Samsung GT-B3740 User manual

GSM TELEPHONE
GT-B3740
1. Safety Precautions
2. Specification
3. Product Function
4. Exploded View and Parts list
5. MAIN Electrical Parts List
6. Level 1Repair
7. Disassembly and Assembly
Instructions
8. Chart of Troubleshooting
9. Reference data
Notice :
All functionality, features, specifications and other
product information provided in this document inclu
ding, but not limited to, the benefits, design, pricing,
components, performance, availability, and capabiliti
-es of the product are subject to change without
notice or obligation. Samsung reserves the right to
make changes to this document and the product
described herein, at anytime, without obligation on
Samsung to provide notification of such change.
GSM TELEPHONE CONTENTS

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1. Safety Precautions
1-1
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1-1. Repair Precaution
―Repair in Shield Box, during detailed tuning. Take specially care of tuning or test, because
specipicty of cellular phone is sensitive for surrounding interference(RF noise).
―Be careful to use akind of magnetic object or tool, because performance of parts is damaged by
the influence of magnetic force.
―Surely use astandard screwdriver when you disassemble this product, otherwise screw will be
worn away.
―Use athicken twisted wire when you measure level.
Athicken twisted wire has low resistance, therefore error of measurement is few.
―Repair after separate Test Pack and Set because for short danger (for example an overcurrent
and furious flames of parts etc) when you repair board in condition of connecting Test Pack and
tuning on.
―Take specially care of soldering, because Land of PCB is small and weak in heat.
―Surely tune on/off while using AC power plug, because arepair of battery charger is dangerous
when tuning ON/OFF PBA and Connector after disassembling charger.
―Don't use as you pleases after change other material than replacement registered on SEC System.
Otherwise engineer in charge isn't charged with problem that you don't keep this rules.

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Safety Precautions
1-2
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1-2. ESD(Electrostatically Sensitive Devices) Precaution
Several semiconductor may be damaged easily by static electricity. Such parts are called by ESD
(Electrostatically Sensitive Devices), for example IC,BGA chip etc. Read Precaution below.
You can prevent from ESD damage by static electricity.
―Remove static electricity remained your body before you touch semiconductor or parts with
semiconductor. There are ways that you touch an earthed place or wear static electricity prevention
string on wrist.
―Use earthed soldering steel when you connect or disconnect ESD.
―Use soldering removing tool to break static electricity. ,otherwise ESD will be damaged by static
electricity.
―Don't unpack until you set up ESD on product. Because most of ESD are packed by box and
aluminum plate to have conductive power,they are prevented from static electricity.
―You must maintain electric contact between ESD and place due to be set up until ESD is
connected completely to the proper place or acircuit board.

2. Specification
2-1
2-1.LTE General Specification
LTE
FDD 20
Freq. Band[MHz]
Uplink/Downlink
832~862
791-821
ARFCN range DL 6150~6449
UL 24150~24449
Tx/Rx spacing -41MHz
Mod. Bit rate/
Bit Period
Max UL 50Mbps
DL 100Mbps
Time Slot Period/
Frame Period 0.5ms
Modulation
UL :QPSK
16QAM
DL :QPSK
16QAM
64QAM
MS Power 23±2
Power Class CLASS 3
Sensitivity -100dBm @BW10MHz
TDMA Mux -
Cell Radius -

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3. Operation Instruction and Installation
3-1
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Main Function
•LTE 800MHz
•USB2.0 Highspeed
•Plug &Play(PnP) supported
•Macintosh,Window XP,Vista,7 supported

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4. Exploded View and Parts List
4-1
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4-1. Cellular phone Exploded View
QFR01
QMP01
QRE01
QBC00
QAN02
QCR67
QBC01
QCR94

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Exploded View and Parts List
4-2
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Design LOC Description SEC CODE
QCR67 SCREW-MACHINE 6001-002083
QMP01 A/S ASSY-PBA MAIN_GT-B3740(COMM)_SVC GH82-05368A
QRE01 ASSY CASE-REAR GH98-18455A
QBC00 ASSY COVER-SIM GH98-18499A
QBC01 ASSY CASE-CAP GH98-18456A
QCR94 SCREW-TAPPING 6002-001429
QFR01 ASSY CASE-FRONT GH98-18454A
QAN02 INTENNA-MAIN (GT-B3740) GH42-02800A
4-2. Cellular phone Parts list

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5. MAIN Electrical Parts List
5-1
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SEC CODE Design LOC Description
0403-001688 D403 DIODE-ZENER
0406-001267 D400,D401 DIODE-TVS
0504-001141 TR400,TR401,TR402 TR-DIGITAL
0601-001905 LED500 LED
0801-003022 U202 IC
1003-002367 U401 IC
1108-000344 UME200 MEMORY
1201-003187 U100 IC
1203-004602 U400 IC
1203-005263 U307 IC
1203-005512 U310 IC
1203-005521 U308 IC
1203-005580 U305 IC
1203-005812 U312 IC
1203-005865 U304,U309 IC
1203-006301 U300,U303,U306 IC
1203-006679 U311 IC
1205-003902 UCP200 IC
1205-004037 U101 IC
1209-001879 U102 IC
1404-001165 V100 THERMISTOR
1405-001298 D402,D404 VARISTOR
2007-000140 R406 R-CHIP
2007-000143 R400 R-CHIP
2007-000146 R402 R-CHIP
2007-000148 R230,R231,R232,R300 R-CHIP
2007-000152 R222,R223 R-CHIP
2007-000162 R313,R323,R324,R329 R-CHIP
2007-000162 R340,R343,R403 R-CHIP
2007-001298 R102 R-CHIP
2007-001305 R404 R-CHIP
2007-001316 R128 R-CHIP
2007-007014 R202 R-CHIP
2007-007095 R407 R-CHIP
2007-007100 R234 R-CHIP
2007-007107 R302,R325,R326 R-CHIP

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Main Electrical Parts List
5-2
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SEC CODE Design LOC Description
2007-007313 R101 R-CHIP
2007-007315 R224 R-CHIP
2007-007317 R143 R-CHIP
2007-007334 R303,R327 R-CHIP
2007-007538 R100 R-CHIP
2007-007875 R309,R328,R330,R341 R-CHIP
2007-008040 R240 R-CHIP
2007-008043 R136,R137 R-CHIP
2007-008045 R107,R109,R133 R-CHIP
2007-008046 R130 R-CHIP
2007-008052 R342 R-CHIP
2007-008055 R316,R317 R-CHIP
2007-008211 R108,R110 R-CHIP
2007-008354 R311,R355 R-CHIP
2007-008401 R233 R-CHIP
2007-008477 R116,R120 R-CHIP
2007-008516 R245,R246 R-CHIP
2007-008531 R106,R254 R-CHIP
2007-008548 R132 R-CHIP
2007-008582 R405 R-CHIP
2007-008739 R312,R314 R-CHIP
2007-008806 R138 R-CHIP
2007-008812 R344 R-CHIP
2007-009157 R225,R226 R-CHIP
2007-009793 R123,R131 R-CHIP
2007-009964 R227 R-CHIP
2007-010202 R144,R241,R242,R243 R-CHIP
2007-010202 R244 R-CHIP
2203-000233 C140,C144,C146,C154 C-CER,CHIP
2203-000233 C178,C179,C182,C403 C-CER,CHIP
2203-000254 C120,C121,C243,C246 C-CER,CHIP
2203-000386 C251,C252 C-CER,CHIP
2203-000438 C108,C134,C135,C136 C-CER,CHIP
2203-000438 C168,C173,C244,C245 C-CER,CHIP
2203-000489 C175 C-CER,CHIP
2203-000585 C147,C160,C162 C-CER,CHIP

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Main Electrical Parts List
5-3
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SEC CODE Design LOC Description
2203-000627 C301,C302,C306,C319 C-CER,CHIP
2203-000627 C320,C345 C-CER,CHIP
2203-000812 C259 C-CER,CHIP
2203-001259 C248,C249 C-CER,CHIP
2203-002687 C167 C-CER,CHIP
2203-005281 C126 C-CER,CHIP
2203-005395 C111,C122 C-CER,CHIP
2203-005480 C166 C-CER,CHIP
2203-006120 C109,C110 C-CER,CHIP
2203-006194 C169,C176,C205,C211 C-CER,CHIP
2203-006194 C214,C216,C220,C225 C-CER,CHIP
2203-006194 C226,C228,C230,C233 C-CER,CHIP
2203-006379 C153 C-CER,CHIP
2203-006423 C100,C103,C104,C113 C-CER,CHIP
2203-006423 C115,C116,C128,C130 C-CER,CHIP
2203-006423 C133,C138,C139,C180 C-CER,CHIP
2203-006423 C181 C-CER,CHIP
2203-006462 C170 C-CER,CHIP
2203-006562 C202,C203,C241,C242 C-CER,CHIP
2203-006562 C300,C303,C305,C309 C-CER,CHIP
2203-006562 C312,C314,C318,C324 C-CER,CHIP
2203-006562 C329,C330,C331,C332 C-CER,CHIP
2203-006562 C333,C340,C341,C342 C-CER,CHIP
2203-006562 C343,C350,C351,C352 C-CER,CHIP
2203-006562 C400,C404,C411 C-CER,CHIP
2203-006681 C250,C401 C-CER,CHIP
2203-006824 C102,C402 C-CER,CHIP
2203-006839 C107,C127,C161,C163 C-CER,CHIP
2203-006839 C204,C206,C207,C208 C-CER,CHIP
2203-006839 C209,C210,C212,C213 C-CER,CHIP
2203-006839 C215,C217,C218,C219 C-CER,CHIP
2203-006839 C221,C222,C223,C224 C-CER,CHIP
2203-006839 C227,C229,C231,C232 C-CER,CHIP
2203-006839 C234,C235,C247,C260 C-CER,CHIP
2203-006839 C261,C262,C263,C264 C-CER,CHIP
2203-006839 C265,C355,C409,C410 C-CER,CHIP

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Main Electrical Parts List
5-4
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SEC CODE Design LOC Description
2203-006841 C101,C105,C112,C114 C-CER,CHIP
2203-006841 C117,C129,C131,C132 C-CER,CHIP
2203-006890 C310,C311,C323,C327 C-CER,CHIP
2203-006890 C346,C347 C-CER,CHIP
2203-007143 C151 C-CER,CHIP
2203-007279 C106,C313,C328,C348 C-CER,CHIP
2203-007342 C200,C201 C-CER,CHIP
2203-007474 C137,C142 C-CER,CHIP
2203-007701 C412 C-CER,CHIP
2203-007775 C353,C354 C-CER,CHIP
2703-001178 L114 INDUCTOR-SMD
2703-001733 L120 INDUCTOR-SMD
2703-001734 L105,L110,L113,L119 INDUCTOR-SMD
2703-001737 L100,L104 INDUCTOR-SMD
2703-001748 L127 INDUCTOR-SMD
2703-001751 L126 INDUCTOR-SMD
2703-001752 L107,L122 INDUCTOR-SMD
2703-001786 L108 INDUCTOR-SMD
2703-002309 L101 INDUCTOR-SMD
2703-002901 L116,L118 INDUCTOR-SMD
2703-003502 L314 INDUCTOR-SMD
2703-003686 L301,L305,L313 INDUCTOR-SMD
2703-003892 L302,L303 INDUCTOR-SMD
2703-003913 L304 INDUCTOR-SMD
2703-003916 L112 INDUCTOR-SMD
2801-004466 OSC201 CRYSTAL-SMD
2801-004543 OSC200 CRYSTAL-SMD
2809-001350 OSC100 OSCILLATOR-VCTCXO
2901-001496 F401,F402 FILTER-EMI SMD
2904-001979 F103 FILTER-SAW
2910-000112 F101,F102 DUPLEXER-SAW
3301-001789 L306,L308,L309,L310 BEAD-SMD
3301-001789 L311,L312 BEAD-SMD
3301-001946 L124,L125,L307 BEAD-SMD
3301-001956 L400 BEAD-SMD
3705-001731 RFS100,RFS101 CONNECTOR-COAXIAL

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Main Electrical Parts List
5-5
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SEC CODE Design LOC Description
3709-001447 SIM500 CONNECTOR-CARD EDGE
3711-007173 HDC401 HEADER-BOARD TO BOARD
3712-001348 L106,L111 CONNECTOR
3722-002976 HDC400 PLUG-USB
4709-001948 F104,F105 BALUN
GH70-03349A SC203,SC204,SC205 IPR SHIELD-CAN CLIP
GH70-03349A SC206,SC207,SC208 IPR SHIELD-CAN CLIP
GH70-03349A SC209,SC212,SC214 IPR SHIELD-CAN CLIP
GH70-03349A SC217,SC219,SC220 IPR SHIELD-CAN CLIP
GH70-03349A SC221,SC224,SC225 IPR SHIELD-CAN CLIP
GH70-03349A SC226 IPR SHIELD-CAN CLIP
Please consult the GSPN website (Samsung Portal) for the most recent version of the product's
part list.

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6. Level 1Repair
6-1
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6-1. S/W Download
6-1-1. Pre-requsite for S/W Downloading
•Downloader Program(C2xDownloader.exe)
•GT-B3740 LTE DONGLE
•Binary files
6-1-2. Driver Installation
■Auto Installation
1. Connect your modem to aUSB port of your Computer. The install wizard
windows appears on the Computer
2. Click [Next] to continue.
3. Click [Install] to start the installation.
4. When the installation is finished, click [Finish]. The icon will be added to
the desktop.
■Manual installation 1
If the Install Wizard doesn't start automatically, follow the steps below.
1. Ensure that your modem is attached to aUSB port of your Computer.
2. Run Explorer on your Computer.
3. Find [My Computer] →[Devices with Removable Storage]
4. Double-click [Mobile_Broadband], then, the Install Wizard will Start.
☞The Install Wizard may not work because of user settings in the Computer or
unknown causes.
■Manual installation 2
If you want to download the program from the web, follow the steps below.
1. Run Internet Web Browser.
2. Go to http://fus.samsungmobile.com/GT-B3740/Vodafone/Install.html
3. Click [Download for Windows SW Package]. The file Download window will
appear.
4. Click [Open]. The Install Wizard will start

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Level 1Repair
6-2
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6-1-3. S/W Downloader Program
■Load the binary download program by executing the
"C2xDownloader.exe "←enter this file.
1.Connect the dongle to aUSB port of your PC.
2.Select the Binary in sequence of Boot, Loader, LTE, ISO.
(_.but /_.
ldr /_. mac /_. iso)
1
2
3
4

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Level 1Repair
6-3
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Level 1Repair
6-4
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Level 1Repair
6-5
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3.P
ress the "Update" button.
(downloading screen)

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Level 1Repair
6-6
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4.When downloading is complete, you can see the text "State :Update Complete"
5.If you want to check binary. Double-Click icon(Samsung Connection Manager).
Click button. And you will see the information of S/W Version

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7. Level 2Repair
7-1
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7-1. Disassembly
1 2
3 4
Loose 2screws of REAR. Disassemble the rear by using the tool.
PBA and FRONT.
Separate PBA and FRONT.

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7. Level 2Repair
7-2
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5 6
Disassemble Shield CAN by using the tool.
Be careful adamage of PBA.
Disassemble Shield CAN by using the tool
Be careful adamage of PBA.