Samsung GT-C3750 Service Manual
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Samsung GT-C3750 Service Manual

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GSM TELEPHONE
GSM TELEPHONE
GT-C3750
2. Specification
3. Product Function
6. Level 1 Repair
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.
CONTENTS
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Summary of Contents for Samsung GT-C3750

  • Page 1: Table Of Contents

    - 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...
  • Page 2 This Service Manual is a property of Samsung Electronics Co.,Ltd. Samsung Electronics Co.,Ltd. ⓒ Any unauthorized use of Manual can be punished under applicable International and/or domestic law. 2011. 04. Rev.1.0...

  • Page 3: Gsm General Specification

    2. Specification 2-1. GSM General Specification GSM900 GSM850 DCS1800 PCS1900 F req. 880~ 915 8 24.2~ 848.8 1710~ 1785 1850~ 1910 Band[ MHz] 925~ 960 8 69.2~ 893.8 1805~ 1880 1930~ 1990 Uplink/Downlink 0~1 24 & ARFCN r ange 128~ 251 512~ 885 512~ 810 975~1 023...

  • Page 4: Gsm Tx Power Class

    Speclflcation 2-2. GSM TX power class TX Power TX Power DCS1800 PCS1900 GSM850 GSM900 control level control level 30±2 dBm 30±2 dBm 33±2 dBm 33±2 dBm 28±3 dBm 28±3 dBm 31±3 dBm 31±3 dBm 26±3 dBm 26±3 dBm 29±2 dBm 29±2 dBm 24±2 dBm 24±2 dBm...

  • Page 5: Operation Instruction And Installation

    • 3.2M CMOS Camera • BT v2.1+EDR, MicroUSB 2.0, Micro SD(Up to 16G) • FM Radio Support • MP3 Player • 3.5pi Earjack Support • SMS, MMS SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 6: Software Downloading

    • JIG BOX (GH99-36900A) • RF Test Cable (GH39-00985A) • JIG Cable (GH39-01290A) • Adapter (GH99-38251A) • Binary files Connect to Computer using data cable. SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 7 6-1-2. S/W Downloader Program ■ Load the binary download program by executing the " FlashTool_E2_XMM2150 " 1. Select the connected serial port and the rate of speed. SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 8 Level 1 Repair 2. Select communication driver as Infineon USB driver. SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 9 Level 1 Repair 3. Select the Binary in sequence of _psi, _slb, _BSY, _CDS, _CSC. (If you click custom order, it can be reorder as in sequence) SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 10 Level 1 Repair 4. Press the "Next" button. SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 11 5. Press Start USB1 and connect the Handset. 6. When downloading is complete, you can see green bar. 7. Confirm the downloaded version name and etc. : *#1234# Full Reset : *2767*3855# SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 12 ― QPSK: Quadrature Phase Shift Keying ― RS : Reed-Solomon ― SI : Service Information ― TDM : Time Division Multiplexing ― TS : Transport Stream SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 13: Safety Precautions

    ― 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. SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 14 ― You must maintain electric contact between ESD and place due to be set up until ESD is connected completely to the proper place or a circuit board. SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 15: Exploded View And Parts List

    4-1. Cellular phone Exploded View QFR01 QMW01 QCR93 QKP01 QFU01 QCR12 QME01 QMP01 QCA01 QAN02 QKP02 QSP01 QRF06 QAR01 QCK01 QLC01 QME02 QRE01 QPC01 QFL01 QCR67 QBA01 QCR12 QBC00 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 16: Cellular Phone Parts List

    ASSY COVER-BATTERY GH98-20035A QFU01 ASSY COVER-SLIDE UPPER GH98-20030A QMW01 ASSY COVER-MAIN WINDOW GH98-20031A QRE01 ASSY COVER-REAR GH98-20034A QRF06 PMO COVER-USB GH72-63291A QCK01 PMO KEY-CAMERA GH72-63292A SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 17: Main Electrical Parts List

    R-CHIP 2007-000141 R210,R211 R-CHIP 2007-000143 R109,R312,R406 R-CHIP 2007-000148 R202,R324,R325,R326 R-CHIP 2007-000148 R327,R328,R401,R402 R-CHIP 2007-000148 R403 R-CHIP R515,R516 R-CHIP 2007-000149 2007-000157 R213,R329,R500,R514 R-CHIP 2007-000162 R111,R417 R-CHIP SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 18 C-CERAMIC,CHIP 2203-002709 C113,C219 C-CERAMIC,CHIP 2203-005057 C100,C102 C-CERAMIC,CHIP 2203-005234 C108 C-CERAMIC,CHIP 2203-005288 C104 C-CERAMIC,CHIP 2203-005480 C226 C-CERAMIC,CHIP C123,C124,C205,C220 C-CERAMIC,CHIP 2203-005481 2203-005483 C513,C514 C-CERAMIC,CHIP 2203-006048 C200,C201,C202,C207 C-CERAMIC,CHIP SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 19 INDUCTOR-SMD 2703-002204 L100 INDUCTOR-SMD 2703-002208 L104,L106 INDUCTOR-SMD 2703-002268 L113,L118 INDUCTOR-SMD 2703-002269 L119 INDUCTOR-SMD 2703-002281 L105,L108,L117 INDUCTOR-SMD L115,L116 INDUCTOR-SMD 2703-002365 2703-002367 L101,L121 INDUCTOR-SMD 2703-002369 L112 INDUCTOR-SMD SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 20 P l e a s e c o n s u l t t h e G S P N w e b s i t e ( S a m s u n g P o r t a l ) f o r t h e m o s t r e c e n t v e r s i o n o f t h e p r o d u c t ' s p a r t l i s t . SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 21: Level 2 Repair

    Detach tape FRONT 1.Detach Slide FPCB using a tweezer. 1. Detach tape 2. Unscrew 6 points. SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization This Document can not be used without Samsung's authorization...
  • Page 22 1.Unscrew 4 points. 1. Detach SUB PBA Tape. Disassemble SUB PBA, RCV and SLIDE FPCB 1. Disassemble SLIDE FPCB. 2. Disassemble RCV. 3. Disassemble SUB PBA. SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 23 Detach a white tape & attach SLIDE FPCB. => Follow red arrow direction. 1. Screw 4 Points. 2. Screw 6 points. 3. Assemble KEY PAD SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 24 7. Level 2 Repair Assemble PBA 1. Attach the tape.(lower hinge & Front Connecting) 1. Assemble PBA. Assemble REAR 1. Assemble REAR 2. Screw 4 points. SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 25: Level 3 Repair

    8. Level 3 Repair 8-1. Block Diagram SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 26 Level 3 Repair 8-2. PCB Diagrams 8-2-1. Top SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 27 Level 3 Repair 8-2-1. Bottom SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 28 ※ presetting methods for checking TP - GND & TP(exp. VBAT= C105 ) using Oscilloscope - look over the coming out signal. ← Oscilloscope TP (Test Point) SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 29 - EX) to look up the TP, shunt Cap. - if checking the GND, you can listen "beep" if checking the Signal, you can't listen it. SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 30 Check the Clock at OSC201 1,3pin (TP : OSC201 1,3pin / look over the waverform (when normal operating condition, 26MHz ±11ppm) using the oscilloscope) Check the initial operation SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 31 Level 3 Repair SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 32 Level 3 Repair SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 33 Resolder R206, must be higher than 1.7V. ,measure GND & SHORT PAD using the oscilloscope. LCD_RST > 1.7V ? Change PBA. (TP : HEA400 pin9) Check the 16bit data signals. SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 34 Level 3 Repair the 5th pin from the the top of left pin. 8-10 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 35: Charging Part

    C400) ≥ 4.2V Replace D400 check the D400(short) and C415, C400(short) or open the C415, C400 Check the Battery and TA is connected correctly 8-11 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 36 Level 3 Repair 8-12 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 37: Sim Part

    Resolder or Replace SIM300 pin3(SIM_CLK) ≥ 3MHz ? Check signal sequence, VSIM_2.85V(C302) → Change PBA SIM_IO(C305) → SIM_CLK(C304) → SIM_RST(C303) Check the SIM Card (is broken?) 8-13 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 38 Level 3 Repair 8-14 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 39: Microphone Part

    (not work if those are not connected.) Check the MIC sample. Replace an another MIC (it be possible the problem (because of being possible the problem) things) 8-15 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 40 Level 3 Repair 8-16 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 41 (not work if those is not connected.) Check the Headset sample. Replace an another Headset (it be possible the problem things) (because of being possible the problem) 8-17 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 42 Level 3 Repair 8-18 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 43 Level 3 Repair 8-19 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 44: Speaker Part

    UCP a bad sample) select the Call ringtone) Change Speaker Is Speaker working? (be possible of SPK Problems (Listening through the or not inserting it right.) speaker) 8-20 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 45 Level 3 Repair 8-21 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 46 Call ringtone) UCP, U501 are bad samples) Is Ear Speaker working? Change Headset (Listening through the (be possible of Ear SPK Problems) Ear speaker) 8-22 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 47 Level 3 Repair 8-23 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 48 Level 3 Repair 8-24 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 49 Check the Motor sample. Replace an another Speaker module sample (it be possible the problem things) (because of being possible the problem) 8-25 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 50 Level 3 Repair 8-26 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 51: Key Data Input

    FPCB) Check the key resolder R332, R333, circuit. R338, R339, ZD302, (not connected, not D302 soldered, short) Check the SUB PBA (is broken?) 8-27 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 52 Level 3 Repair 8-28 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 53 Change the SUB PBA or connect the slide (connection, broken) FPCB to PBA correctly. Resolder the C417. The Voltage at C417=VBAT? Check the HEA400 mounted to PBA correctly. 8-29 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 54 Level 3 Repair 8-30 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 55 PAM100 Pin12 ≥ Check ANT Switch control check -68dBm control circuit Resolder PAM100 F100 8,9pin, L105,L108, L107,L109 ≥ Resolder F100,L105,L106,L107,L108,L109 - 75dBm Check UCP200 is working 8-31 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 56 Check PAM100 Check ANT Switch -68dBm control check control circuit Resolder PAM100 F100 8,9pin, L105,L108, L107,L109 ≥ Resolder F100,L104,L105,L107,L108,L109 - 75dBm Check UCP200 is working 8-32 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 57 Check ANT Switch control check -68dBm control circuit Resolder PAM100 F101 9,8pin, L113, L119, L117, L118 ≥ Resolder F101,L113,L116,L117,L118,L119 -75dBm Check UCP200 is working 8-33 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 58 Check ANT Switch control check -68dBm control circuit Resolder PAM100 F101 9,8pin, L113, L119, L117, L118 ≥ Resolder F101,L113,L115,L117,L118,L119 -75dBm Check UCP200 is working 8-34 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 59 Level 3 Repair 8-35 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 60 Level 3 Repair 8-36 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 61 C103 〉 3.3V? circuit. PAM100 Pin17 ≥ 30dBm Resolder PAM100 (R100 using spectrum analyzer) Check the RFS100 Resolder RFS100. connection with PCB? Antenna re-solder or change 8-37 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 62 C103 〉 3.3V? circuit. PAM100 Pin17 ≥ 30dBm Resolder PAM100 (R100 using spectrum analyzer) Check the RFS100 Resolder RFS100. connection with PCB? Antenna re-solder or change 8-38 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 63 Level 3 Repair 8-39 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 64 Level 3 Repair 8-40 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 65 ○ ○ ○ ○ ○ ○ ● ○ ○ ○ ○ ● ● ○ ○ ● ○ ○ ○ ○ ○ ○ ○ ○ 8-41 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 66 ○ ○ ○ ○ ○ ○ ○ ○ ○ ● ● ● ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ● ● 8-42 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 67 ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ● ● 8-43 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 68 www.s-manuals.com...

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