LG 42LB5RT Service Manual Download Page 52

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Summary of Contents for 42LB5RT

Page 1: ...LCD TV SERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS LP7BA MODEL 42LB5RT 42LB5RT TB website http biz LGservice com ...

Page 2: ...2 CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 10 TROUBLE SHOOTING 14 BLOCK DIAGRAM 26 EXPLODED VIEW 28 EXPLODED VIEW PARTS LIST 29 REPLACEMENT PARTS LIST 30 SVC SHEET ...

Page 3: ...witch in the on position connect one lead of ohm meter to the AC plug prongs tied together and touch other ohm meter lead in turn to each exposed metallic parts such as antenna terminals phone jacks etc If the exposed metallic part has a return path to the chassis the measured resistance should be between 1MΩ and 5 2MΩ When the exposed metal has no return path to the chassis the reading must be in...

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: ...od followed 2 Demanded other specification Safety CE IEC 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 PAL 60 2 Receivable Broadcasting System 1 PAL SECAM BG 2 PAL SECAM DK 3 PAL I I I 4 NTSC 3 RF Input Chann...

Page 7: ...00 x RGB Pixel Format 1366 x 768 Pixels RGB strip arrangement Coating Hard coating 3H Anti glare treatment of the front polarizer Back Light 42 18CCFL 37 16CCFL 6 Set Optical Feature No Item Min Typ Max Unit Maker Remark 1 Luminance AV 100IRE Full white window Componet 350 450 LPL 0RT 37 42 pattern HDMI APC Dynamic PC 250 350 2 Contrast ratio CR 700 900 37 APC Dynamic 800 1000 42 HDMI 720p Full Bl...

Page 8: ...ks 1 720 400 31 469 70 08 28 32 DOS 2 640 480 31 469 59 94 25 17 VESA VGA 3 640 480 37 500 75 00 31 50 VESA VGA 4 800 600 37 879 60 31 40 00 VESA SVGA 5 800 600 46 875 75 00 49 50 VESA SVGA 6 1024 768 48 363 60 00 65 00 VESA XGA 7 1024 768 56 476 70 06 75 00 VESA XGA 8 1024 768 60 023 75 02 78 75 VESA XGA 9 1280 768 47 693 59 99 80 125 WXGA 42XGA 50 60 10 1360 768 47 700 60 00 84 62 WXGA 42XGA 50 ...

Page 9: ... 74 250 HDTV 1080I 9 1920 1080 28 125 50 00 74 250 HDTV 1080I 50Hz 10 1920 1080 67 5 60 00 148 5 HDTV 1080P 11 1920 1080 56 25 50 148 5 HDTV 1080P 50Hz No Item Content Remark 1 Product Dimension Width Length Height Unit Before Packing 1033 288 750 mm SET With Stand After Packing 1119 374 858 mm 2 Product Weight Only SET 29 Kg With BOX 31 Kg No Item Content Remark 1 Product Dimension Width Length H...

Page 10: ...Adjust Remocon 2 Input the Option Number that was specified in the BOM into the Shipping area 3 Select Tool Option1 Tool Option2 Area Option by using CH key and press the number key 0 9 consecutively ex If the value of Tool Option1 is 7 input the data using number key 7 Fig 1 4 SET assembly adjustment items Auto AV Color Balance Adjustment of White Balance Auto Component Color Balance adjustment S...

Page 11: ...100 Color Bar Pattern shown in Fig 2 Model 202 Pattern 65 Fig 2 7 1 1 Method of Auto RF AV S VIDEO Color Balance 1 Press the FRONT AV KEY on R C for converting input mode 2 Input the Video Signal 100 Color Bar signal into AV 3 Set the PSM to Dynamic mode in the Picture menu 4 Press INSTART key on R C for adjustment 5 Press the Vol key to operate the set then it becomes automatically 6 Auto RGB OK ...

Page 12: ... Press the Vol key to operate the set then it becomes automatically 5 Auto RGB OK means the adjustment is completed 7 3 Adjustment of RGB Required Equipments Remote controller for adjustment 802F Pattern Generator Master MSPG 925FA etc MSPG 925FA Pattern Generator Which has XGA 1024 768 60Hz PC Format output signal 100 Color Bar Pattern shown in Fig 4 It is very import to use correct adjustment pa...

Page 13: ... 115200 Pattern Generator MSPG 925FA etc Color Temperature Color Coordinates Setting When adjusting the Color Temperature of LCD Color AnalyzerCA 210 Matrix should be corrected through CH9 of CS 1000 should be used When adjusting the Color Temperature of PDP Color AnalyzerCA 210 Matrix should be corrected through CH10 of CS 1000 should be used Adjust the Color Temperature based below adjustment co...

Page 14: ...and PSU Is normal the fuse of PSU Plasma F101 LCD F111 Plug in a power cord Connect a cable Plasma EL1 1 LC D SC100 Replace the fuse Is it connected tha t PSU and 13 pin cable in VSC board Connect the 13pin cable YE S YE S YE S YE S NO NO NO NO After re mo ve all cab les con nec ted to PSU except the C N101 author izes the AC vo ltage marking on manual W hen ST b y 5V doesn t operate replace PSU ...

Page 15: ... normality it operates Replace the power board Is no rmal the output voltage after remove P1 connector of Y B D Replace Y B D Is no rmal the fuse FS2 FS3 on Y B D Replace the fuse Is the Z Board no rmal Is no rmal the output vo ltage after remove P1 connector of Z B D Replace Z B D Is no rmal the fuse FS1 FS2 on Z B D Replace the fuse Is t he X Board no rmal After remove P100 110 output voltage no...

Page 16: ...green Start check Is the link cable normal Reconnect the link cable in P600 NO Is the IC700 s output normal NO Replace the VSC Does minute discharge at Module NO Is the inverter VaV s on Check the PDP LCD Module Is output the normality Lo w High Voltage except Stand by 5V Replace the power board YE S YE S YE S NO ...

Page 17: ...Input voltage Check Pin8 Pin6 Is normal video output of CXA2069Q Check R324 In case of S Video check R324 R328 Is the Tuner Cable connected well Change the Tuner Check the power Cable inserts well Is normal the I2C communication Check R309 R310 Change the IC IC300 Check the power Check L1004 Change the IC IC700 Is the LVDS Cable connected well Cable inserts well NO NO NO YE S NO YE S YES YE S YE S...

Page 18: ...o mode main 7 In the case of becomes unusual display from side AV mode main Is normal video input of the A V jack Is normal video input of the A V jack Is normal video input of the A V jack Check the input source Same as Block A Same as Block A Same as Block A Check the input source Check the input source YES NO YES NO YES NO ...

Page 19: ... becomes unusual display from SCART 1_RGB mode main Is normal video input of the A V jack Check R339 R341 L310 Check the input source Is normal video input of the A V jack Check L111 L112 L106 Is normal video input of the A V jack Check R102 Same as Block A Check the input source Check the input source Same as Block A Same as Block A YES NO YES NO YES NO ...

Page 20: ...ain 12 In the case of becomes unusual display from SCART 2_YC mode main Is normal video input of the A V jack Check R115 Check the input source Is normal video input of the A V jack Check R115 R149 Check the input source Same as Block A Same as Block A YES NO YES NO ...

Page 21: ...l Is normal the Input voltage Check Pin8 Pin6 Is normal the Input voltage Check L308 Is normal the I2C communication Check R309 R310 Change the IC IC300 Check the power Check L1004 Change the IC IC700 Is the LVDS Cable connected well Cable inserts well Change the Tuner Check the power L1103 Cable inserts well B NO NO NO NO NO NO NO YES YES YES YES YES YES YES 14 In case PIP doesn t display from ot...

Page 22: ...nusual display from RGB mode main sub Is normal video input of the JK102 Check L126 L127 L128 Check the input source Is normal video input of the JK103 Check L129 L130 L131 Is normal R G B input and H V sync of the JK500 Check R509 R511 R512 R513 R515 Check the input source Check the input source Change IC IC700 Change IC IC700 Change IC IC700 YES NO YES NO YES NO ...

Page 23: ...u Check the Speaker cable Replace IC400 IC401 operate normally Replace IC401 IC402 operate normally Replace IC402 Replace VSC B D Only HDMI is no Sound Download the EDID data Only AV input is no Sound Is the output of IC300 pin52 53 normal Check the signal after IC300 refer to circuit diagram Replace IC300 Only RF is no Sound Check the Tuner In Out YES YES YES YES YES YES YES YES YES NO NO NO NO N...

Page 24: ...r 0x 68 offset 0x 37 4 Check Audio ou t channe l mute reg ister 0x68 offse t 0x32 is appropriately enabled Check HDMI source Change another so urce or cab le Is wave continuous 1 Check H DMI rece iver s status register 0x60 offset 0x06 If the value is 0xf or 0x 8 it is normal 2 Check HDCP reg iste r 0 x60 offset 0x32 Enabl e bit 6 HDCP key loaded Enable bit 5 HDCP decryption active Enable bit 4 HD...

Page 25: ... Change Timeshift Mode from off to On Connect a cable P1300 P1302 Replace the IC1300 IC1302 YE S YE S YE S NO NO NO NO Sympto m L ED is Green Doesn t work time shift m ode Can t enter to recorded list Can t record AV RF Component Ch eck f ollow Is operated IC1500 IC1501 normally Replace the IC1500 IC1501 Change HDD YE S ...

Page 26: ... 26 BLOCK DIAGRAM ...

Page 27: ...MEMO 27 ...

Page 28: ... 28 120 122 120 121 520 510 910 900 500 300 200 802 807 808 809 820 840 830 804 530 600 610 400 800 803 805 806 801 EXPLODED VIEW ...

Page 29: ...ch LCD LGIT LCD Tornado 42inch Power Inverter PSU LG INNOTEK LTD 610 EBU37801501 Main Total Assembly 42LB5RT TB BRAND LP7BA 800 MGJ32902301 Plate PRESS EGI 1 2 FRAME SBHG A 42LY3 METAL BAR TOP FOR LPL MODULE 801 MGJ32902401 Plate PRESS EGI 1 6 FRAME SBHG A 42LY3 METAL BAR BOTTOM FOR LPL MODULE 802 MGJ32902502 Plate PRESS EGI 1 2 FRAME SBHG A 42LC4 METAL BAR RIGHT 803 MGJ32902702 Plate PRESS EGI 1 ...

Page 30: ...S0ANC010 47u C121 0CE106SH6DC Capacitor AL Chip VMV106M025S0ANB010 10u C122 0CE106SH6DC Capacitor AL Chip VMV106M025S0ANB010 10u C1222 0CE106SH6DC Capacitor AL Chip VMV106M025S0ANB010 10u C1226 0CE106SH6DC Capacitor AL Chip VMV106M025S0ANB010 10u C1244 0CE106SH6DC Capacitor AL Chip VMV106M025S0ANB010 10u C1307 0CE107WF6DC Capacitor AL Chip MVK6 3TP16VC100M 100uF C1308 0CE107WF6DC Capacitor AL Chip...

Page 31: ...K500CT 100nF 1 C1025 0CK103BH56A Capacitor Ceramic Chip C1005X7R1E103KT 10nF C1027 0CK103BH56A Capacitor Ceramic Chip C1005X7R1E103KT 10nF C1028 0CK103BH56A Capacitor Ceramic Chip C1005X7R1E103KT 10nF C103 0CC330CK41A Capacitor Ceramic Chip C1608C0G1H330JT 33pF 5 C1030 0CK225DFK4A Capacitor Ceramic Chip C2012Y5V1C225MT 2 2uF C105 0CH5101K416 Capacitor Ceramic Chip C2012C0G1H101JT 100pF C105 0CK104...

Page 32: ...CK56A Capacitor Ceramic Chip 0603B104K500CT 100nF 1 C1327 0CK104CK56A Capacitor Ceramic Chip 0603B104K500CT 100nF 1 C1328 0CK104CK56A Capacitor Ceramic Chip 0603B104K500CT 100nF 1 C1329 0CK104CK56A Capacitor Ceramic Chip 0603B104K500CT 100nF 1 C133 EAE32755801 Capacitor Ceramic Chip CL31A106K5HNNNE 10uF 1 C1330 0CK104CK56A Capacitor Ceramic Chip 0603B104K500CT 100nF 1 C1331 0CK104CK56A Capacitor C...

Page 33: ... 1 C1506 0CK104CK56A Capacitor Ceramic Chip 0603B104K500CT 100nF 1 C1507 0CK104CK56A Capacitor Ceramic Chip 0603B104K500CT 100nF 1 C1508 0CK104CK56A Capacitor Ceramic Chip 0603B104K500CT 100nF 1 C1509 0CK104CK56A Capacitor Ceramic Chip 0603B104K500CT 100nF 1 C1510 0CK104CK56A Capacitor Ceramic Chip 0603B104K500CT 100nF 1 C1511 0CK104CK56A Capacitor Ceramic Chip 0603B104K500CT 100nF 1 C1512 0CK104C...

Page 34: ...70nF C423 0CK474CH94A Capacitor Ceramic Chip 0603F474Z250CT 470nF C424 0CK474CH94A Capacitor Ceramic Chip 0603F474Z250CT 470nF C425 0CK474CH94A Capacitor Ceramic Chip 0603F474Z250CT 470nF C426 0CK474CH94A Capacitor Ceramic Chip 0603F474Z250CT 470nF C427 0CK103BH56A Capacitor Ceramic Chip C1005X7R1E103KT 10nF C428 0CK471CK56A Capacitor Ceramic Chip C1608X7R1H471KT 470pF C429 0CK474CH94A Capacitor C...

Page 35: ...CK104CK56A Capacitor Ceramic Chip 0603B104K500CT 100nF 1 C729 0CK104CK56A Capacitor Ceramic Chip 0603B104K500CT 100nF 1 C730 0CK104CK56A Capacitor Ceramic Chip 0603B104K500CT 100nF 1 C731 0CK104BF56A Capacitor Ceramic Chip C1005X7R104KET 100nF 1 C742 0CK104CK56A Capacitor Ceramic Chip 0603B104K500CT 100nF 1 C743 0CK104CK56A Capacitor Ceramic Chip 0603B104K500CT 100nF 1 C744 0CK104CK56A Capacitor C...

Page 36: ...CK104CK56A Capacitor Ceramic Chip 0603B104K500CT 100nF 1 C940 0CK103CK56A Capacitor Ceramic Chip 0603B103K500CT 10nF 10 C941 0CK104CK56A Capacitor Ceramic Chip 0603B104K500CT 100nF 1 C942 0CK103CK56A Capacitor Ceramic Chip 0603B103K500CT 10nF 10 C943 0CK103CK56A Capacitor Ceramic Chip 0603B103K500CT 10nF 10 C945 0CK104BF56A Capacitor Ceramic Chip C1005X7R104KET 100nF 1 C946 0CK104BF56A Capacitor C...

Page 37: ...32CBNZ 3VTO5 5V IC1300 EAN35947401 IC Video Encode MT8158ADE 300 0MVTO3 6 IC1500 EAN38294101 IC Video Processors LGDT1300 3VTO3 6V 2 3V IC700 0IPRP00692E IC Video Processors FLI30436 LF AC XD30436 IC1305 0IKE702900G IC Voltage Detector KIA7029AF 0 3TO15V 2 IC702 0IKE702900G IC Voltage Detector KIA7029AF 0 3TO15V 2 IC1005 0IPMG78391A IC Voltage Regulator SC2595STR 2 3TO5V 0 0W IC1101 EAN32662801 IC...

Page 38: ...Bead BG2012B102TF 1000ohm 2 L502 EAM30764101 Filter Bead MBW3216 501TF 500ohm 3 L502 EAM30764101 Filter Bead MBW3216 501TF 500ohm 3 L503 EAM30764101 Filter Bead MBW3216 501TF 500ohm 3 L504 EAM30764101 Filter Bead MBW3216 501TF 500ohm 3 L600 6210TCE0013 Filter Bead HB 1M1608 121JT 120OHM L601 6210TCE0013 Filter Bead HB 1M1608 121JT 120OHM L602 6210TCE0013 Filter Bead HB 1M1608 121JT 120OHM L603 621...

Page 39: ...A TR Bipolar 2SC3875S ALY NPN 5V 6 Q410 0TR387500AA TR Bipolar 2SC3875S ALY NPN 5V 6 Q411 0TR387500AA TR Bipolar 2SC3875S ALY NPN 5V 6 Q600 0TR102009AJ TR Bipolar KRC102S NPN 30V 0V 50V Q601 0TR102009AJ TR Bipolar KRC102S NPN 30V 0V 50V Q602 0TR150400BA TR Bipolar 2SA1504S ASY PNP 5V AL1300 0RJ0752C687 Resistor Array RCA86TRJ75R0 75OHM 5 AL1301 0RJ0752C687 Resistor Array RCA86TRJ75R0 75OHM 5 AL130...

Page 40: ...1003 0RJ4701C678 Resistor Chip MCR01MZPJ472 4 7KOHM 5 R1004 0RJ0000C678 Resistor Chip MCR01MZPJ000 0OHM 5 1 R1005 0RJ4701C678 Resistor Chip MCR01MZPJ472 4 7KOHM 5 R1007 0RJ0000C678 Resistor Chip MCR01MZPJ000 0OHM 5 1 R1008 0RJ1000C678 Resistor Chip MCR01MZPJ101 100OHM 5 R1009 0RJ1000C678 Resistor Chip MCR01MZPJ101 100OHM 5 R101 0RH0000D622 Resistor Chip MCR10EZHJ000 0OHM 5 1 R101 0RH2702D622 Resis...

Page 41: ...6 8KOHM 5 R1246 0RJ1000D677 Resistor Chip MCR03EZPJ101 100OHM 5 R1246 0RJ3000D677 Resistor Chip MCR03EZPJ301 300OHM 5 R1247 0RJ1000D677 Resistor Chip MCR03EZPJ101 100OHM 5 R1247 0RJ3000D677 Resistor Chip MCR03EZPJ301 300OHM 5 R1248 0RJ4702D677 Resistor Chip MCR03EZPJ473 47KOHM 5 R1249 0RJ4702D677 Resistor Chip MCR03EZPJ473 47KOHM 5 R1250 0RJ1000D677 Resistor Chip MCR03EZPJ101 100OHM 5 R1250 0RJ300...

Page 42: ...HM 5 1 R1386 0RJ0000C678 Resistor Chip MCR01MZPJ000 0OHM 5 1 R1387 0RJ0000C678 Resistor Chip MCR01MZPJ000 0OHM 5 1 R1388 0RJ3300C678 Resistor Chip MCR01MZPJ331 330OHM 5 R1389 0RJ1002C678 Resistor Chip MCR01MZPJ103 10KOHM 5 R139 0RJ0000D677 Resistor Chip MCR03EZPJ000 0OHM 5 1 R1393 0RJ1002C678 Resistor Chip MCR01MZPJ103 10KOHM 5 R1395 0RJ1002C678 Resistor Chip MCR01MZPJ103 10KOHM 5 R1396 0RJ0752C67...

Page 43: ...J1502D677 Resistor Chip MCR03EZPJ153 15KOHM 5 R2116 0RJ2201D677 Resistor Chip MCR03EZPJ222 2 2KOHM 5 R2117 0RJ2201D677 Resistor Chip MCR03EZPJ222 2 2KOHM 5 R2118 0RJ2201D677 Resistor Chip MCR03EZPJ222 2 2KOHM 5 R2119 0RJ2201D677 Resistor Chip MCR03EZPJ222 2 2KOHM 5 R212 0RJ4701D677 Resistor Chip MCR03EZPJ472 4 7KOHM 5 R2120 0RJ2201D677 Resistor Chip MCR03EZPJ222 2 2KOHM 5 R2121 0RJ2201D677 Resisto...

Page 44: ...J102 1KOHM 5 R327 0RJ1001D677 Resistor Chip MCR03EZPJ102 1KOHM 5 R328 0RJ1000C678 Resistor Chip MCR01MZPJ101 100OHM 5 R329 0RJ1000C678 Resistor Chip MCR01MZPJ101 100OHM 5 R330 0RJ1003C678 Resistor Chip MCR01MZPJ104 100KOHM 5 R331 0RJ1000C678 Resistor Chip MCR01MZPJ101 100OHM 5 R332 0RJ1000C678 Resistor Chip MCR01MZPJ101 100OHM 5 R333 0RJ1000C678 Resistor Chip MCR01MZPJ101 100OHM 5 R334 0RJ1000C678...

Page 45: ...152 1 5KOHM 5 R482 0RJ3301C678 Resistor Chip MCR01MZPJ332 3 3KOHM 5 R483 0RJ1000C678 Resistor Chip MCR01MZPJ101 100OHM 5 R484 0RJ1000C678 Resistor Chip MCR01MZPJ101 100OHM 5 R485 0RJ1000C678 Resistor Chip MCR01MZPJ101 100OHM 5 R486 0RJ0331D677 Resistor Chip MCR03EZPJ3R3 3 3OHM 5 R488 0RJ0000C678 Resistor Chip MCR01MZPJ000 0OHM 5 1 R489 0RJ0561D677 Resistor Chip MCR03EZPJ5R6 5 6OHM 5 R490 0RJ0561D6...

Page 46: ...56OHM 5 R727 0RJ0562D677 Resistor Chip MCR03EZPJ560 56OHM 5 R728 0RJ0562D677 Resistor Chip MCR03EZPJ560 56OHM 5 R729 0RJ0000D677 Resistor Chip MCR03EZPJ000 0OHM 5 1 R730 0RJ0000C678 Resistor Chip MCR01MZPJ000 0OHM 5 1 R731 0RJ0000D677 Resistor Chip MCR03EZPJ000 0OHM 5 1 R732 0RJ0000C678 Resistor Chip MCR01MZPJ000 0OHM 5 1 R733 0RJ0000C678 Resistor Chip MCR01MZPJ000 0OHM 5 1 R736 0RJ1001D677 Resist...

Page 47: ...MZPJ000 0OHM 5 1 R870 0RJ0000C678 Resistor Chip MCR01MZPJ000 0OHM 5 1 R871 0RJ0000C678 Resistor Chip MCR01MZPJ000 0OHM 5 1 R872 0RJ0000C678 Resistor Chip MCR01MZPJ000 0OHM 5 1 R873 0RJ0000C678 Resistor Chip MCR01MZPJ000 0OHM 5 1 R874 0RJ0000C678 Resistor Chip MCR01MZPJ000 0OHM 5 1 R875 0RJ0000C678 Resistor Chip MCR01MZPJ000 0OHM 5 1 R876 0RJ0000C678 Resistor Chip MCR01MZPJ000 0OHM 5 1 R877 0RJ0000...

Page 48: ...onnector DSUB KCN DS 1 0088 D SUB 9P P103 6630SK00604 Connector USB UAR27 4K2300 A 1P 2 50 P1000 6602T25008M Connector Wafer SMW250 13P 13P 2 50MM P101 6602T20009C Connector Wafer SMAW200 04P 4P 2 00MM P101 6602T20009J Connector Wafer SMAW200 10P 10P 2 00MM P102 6602T20008N Connector Wafer SMW200 14P 14P 2 00MM P102 6602T20009C Connector Wafer SMAW200 04P 4P 2 00MM P104 6602T25008B Connector Wafer...

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Page 53: ...May 2007 Printed in Korea P NO MFL39265908 ...

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