Samsung LT15M23C Service Manual
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Samsung LT15M23C Service Manual

Samsung LT15M23C Service Manual

Tft-lcd tv ve15jo chassis
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SERVICE
TFT-LCD TV
TFT-LCD TV
Chassis
VE15JO
Manual
4. Alignment & Adjustments
10. PCB Layout
12. Panel Description
Model
LT15M23C
CONTENTS

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Summary of Contents for Samsung LT15M23C

  • Page 1: Table Of Contents

    TFT-LCD TV Chassis Model VE15JO LT15M23C SERVICE Manual TFT-LCD TV CONTENTS 1. Precautions 2. Product Specifications 3. Disassembly & Reassembly 4. Alignment & Adjustments 5. Troubleshooting 6. Exploded View & Parts List 7. Electrical Parts List 8. Block Diagram 9. Wiring Diagram 10.
  • Page 2 Samsung Electronics Co.,Ltd. This Service Manual is a property of 416, Maetan-3Dong, Yeongtong-Gu, Suwon City, Kyungki-Do, Samsung Electronics Co., Ltd. Korea, 443-742 Any unauthorized use of Manual can be Printed in Korea punished under applicable International P/N : BN82-00103Q-00 and/or domestic law.

  • Page 3: Precautions

    A substitute replacement that does not have the same safety characteristics as the recommended replacement part might create shock, fire and / or other hazards. Product safety is under review continuously and new instructions are issued whenever appropriate. LT15M23C...
  • Page 4 “anti-static” can replacement ESDs. Motions such as brushing clothes generate electrical charges sufficient to damage ESDs. together, or lifting your foot from a carpeted floor can generate enough static electricity to damage an ESD. LT15M23C...

  • Page 5: Product Specifications

    – MAX Internal speaker Output : Right => 2.5W Left => 2.5W Sound Characteristic – Headphone Out: 10mW max (3.50 Stereo Jack 32) – Output Frequency : RF => 80 Hz ~ 15 kHz at -3dB A/V => 80 Hz ~ 20 kHz at -3dB LT15M23C...
  • Page 6 2 Product Specifications 2-2 Pin Assignments 2-2-1 D1/D2 Connector Pin NO. Arrangement Y_GND PB_GND Pr_GND Preliminary Line1 Line1 Line5 Preliminary Line2 Line3 Switch GND Preliminary Line3 Switch 2-2-2 DTV SOUND 2-2-3 S-Video Audio L Separate RCA White Audio R RCA Red LT15M23C...
  • Page 7 2-2-4 A/V RCA Yellow CVBS Audio L RCA White Audio R RCA Red 2-2-5 D-SUB Separate Green Blue GND (DDC Return) GND-Red GND-Green GND-Blue No Connection GND-Sync / Self Test DDC Data H - Sync V - Sync DDC Clock LT15M23C...
  • Page 8 Pixel Vertical Sync Horizontal Mode Resolution Clock Frequency(Hz) Polarity(H/V) Frequency(kHz) Frequency(MHz) 720X400 70.087 28.322 31.496 - / + LT15M23C 640X480 59.940 25.175 31.496 - / - 640X480 75.000 31.500 37.500 - / - LT15M23C 800X600 75.000 49.500 46.875 + / +...

  • Page 9: Disassembly & Reassembly

    3 Disassembly and Reassembly 3 Disassembly and Reassembly This section of the service manual describes the disassembly and reassembly procedures for the LT15M23C TFT-LCD TV. WARNING: This monitor contains electrostatically sensitive devices. Use caution when handling these components. 3-1 Disassembly Cautions: 1.
  • Page 10 LCD module over and put it on a flat desk set to the ground. 2. Remove 2 screws for the lamp unit. Slide the lamp unit out. 3. Slide the lamp unit out. Please take out the lamp unit from the LCD module. Slide the lamp unit out. LT15M23C...
  • Page 11 3 Disassembly and Reassembly 4. Please fix the new lamp units on the LCD module : opposite process 2 and 3. 3-3 Reassembly Reassembly procedures are in the reverse order of disassembly procedures. LT15M23C...
  • Page 12 3 Disassembly and Reassembly MEMO LT15M23C...
  • Page 13 6. Do not attempt to connect or disconnect any wire while the TV is turned on. Make sure that the power cord is disconnected before replacing any parts. 7. To protect aganist shock hazard, use an isolation transform. LT15M23C...
  • Page 14 4-2-1 Entering Factory Mode 1. To enter “Service Mode” Press the remote -control keys in this sequence : - If you do not have Factory remote - control - If you have Factory remote - control 4-2-2 Factory Mode Tree LT15M23C...
  • Page 15 4 Alignments and Adjustments LT15M23C...
  • Page 16 - Display the current check sum size of the MICOM. 10. Reset - Initializes the data in the MICOM. 11. T-VNC15NJP-0910 2004/06/08 - Display the MICOM program version. 4-2-3 White Balance High 267, 263 265, 260 x, y x, y LT15M23C...

  • Page 17: Troubleshooting

    Check IC101 and IC105. appear at FT144? Does proper B3.3V Check IC111. appear at Pin 2 of IC111? Does proper DC B1.8V Check IC112. appear at Pin 4 of IC112? Does proper DC B8V Check IC109. appear at FT130? LT15M23C...
  • Page 18 5 Troubleshooting Does proper DC 5V_P appear Check IC104. at Pin 2 of IC104? Does proper DC 9V_S Check IC110. appear at FT127? Does proper DC B5V Check IC108. appear at FT131? Check IC704 and IC802. LT15M23C...
  • Page 19 5 Troubleshooting WAVEFORMS LT15M23C...
  • Page 20 5 Troubleshooting 5-2 No Picture (TV, Video, S-Video, DVD) Check C800(TV) Check C822(Video) Check the input signal. Check C824(S-Video) Check C821(DVD)? Check the IC802. WAVEFORMS LT15M23C...
  • Page 21 Does the signal appear at Pin Check IC802. 123, 124 of IC802 (VCTj)? Does the signal appear Check the IC600 (Audio amp) at Pin 2, 5 of Pin 16, 19 and related circuit of IC600. IC600? Replace the speaker. LT15M23C...
  • Page 22 5 Troubleshooting Memo LT15M23C...

  • Page 23: Exploded View & Parts List

    6 Exploded View & Parts List 6 Exploded View and Parts List You can search for updated part codes through ITSELF web site. URL : http://itself. sec. samsung.co.kr LT15M23C...
  • Page 24 6 Exploded View & Parts List Memo LT15M23C...

  • Page 25: Electrical Parts List

    7 Electrical Parts List 7 Electrical Parts List You can search for updated part codes through ITSELF web site. URL : http://itself.sec.samsung.co.kr/ 7-1 Main PCB Parts Level Loc. No. Code No. Description Specification Remarks VE15JO S3-VE15JO SEC,XH-L06 BN94-00516M ASSY PCB MAIN-EA...
  • Page 26 C527 C-CER,CHIP 100nF,10%,16V,X7R,TP,1608 2203-005005 C528 C-CER,CHIP 100nF,10%,16V,X7R,TP,1608 2203-005005 C529 C-CER,CHIP 100nF,10%,16V,X7R,TP,1608 2203-005005 C530 C-CER,CHIP 100nF,10%,16V,X7R,TP,1608 2203-005005 C531 C-CER,CHIP 100nF,10%,16V,X7R,TP,1608 2203-005005 C532 C-CER,CHIP 100nF,10%,16V,X7R,TP,1608 2203-005005 C533 C-CER,CHIP 100nF,10%,16V,X7R,TP,1608 2203-005005 C534 C-CER,CHIP 100nF,10%,16V,X7R,TP,1608 2203-005005 C535 C-CER,CHIP 100nF,10%,16V,X7R,TP,1608 2203-000041 C540 C-CER,CHIP 0.01NF,0.25PF,50V,C0G,TP,1608 LT15M23C...
  • Page 27 C735 C-CER,CHIP 100nF,10%,16V,X7R,TP,1608 2203-005005 C736 C-CER,CHIP 100nF,10%,16V,X7R,TP,1608 2203-005005 C737 C-CER,CHIP 100nF,10%,16V,X7R,TP,1608 2203-005005 C738 C-CER,CHIP 100nF,10%,16V,X7R,TP,1608 2203-005005 C739 C-CER,CHIP 100nF,10%,16V,X7R,TP,1608 2203-005005 C740 C-CER,CHIP 100nF,10%,16V,X7R,TP,1608 2203-005005 C741 C-CER,CHIP 100nF,10%,16V,X7R,TP,1608 2203-005005 C742 C-CER,CHIP 100nF,10%,16V,X7R,TP,1608 2203-005005 C743 C-CER,CHIP 100nF,10%,16V,X7R,TP,1608 2203-005005 C744 C-CER,CHIP 100nF,10%,16V,X7R,TP,1608 LT15M23C...
  • Page 28 C839 C-CER,CHIP 100nF,+80-20%,25V,Y5V,TP,1608, 2402-001006 C840 C-AL,SMD 4.7uF,20%,25V,GP,TP,3.6x6.3x3. 2402-001006 C841 C-AL,SMD 4.7uF,20%,25V,GP,TP,3.6x6.3x3. 2402-001006 C842 C-AL,SMD 4.7uF,20%,25V,GP,TP,3.6x6.3x3. 2402-001006 C843 C-AL,SMD 4.7uF,20%,25V,GP,TP,3.6x6.3x3. 2402-001006 C844 C-AL,SMD 4.7uF,20%,25V,GP,TP,3.6x6.3x3. 2402-001006 C845 C-AL,SMD 4.7uF,20%,25V,GP,TP,3.6x6.3x3. 2203-000257 C846 C-CER,CHIP 10nF,10%,50V,X7R,TP,1608 2402-000170 C847 C-AL,SMD 1uF,20%,50V,GP,TP,4.3x4.3x5.4, 2203-000236 C900 C-CER,CHIP 0.1NF,5%,50V,C0G,TP,1608 LT15M23C...
  • Page 29 D912 DIODE-SWITCHING MMBD4148SE,100V,200MA,SOT-23,TP 0401-001056 D913 DIODE-SWITCHING MMBD4148SE,100V,200MA,SOT-23,TP 0403-001052 D914 DIODE-ZENER RD8.2MB,7.7-8.7V,200MW,SOT-23,TP 0401-001056 D915 DIODE-SWITCHING MMBD4148SE,100V,200MA,SOT-23,TP 0403-000579 D916 DIODE-ZENER BZX84C5V1,4.8-5.4V,200MW,SOT-23,TP 0403-000579 D917 DIODE-ZENER BZX84C5V1,4.8-5.4V,200MW,SOT-23,TP 0403-000579 D918 DIODE-ZENER BZX84C5V1,4.8-5.4V,200MW,SOT-23,TP 0403-000579 D919 DIODE-ZENER BZX84C5V1,4.8-5.4V,200MW,SOT-23,TP 0403-000579 D920 DIODE-ZENER BZX84C5V1,4.8-5.4V,200MW,SOT-23,TP 0403-001052 D921 DIODE-ZENER RD8.2MB,7.7-8.7V,200MW,SOT-23,TP LT15M23C...
  • Page 30 25VDC,2.0ADC,-,100nF,3.2x1.6x1 2901-001114 FT708 FILTER-EMI SMD 25VDC,2.0ADC,-,100nF,3.2x1.6x1 2901-001114 FT709 FILTER-EMI SMD 25VDC,2.0ADC,-,100nF,3.2x1.6x1 2901-001114 FT710 FILTER-EMI SMD 25VDC,2.0ADC,-,100nF,3.2x1.6x1 2901-001114 FT801 FILTER-EMI SMD 25VDC,2.0ADC,-,100nF,3.2x1.6x1 2901-001114 FT802 FILTER-EMI SMD 25VDC,2.0ADC,-,100nF,3.2x1.6x1 0505-001170 IC100 FET-SILICON SI9933ADY-T1,P,-20V,3.4A,0.06ohm,2W,SO-8 1203-002842 IC101 IC-POSI.FIXED REG. AP1117D-33A,TO-252,3P,6.7X5.6MM,PLASTIC,3.235/3.365V,-,0TO+150C,1A,-,TP 0505-001170 IC102 FET-SILICON SI9933ADY-T1,P,-20V,3.4A,0.06ohm,2W,SO-8 LT15M23C...
  • Page 31 R120 R-CHIP 100Kohm,5%,1/10W,TP,1608 2007-000102 R121 R-CHIP 100Kohm,5%,1/10W,TP,1608 2007-000074 R122 R-CHIP 100ohm,5%,1/10W,TP,1608 2007-000102 R127 R-CHIP 100Kohm,5%,1/10W,TP,1608 2007-000090 R128 R-CHIP 10Kohm,5%,1/10W,TP,1608 2007-000090 R165 R-CHIP 10Kohm,5%,1/10W,TP,1608 2007-000074 R166 R-CHIP 100ohm,5%,1/10W,TP,1608 2007-007004 R167 R-CHIP 12Kohm,1%,1/10W,TP,1608 2007-000965 R168 R-CHIP 5.1Kohm,5%,1/10W,TP,1608 2007-000708 R169 R-CHIP 3.9Kohm,1%,1/10W,TP,1608 LT15M23C...
  • Page 32 R706 R-CHIP 10Kohm,5%,1/10W,TP,1608 2007-000074 R707 R-CHIP 100ohm,5%,1/10W,TP,1608 2007-000074 R709 R-CHIP 100ohm,5%,1/10W,TP,1608 2007-000074 R710 R-CHIP 100ohm,5%,1/10W,TP,1608 2007-000074 R711 R-CHIP 100ohm,5%,1/10W,TP,1608 2007-000074 R712 R-CHIP 100ohm,5%,1/10W,TP,1608 2007-000090 R713 R-CHIP 10Kohm,5%,1/10W,TP,1608 2007-000074 R714 R-CHIP 100ohm,5%,1/10W,TP,1608 2007-000074 R715 R-CHIP 100ohm,5%,1/10W,TP,1608 2007-000074 R716 R-CHIP 100ohm,5%,1/10W,TP,1608 LT15M23C...
  • Page 33 R8106 R-CHIP 3.3Kohm,5%,1/10W,TP,1608 2007-000074 R8108 R-CHIP 100ohm,5%,1/10W,TP,1608 2007-000070 R8109 R-CHIP 0ohm,5%,1/10W,TP,1608 2007-000084 R8119 R-CHIP 4.7Kohm,5%,1/10W,TP,1608 2007-000084 R8120 R-CHIP 4.7Kohm,5%,1/10W,TP,1608 2007-000090 R8121 R-CHIP 10Kohm,5%,1/10W,TP,1608 2007-000052 R8126 R-CHIP 10Kohm,1%,1/10W,TP,1608 2007-000084 R8140 R-CHIP 4.7Kohm,5%,1/10W,TP,1608 2007-000084 R8141 R-CHIP 4.7Kohm,5%,1/10W,TP,1608 2007-000090 R8143 R-CHIP 10Kohm,5%,1/10W,TP,1608 LT15M23C...
  • Page 34 R-CHIP 75ohm,1%,1/10W,TP,1608 2007-000070 R889 R-CHIP 0ohm,5%,1/10W,TP,1608 2007-000070 R890 R-CHIP 0ohm,5%,1/10W,TP,1608 2007-000070 R891 R-CHIP 0ohm,5%,1/10W,TP,1608 2007-000070 R892 R-CHIP 0ohm,5%,1/10W,TP,1608 2007-000070 R895 R-CHIP 0ohm,5%,1/10W,TP,1608 2007-000234 R896 R-CHIP 1.3Kohm,5%,1/10W,TP,1608 2007-000402 R897 R-CHIP 150ohm,5%,1/10W,TP,1608 2007-000659 R899 R-CHIP 27ohm,5%,1/10W,TP,1608 2007-000074 R900 R-CHIP 100ohm,5%,1/10W,TP,1608 7-10 LT15M23C...
  • Page 35 R-NET 22OHM,5%,1/16W,L,CHIP,8P,TP,3216 2011-000002 RA706 R-NET 22OHM,5%,1/16W,L,CHIP,8P,TP,3216 2011-000881 RA800 R-NET 33ohm,5%,1/16W,L,CHIP,8P,TP 2011-000881 RA801 R-NET 33ohm,5%,1/16W,L,CHIP,8P,TP 2011-000881 RA802 R-NET 33ohm,5%,1/16W,L,CHIP,8P,TP 2011-000881 RA803 R-NET 33ohm,5%,1/16W,L,CHIP,8P,TP 2011-000881 RA804 R-NET 33ohm,5%,1/16W,L,CHIP,8P,TP 2011-000881 RA805 R-NET 33ohm,5%,1/16W,L,CHIP,8P,TP 2011-000881 RA806 R-NET 33ohm,5%,1/16W,L,CHIP,8P,TP 2011-000881 RA807 R-NET 33ohm,5%,1/16W,L,CHIP,8P,TP LT15M23C 7-11...
  • Page 36 BN69-00140T PAD-PALLET COVER SUN(LSA810),SW,900,3760,-,-,-,-,- BN69-00617H PALLET-PACKING VENICE15,WOODEN,1330,960,120 BN69-00641A CUSHION-L,R LT15M2,EPS M50 BN92-01009Q ASSY BOX VE15UO BH68-00329D LABEL BAR CODE-01 NO CE,NO WT`Y,MPRII,LABEL-BARCODE,MOJO 90G,90,95,WHT BH75-10529A UNIT-HANDLE PACKING LXA410TLMU,PE,-,WHITE,- BN69-00753A PACKING CASE-00 VE15,SW4 A,YEL,A1,W431*D467*H153,ASIA/SEA BN72-60001A LEVER-TOP LSD210TL,PE-LD,WHITE,TFT_LCD BN72-60002A LEVER-BOTTOM LSD210TL,PE-LD,WHITE,TFT-LCD 7-12 LT15M23C...
  • Page 37 LDPE,T0.05,L356,W240,TRP,28,2,PE MARK BH39-10339X ACCESSORY CBF POWER CORD DET,SVT,125V/7A,BLK,1830,WALL(ST),MSP-33,MSC-30 BN96-00952R ASSY ACCESSORY VE15UO UNIT/ACCESSORY 0203-000214 ACCESSORY TAPE-OPP MASKING OPP/W50/CLR,T0.05,W50,L400000, 6902-000110 ACCESSORY BAG PE LDPE,T0.05,L356,W240,TRP,28,2,PE MARK AA68-00371C ACCESSORY CARD WARRANTY-01 ,SEA,W/P100(G),1 YEAR AA68-40065B ACCESSORY ,SEA,A5,ENG,A/P220,2P(SIDES),4 CARD-01,REGISTRATION BN68-00633A ACCESSORY MANUAL USERS-00 LTP1545/1745/2045,SAMSUNG,E/F,NA,Mojo120/100g,B5 LT15M23C 7-13...
  • Page 38 7 Electrical Parts List Memo 7-14 LT15M23C...

  • Page 39: Block Diagram

    8 Block Diagrams 8 Block Diagram This Document can not be used without Samsung’s authorization. 8-1 Signal Path Block Diagram LT15M23C...
  • Page 40 8 Block Diagrams 8-2 Input Power Block Diagram LT15M23C...
  • Page 41 Q810 FET-SILICON 66.3 D949 DIODE-SWITCHING 97.6 38.7 Q811 FET-SILICON 66.3 D950 DIODE-ZENER 154.3 25.9 Q900 TR-SMALL SIGNAL 150.3 31.1 D951 DIODE-SWITCHING 87.9 Q901 TR-SMALL SIGNAL 146.3 31.1 D952 DIODE-SWITCHING 83.4 Q902 TR-SMALL SIGNAL 150.4 25.9 D953 DIODE-SWITCHING 84.2 LT15M23C 10-1...
  • Page 42 10 PCB Layout Memo 10-2 LT15M23C...

  • Page 43: Wiring Diagram

    9 Schematic Diagrams 9 Wiring Diagram LT15M23C...
  • Page 44 9 Schematic Diagrams Memo LT15M23C...

  • Page 45: Schematic Diagrams

    11 Schematic Diagrams 11 Schematic Diagrams This Document can not be used without Samsung’s authorization. 11-1 Input Power Sound Schematic Diagram B3.3V IC105 A1.8V IC101 A3.3V AP1117D-18A C111 IC111 AP1117D-33A 100uF AP1117D-33A IN 3 TP127 C163 100nF C217 C114 100nF...
  • Page 46 11 Schematic Diagrams 11-2 LT15M23C...
  • Page 47 11 Schematic Diagrams This Document can not be used without Samsung’s authorization. 11-2 Video Decoder Schematic Diagram VSUP3.3DIG B3.3V FT108 C127 10uF SGM32F1E104-2A R835 R858 C117 2.7Kohm 100nF R8103 VSUP3.3DAC Q805 FT107 C124 C317 C316 2SC2412K-Q SGM32F1E104-2A 10uF 470pF 1.5nF...
  • Page 48 11 Schematic Diagrams 11-4 LT15M23C...
  • Page 49 11 Schematic Diagrams This Document can not be used without Samsung’s authorization. 11-3 Output Scaler, LVDS Schematic Diagram B_OUT(0:7) B_OUT(3) T321 B_OUT(2) T322 B_OUT(1) T323 B_OUT(0) T324 T325 T326 G_OUT(0:7) G_OUT(7) T327 G_OUT(6) T328 G_OUT(5) T329 G_OUT(4) T330 G_OUT(3) T331...
  • Page 50 11 Schematic Diagrams This Document can not be used without Samsung’s authorization. 11-4 Power Supply, Inverter Board Schematic Diagram R809 3.9ohm 1/2W SVC561D-10A VX802S 11-6 LT15M23C...
  • Page 51 11 Schematic Diagrams This Document can not be used without Samsung’s authorization. 11-5 Power Supply, Inverter Board Schematic Diagram LT15M23C 11-7...
  • Page 52 11 Schematic Diagrams Memo 11-8 LT15M23C...

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