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LG 32LB9D-DD Service Manual
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LG 32LB9D-DD Service Manual

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LCD TV
SERVICE MANUAL
CHASSIS : LT73A
MODEL : 32LB9D
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
North/Latin America
Europe/Africa
Asia/Oceania
32LB9D-DD
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com

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Summary of Contents for LG 32LB9D-DD

  • Page 1 Internal Use Only North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com LCD TV SERVICE MANUAL CHASSIS : LT73A MODEL : 32LB9D 32LB9D-DD 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 ................16 BLOCK DIAGRAM...................24 EXPLODED VIEW .................. 28 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. 2. After removing an electrical assembly equipped with ES manual and its supplements and addenda, read and follow the 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. General Specification(TV) Item Specification Remark Receiving System Analog : NTSC-M, DTV : DVB-T Available Channel 1) VHF : 2~13 2) UHF : 14~69 3) CATV : 1 ~ 125 4) DTV : 14~69 Tuner IF 1) NTSC-M : 42.75MHz(Picture),...
  • Page 7 3. Optical Feature(37" LCD Module) Item Specification Min. Typ. Max. Remark Viewing Angle<CR>10> R/L, U/D 178, 178 Luminance Luminance (cd/m2) 37" Variation MAX / MIN Contrast Ratio CR(37") All white/All black CRD (With AI)(37") 1200 1600 All white/All black CIE Color Coordinates White 0.279 LPL(37")
  • Page 8 5. Component Video Input (Y, P Specification Remark Resolution H-freq(kHz) V-freq(Hz) 720*480 15.73 60.00 SDTV, DVD 480i 720*480 15.63 59.94 SDTV, DVD 480i 720*480 31.47 59.94 480p 1280*720 44.96 59.94 HDTV 720p 1920*1080 33.75 60.00 HDTV 1080i 1920*1080 33.72 59.94 HDTV 1080i 6.
  • Page 9 7. HDMI DTV - HDMI DTV Table Resolution H-freq(kHz) V-freq(Hz) Pixel clock(MHz) Remark 640 x 480 31.50 59.94 25.175 SDTV 480p 60Hz 640 x 480 31.50 25.20 SDTV 480p 60Hz 720 x 480 31.47 59.94 27.00 SDTV 480p 60Hz 720 x 480 31.47 27.027 SDTV 480p 60Hz...
  • Page 10 - HDMI EDID DATA 1) HDMI 1 0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F 0x00 Product ID Serial No 0x01 Month/Year 0x02 0x03 0x04 0x05 0x06 0x07 0x00 0x01 0x02 0x03 0x04 0x05 0x06...
  • Page 11 8. Mechanical specification 1) 37LC7D Item Content Unit Remark Product Widt(W) Length(D) Height(H) Dimension Before Packing 280.5 692.8 With Stant After Packing 1021 Product Only SET 21.5 With BOX 2) 42LC7D Item Content Unit Remark Product Widt(W) Length(D) Height(H) Dimension Before Packing 1033.1 287.6...

  • Page 12: Adjustment Instruction

    ADJUSTMENT INSTRUCTION 1. Application Object Before AV ADC Calibration, should be select the "Tool Option " These instructions are applied to all of the LCD TV, LT73A. 4. Select LCD module size and tool. 2. Specification 4.1 Press ADJ Key in the Adjust remocon. 2.1 Because this is not a hot chassis, it is not necessary to D/E (CH+/-) key, and use an isolation transformer.
  • Page 13 5. ADC Calibration 5.2.1 Method of Auto Component Color Balance 1) Input the Component 720p/60Hz 7 Color Bar (MSPG- 925FS model:216, pattern:65) signal into Component. 5.1 Adjustment of RF / AV / S-VIDEO 2) Set the PSM to Dynamic mode in the Picture menu. * Required Equipments 8 Remote controller for adjustment.
  • Page 14 Before adjusting White-balance , the AV ADC * Auto adjustment Map(RS-232C) should be done Communication Type LT73A Protocol Baud Rate Data bit Stop bit Parity 115200 None 7. White Balance Protocol Index Cmd 1 Cmd 2 Data Min Value Max Value *Test Equipment 8 Color Analyzer (CA-210/CH.9) Setting...
  • Page 15 8. Manual white Balance One of R Gain / G Gain / B Gain should be kept on 80, and others are controlled lowering from 80 1) Press 'power on' of the control R/C, set heat run to white by pressing G, and heat run over 15 minutes (Set: RS-233 Host: PC, Baud Rate: 115200bps, Download: Cortez).

  • Page 16: Troubleshooting

    TROUBLESHOOTING - 16 -...
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  • Page 24: Block Diagram

    BLOCK DIAGRAM LCD PANLE PDP PANLE STA335BW COMP1 YPbPr SDRAM COMP2 YPbPr 256Mbit MSP4450K RGBHV PC SOUND SDRAM 256Mbit Flash memory 32Mbit S-VIDEO AV1 CVBS AV1 LR TUNER CVBS TDFB-T102P ‘TAUV-H301P - 24 -...
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  • Page 28: Exploded View

    EXPLODED VIEW 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 EXPLODED VIEW. 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.
  • Page 29 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 30 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 31 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 32 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 33 Jul., 2007 P/NO : MFL37492405 Printed in Korea...

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