LG 32LB7D Service Manual
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LG 32LB7D Service Manual

LG 32LB7D Service Manual

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LCD TV
SERVICE MANUAL
CHASSIS : LT73B
MODEL : 32LB7D
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
32LB7D-TB
R
Internal Use Only
website:http://biz.LGservice.com

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  • Page 1 Internal Use Only website:http://biz.LGservice.com LCD TV SERVICE MANUAL CHASSIS : LT73B MODEL : 32LB7D 32LB7D-TB CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    TROUBLE SHOOTING ................12 BLOCK DIAGRAM...................19 EXPLODED VIEW .................. 24 EXPLODED VIEW PARTS LIST ..............25 REPLACEMENT PARTS LIST ............... 26 SVC. SHEET ....................Copyright©2007 LG Electronics. Inc. All right reserved. - 2 - LGE Internal Use Only Only for training and service purposes...

  • Page 3: Safety Precautions

    An other abnormality exists that must be corrected before the receiver is returned to the customer. - 3 - Copyright©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 4 Alternatively, 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 Copyright©2007 LG Electronics. Inc. All right reserved. - 4 - LGE Internal Use Only...
  • Page 5 CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures. Copyright©2007 LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...

  • Page 6: Specification

    1920 x 1080 31.25 50.00 HDTV 1080i HDTV 1080i 1920 x 1080 33.75 60.00 1920 x 1080 33.72 59.94 HDTV 1080i - 6 - Copyright©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 6. RGB Input (Analog PC) Resolution H-freq(kHz) V-freq(kHz) Pixel clock(MHz) Proposed 720 x 400 31.468 70.08 28.32 640 x 480 31.469 59.94 25.17 VESA 37.684 75.00 31.50 800 x 600 37.879 60.31 40.00 VESA 46.875 75.00 49.50 832 x 624 49.725 74.55 57.283...

  • Page 8: Adjustment Instruction

    4. ADC Calibration This spec sheet is applied all of the LD73A chassis * Caution: Using ‘power on’ button of the control manufactured at LG TV Plant all over the world. R/C , power on TV. 2. Specification -.Baud rate :115200 bps 1) Because this is not a hot chassis, it is not necessary to use -.RS232 Host : PC...
  • Page 9 4. After Turn on the SET. You can confirm The Channel map on Programme Edit OSD. Warning … If you press IN-STOP key, The channel map will disappear. Copyright©2007 LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
  • Page 10 CA-210(CH 9) 0x06 40 ± 0.313 0.313 0.002 0x07 30 00 C/A ± 0.329 0.329 0.002 Δ uv 0.003 0.003 - 10 - Copyright©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 11 4) Set test-pattern on and display inside pattern. Control is carried out on three color temperature, COOL, MEDIUM, WARM. (Control is carried out three times,) Copyright©2007 LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...

  • Page 12: Troubleshooting

    (except the SC100 connection cable), authorizes the AC voltage marking on manual. When ST-BY 5V does not operate, replace Power Board. Copyright©2007 LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...
  • Page 13 After remove P900, P901 normal Is normal the VSC remove P900, P901 of VSC Board? operation: Replace VSC Board Board? Copyright©2007 LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...
  • Page 14 Reconnect the LVDS cable in Is the LVDS cable P800 normal? Is the IC700 Replace the VSC. (FLI8548) Output normal? Copyright©2007 LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...
  • Page 15 Replace VSC B/D IC(IC700)? the VSC Board? Replace FIL8548 IC(IC700) Is normal the Ctrl Replace Ctrl B/D. Board of Module? Copyright©2007 LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...
  • Page 16 HV sync? Block A Is normal the Input voltage, IIC Is normal the Replace IC Communication and HV sync? FIL8548? Copyright©2007 LG Electronics. Inc. All right reserved. - 16 - LGE Internal Use Only Only for training and service purposes...
  • Page 17 Is normal the Is normal the Input voltage, IIC Replace IC HDMI002 (IC1004)? Communication and HV sync? Same as Block A Copyright©2007 LG Electronics. Inc. All right reserved. - 17 - LGE Internal Use Only Only for training and service purposes...
  • Page 18 IN1301 operating CXA2069 refer to circuit (except HDMI, DTV, (STA335BW) normal? diagram RF) is no sound? Replace the VSC BD Copyright©2007 LG Electronics. Inc. All right reserved. - 18 - LGE Internal Use Only Only for training and service purposes...

  • Page 19: Block Diagram

    DTV I2S / SPDIF SDRAM 256Mbit Flash memory 32Mbit S-VIDEO AV1 CVB S AV1 LR TUNER CVBS RF-SWITCH TDFC-G 116P Copyright©2007 LG Electronics. Inc. All right reserved. - 19 - LGE Internal Use Only Only for training and service purposes...
  • Page 20 DTV I2S / SPDIF SDRAM 256Mbit Flash memory 32Mbit S-VIDEO AV1 CVB S AV1 LR TUNER CVBS RF-SWITCH TDFC-G 116P Copyright©2007 LG Electronics. Inc. All right reserved. - 20 - LGE Internal Use Only Only for training and service purposes...
  • Page 21 DTV I2S / SPDIF SDRAM 256Mbit Flash memory 32Mbit TDFC-G 116P S-VIDEO AV1 CVB S AV1 LR TUNER CVBS RF-SWITCH TDFC-G 116P Copyright©2007 LG Electronics. Inc. All right reserved. - 21 - LGE Internal Use Only Only for training and service purposes...
  • Page 22 I2C (HDCP) SDRAM 256Mbit I2C (HDCP) Flash memory 32Mbit S-VIDEO AV1 CVB S AV1 LR TUNER CVBS RF-SWITCH TDFC-G 116P Copyright©2007 LG Electronics. Inc. All right reserved. - 22 - LGE Internal Use Only Only for training and service purposes...

  • Page 23: Exploded View

    EXPLODED VIEW Copyright©2007 LG Electronics. Inc. All right reserved. - 24 - LGE Internal Use Only Only for training and service purposes...
  • Page 24 MEMO Copyright©2007 LG Electronics. Inc. All right reserved. - 23 - LGE Internal Use Only Only for training and service purposes...

  • Page 25: Exploded View Parts List

    Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 26: Replacement Parts List

    Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 27 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 28 Nov., 2007 P/NO : MFL40810701 Printed in Korea...

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