TFT-LCD TV Chassis Model SP15SO LA15S51B 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.
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Samsung Electronics Co.,Ltd. - This Service Manual is a property of 416, Maetan-3Dong, Yeongtong-Gu, Suwon City, Samsung Electronics Co., Ltd. Gyeonggi-Do, Korea, 443-742 Any unauthorized use of Manual can be Printed in Korea punished under applicable International P/N : BN82-00131F-00 and/or domestic law.
1 Precautions 1 Precautions Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as electrical shock. 1-1 Safety Precautions 1-1-1 Warnings For continued safety, do not attempt to modify the circuit board. Disconnect the AC power and DC Power Jack before servicing.
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1 Precautions 1-2 Servicing Precautions WARNING: An electrolytic capacitor installed with the wrong polarity might explode. Caution: Before servicing units covered by this service manual, read and follow the Safety Precautions section of this manual. Note: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions, always follow the safety precautions.
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2 Product Specifications 2-2 Pin Assignments 2-2-1 DVD 2-2-2 S-Video Separate RCA Green Pb (Cb) RCA Blue Pr (Cr) RCA Red Audio L RCA White Audio R RCA Red 2-2-4 D-SUB 2-2-3 A/V Separate RCA Yellow CVBS Audio L Green RCA White Blue Audio R...
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2 Product Specifications 2-3 Timing Chart - This section of the service manual describes the timing that the computer industry recognizes as standard for computer-generated video signals. Table 2-1 Timing Chart VESA Mode 800/75 Hz, VGA2/ VGA3/ 640/75 Hz, 56Hz, 1024/60Hz 1024/75Hz 70 Hz...
3 Disassembly and Reassembly 3 Disassembly and Reassembly This section of the service manual describes the disassembly and reassembly procedures for the LA15S51B TFT-LCD TV. WARNING: This monitor contains electrostatically sensitive devices. Use caution when handling these components. 3-1 Disassembly Cautions: 1.
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3 Disassembly and Reassembly 3. Remove 11 screws from the boards and lift up the boards. 4. Remove 6 screws from the shield PCB. 5. Lift up the shield PCB and lift up the LCD panel.
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3 Disassembly and Reassembly 3-2 Replacement Order of Lamp Assemblies 1. After confirm there is nothing on the desk, turn the LCD module over and put it on a flat desk set to the ground. 2. Remove 2 screws for the lamp unit.
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3 Disassembly and Reassembly 3. Slide the lamp unit out. Please take out the lamp Slide the lamp unit out. unit from the LCD module. Slide the lamp unit out. 4. Please fix the new lamp units on the LCD module : opposite process 2 and 3.
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4 Alignments and Adjustments 4 Alignments and Adjustments 4-1 General Alignment Instuction 1. Usually, a color LCD TV needs only slight touch-up adjustment upon installation. Check the basic characteristics such as height, horizontal and vertical sync. 2. Use the specified test equipment or its equivalent. 3.
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4 Alignments and Adjustments 4-2 Factory Mode Adjustments 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...
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4 Alignments and Adjustments 7. Test Pattern (Test Pattern of VCTi) 1) VCTi 2) Toshiba 3) Gray Bar 4) Gray 5) Green 6) Color Bar 7) Cross 8. Bus Stop - Bus stop is used data communication. 9. Chcek Sum - Display the current check sum size of the MICOM.
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4 Alignments and Adjustments 4-2-4 Calibration...
5 Troubleshooting 5 Troubleshooting 5-1 No Power Does proper DC 14V/5V Check CN803 Pin3, Pin9 in I/P appear at Pin 3. Pin 9 of Board. CN100? Does proper DC A5V Check IC101 and IC105. appear at FT144? Does proper B3.3V Check IC111.
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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.
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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...
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5 Troubleshooting 5-3 No Sound Does the signal appear at Pin 110 (Tuner sound signal) (RF) Check Tu01 (TV Tuner). Pin 113, 114 (VCR sound) (Video) Check the CN913. (DVD) Check the CN901. Pin 115, 116 (DVD) Pin 117, 118 (PC) of IC802 (VCTj)? Does the signal appear at Pin Check IC802.
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 (OPTION) (OPTION)
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/ Level Loc. No. Code No. Description & Specification Q'ty SA/SNA LA15S51BX/XSA LA15S51B,Q11A/15A91-GSP,15,LCD-TV,AUSTRA M0001 BN90-00710B ASSY COVER FRONT;SP15EO S.N.A...
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 C217 100nF C114...
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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)
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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...
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11 Schematic Diagrams - This Document can not be used without Samsung's authorization. 11-5 Power Supply, Inverter Board Schematic Diagram 11-7...