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. LW17M24C/LW20M21C...
“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. LW17M24C/LW20M21C...
2 Product Specifications 2 Product Specifications 2-1 LW17M24C, LW20M21C Specifications Description Item LW17M24C LW20M21C LCD Panel TFT-LCD panel , RGB verti c al stri p e, normal y whi t e, 17-Inch vi e wabl e , 0.264 (H) x 0.264(V)mm pi x el pi t ch TFT-LCD panel , RGB verti c al stri p e, normal y whi t e, 20-Inch vi e wabl e , 0.2125(H) x 0.6375(V) mm pi x el pi t ch...
Video In Separate 2-2-3 A/V Green Blue RCA Yellow CVBS GND (DDC Return) Audio L GND-Red RCA White GND-Green GND-Blue No Connection Audio R GND-Sync / Self Test RCA Red DDC Data H - Sync V - Sync DDC Clock LW17M24C/LW20M21C...
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 Mode IBM(LW17M24C/LW20M21C) VESA(LW17M24C) 640/75 Hz, 60Hz, 800/75 Hz, 56Hz, VGA2/70 Hz VGA3/60 Hz...
3 Disassembly and Reassembly 3 Disassembly and Reassembly This section of the service manual describes the disassembly and reassembly procedures for the LW17M24C/LW20M21C TFT-LCD TV. WARNING: This monitor contains electrostatically sensitive devices. Use caution when handling these components. 3-1-1 LW17M24C Cautions: 1.
Page 9
LVDS cable with a nipper. 4. Disconnect function cable, speaker cable, inverter cable and LVDS cable from the board. 5. Remove 8 screws from the shield panel and lift up the panel. LW17M24C/LW20M21C...
Page 10
3 Disassembly and Reassembly 3-2 Reassembly Reassembly procedures are in the reverse order of disassembly procedures. LW17M24C/LW20M21C...
Page 11
3 Disassembly and Reassembly Memo LW17M24C/LW20M21C...
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. LW17M24C/LW20M21C...
Auto Adjustment in Cross Hatch (also called Combination) (Model : 10, Pattern : 25) After adjusting 16 Gray Pattern (Model : 10, Pattern : 17) Fac t ory Mode Calibr ation Ente r (3) check 4.ADC of Factory Mode. Adjustment can be done as below. Value variation can be 10~20. LW17M24C/LW20M21C...
R e c a l l 3 . W / B ( 2 ) Adjustment item Remark [I nitial Data] [Ad just Data] Red level ADJ[0~255] LW17M24C Blue level 118FIX Green level ADJ[0~255] Red Gain 162FIX Blue level FIX[0~255] Red Gain...
Page 15
L o w e r E n d F r A p p M i d S t a r t E s m C t r l 1 2 7 M i d E n d 1 0 0 LW17M24C/LW20M21C...
- Display the current check sum size of the MICOM. 10. Reset - Initializes the data in the MICOM. 11. T-VNC17(20) PEU-0003 2004/04/20 - Display the MICOM program version. 4-2-3 White Balance LW17M24C High 285, 295 285, 295 x, y x, y...
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? LW17M24C/LW20M21C...
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. LW17M24C/LW20M21C...
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(SCART)? Check the IC802. WAVEFORMS LW17M24C/LW20M21C...
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 IC600? and related circuit of IC600. Replace the speaker. LW17M24C/LW20M21C...
6 Exploded View and Parts List You can search for updated part codes through ITSELF web site. URL : http://itself. sec. samsung.co.kr 6-1 LW17M24C LW17M24C/LW20M21C...
Page 24
6 Exploded View & Parts List 6-2 LW20M21C LW17M24C/LW20M21C...
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/ 7-1-1 LW17M24C Main PCB Parts Level Code No. Loc. No. Description Specification Remarks VC17EO S5-VC17EO SEC,EH-L05(ZPD) BN94-00539S ASSY PCB MAIN...
Page 57
11 Schematic Diagrams This Document can not be used without Samsung’s authorization. 11-3 Output Scaler, LVDS Schematic Diagram OUT(0:19) OUT(19) T321 OUT(18) RA715 T322 1/16W OUT(17) T323 OUT(16) T324 T325 T326 RA714 OUT(15) T327 OUT(14) 1/16W T328 OUT(13) T329 OUT(12)
Page 58
11 Schematic Diagrams This Document can not be used without Samsung’s authorization. 11-4 LW17M24C IP Board_1 Schematic Diagram 11-6 LW17M24C/LW20M21C...
Page 59
11 Schematic Diagrams This Document can not be used without Samsung’s authorization. 11-5 LW17M24C IP Board_2 Schematic Diagram LW17M24C/LW20M21C 11-7...
Page 60
11 Schematic Diagrams This Document can not be used without Samsung’s authorization. 11-6 LW20M21C IP Board_1 Schematic Diagram 11-8 LW17M24C/LW20M21C...
Page 61
11 Schematic Diagrams This Document can not be used without Samsung’s authorization. 11-7 LW20M21C IP Board_2 Schematic Diagram LW17M24C/LW20M21C 11-9...
Page 63
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 : BN82-00103P-00 and/or domestic law.