website:http://biz.LGservice.com e-mail:http://www.LGEservice.com/techsup.html LCD TV SERVICE MANUAL CHASSIS : LP62C FACTORY MODEL : 37LC2R-TH / 42LC2R-TH MODEL : 37LC2R / 42LC2R CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CONTENTS CONTENTS .............................................................................................. 2 SAFETY PRECAUTIONS ..........................................................................3 SPECIFICATION ........................................................................................6 ADJUSTMENT INSTRUCTION................................................................11 TROUBLE SHOOTING ............................................................................
SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic Diagram and Replacement Parts List. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer.
SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this service manual and its supplements and addenda, read and follow the SAFETY PRECAUTIONS on page 3 of this publication. NOTE: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions on page 3 of this publication, always follow the safety precautions. Remember: Safety First. General Servicing Precautions 1.
IC Remove/Replacement Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent flat against the circuit foil. When holes are the slotted type, the following technique should be used to remove and replace the IC. When working with boards using the familiar round hole, use the standard technique as outlined in paragraphs 5 and 6 above. Removal 1.
SPECIFICATION NOTE : Specifications and others are subject to change without notice for improvement. 1. Application range 3. Test method This specification is applied to LP62C chassis. 2. Requirement for Test Testing for standard of each part must be followed in below condition. 3.1 Performance : LGE TV test method followed 3.
5. General Specification No Item Specification 1 Panel 37", 42" TFT WXGA LCD 2 Frequency range H : 31 ~ 61KhzV : 56 ~ 75Hz 3 Control Function Remark PC Input 1) Contrast/Brightness 2) H-Position / V-Position 3) Tracking : Clock / Phase 4) Auto Configure 5) Reset 4 5 Component Jack Y/Pb/Pr : 1EA ZH (480i/576i/480p/576p/720p/1080i) Y/Pb/Pr : 2EA TH Power ON LED Power consumption White ≤ 190W(37") ≤ 230W(42") Stand by 6 LCD Module RED ≤ 1W Outline 37" 877.0 x 516.8 x 55.
6.2. 37LC2R-TH/37LC2R-ZH(Only AUO Module) No Parameter Symbol Value Min 1. Contrast Ratio CR Typ Unit Remark Max 32", 37" 800 1200 (*) Normal Mode 42" 700 1000 - 100IRE Full white window pattern - APC : Clear (Dynamic) 2. Surface Luminance, LWH 360 Cd/m2 450 white (*) Normal Mode - 100IRE Full white window pattern - APC : Clear (Dynamic) 3. White Coordinate Normal Cool Warm 4. Color Temperature 5. Color pull in Range 6. Color killer Sensitivity X axis 0.280 0.283 0.
8. Component Video Input (Y, PB, PR) No Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Remarks 1. 720 x 480 15.73 59.94 13.500 SDTV, DVD 480I(525I) 2. 720 x 480 15.75 60.00 13.514 SDTV, DVD 480I(525I) 3. 720 x 576 15.625 50.00 13.500 SDTV, DVD 576I(625I) 4. 720 x 480 31.47 59.94 27.000 SDTV 480P 5. 720 x 480 31.50 60.00 27.027 SDTV 480P 6. 720 x 576 31.25 50.00 27.000 SDTV 576P 7. 1280 x 720 44.96 59.94 74.176 HDTV 720P 8. 1280 x 720 45.00 60.00 74.
11. HDMI Input ( PC ) No Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Remarks 1 720 x 400 31.469 70.08 28.32 DOS 2 640 x 480 31.469 59.94 25.17 VESA(VGA) 3 640 x 480 37.500 75.00 31.50 VESA(VGA) 4 800 x 600 37.879 60.31 40.00 VESA(SVGA) 5 800 x 600 46.875 75.00 49.50 VESA(SVGA) 6. 832 x 624 49.725 74.55 57.28 Macintosh 7 1024 x 768 48.363 60.00 65.00 VESA(XGA) 8 1024 x 768 56.476 70.06 75.00 VESA(XGA) 9 1024 x 768 60.023 75.02 78.
ADJUSTMENT INSTRUCTION 1. Application Range 4. EDID This spec. sheet is applied to all of the LP62A/B/C chassis(H3-High) manufactured at LG TV Plant all over the world. 2. Specification 2.1 Because this is not a hot chassis, it is not necessary to use an isolation transformer. However, the use of isolation transformer will help to protect test instruments. 2.2 Adjustment must be done in the correct sequence. 2.
Master pattern generator like MSPG-925) - If Minimum Black Level and/or Maximum White Level is not correct, Do select 100% Color Bar Pattern. d. Model Name/Monitor Name: Model Name 37LC2R-TH 00 00 00 FC 00 33 37 4C 43 32 52 2D 54 48 0A 20 20 20 42LC2R-TH 00 00 00 FC 00 34 32 4C 43 32 52 2D 54 48 0A 20 20 20 e. Checksum: Changeable by total EDID data 5. ADC Calibration 5.
=> Caution : Before White-balance, the AV ADC should be done. (ZH:AV3, TH:AV1, MH:VIDEO1) => After Aging, When the procedure is changed White balance adjustment, it will be canceled Heat_run mode auto. (Notice : Before White-balance, change input mode Move to AV3(ZH) or AV1(TH) or VIDEO1(MH) by using the FRONT-AV KEY on Remote controller.) 6. White Balance White balance MSPG925FA ZH(AV3), TH(AV1) MH(VIDEO1) 216 Level (85IRE) Model : 202 Model : 201 Full screen pattern • Pal Video • NTSC Video 6.
7.
SVC REMOCON NO 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 KEY FUNTION REAMARK To turn the TV on or off To turn the TV on automatically if the power is supplied to the TV. (Use the POWER ON POWER key to deactivate): It should be deactivated when delivered. To activate the mute function. MUTE To check TV screen image easily.
- 16 - No Manufacture enterprise meaning of a passage No High tension output Voltage drop it occurs? No Doesn’t the high tension output come out? No Doesn’t the low pressure output come out? No Doesn’t the screen whole come out? Start check 1. No power Yes Yes Yes Yes 9. Check the power board output high tension circuit Yes 10.
- 17 - After remove the cable connect to Power Board(except the CN101 connection cable), authorizes the AC voltage marking on manual. When ST-BY 5V does not operate, replace Power Board. Yes Is it connect that PSU and 13Pin cable in VSC board? Yes Is the Fuse(F101) of PSU is normal? Yes Is the Line Filter and PSU connected? Yes Is the Power Cord plug in ? (2). Check follow (1) Symptom 1) Minute discharge doesn’t occur at module. 2) Front LED doesn’t come into action 2-1. No Power 2.
- 18 - Is the VSC Board normal? Yes Is the Power Board normal? Yes Is the link cable normal? On Is the Inverter On or Off (2) Check follow No No No Off Is the P804's output normal? 1. Check the Main Board. Yes Is output the normality Low/High voltage except stand-by 5V? No No No 1. Reconnect the link cable in P804 1. Check the Inverter connector 2. Check the LCD Module Yes Is the inverter 24V on power board normal (1) Symptom 1) Does’t minute discharge at module.
- 19 - Yes Is the VSC Board normal? Yes Is the LVDS cable normal? (2) Check follow No No Is the LCD Module normal? LCD TV Yes Yes Is the Ctrl Board of Module normal? Replace FIL8668 IC(IC800). No IC800' operation is normal? Cable inserts well. No Is the LVDS cable connected well? Plasma No No 2-3-1. In case of doesn’t display the OSD (1) Symptom 1) LED is White 2) The minute discharge work continuously 2-3.
- 20 - Is the IC800 normal? Yes Is the IC300 normal? Yes Is the Tuner normal? No No No Is the Input voltage, IIC Communication and HV sync normal? Is the Input voltage, IIC Communication and HV sync normal? Cable inserts well. No Is the Tuner Cable connected well? (3) In case of unusual situation from RF mode No No No (2) Check follow 1) Check the all input model if all input display normally. 2) Check the PIP and Double Window if it display normally.
- 21 - No No Is the Input voltage, IIC Communication and HV sync normal? Is the Input voltage, IIC Communication and HV sync normal? No Is the Input voltage, IIC Communication and HV sync normal? Is the IC800 normal? Yes Is the IC1200 normal? No No Is the Input voltage, IIC Communication and HV sync normal? Is the Input voltage, IIC Communication and HV sync normal? (6) In the case of becomes unusual display from HDMI mode Is the IC800 normal? (5) When set doesn't display nromally at Compone
- 22 - Only RF is no sound? Yes Only AV input is no sound? Yes Only HDMI is no sound? Yes All input(mode) is no sound? (2) Check follow No No No No No Is the Speaker on in Menu? Yes Yes Check the Tuner In/Out Check the signal after IC300 refer to circuit diagram. No Is the output 52nd&53rd of IC300 normal? Download the EDID data Set on speaker in menu (1) Symptom 1) LED is White 2) Screen existent, but Sound isn’t 2-4.
BLOCK DIAGRAM - 23 -
- 24 - 010 060 050 080 020 090 070 100 110 111 120 130 140 150 EXPLODED VIEW (37LC2R) 160 030 040
EXPLODED VIEW PARTS LIST(37LC2R) No. 010 DESCRIPTION PART NO.
- 26 - EXPLODED VIEW(42LC2R)
EXPLODED VIEW PARTS LIST(42LC2R) No. DESCRIPTION PART NO. 010 30919E0047H Cover Assembly, 42LC2R BRAND 30909E0028 ZH C/SKD 020 6304FLP363A LCD,Panel-TFT, LC420W02-SLA1 42INCH 1365X768 500CD COLOR 72% - or 6304FLP353A LCD,Panel-TFT, LC420W02-B6K2 42INCH 1365X768 500CD COLOR 72% - 030 3809900165L Cover Assembly, 42LC2R HURRICANE 42" SPRAY 040 3043900034C Base Assembly, 42LC2 42LC2 FOR USA C/SKD 050 68719ST997B PCB Assembly,Sub, SUB T.
REPLACEMENT PARTS LIST For Capacitor & Resistors, the charactors at 2nd and 3rd digit in the P/No. means as follows; *S *AL LOC. NO. PART NO. CC, CX, CK, CN, CH : Ceramic CQ : Polyestor CE : Electrolytic CF : Fixed Film DATE: 2006. 04. 05. DESCRIPTION / SPECIFICATION *S *AL LOC. NO.
*S *AL LOC. NO. C898 C901 C904 C905 C930 C943 C950 C1813 C1031 C210 C237 C1108 C1112 C1428 C1446 C1003 C1026 C1029 C1033 C1034 C1036 C1037 C1041 C1071 C1117 C1118 C1126 C1127 C1223 C1224 C1225 C1228 C1405 C1419 C1420 C1421 C1422 C1455 C1456 C1457 C1458 C1459 C1474 C1811 C1851 C234 C312 C313 C319 C321 C322 C326 C327 C328 C329 C330 C331 C332 C333 C334 C335 C336 PART NO.
*S *AL LOC. NO. C874 C881 C1000 C1002 C1004 C1006 C1008 C1010 C1011 C1013 C1015 C1017 C1018 C1021 C1024 C1025 C1027 C1028 C1030 C1035 C1039 C1040 C1042 C1044 C1045 C1046 C1047 C1058 C1059 C1060 C1061 C1066 C1068 C1073 C1074 C1075 C1076 C1077 C1078 C1079 C1080 C1081 C1082 C1083 C1090 C1091 C1100 C1102 C1103 C1104 C1105 C1106 C1114 C1115 C1116 C1119 C1120 C1121 C1122 C1123 C1124 C1125 PART NO.
*S *AL LOC. NO. C1461 C1466 C1467 C1469 C147 C1470 C1473 C1475 C1476 C150 C151 C152 C178 C1800 C1801 C1802 C1803 C1804 C1805 C1806 C1807 C1808 C1809 C1810 C1812 C1815 C1852 C218 C219 C220 C221 C222 C223 C225 C226 C229 C231 C233 C315 C320 C348 C350 C352 C353 C356 C406 C407 C408 C415 C434 C436 C437 C444 C445 C469 C479 C483 C493 C495 C502 C503 C506 PART NO.
*S *AL LOC. NO. C910 C911 C912 C913 C914 C915 C916 C917 C918 C919 C920 C921 C922 C923 C924 C925 C926 C927 C928 C929 C931 C932 C933 C934 C935 C936 C937 C938 C939 C940 C941 C942 C944 C949 C951 C1827 C1828 C1829 C1830 C1831 C805 C809 C810 C1032 C200 C201 C206 C207 C208 C209 C228 C1426 C1427 PART NO.
*S *AL LOC. NO. L1404 L1405 L1406 L1407 AR1200 AR1201 AR1202 AR1203 AR1204 AR1205 L1005 L1005 L1006 L1006 L1008 L1008 L1011 L1011 L1016 L1016 L1017 L1017 L1018 L1018 L1019 L1019 L1020 L1020 L1022 L1022 L1102 L1102 L1109 L1109 L1111 L1111 L1116 L1116 L309 L309 L310 L401 L401 L502 L502 L600 L600 L901 L901 L902 L902 L1001 L1001 L1002 L1002 L1004 L1004 L1012 L1012 L1013 L1013 L1014 PART NO.
*S *AL LOC. NO. L207 L120 L121 L122 L123 L206 L311 L407 L408 L204 PART NO. 0LC6461201A 0LCML00020G 0LCML00020G 0LCML00020G 0LCML00020G 0LCML00020G 0LCML00020C 0LCML00020C 0LCML00020C 0LCML00020G DATE: 2006. 04. 05. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. D75C-646CY-121M=P3 120UH 20 MLI-201209-3R3K 3.3UH 10% MLI-201209-3R3K 3.3UH 10% MLI-201209-3R3K 3.3UH 10% MLI-201209-3R3K 3.3UH 10% MLI-201209-3R3K 3.
*S *AL LOC. NO. R1442 R1447 R1450 R1451 R1452 R1458 R1460 R1461 R1463 R1465 R1466 R1469 R1802 R1803 R1807 R1808 R1814 R1815 R1816 R1817 R1818 R1819 R1820 R1821 R1822 R1823 R1825 R1866 R1867 R1889 R247 R306 R311 R312 R313 R314 R315 R316 R317 R318 R319 R320 R322 R323 R324 R326 R329 R330 R333 R334 R335 R336 R337 R338 R339 R340 R341 R342 R343 R344 R345 R346 PART NO.
*S *AL LOC. NO. R609 R619 R621 R800 R810 R814 R818 R819 R821 R829 R830 R833 R835 R836 R837 R839 R840 R841 R844 R845 R846 R847 R849 R852 R853 R861 R862 R863 R864 R867 R868 R870 R871 R872 R873 R874 R878 R879 R880 R881 R882 R883 R884 R885 R889 R890 R891 R892 R893 R894 R905 R906 R907 R909 R910 R911 R912 R917 R918 R921 R922 R937 PART NO.
*S *AL LOC. NO. R184 R1842 R1843 R1844 R1845 R1846 R1847 R1848 R1849 R1850 R1851 R1852 R1853 R1854 R1855 R1856 R1857 R186 R1864 R1865 R1868 R1869 R1870 R1873 R1874 R1875 R1878 R1879 R188 R1880 R1881 R189 R198 R199 R208 R209 R210 R2100 R2101 R2102 R2105 R2106 R2108 R2109 R211 R2112 R2113 R2114 R2115 R2116 R212 R213 R214 R215 R216 R217 R218 R219 R220 R221 R222 R223 PART NO.
*S *AL LOC. NO. R512 R513 R514 R515 R519 R522 R523 R531 R532 R533 R534 R540 R541 R542 R544 R604 R605 R606 R809 R834 R838 R842 R851 R854 R855 R857 R859 R860 R865 R866 R875 R876 R877 R886 R887 R888 R900 R904 R908 R914 R915 R919 R920 R923 R924 R934 R824 R826 R828 L129 L130 L131 R175 R176 R177 R178 R179 R193 R194 R2107 R2803 R1810 PART NO. DATE: 2006. 04. 05.
*S *AL LOC. NO. R107 R108 PART NO. 0RH1501D622 0RH0000D622 DATE: 2006. 04. 05. DESCRIPTION / SPECIFICATION MCR10EZHJ152 1.
P/NO : MFL30105507 Mar.
