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LG 47LC7DF-UB Service Manual
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LG 47LC7DF-UB Service Manual

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LCD TV
SERVICE MANUAL
CHASSIS : LA73A
MODEL : 47LC7DF
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
47LC7DF-UB

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Summary of Contents for LG 47LC7DF-UB

  • Page 1 LCD TV SERVICE MANUAL CHASSIS : LA73A MODEL : 47LC7DF 47LC7DF-UB CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    CONTENTS CONTENTS ....................2 PRODUCT SAFETY ..................3 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION ...............12 TROUBLE SHOOTING & BLOCK DIAGRAM ........17 EXPLODED VIEW .................. 43 REPLACEMENT PARTS LIST ............... 45 SVC. SHEET ....................- 2 -...

  • Page 3: Product Safety

    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 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. 3. Test method This spec sheet is applied to the 47" LCD TV used LA73A chassis. 3.1 Performance : LGE TV test method followed. 3.2 Demanded other specification 2.
  • Page 7 5. Chrominance & Luminance Specification Item Unit Remark White peak brightness cd/m Contrast ratio cd/m Brightness uniformity Full white Color coordinate 0.638 +/- 0.03 0.340 +/- 0.03 GREEN 0.279 +/- 0.03 0.611 +/- 0.03 BLUE 0.146 +/- 0.03 0.062 +/- 0.03 WHITE 0.272 +/- 0.03...
  • Page 8 Peak & average Brightness & Contrast measure standard specification - White Peak brightness measure specification 1) In non-impressed condition, measure peak brightness displayable as much as possible LCD module. 2) Measuring instrument: CA-110 or a sort of Color Analyzer. 3) Pattern Generator : VG-828 or a sort of digital pattern generator (displayable Full White & 1/25 White Window pattern) 4) Measure condition - Test pattern: in center, 1/5(H)x1/5(V) of Window Pattern (white pattern in non-impressed condition) - SET condition : Contrast &...
  • Page 9 7. Component Video Input (Y, P Specification Remark Resolution H-freq(kHz) V-freq(Hz) 720*480 15.73 SDTV ,DVD 480I 720*480 15.73 59.94 SDTV ,DVD 480I 720*480 31.47 SDTV 480P 720*480 31.47 59.94 SDTV 480P 1280*720 45.00 60.00 HDTV 720P 1280*720 44.96 59.94 HDTV 720P 1920*1080 33.75 60.00...
  • Page 10 9. HDMI Input (PC/DTV) Resolution H-freq(kHz) V-freq(Hz) Pixel clock(MHz) Remark 640*350 31.468 70.09 25.17 720*400 31.469 70.08 28.32 640*480 31.469 59.94 25.17 VESA(VGA) 640*480 37.861 72.80 31.50 VESA(VGA) 640*480 37.500 75.00 31.50 VESA(VGA) 800*600 35.156 56.25 36.00 VESA(SVGA) 800*600 37.879 60.31 40.00 VESA(SVGA)
  • Page 11 9. Customer Menu Setup (Shipment Condition) Item Condition Remark Input Mode TV02CH Volume Level Mute Aspect Ratio 16:9 Video EZ Picture Daylight Contrast Brightness Color Sharpness Tint Color-temperature Cool Auto(On) Advanced Cinema3:2 Mode(Off) Black Level(RF,HDMI=>Low),(AV=>High)( RGB-PC,Component=>Disable) Audio Audio Language EZ Sound Normal Balance Bass...

  • Page 12: Adjustment Instruction

    ADJUSTMENT INSTRUCTION 1. Scope 4. Adjustment method using RS-232C These instructions are applied to all of the LCD TV, LA73A Adjust the 3 board adjustment items of 3 using the RS-232C Chassis. according to the "4.1.2 Adjustment order". 4-1. Necessary details before adjustment 2.
  • Page 13 Rev button O Check RS-232C operation In this case, first press the of Video Signal Press the Instart of adjustment R/C to enter the 7.Baud Rate Generator (Master), to generate the white pattern to be displayed menu and set the Baud Rate to 115200 to check the 232-C from the left.
  • Page 14 5.3 480i Comp1, 1080p Comp1/RGB adjustment 6. EDID(The Extended Display method Identification Data)/DDC (Display Data Channel) Download A. ADC 480i component1 adjustment - Check Component1 connected condition from the using device. 6.1 Introduction - (MSPG-925FA : (model :209 , pattern :65 ) This has been established by VESA and is the function B.
  • Page 15 6.3 EDID Data for LA73A - 15 -...
  • Page 16 7. White Balance adjustment A. Connect the set according to the internal pattern or HDMI input in accordance with 4.3.2 measuring device connection diagram. B. Set the Baud Rate of RS-232C to 115200. It is set to 115200 7-1. Using device as default.

  • Page 17: Troubleshooting & Block Diagram

    TROUBLESHOOTING & BLOCK DIAGRAM - 17 -...
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  • Page 43: Exploded View

    EXPLODED VIEW - 43 -...
  • Page 44 Speaker,Tweeter, EN10D-6714 ND 10W 8OHM 82DB 0HZ 68 X 23 X 22.7 LUG KOREA TOPTONE EAJ35565901 LCD,Module-TFT, LC470WU1-SLB2 FULLHD 47INCH 1920X1080 550CD COLOR 72% 16/9 800:1(basic) DCR(1600:1) A-TW Pol. 12000K P7 LG PHILIPS LCD ABJ32682606 Cabinet Assembly, 47LB7DF-UB LA73A 47" FOR CANADA SKD AT LGEMX ACQ32083406 Cover Assembly, 47LB5 LA73A 47"...

  • Page 45: Replacement Parts List

    REPLACEMENT PARTS LIST DATE: 2007. 04. 04. LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION ACCESSORY C453 0CE106WFKDC "Capacitor,AL,Chip" MVK4.0TP16VC10M 10uF 20 C466 0CE476WF6DC "Capacitor,AL,Chip" MVK6.3TP16VC47M 47uF 20 MFL35930208 "Manual,Owners" PRINTING USER LA73A BRA C487 0CE106WFKDC "Capacitor,AL,Chip"...
  • Page 46 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C700 0CE105WK6DC "Capacitor,AL,Chip" MVK4.0TP50VC1M 1uF 20% C214 EAE33970001 "Capacitor,Ceramic,Chip" CS1005X5R105K6R3NR 1uF C701 EAE30840301 "Capacitor,AL,Chip" 10SVPC68M 68uF 20% 10V C2140 0CK104BF56A "Capacitor,Ceramic,Chip" C1005X7R104KET 100nF 10 C7014 0CE107WF6DC "Capacitor,AL,Chip"...
  • Page 47 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C2197 0CK104BF56A "Capacitor,Ceramic,Chip" C1005X7R104KET 100nF 10 C232 0CK104BF56A "Capacitor,Ceramic,Chip" C1005X7R104KET 100nF 10 C2198 0CK104BF56A "Capacitor,Ceramic,Chip" C1005X7R104KET 100nF 10 C233 0CK104BF56A "Capacitor,Ceramic,Chip" C1005X7R104KET 100nF 10 C2199 0CK105CD56A "Capacitor,Ceramic,Chip"...
  • Page 48 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C350 0CC221BKFAA "Capacitor,Ceramic,Chip" C1005C0G1H221JT 220pF 5 C428 0CK104BF56A "Capacitor,Ceramic,Chip" C1005X7R104KET 100nF 10 C351 0CH5470K618 "Capacitor,Ceramic,Chip" 0402N470M500LT 47pF 5% C429 0CK104BF56A "Capacitor,Ceramic,Chip" C1005X7R104KET 100nF 10 C352 0CH5470K618 "Capacitor,Ceramic,Chip"...
  • Page 49 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C5028 0CK474CH94A "Capacitor,Ceramic,Chip" 0603F474Z250CT 470nF -2 C575 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 10 C5029 0CK222CK56A "Capacitor,Ceramic,Chip" 0603B222K500CT 2.2nF 10 C575 0CK474CH94A "Capacitor,Ceramic,Chip" 0603F474Z250CT 470nF -2 C5030 0CK104CK56A "Capacitor,Ceramic,Chip"...
  • Page 50 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C630 0CK102BK56A "Capacitor,Ceramic,Chip" 0402B102K500CT 1nF 10% C733 0CK471BK56A "Capacitor,Ceramic,Chip" C1005X7R1H471KT 470pF 1 C632 0CK104BF56A "Capacitor,Ceramic,Chip" C1005X7R104KET 100nF 10 C735 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 10 C634 0CK104BF56A "Capacitor,Ceramic,Chip"...
  • Page 51 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION L201 EAM32500503 "Filter,Bead" BLM18AG221SN1D 220ohm 2 L202 EAM32500503 "Filter,Bead" BLM18AG221SN1D 220ohm 2 IC402 0IPRP00696C "IC,A/D Converter" MST3361M-LF-170 3.3V_2. L203 EAM32500503 "Filter,Bead" BLM18AG221SN1D 220ohm 2 IC403 EAN32724701 "IC,Analog Switch"...
  • Page 52 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION L720 6200J00005N "Filter,Bead" HH-1M2012-121JT(H:1mm) L511 EAP32842805 "Inductor,Wire Wound,Chip" NR8040T150M 15UH 20% L723 6210TCE001X "Filter,Bead" HU-1H4532-121JT 120OHM L512 EAP32842805 "Inductor,Wire Wound,Chip" NR8040T150M 15UH 20% L724 6210TCE001X "Filter,Bead" HU-1H4532-121JT 120OHM L513 EAP32842805 "Inductor,Wire Wound,Chip"...
  • Page 53 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION AR201 EBC33751901 "Resistor,Array" MNR14M0ABJ180 18OHM 5% R105 0RH2702D622 "Resistor,Chip" MCR10EZHJ273 27KOHM 5% AR202 EBC33751901 "Resistor,Array" MNR14M0ABJ180 18OHM 5% R106 0RH8201D622 "Resistor,Chip" MCR10EZHJ822 8.2KOHM 5% AR203 EBC33751901 "Resistor,Array"...
  • Page 54 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R170 0RJ0000C678 "Resistor,Chip" MCR01MZPJ000 0OHM 5% 1/ R3003 0RJ0000C678 "Resistor,Chip" MCR01MZPJ000 0OHM 5% 1/ R170 0RJ0222C678 "Resistor,Chip" MCR01MZPJ220 22OHM 5% 1 R301 0RJ1502C478 "Resistor,Chip" MCR01MZPF153 15KOHM 1% R171 0RJ0000C678 "Resistor,Chip"...
  • Page 55 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R346 0RJ2200C678 "Resistor,Chip" MCR01MZPJ221 220OHM 5% R4019 0RJ4701C678 "Resistor,Chip" MCR01MZPJ472 4.7KOHM 5% R347 0RJ4701C678 "Resistor,Chip" MCR01MZPJ472 4.7KOHM 5% R402 0RJ0332C678 "Resistor,Chip" MCR01MZPJ330 33OHM 5% 1 R350 0RJ2000C678 "Resistor,Chip"...
  • Page 56 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R4086 0RJ0000C678 "Resistor,Chip" MCR01MZPJ000 0OHM 5% 1/ R416 0RJ0332C678 "Resistor,Chip" MCR01MZPJ330 33OHM 5% 1 R4087 0RJ0000C678 "Resistor,Chip" MCR01MZPJ000 0OHM 5% 1/ R418 0RJ0682C678 "Resistor,Chip" MCR01MZPJ680 68OHM 5% 1 R4088 0RJ0000C678 "Resistor,Chip"...
  • Page 57 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R5004 0RJ2001C678 "Resistor,Chip" MCR01MZPJ202 2KOHM 5% 1 R5077 0RJ2001D677 "Resistor,Chip" MCR03EZPJ202 2KOHM 5% 1 R5005 0RJ2001C678 "Resistor,Chip" MCR01MZPJ202 2KOHM 5% 1 R5078 0RJ2001D677 "Resistor,Chip" MCR03EZPJ202 2KOHM 5% 1 R5008 0RJ0000C678 "Resistor,Chip"...
  • Page 58 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R6044 0RJ6802C678 "Resistor,Chip" MCR01MZPJ683 68KOHM 5% R702 0RJ1001C678 "Resistor,Chip" MCR01MZPJ102 1KOHM 5% 1 R6045 0RJ6802C678 "Resistor,Chip" MCR01MZPJ683 68KOHM 5% R7034 0RJ0000C678 "Resistor,Chip" MCR01MZPJ000 0OHM 5% 1/ R6048 0RJ0000C678 "Resistor,Chip"...
  • Page 59 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R775 0RJ0000C678 "Resistor,Chip" MCR01MZPJ000 0OHM 5% 1/ VR411 6102W5V016A Varistor AVRL161A1R1NT 10V 30% 1 R777 0RJ2002D677 "Resistor,Chip" MCR03EZPJ203. 20KOHM 5% CONNECTOR R778 0RJ1001C678 "Resistor,Chip" MCR01MZPJ102 1KOHM 5% 1 R779 0RJ1001C678 "Resistor,Chip"...
  • Page 62 Apr., 2007 P/NO : MFL35929306 Printed in Korea...

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