LG 37LC2R Series Service Manual Download Page 1

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LCD TV

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS : LP62C
FACTORY MODEL : 37LC2R-TH / 42LC2R-TH

MODEL : 37LC2R / 42LC2R

website:http://biz.LGservice.com

e-mail:http://www.LGEservice.com/techsup.html

Summary of Contents for 37LC2R Series

Page 1: ...L CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS LP62C FACTORY MODEL 37LC2R TH 42LC2R TH MODEL 37LC2R 42LC2R website http biz LGservice com e mail http www LGEservice com techsup html ...

Page 2: ... 2 CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 11 TROUBLE SHOOTING 16 BLOCK DIAGRAM 23 EXPLODED VIEW 25 REPLACEMENT PARTS LIST 28 SVC SHEET ...

Page 3: ...et such as antennas terminals etc to be sure the set is safe to operate without damage of electrical shock Leakage Current Cold Check Antenna Cold Check With the instrument AC plug removed from AC source connect an electrical jumper across the two AC plug prongs Place the AC switch in the on position connect one lead of ohm meter to the AC plug prongs tied together and touch other ohm meter lead i...

Page 4: ...vely obtain and wear a commercially available discharging wrist strap device which should be removed to prevent potential shock reasons prior to applying power to the unit under test 2 After removing an electrical assembly equipped with ES devices place the assembly on a conductive surface such as aluminum foil to prevent electrostatic charge buildup or exposure of the assembly 3 Use only a ground...

Page 5: ...not shiny reheat them and if necessary apply additional solder Fuse and Conventional Resistor Removal Replacement 1 Clip each fuse or resistor lead at top of the circuit board hollow stake 2 Securely crimp the leads of replacement component around notch at stake top 3 Solder the connections CAUTION Maintain original spacing between the replaced component and adjacent components and the circuit boa...

Page 6: ...C Specification EMC CE IEC SPECIFICATION NOTE Specifications and others are subject to change without notice for improvement 4 General TV Specification No Item Specification Remark 1 Video input applicable system PAL D K B G I NTSC M SECAM NTSC 4 43 2 Receivable Broadcasting System 1 PAL SECAM BG 2 PAL SECAM DK 3 PAL I I 4 SECAM L L only ZH 5 PAL N M 6 NTSC M only TH 3 RF Input Channel VHF E2 E12 ...

Page 7: ...RGB strip arrangement Coating Hard coating 3H Anti glare treatment of the front polarizer Back Light 37 16CCFL 42 20CCFL No Parameter Symbol Value Unit Remark Min Typ Max 1 Contrast Ratio CR 37 800 1200 Normal Mode 42 700 1000 100IRE Full white window pattern APC Clear Dynamic 2 Surface Luminance LWH 360 450 Cd m2 Normal Mode white 100IRE Full white window pattern APC Clear Dynamic 3 White Coordin...

Page 8: ...00 9300 10300 85IRE Full White Pattern Warm 6200 7200 8200 APC Standard Cool 10000 11000 12000 5 Color pull in Range PAL 500 500 Hz NTSC 500 500 Hz 6 Color killer Sensitivity 80 dBm 7 Model Specification No Item Specification Remark 1 Market N EU 2 Broadcasting system PAL BG I DK NTSC M 3 Available Channel BAND PAL NTSC VHF UHF C1 C69 2 83 CATV S1 S47 1 71 4 Receiving system Upper Heterodyne 5 SCA...

Page 9: ...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 75 VESA XGA 10 1280 x 768 47 693 59 99 80 125 WXGA 42XGA 50 60 11 1360 x 768 47 70...

Page 10: ...2R No Resolution H freq kHz V freq kHz Pixel clock MHz Remarks 1 720 x 480 31 47 59 94 27 000 SDTV 480P 2 720 x 480 31 50 60 00 27 027 SDTV 480P 3 720 x 576 31 25 50 00 27 000 SDTV 576P 4 1280 x 720 44 96 59 94 74 176 HDTV 720P 5 1280 x 720 45 00 60 00 74 250 HDTV 720P 6 1280 x 720 37 50 50 00 74 25 HDTV 720P 50Hz 7 1920 x 1080 33 72 59 94 74 176 HDTV 1080I 8 1920 x 1080 33 75 60 00 74 250 HDTV 10...

Page 11: ... Use the proper cables below for EDID Writing 4 1 EDID Data 4 1 1 ANALOG 256 Bytes BLOCK1 128BYTE 4 1 2 HDMI 256 Bytes BLOCK1 128BYTE BLOCK2 128BYTE Detail EDID Options are below a b c d e a Product ID b Serial No Controlled on production line c Month Year Controlled on production line ex Montly 03 03 Year 2005 0F 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 00 00 FF FF FF FF FF FF 00 1E 6D 10 ...

Page 12: ...when using Master pattern generator like MSPG 925 If Minimum Black Level and or Maximum White Level is not correct Do select 100 Color Bar Pattern Fig 2 5 2 1 Method of Auto Component Color Balance 1 Input the Component 720p 100 Color Bar MSPG 925FA model 217 pattern 33 signal into Component ZH component TH MH component 1 or 2 2 Set the PSM to Standard mode in the Picture menu 3 Press the INSTART ...

Page 13: ... 50Hz 32LB1R TH AV1 AV2 Input 50Hz 4 Press the FRONT AV KEY on R C for converting input mode 5 Set the PSM to Standard mode in Picture menu 6 Enter the White Balance adjustment mode by pressing the INSTART key twice White Balance on R C 7 Stick sensor to center of the screen and select each items Red Green Blue Gain and Offset using CH key on R C 8 Adjust Only High Light with R Gain B Gain using V...

Page 14: ...me None 8 Picture PSM Dynamic Dynamic Contrast 100 Brightness 50 Colour 50 Sharpness 50 CSM Normal XD Auto Advanced Reset 9 Sound SSM Flat Off AVL Off Balance 0 50 50 Speaker On 10 Time Clock User control Off time Off On time Off Auto sleep Off 11 Special Language English Area management Child Lock Off Set ID 1 XD Demo To start 12 Screen Auto config Manual config XGA VGA mode Variable by each mode...

Page 15: ...put To check the front AV To move channel up down or to select a function displayed on the screen To adjust the volume or accurately control a specific function To set a specific function or complete setting To move the channel down in the PIP screen To use as a red key in the teletext mode To move the channel in the PIP screen To use as a green key in the teletext mode To switch between the main ...

Page 16: ...e output circuit Yes No Yes No No No Doesn t the screen whole come out It is identical with power off condition Is the Interface signal operated Doesn t the 5V monitor signal come out Doesn t the VSC signal RL_ON come out Doesn t the VSC Low pressure output come out Doesn t the Vs Va voltage output come out Doesn t the St by 5V signal come out Doesn t the VSC signal Vs ON come out When remove the ...

Page 17: ...ord No No No No Yes Is the Line Filter and PSU connected Connect Cable SC101 Yes Is the Fuse F101 of PSU is normal Replace Fuse Yes Is it connect that PSU and 13Pin cable in VSC board 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 Connect Cable Yes ...

Page 18: ...o No No Is output the normality Low High voltage except stand by 5V No Inverter_On Signal is High of 5 th pin in P1000 on Main board Yes On Yes Is the link cable normal 1 Check the Inverter connector 2 Check the LCD Module Yes 1 Check the Main Board 1 Reconnect the link cable in P804 No 1 Check the Main board 1 Change the Power Board 1 Change the Main Board Yes Is the Power Board normal Yes Is the...

Page 19: ...Replace VSC B D No No Yes Replace Ctrl Board in Plasma panel No Replace LCD Module No Yes Yes Is the LCD Module normal Yes Plasma LCD TV No Cable inserts well No Replace FIL8668 IC IC800 2 3 In case of occur strange screen into specific mode 2 3 1 In case of doesn t display the OSD 1 Symptom 1 LED is White 2 The minute discharge work continuously 2 Check follow ...

Page 20: ...uble Window if it display normally Re Check it Swap 3 In case of unusual situation from RF mode Is the Tuner normal No Yes Yes Cable inserts well Replace Tuner Replace IC300 Is the Tuner Cable connected well No Is the Input voltage IIC Communication and HV sync normal No No Is normal the Input voltage IIC Communication and CVBS output No No Is the IC300 normal Replace IC800 No Is the Input voltage...

Page 21: ...HV sync normal No Is the IC1200 normal Replace IC800 No Is the Input voltage IIC Communication and HV sync normal No Is the IC800 normal Replace IC800 No Is the Input voltage IIC Communication and HV sync normal No Is the IC800 normal Yes Replace IC300 No Is the Input voltage IIC Communication and HV sync normal No Is the IC300 normal Replace IC800 No Is the Input voltage IIC Communication and HV ...

Page 22: ... IC300 Replace VSC B D Set on speaker in menu Download the EDID data Check the speaker cable No Only RF is no sound Check the Tuner In Out No No No Replace IC402 No Is the Speaker on in Menu Yes No No Check the signal after IC300 refer to circuit diagram Is the output 52nd 53rd of IC300 normal Yes Yes Yes Yes Is the speaker cable normal Yes Yes Yes Yes IC400 operate normally IC401 operate normally...

Page 23: ...BLOCK DIAGRAM 23 ...

Page 24: ... 24 EXPLODED VIEW 37LC2R 010 020 070 111 110 120 130 140 150 160 100 090 080 060 050 040 030 ...

Page 25: ...REAMP LED LC 49509K0222A Plate PRESS SBHG T2 0 SUPPORT STAND 37LC2 35509K0217A Cover MOLD HIPS 37LC2 STAND MID INNER 49509K0341C Plate PRESS EGI 1 6 SUPPORTER SPC AUO SIDE FRAME RIGHT C SKD 49509K0340D Plate PRESS EGI 1 6 SUPPORTER SPC 37LC2R AUO 49509K0341E Plate PRESS EGI 1 6 SUPPORTER SPC AUO SKD For Thailand Vietnam 49509K0340C Plate PRESS EGI 1 6 SUPPORTER SPC SIDE FRAME AUO LEFT C SKD 49509K...

Page 26: ... 26 EXPLODED VIEW 42LC2R ...

Page 27: ... Plate SHIELD MAIN ANALOG 42LC2R TH C SKD 010 020 030 040 050 060 061 070 080 090 100 110 120 130 140 27 EXPLODED VIEW PARTS LIST 42LC2R No PART NO DESCRIPTION 30919E0047H Cover Assembly 42LC2R BRAND 30909E0028 ZH C SKD 6304FLP363A LCD Panel TFT LC420W02 SLA1 42INCH 1365X768 500CD COLOR 72 or 6304FLP353A LCD Panel TFT LC420W02 B6K2 42INCH 1365X768 500CD COLOR 72 3809900165L Cover Assembly 42LC2R H...

Page 28: ...DC MVK6 3TP16VC47M 47uF 20 16 C1158 0CE476WF6DC MVK6 3TP16VC47M 47uF 20 16 C1207 0CE476SF6DC VMV476M016S0ANC010 47uF 20 C1222 0CE106SH6DC VMV106M025S0ANB010 10uF 20 C1226 0CE106SH6DC VMV106M025S0ANB010 10uF 20 C1244 0CE106SH6DC VMV106M025S0ANB010 10uF 20 C1403 0CH8106J691 MVK5 0TP35VC10M 10uF 20 35 C1460 0CE106SH6DC VMV106M025S0ANB010 10uF 20 C1468 0CE106SH6DC VMV106M025S0ANB010 10uF 20 C148 0CE22...

Page 29: ...225DFK4A C2012Y5V1C225MT 2 2uF 20 1 C335 0CK474CH94A 0603F474Z250CT 470nF 20TO C336 0CK225DFK4A C2012Y5V1C225MT 2 2uF 20 1 DATE 2006 04 05 S AL LOC NO PART NO DESCRIPTION SPECIFICATION C337 0CK474CH94A 0603F474Z250CT 470nF 20TO C338 0CK474CH94A 0603F474Z250CT 470nF 20TO C339 0CK225DFK4A C2012Y5V1C225MT 2 2uF 20 1 C340 0CK474CH94A 0603F474Z250CT 470nF 20TO C341 0CK474CH94A 0603F474Z250CT 470nF 20TO...

Page 30: ...0CT 10nF 10 50V C1124 0CK103CK56A 0603B103K500CT 10nF 10 50V C1125 0CK103CK56A 0603B103K500CT 10nF 10 50V DATE 2006 04 05 S AL LOC NO PART NO DESCRIPTION SPECIFICATION C1134 0CK104CK56A 0603B104K500CT 100nF 10 50 C1136 0CK104CK56A 0603B104K500CT 100nF 10 50 C1138 0CK104CK56A 0603B104K500CT 100nF 10 50 C1139 0CK103CK56A 0603B103K500CT 10nF 10 50V C1140 0CK104CK56A 0603B104K500CT 100nF 10 50 C1141 0...

Page 31: ...03K500CT 10nF 10 50V C503 0CK103CK56A 0603B103K500CT 10nF 10 50V C506 0CC120CK41A C1608C0G1H120JT 12pF 5 50V DATE 2006 04 05 S AL LOC NO PART NO DESCRIPTION SPECIFICATION C514 0CK104CK56A 0603B104K500CT 100nF 10 50 C603 0CC221CK41A C1608C0G1H221JT 220pF 5 50 C608 0CK104CK56A 0603B104K500CT 100nF 10 50 C609 0CC470CK41A C1608C0G1H470JT 47pF 5 50V C624 0CK104CK56A 0603B104K500CT 100nF 10 50 C816 0CK1...

Page 32: ...V 300MA 2A 4N D500 0DS226009AA KDS226 1 2V 85V 300MA 2A 4N D501 0DS226009AA KDS226 1 2V 85V 300MA 2A 4N DATE 2006 04 05 S AL LOC NO PART NO DESCRIPTION SPECIFICATION D502 0DS226009AA KDS226 1 2V 85V 300MA 2A 4N D1000 0DS226009AA KDS226 1 2V 85V 300MA 2A 4N D1001 0DS226009AA KDS226 1 2V 85V 300MA 2A 4N D1002 0DS226009AA KDS226 1 2V 85V 300MA 2A 4N D1004 0DS226009AA KDS226 1 2V 85V 300MA 2A 4N D1005...

Page 33: ... 2X SKD L1013 6200J000013 MLB 321611 0500P N2 500OHM CKD L1013 6210TCE001G HH 1M3216 501JT 500OHM 3 2X SKD L1014 6200J000013 MLB 321611 0500P N2 500OHM CKD DATE 2006 04 05 S AL LOC NO PART NO DESCRIPTION SPECIFICATION L1014 6210TCE001G HH 1M3216 501JT 500OHM 3 2X SKD L1015 6200J000013 MLB 321611 0500P N2 500OHM CKD L1015 6210TCE001G HH 1M3216 501JT 500OHM 3 2X SKD L1021 6200J000013 MLB 321611 0500...

Page 34: ...HM 5 1 16W AR805 0RJ0332C687 RCA86TRJ33R0 33OHM 5 1 16W AR806 0RJ0332C687 RCA86TRJ33R0 33OHM 5 1 16W AR807 0RJ0332C687 RCA86TRJ33R0 33OHM 5 1 16W R226 0RD0331H609 RD 92T1J3R30 3 3OHM 5 1 2W C832 0CK104CK56A 0603B104K500CT 100nF 10 50 CKD C832 0RJ0000D677 MCR03EZPJ000 0OHM 5 1 10W SKD L1853 0RJ0000D677 MCR03EZPJ000 0OHM 5 1 10W L1856 0RJ0000D677 MCR03EZPJ000 0OHM 5 1 10W R1002 0RJ1801D677 MCR03EZPJ...

Page 35: ...MCR03EZPJ102 1KOHM 5 1 10W R345 0RJ1000D677 MCR03EZPJ101 100OHM 5 1 10 R346 0RJ1201D677 MCR03EZPJ122 1 2KOHM 5 1 1 DATE 2006 04 05 S AL LOC NO PART NO DESCRIPTION SPECIFICATION R347 0RJ1000D677 MCR03EZPJ101 100OHM 5 1 10 R348 0RJ1201D677 MCR03EZPJ122 1 2KOHM 5 1 1 R349 0RJ1000D677 MCR03EZPJ101 100OHM 5 1 10 R350 0RJ1001D677 MCR03EZPJ102 1KOHM 5 1 10W R352 0RJ1201D677 MCR03EZPJ122 1 2KOHM 5 1 1 R35...

Page 36: ...77 MCR03EZPJ220 22OHM 5 1 10W R937 0RJ0222D677 MCR03EZPJ220 22OHM 5 1 10W DATE 2006 04 05 S AL LOC NO PART NO DESCRIPTION SPECIFICATION R938 0RJ0222D677 MCR03EZPJ220 22OHM 5 1 10W R940 0RJ0222D677 MCR03EZPJ220 22OHM 5 1 10W L126 0RH0000D622 MCR10EZHJ000 0OHM 5 1 8W 2 L127 0RH0000D622 MCR10EZHJ000 0OHM 5 1 8W 2 L128 0RH0000D622 MCR10EZHJ000 0OHM 5 1 8W 2 L1852 0RJ0000D677 MCR03EZPJ000 0OHM 5 1 10W ...

Page 37: ...0000D677 MCR03EZPJ000 0OHM 5 1 10W R222 0RJ1000D677 MCR03EZPJ101 100OHM 5 1 10 R223 0RJ1001D677 MCR03EZPJ102 1KOHM 5 1 10W DATE 2006 04 05 S AL LOC NO PART NO DESCRIPTION SPECIFICATION R224 0RJ4701D677 MCR03EZPJ472 4 7KOHM 5 1 1 R225 0RJ2000D677 MCR03EZPJ201 200OHM 5 1 10 R227 0RJ2700D677 MCR03EZPJ271 270OHM 5 1 10 R228 0RJ2200D677 MCR03EZPJ221 220OHM 5 1 10 R229 0RJ1001D677 MCR03EZPJ102 1KOHM 5 1...

Page 38: ... R194 0RJ1001D677 MCR03EZPJ102 1KOHM 5 1 10W R2107 0RJ1002D677 MCR03EZPJ103 10KOHM 5 1 10 R2803 0RJ1002D677 MCR03EZPJ103 10KOHM 5 1 10 R1810 0RJ4701D677 MCR03EZPJ472 4 7KOHM 5 1 1 42LC2R DATE 2006 04 05 S AL LOC NO PART NO DESCRIPTION SPECIFICATION L1819 0RJ0000D677 MCR03EZPJ000 0OHM 5 1 10W L1820 0RJ0000D677 MCR03EZPJ000 0OHM 5 1 10W L1821 0RJ0000D677 MCR03EZPJ000 0OHM 5 1 10W L1822 0RJ0000D677 M...

Page 39: ...2 R201 0RH0000D622 MCR10EZHJ000 0OHM 5 1 8W 2 R202 0RH4700D622 MCR10EZHJ471 470OHM 5 1 8W R203 0RH0000D622 MCR10EZHJ000 0OHM 5 1 8W 2 R204 0RH4700D622 MCR10EZHJ471 470OHM 5 1 8W R205 0RH0000D622 MCR10EZHJ000 0OHM 5 1 8W 2 R206 0RH0000D622 MCR10EZHJ000 0OHM 5 1 8W 2 R207 0RJ1001D677 MCR03EZPJ102 1KOHM 5 1 10W R208 0RH4700D622 MCR10EZHJ471 470OHM 5 1 8W D200 0DLAU0410AA SAW5670 ROUND 5mM AMBER WHI I...

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Page 44: ...Mar 2006 Printed in Korea P NO MFL30105507 ...

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