSM TELEPHONE
SGH-S720i
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
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 ...............................................................................................................2-9
2-4. Assembly ..................................................................................................................2-11
3. ChartofTroubleshooting
3-1. Baseband ............................................................................................................3-1
3-1-1. Power ON .....................................................................................................3-1
3-1-2. System Initial ................................................................................................3-5
3-1-3. SIM Part .......................................................................................................3-8
3-1-4. Charging Part .............................................................................................3-10
3-1-5. Microphone Part .........................................................................................3-12
3-1-6. Speaker Part ..............................................................................................3-15
3-1-7. Camera Part ..............................................................................................3-18
3-1-8. LCD .............................................................................................................3-21
3-2. RF ......................................................................................................................3-13
3-2-1. EGSM Rx ...................................................................................................3-23
3-2-2. DCS Rx ......................................................................................................3-24
3-2-3. PCS Rx ......................................................................................................3-25
3-2-4. EGSM Tx ...................................................................................................3-27
3-2-4. DCS &PCS Tx .........................................................................................3-28
3-2-6. BLUETOOTH ..............................................................................................3-30

Contents
4. Array course control
4-1. Downloading Binary Files ......................................................................................4-2
4-2. Pre-requsite for Downloading ................................................................................4-2
4-3. S/W Downloader Program .....................................................................................4-3
5. Block Diagrams
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

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1. Specification
1-1
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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 45 MHz 45 MHz 95 MHz 80 MHz
Mod. Bit rate/
Bit Period
270.833 kbps
3.692 us
270.833 kbps
3.692 us
270.833 kbps
3.692 us
270.833 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
576.9 us
4.615 ms
Modulation 0.3 GMSK 0.3 GMSK 0.3 GMSK 0.3 GMSK
MS Power 33 dBm~13 dBm 33 dBm~5 dBm 30 dBm~0 dBm 30 dBm~0 dBm
Power Class 5 pcl ~ 15 pcl 5 pcl ~19pcl 0pcl ~15pcl 0pcl ~15pcl
Sensitivity -102 dBm -102 dBm -100 dBm -100 dBm
TDMA Mux 8 8 8 8
Cell Radius 35 Km 35 Km 2 Km -

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Specification
1-2
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1-2. GSM TX power class
TX Power
control level GSM900
533±2
dBm
631±2
dBm
729±2
dBm
827±2
dBm
925±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±3 dBm
17 9± 3dBm
18 7±3 dBm
19 5±3 dBm
TX Power
control level DCS1800
030±3
dBm
128±3
dBm
226±3
dBm
324±3
dBm
422±3
dBm
520±3
dBm
618±3
dBm
716±3
dBm
814±3
dBm
912±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 PCS1900
030±3
dBm
128±3
dBm
226±3
dBm
324±3
dBm
422±3
dBm
520±3
dBm
618±3
dBm
716±3
dBm
814±3
dBm
912±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

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2. Exploded View and Parts List
2-1
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2-1. Cellular phone Exploded View
QFU01
QRF03
QVO01
QCR05
QBA00
QCR61
QCR71
QKP02
QMO01
QSP01
QCA01
QLC01
QME02
QMP02
QFL01
QHI02
QHI01
QCR05
QSC05
QBA01
QCR05
QRE01
QCK02
QSD01
QAN02
QSD07
QSH01
QAN12
QMI03
QMI01
QMP01
QME01
QCR05
QPC01
QKP01
QFR02
QKP01QKP01QKP01
QFR01 QFL01 QFR02
+
=

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Main Electrical Parts List
2-2
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Design LOC Discription STATUS
QAN02 INTENNA-SGHS720I GH42-01281A
QAN12 ASSY-CUSHION-INTENNA CONTACT RGH98-00966A
QBA00 PMO-COVER BATTERY GH72-38382A
QBA01 INNER BATTERY PACK-800MAH,BLK, GH43-02644A
QCA01 UNIT-CAMERA,S720I GH59-04352A
QCK02 PMO-KEY POWER GH72-38379A
QCR05 SCREW-MACHINE 6001-001478
QCR05 SCREW-MACHINE 6001-001478
QCR05 SCREW-MACHINE 6001-001478
QCR71 SCREW-MACHINE 6001-002095
QFU01 ASSY CASE-SLIDE UPPER GH98-04049A
QKP01 ASSY KEYPAD-MAIN(XEF/SB) GH98-04140A
QKP02 ASSY KEYPAD-SUB(XEF/SB) GH98-04141A
QLC01 ELA UNIT-SGHX530 LCD MODULE GH96-02314A
QME01 DOME SHEET-TF DOME SHEET 12 KE GH59-04351A
QME02 AS-NAVY DOMESHEET SVC,S720I GH81-06671A
QMO01 MOTOR DC-SGHS720I GH31-00334A
QMP01 PBA MAIN-SGHS720I GH92-03514A
QMP02 ASSY ETC-LCD SUB PBA GH59-04356A
QPC01 MEA-SLIDE FPCB KIT GH97-07781A
QSC05 RMO-LOWER COVER SCREW CAP GH73-09431A
QSD07 ASSY ETC-SIM SOCKET FPCB,S720I GH59-04362A
QSH01 ASSY CASE-SHELDE CAN GH98-04302A
QSP01 SPEAKER 3001-002144
QVO01 PMO-KEY VOLUME GH72-38378A
QMI01 MICROPHONE-ASSY-SGH-S720I GH30-00360A
QMI03 AS-MIC HOLDER SVC.S720I GH81-06664A
QFR01 ASSY CASE-FRONT SLIDE LOWER GH98-05614A
QCR61 SCREW-MACHINE 6001-002008
QFL01 ASSY CASE-SLIDE LOWER GH98-04054A
QFR02 ASSY CASE-SLIDE FRONT GH98-04055A
QHI01 ASSY CASE-HINGE MODULE GH98-04300A
QHI02 ASSY HINGE-LINK GH98-05837A
QRE01 ASSY CASE-SLIDE REAR GH98-04056A
QSD01 PMO-COVER SD GH72-38380A
QRF03 PMO-COVER EAR GH72-38381A
2-2. Cellular phone Parts list

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Main Electrical Parts List
2-3
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Discription STATUS
BAG PE 6902-000297
ADAPTOR-SGHE690,BLK,EU,A_TYPE GH44-01361A
EARPHONE-EARPHONE,20P,B-TYPE GH59-03883A
LABEL(R)-WATER SOAK GH68-09361A
LABEL(R)-MASTER_FANCE_BOG GH68-13691B
MANUAL USERS-BOG FRENCH GH68-14582A
LABEL(R)-MAIN XEF GH68-15299G
BOX(P)-UNIT MAIN(EU) GH69-05581A
CUSHION-CASE(EU) GH69-05587A
MPR-REMOVE TAPE LCD GH74-13804A
MPR-SUB CON INSLATION GH74-15319A
MPR-TAPE PCB ESD 1GH74-15507A
MPR-GASKET PCB CGH74-18278A
MPR-TAPE MAIN FPCB GH74-20124A
MPR-TAPE MAIN FPCB GH74-20124A
MPR-INSU TAPE GH74-28241A
MPR-TAPE SHEET EARJACK GH74-31132A
MPR-TAPE SHEET SD GH74-31134A
VINYL-BOHO MAIN KEY GH74-32384A
VINYL-BOHO MP3 DGH74-32937A
TAPE-SHIELD CAN CON GH74-33006A
TAPE GH74-33007A
TAPE GH74-33341A
AS-SUB DOME SHEET TAPE SVC,S72 GH81-06672A
AS-ELEC TAPE LCD MODULE SVC,S7 GH81-06673A
AS-TAPE LCD BOT SVC,S720I GH81-06674A

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Main Electrical Parts List
2-4
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2-3. Disassembly
1
3
2
4
1) Remove the VOLUME, POWER KEY.
2) Disconnect the SIM CONNECTOR.
1) Unscrew the 4point REAR Screws.
2) Extract the IF COVER.
※Caution
1) Be careful not to scratch the appearance.
1) Remove the ①② tapes of Rear.
2) Dissolve the READ LOCKER.
※Caution
1) Be careful not to scratch the appearance or
damage the framework.
1) Unlock the MAIN B'D LOCKER of lower part
first, then unlock the other part.
※Caution
1) The slide should be open when dissolving the
MAIN PBA.
2) Be careful not to cut off the slide FPCB when
dissolving the MAIN PBA.
①
②
②
③④
①
③
①
②

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Main Electrical Parts List
2-5
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5 6
1) Dissolve the MAIN PBA from the main frame.
※Caution
1) Take precaution not to cut off the slide FPCB.
1) Remove the protection tape.
2) Remove the left and right SOLDER, then
dissolve the F-PCB.
※Caution
1) Take precaution not to cut off the slide FPCB.
7 8
1) Unscrew the 4point SCREWs.
※Caution
1) Be careful not to scratch the appearance.
1) Unlock the LOCKER in numerical order from ①
to ④.
※Caution
1) Take precaution not to damage the F-PCB.
①
②
①
②
③
④

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Main Electrical Parts List
2-6
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910
1) Removetheprotectiontapeonthetouchkey
connector.
※Caution
1) Be careful not to damage the slide F-PCB.
11
1) Seperate the PBA ASS'Y from LCD frame.
①①
②
③
※Caution
1) Disconnect the touch key connector.
2) Detach the MOTOR ,SPEAKER, CAMERA.
3) Check the unlock of LOCKER and seperate the
PBA from LCD.

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Main Electrical Parts List
2-7
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1
3
2
2-4. Assembly
1) LCD PBA
1) Correspond the LCD module FPCB to guide
holes.
2) Solder the LCD PBA and LCD FPCB together.
3) Attach the protection tape on LCD FPCB
soldering.
1) Remove the release papers as shown in
Figure ①.(3 points)
2) Check correspondence of 4points after
assembling LCD to PBA as shown in Figure ②.1) Solder LCD BACKLIGHT FPCB.
4
①
②
③
Check
correspondence of
4points.
①②

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Main Electrical Parts List
2-8
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5
7
6
1) Solder the motor and speaker.
Confirm direction of parts and polarity before
soldering.
1) Work bonding operation in WIRE SOLDER area.
2) Attatch the both-sided electric conduction tape.
1) Insert the slide F-PCB and touch key
F-PCB to the each connector.
2) Attach the protection tape on the touch-
key connector.
※Caution
Insert each F-PCB exactly to the each connector.
8
①
②
①
②
1) Put the F-PCB into theholeofmainframe
as the slide is down.
※Caution
Take precaution not to damage the F-PCB.

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Main Electrical Parts List
2-9
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9
10 11
①
②
③
④
⑤
1) Lay the LOCKER of LCD PBA on top of LOWER, assemble the LOCKERS.
2) Lock the other LOCKERS as followed pictures of ③,④,⑤.
※Caution
-Assemble the UPPER and FRONT when slide is open.
-Take serious precaution when locking ①.
-Be careful not the slide F-PCB to be fold.
Identification line to
check FPCB insertion.
1) Screw the 4point screws.
2) Put the screw cover on top of screws in upper
side.
1) Inserting slide F-PCB and soldering
※Caution
-Make sure to check the Slide F-PCB insertion
exactly.
-Solder right and left F-PCB not the slide F-PCB
connector to move.

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Main Electrical Parts List
2-10
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12
1) Attach the protection tape on slide F-PCB CONNECTOR.
※Caution
1) Attach the tape exactly based on the silk line.
13
Refernce Silk line
to attach the tape.
①
KEYPAD
Guide pole
①②
③
④
1) Assemble KEYPAD
2) Guide the upper side.
3) Put the MIC into MIC hole.
4) Assemble the PBA and lock.
※Caution
1) Be careful not KEYPAD to move and to put the MIC into MIC hole.

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Main Electrical Parts List
2-11
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14 15
1) Make sure the LOCKERS is locked exactly.
Lock the REAR LOCKERS in numerical
order from ①to ⑥.The "tick-tack" sound
comes when locking exactly.
①
②③
⑤
④
⑥
16 17
4points of screws earjack tape
SD connector tape
1) Screw the 4point screws.
1) Attach the EARJACK /SD connector tapes.
※Caution
1) Attach tapes in the guide line.
1) LOCK PBA Right
2) LOCK PBA Left
3)&4) Insert POWER/VOLUME KEY
※Caution
1) Repeat slide open and close so that the F-PCB
could be right position in the main frame.

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Main Electrical Parts List
2-12
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18
1. Remove the protection tape on conduction tape of LCD MODULE.
2. Insert LCD FPCB into connector with lined up with guide silk

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3-1
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3. Chart of Troubleshooting
3-1.Baseband
3-1-1. Power ON
'Power On' dose not work
Check the current
consumption more than
100mA
Check the
Vbat more than 3.3V
Check the VCORE_1.5V ≥1.5V
and VCCD_1.8V_E ≥ 1.8V
Check VCCD_1.6V and
VCCD_1.8V of U303
Check VRF_2.9V of
UCD300 and U100
Check Pin #8 of RFT100
Freq=13Mhz, Vpp>0.4V
Check the initial
operation
END
Download again
Change the Battery
Check UCP300 and C316 and C314
Check C329 and C328 of U303
Check UCD300 and C310 and C139
Check RFT100 and C133
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO

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Flow Chart of Troubleshooting and Circuit Diagrams
3-2
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Flow Chart of Troubleshooting and Circuit Diagrams
3-3
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C122
C109C108
_SEN
5
D
D
V
17
6
D
D
V
10
VIO
0
3VI
D
X
6
3N
E
X
E
D
O
M
X
9
2
8
XOUT
5
31
L
A
T
X
4
32
L
A
T
X
_PDN
19
_RES 9
1
RFIPN
21
20 RFIPP
18
P
H
O
F
R
P
L
O
F
R
15
SCLK 3
SDIO 2
3
31
D
D
V
2
32
D
D
V
12
3
D
D
V
11
4
D
D
V
16
1
D
N
G
9
31
C
N
8
32
C
N
NI
P
M
A
R
13
T
U
O
P
M
A
R
14
RFIAN
27
RFIAP
26
RFIDN
23
22 RFIDP
25 RFIEN
24 RFIEP
RFT100
C
F
A
1
3
6
BIN
BIP 7
BQN 4
5
BQP
GND
28
7
3
VRF_2.9V
VCCB_2.9V
C129
U510
C103
OSC100
2
43
1
VCCD_2.9V
C130
VCCB_2.9V
C124
VRF_2.9V
R104
C131
C100
C123
C153
C113
C112
R103
25V
C128
GSM_LNA_IN_N
DCS_LNA_IN_P
DCS_LNA_IN_N
RF_EN
PCS_LNA_IN_P
PCS_LNA_IN_N
GSM_LNA_IN_P
AFC
CLK13M_OUT
SBST
XOENA
VAPC
RTX_Q_P
VPC
DPCS_PAM_IN
GSM_PAM_IN
SBCK
SBDT
RTX_I_N
RTX_I_P
RTX_Q_N
C135
C133
R105
C139
VRF_2.9V
NC
5
NC
6
VCC
Y4
U100
2A
GND
3
1
R107
C141
R108
C138
CLK13M_YMU800
CLK13M_CSP
CLK13M_HPE
CLK13M_OUT
CLK13M_YMU765