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LG 42LB5RT Service Manual
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LG 42LB5RT Service Manual

Lg 42lb5rt lcd tv service manual
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See also: Owner's Manual
LCD TV

SERVICE MANUAL

CHASSIS : LP7BA
MODEL : 42LB5RT
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
website:http://biz.LGservice.com
42LB5RT-TB

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Summary of Contents for LG 42LB5RT

  • Page 1: Service Manual

    LCD TV SERVICE MANUAL CHASSIS : LP7BA MODEL : 42LB5RT 42LB5RT-TB CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    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 ....................- 2 -...

  • Page 3: Safety Precautions

    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 Shock, Fire, or other Hazards.

  • Page 4: Servicing Precautions

    SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this service unit under test. manual and its supplements and addenda, read and follow the 2. After removing an electrical assembly equipped with ES SAFETY PRECAUTIONS on page 3 of this publication. devices, place the assembly on a conductive surface such as NOTE: If unforeseen circumstances create conflict between the aluminum foil, to prevent electrostatic charge buildup or...
  • Page 5 IC Remove/Replacement Some chassis circuit boards have slotted holes (oblong) through Circuit Board Foil Repair which the IC leads are inserted and then bent flat against the Excessive heat applied to the copper foil of any printed circuit circuit foil. When holes are the slotted type, the following technique board will weaken the adhesive that bonds the foil to the circuit should be used to remove and replace the IC.

  • Page 6: Specification

    SPECIFICATION NOTE : Specifications and others are subject to change without notice for improvement. 1. Application range (4) Specification and performance of each parts are followed each drawing and specification by part number in This spec sheet is applied to the 42"/37" LCD TV used LP7BA accordance with BOM.
  • Page 7 5. General Specification Item Specification Remark Panel 42" TFT WXGA LCD 37" TFT WXGA LCD Frequency range H : 31 ~ 61Khz PC Input V : 56 ~ 75Hz Control Function 1) Contrast/Brightness 2) H-Position / V-Position 3) Tracking : Clock / Phase 4) Auto Configure 5) Reset Component Jack(480i/576i/480p/576p/720p/1080i) Y/Pb/Pr : 2EA...
  • Page 8 7. Component Video Input (Y, PB, PR) Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Remarks 720*480 15.73 59.94 13.500 SDTV, DVD 480I(525I) 720*480 15.75 60.00 13.514 SDTV, DVD 480I(525I) 720*576 15.625 50.00 13.500 SDTV, DVD 576I(625I) 720*480 31.47 59.94 27.000 SDTV 480P 720*480 31.50 60.00...
  • Page 9 28.125 50.00 74.250 HDTV 1080I 50Hz 1920*1080 67.5 60.00 148.5 HDTV 1080P 1920*1080 56.25 148.5 HDTV 1080P 50Hz 11. Mechanical Spec - 42LB5RT Item Content Remark Product Dimension Width Length Height Unit Before Packing 1033 SET(With Stand) After Packing 1119...

  • Page 10: Adjustment Instruction

    ADJUSTMENT INSTRUCTION 1. Application Range 5. HDD Assembly Adjustment method This spec. sheet is applied to all of the LP7BA chassis(Saturn Analog DVR) manufactured at LG TV Plant 5.1. HDD FORMAT all over the world. 1) Assemble MAIN , DVR Board.
  • Page 11 6. EDID 7. ADC Calibration Caution RF/AV/S-VIDEO Component * Use the proper signal cable for EDID Download MSPG925FA NTSC Model:217 720P Model: 60 - Analog EDID : Pin3 exists - Digital EDID : Pin3 exists INPUT AV3-ZF VIDEO1 -MA Pattern:65 1024*768 60Hz SELECT AV1-TB * 100% Color Bar...
  • Page 12 7.2 Adjustment of Component. 7.3 Adjustment of RGB * Required Equipments * Required Equipments - Remote controller for adjustment - Remote controller for adjustment - 802F Pattern Generator, Master (MSPG-925FA), etc - 802F Pattern Generator, Master (MSPG-925FA), etc - MSPG-925FA Pattern Generator - MSPG-925FA Pattern Generator (Which has 720p@60Hz YPbPr signal : 100% Color (Which has XGA [1024*768] 60Hz PC Format output...

  • Page 13: White Balance

    8. White Balance * Caution : Before White-balance, the AV ADC should be done. => Notice - Do the white balance adjustment under the 10LUX - Before white balance, press the In-start key 2times and do the reset like Fig.5 - Use the Torino inner pattern(216 gray pattern) - To enter White-balance mode,press the IN-START key 2times.

  • Page 14: Trouble Shooting

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  • Page 26: Block Diagram

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  • Page 27 MEMO - 27 -...

  • Page 28: Exploded View

    EXPLODED VIEW - 28 -...

  • Page 29: Exploded View Parts List

    Speaker,Tweeter, EN10D-6714 ND 10W 8OHM 82DB 0HZ 68 X 23 X 22.7 LUG KOREA TOPTONE EAJ36547901 LCD,Module-TFT, LC420WX6-SLA2 WXGA 42INCH 1366X768 500CD COLOR 72% 16/9 1000:1(DCR 5000:1) 5ms(GTG),Zero RT Pol. 10000K LG PHILIPS LCD ABJ32247711 Cabinet Assembly, 42LB5RT-TB LP7BA 42" Time Machine Model_NONE CI SLOT ACQ32247921 Cover Assembly, 42LB5RF-ZF LP79A 42"...

  • Page 30: Replacement Parts List

    PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION ACCESSORY C1201 0CE476SF6DC "Capacitor,AL,Chip" VMV476M016S0ANC010 47u MFL38159201 "Manual,Owners" PRINTING USER LP79A LG C1207 0CE476SF6DC "Capacitor,AL,Chip" VMV476M016S0ANC010 47u MKJ39170801 Remote Controller COMPLEX PP79A 32/37/42 C121 0CE106SH6DC "Capacitor,AL,Chip" VMV106M025S0ANB010 10u 3550V00590A...
  • Page 31 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C455 0CE335WK6D8 "Capacitor,AL,Chip" MVK4.0TP50VC3.3M 3.3uF C1023 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 1 C458 0CE226WF6DC "Capacitor,AL,Chip" MVK5.0TP16VC22M 22uF 2 C1025 0CK103BH56A "Capacitor,Ceramic,Chip" C1005X7R1E103KT- 10nF C470 0CE335WK6D8 "Capacitor,AL,Chip" MVK4.0TP50VC3.3M 3.3uF C1027 0CK103BH56A "Capacitor,Ceramic,Chip"...
  • Page 32 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C1214 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 1 C1327 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 1 C1215 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 1 C1328 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 1 C1216 0CK102CK56A "Capacitor,Ceramic,Chip"...
  • Page 33 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C138 EAE32755801 "Capacitor,Ceramic,Chip" CL31A106K5HNNNE 10uF 1 C1507 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 1 C1380 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 1 C1508 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 1 C1381 0CK104CK56A "Capacitor,Ceramic,Chip"...
  • Page 34 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C2307 0CK104BF56A "Capacitor,Ceramic,Chip" C1005X7R104KET 100nF 1 C424 0CK474CH94A "Capacitor,Ceramic,Chip" 0603F474Z250CT 470nF - C2308 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 1 C425 0CK474CH94A "Capacitor,Ceramic,Chip" 0603F474Z250CT 470nF - C231 0CK103BH56A "Capacitor,Ceramic,Chip"...
  • Page 35 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C499 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 1 C729 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 1 C507 0CC120CK41A "Capacitor,Ceramic,Chip" C1608C0G1H120JT 12pF 5 C730 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 1 C509 0CK103BH56A "Capacitor,Ceramic,Chip"...
  • Page 36 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C798 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 1 C945 0CK104BF56A "Capacitor,Ceramic,Chip" C1005X7R104KET 100nF 1 C799 0CK103CK56A "Capacitor,Ceramic,Chip" 0603B103K500CT 10nF 10 C946 0CK104BF56A "Capacitor,Ceramic,Chip" C1005X7R104KET 100nF 1 C800 0CK104CK56A "Capacitor,Ceramic,Chip"...
  • Page 37 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION ZD113 EAH33946001 "Diode,TVS" CDS3C05GTA 5.6V 6.4V 1 IC700 0IPRP00692E "IC,Video Processors" FLI30436-LF-AC(XD30436 ZD114 EAH33945901 "Diode,TVS" CDS3C30GTH 30V 50V 120 IC1305 0IKE702900G "IC,Voltage Detector" KIA7029AF -0.3TO15V 2. ZD115 EAH33945901 "Diode,TVS"...
  • Page 38 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION L1119 6200J00005N "Filter,Bead" HH-1M2012-121JT(H:1mm) L503 EAM30764101 "Filter,Bead" MBW3216-501TF 500ohm 3 L1120 6200J00005N "Filter,Bead" HH-1M2012-121JT(H:1mm) L504 EAM30764101 "Filter,Bead" MBW3216-501TF 500ohm 3 L1121 6200J00005N "Filter,Bead" HH-1M2012-121JT(H:1mm) L600 6210TCE0013 "Filter,Bead"...
  • Page 39 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION Q1001 0TR387500AA "TR,Bipolar" 2SC3875S(ALY) NPN 5V 6 Q409 0TR387500AA "TR,Bipolar" 2SC3875S(ALY) NPN 5V 6 Q1002 0TR387500AA "TR,Bipolar" 2SC3875S(ALY) NPN 5V 6 Q410 0TR387500AA "TR,Bipolar" 2SC3875S(ALY) NPN 5V 6 Q1003 0TR387500AA "TR,Bipolar"...
  • Page 40 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION AL909 EBC32260405 "Resistor,Array" MNR04M0APJ680 68OHM 5% R1005 0RJ4701C678 "Resistor,Chip" MCR01MZPJ472 4.7KOHM 5 AL910 EBC32260405 "Resistor,Array" MNR04M0APJ680 68OHM 5% R1007 0RJ0000C678 "Resistor,Chip" MCR01MZPJ000 0OHM 5% 1 AR1300 0RJ0752C687 "Resistor,Array"...
  • Page 41 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1113 0RJ1002D677 "Resistor,Chip" MCR03EZPJ103 10KOHM 5% R1246 0RJ3000D677 "Resistor,Chip" MCR03EZPJ301 300OHM 5% R1114 0RJ2002D677 "Resistor,Chip" MCR03EZPJ203. 20KOHM 5 R1247 0RJ1000D677 "Resistor,Chip" MCR03EZPJ101 100OHM 5% R1115 0RJ6802D677 "Resistor,Chip"...
  • Page 42 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1324 0RJ1002D677 "Resistor,Chip" MCR03EZPJ103 10KOHM 5% R1387 0RJ0000C678 "Resistor,Chip" MCR01MZPJ000 0OHM 5% 1 R1325 0RJ1002D677 "Resistor,Chip" MCR03EZPJ103 10KOHM 5% R1388 0RJ3300C678 "Resistor,Chip" MCR01MZPJ331 330OHM 5% R1326 0RJ5601D677 "Resistor,Chip"...
  • Page 43 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1552 0RJ1004D677 "Resistor,Chip" MCR03EZPJ105 1MOHM 5% R2116 0RJ2201D677 "Resistor,Chip" MCR03EZPJ222 2.2KOHM 5 R1555 0RJ4701D677 "Resistor,Chip" MCR03EZPJ472 4.7KOHM 5 R2117 0RJ2201D677 "Resistor,Chip" MCR03EZPJ222 2.2KOHM 5 R1556 0RJ4701D677 "Resistor,Chip"...
  • Page 44 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R2324 0RJ0000C678 "Resistor,Chip" MCR01MZPJ000 0OHM 5% 1 R328 0RJ1000C678 "Resistor,Chip" MCR01MZPJ101 100OHM 5% R2326 0RJ1600D677 "Resistor,Chip" MCR03EZPJ161 160OHM 5% R329 0RJ1000C678 "Resistor,Chip" MCR01MZPJ101 100OHM 5% R2327 0RJ0000C678 "Resistor,Chip"...
  • Page 45 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R421 0RJ0000C678 "Resistor,Chip" MCR01MZPJ000 0OHM 5% 1 R483 0RJ1000C678 "Resistor,Chip" MCR01MZPJ101 100OHM 5% R422 0RJ0000C678 "Resistor,Chip" MCR01MZPJ000 0OHM 5% 1 R484 0RJ1000C678 "Resistor,Chip" MCR01MZPJ101 100OHM 5% R423 0RJ0000D677 "Resistor,Chip"...
  • Page 46 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R554 0RJ0222C678 "Resistor,Chip" MCR01MZPJ220 22OHM 5% R728 0RJ0562D677 "Resistor,Chip" MCR03EZPJ560 56OHM 5% R555 0RJ1000D677 "Resistor,Chip" MCR03EZPJ101 100OHM 5% R729 0RJ0000D677 "Resistor,Chip" MCR03EZPJ000 0OHM 5% 1 R556 0RJ1000D677 "Resistor,Chip"...
  • Page 47 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R814 0RJ0222D677 "Resistor,Chip" MCR03EZPJ220 22OHM 5% R872 0RJ0000C678 "Resistor,Chip" MCR01MZPJ000 0OHM 5% 1 R815 0RJ0222D677 "Resistor,Chip" MCR03EZPJ220 22OHM 5% R873 0RJ0000C678 "Resistor,Chip" MCR01MZPJ000 0OHM 5% 1 R816 0RJ0222C678 "Resistor,Chip"...
  • Page 48 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION X500 6212AC2002B Crystal 9H03200164 32.768KHZ 2 P400 6602T25008B "Connector,Wafer" SMW250-03P 3P 2.50MM 1 X700 6212AB2015J Crystal HC-49SM 19.66080HZ 19. P401 6602T25008C "Connector,Wafer" SMW250-04P 4P 2.50MM 1 M503 4930BM9009A Holder MOLD LUPOY MAGELLAN P...
  • Page 53 May., 2007 P/NO : MFL39265908 Printed in Korea...

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