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LG 32LD320H Service Manual
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LG 32LD320H Service Manual

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LCD TV
SERVICE MANUAL
CHASSIS : LD91X
MODEL : 32LD320H
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL62461527 (1007-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
32LD320H-TA
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
Printed in Korea

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Summary of Contents for LG 32LD320H

  • 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 : LD91X MODEL : 32LD320H 32LD320H-TA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL62461527 (1007-REV00) Printed in Korea...

  • Page 2: Table Of Contents

    PRODUCT SAFETY ................. 3 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION ..............9 BLOCK DIAGRAM.................. 14 EXPLODED VIEW .................. 15 SVC. SHEET ....................Copyright © 2010 LG Electronics. Inc. All right reserved. - 2 - LGE Internal Use Only Only for training and service purposes...

  • Page 3: Product Safety

    An other abnormality exists that must be corrected before the receiver is returned to the customer. Copyright © 2010 LG Electronics. Inc. All right reserved. - 3 - LGE Internal Use Only Only for training and service purposes...
  • Page 4 Copyright © 2010 LG Electronics. Inc. All right reserved. - 4 - LGE Internal Use Only Only for training and service purposes...
  • Page 5 CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures. Copyright © 2010 LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...

  • Page 6: Specification

    3) The values specified are at approximate distance 50 cm from the LCD surface. 4) Ta= 25 °C ± 2 °C, VLCD= 12.0 V, fV= 60 Hz, Dclk= 74.25 MHz VBR_A= 1.65 V, ExtVBR_B= 100 % Copyright © 2010 LG Electronics. Inc. All right reserved. - 6 -...
  • Page 7 47.72 59.8 84.75 WXGA 1280*1024 63.595 60.0 108.875 SXGA FHD model 1920*1080 66.587 59.93 138.625 WUXGA FHD model Copyright © 2010 LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
  • Page 8 59.8 84.75 WXGA HDCP 1280*1024 63.595 60.0 108.875 SXGA HDCP/FHD model 1920*1080 67.5 60.00 138.625 WUXGA HDCP/FHD model Copyright © 2010 LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...

  • Page 9: Adjustment Instruction

    3) Click “Read” tab, and then load download file (XXXX.bin) by clicking “Read” fi lexxx.bin Copyright © 2010 LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
  • Page 10 • ad 00 10 [Adjust 1024*768 RGB] • aa 00 90 End Adjust mode * Required equipment : Adjustment R/C. Copyright © 2010 LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...
  • Page 11 • Check whether written EDID data is correct or not. * For SVC main Ass’y, EDID have to be downloaded to Insert Process in advance. Copyright © 2010 LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only...
  • Page 12 Item Condition Data(Hex) HDMI1 67030C001000B82D Manufacturer ID 1E6D HDMI2 67030C002000B82D Version Digital : 1 Revision Digital : 3 Copyright © 2010 LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...
  • Page 13 C. Serial number D/L must be conformed when it is produced in production line, because serial number D/L is mandatory by D-book 4.0. Copyright © 2010 LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...

  • Page 14: Block Diagram

    BLOCK DIAGRAM Copyright © 2010 LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...

  • Page 15: Exploded View

    X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. Copyright LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...
  • Page 16 2010.03.10 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MSTAR_1 Copyright © 2010 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR MSTAR_2 THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MAIN_2 Copyright © 2010 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 18 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. DDR2 DDR2 Copyright © 2010 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 19 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. INTERFACE NTERFACE Copyright © 2010 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 20 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. PCMCIA PCMCIA Copyright © 2010 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 21 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. HDMI HDMI Copyright © 2010 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 22 EAX62121501 2010.03.10 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2010 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 23 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. POWER POWER Copyright © 2010 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 24 2010.03.10 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. SCART Copyright © 2010 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 25 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR TUNER THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. TUNER Copyright © 2010 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 26 2010.03.10 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MODULE&CTL Copyright © 2010 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 27 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR NEC SUBMICOM THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2010 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 29 Contents of LCD TV Standard Repair Process Error symptom (High category) Error symptom (Mid category) Page Remarks No video/Normal audio No video/No audio Video error, video lag/stop A. Video error Color error Vertical/Horizontal bar, residual image, light spot, external device color error No power B.
  • Page 30 Standard Repair Process Established A. Video error 2010. 07 .27 Electronics 6-3 Error date LCD TV symptom No video/ Normal audio Revised date 1/13 First of all, Check whether all of cables between board is inserted properly or not. (Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable,,,) ☞A1 ☞A3 Replace Main Board...
  • Page 31 Standard Repair Process Established A. Video error 2010. 07 .27 Electronics 6-3 Error date LCD TV symptom No video/ No audio Revised date 2/13 ☞A5 Check various Check and Normal voltages of Power No Video/ replace voltage? Board ( 5V,12V,20V No audio MAIN B/D or 24V…)
  • Page 32 Standard Repair Process Established A. Picture Problem 2010. 07 .27 Electronics 6-3 Error date LCD TV symptom Picture broken/ Freezing Revised date 3/13 . By using Digital signal level meter ☞ A6 . By using Diagnostics menu on OSD Check RF Signal level ( Menu→Setup→Diagnostic) - Signal strength (Normal : over 50%) - Signal Quality (Normal: over 50%)
  • Page 33 Standard Repair Process Established A. Video error 2010. 07 .27 Electronics 6-3 Error date LCD TV symptom Color error Revised date 4/13 Other Module Replace module ☞A8 ☞ A10/ A11 ☞ A27 ※ Check Check color by input Replace and replace -External Input T-Con Color...
  • Page 34 Standard Repair Process Established A. Video error 2010. 07 .27 Electronics 6-3 Error date LCD TV symptom Vertical / Horizontal bar, residual image, Revised date 5/13 light spot, external device color error LGD Module Only Other Module Vertical/Horizontal bar, residual image, light spot Replace T-Con Board Replace And Adjust VCOM...
  • Page 35 Standard Repair Process Established B. Power error 2010. 07 .27 Electronics 6-3 Error date LCD TV symptom No power Revised date 6/13 ☞A17 ☞A19 DC Power on Replace Check Power LED Normal Check Power by pressing Power Key Power Power LED operation? On ‘”High”...
  • Page 36 Standard Repair Process Established B. Power error 2010. 07 .27 Electronics 6-3 Error date LCD TV symptom Off when on, off while viewing, power auto on/off Revised date 7/13 Check outlet ☞A22 Check Power Off Check A/C code Error? Normal? Replace Main B/D Mode Abnormal...
  • Page 37 Standard Repair Process Established C. Audio error 2010. 07 .27 Electronics 6-3 Error date LCD TV symptom Revised date No audio/ Normal video 8/13 ☞A24 ☞A25 Check user Check audio B+ No audio Normal menu > 20V or 24V of Screen normal voltage Speaker off...
  • Page 38 Standard Repair Process Established C. Audio error 2010. 07 .27 Electronics 6-3 Error date LCD TV symptom Wrecked audio/ discontinuation/noise Revised date 9/13 → Wrecked audio/discontinuation/noise is same after “Check input signal” compared to No audio ☞A26 Wrecked audio/ Check and replace Discontinuation/ Check audio speaker and...
  • Page 39 Standard Repair Process Established D. General Function Problem 2010. 07 .27 Electronics 6-3 Error date LCD TV symptom Remote control & Local switch checking Revised date 10/13 1. Remote control(R/C) operating error Replace Main B/D ☞A27 ☞A27 ☞A27 Check & Repair Check R/C itself Normal Normal...
  • Page 40 Standard Repair Process Established D. Function error 2010. 07 .27 Electronics 6-3 Error date LCD TV symptom External device recognition error Revised date 11/13 Check technical Check External Input and information Signal Technical input Component Replace Main B/D input? information? - Fix information Recognition error signal...
  • Page 41 Standard Repair Process Established E. Noise 2010. 07 .27 Electronics 6-3 Error date LCD TV symptom Circuit noise, mechanical noise Revised date 12/13 Replace inverter <With Inverter Module> Identify Check Circuit nose location of noise type noise Replace LIPS B/D <Without Inverter Module>...
  • Page 42 Standard Repair Process Established F. Exterior defect 2010. 07 .27 Electronics 6-3 Error date LCD TV symptom Exterior defect Revised date 13/13 Zoom part with Module Replace module Adjust VCOM exterior damage damage ☞A27 Cabinet Replace cabinet damage Remote controller Replace remote controller damage Stand...
  • Page 43 LCD TV Repair Process Index - Trouble shooting by input block (Component level check) Symptom (L) Input Block Page Remark Power Problem Power-up Boot fail No OSD Digital TV Analog TV AV (CVBS) Video Problem Component RGB(D-SUB) HDMI All Input Digital TV Audio Problem Analog TV...
  • Page 44 전자 - 6-2 Making 2010. 07 .27 LCD TV Symptom Power-Up Boot Fail Revision 26~42LD320H P800 Pin #7~#10 Check Power connector Replace Power Board Voltage Level = 5V ? OK ? P800 Pin #2 Replace MAIN B’D Q801 Voltage level = 5V ? P800 Pin #13, 14 = 12V Replace Power Board P800 Pin #17, 18 = 24V ?
  • Page 45 전자 - 6-2 Making 2010. 07 .27 LCD TV Symptom Power-Up Boot Fail Revision 22LD320H P801 Pin #5~#6 Check Power connector Replace Power Board Voltage Level = 5V ? OK ? P801 Pin #1, 2 = 15V? Replace Power Board MAIN B’D L803 = 3.3V ? Replace MAIN B’D IC801 MAIN B’D L813 = 1.26V ?
  • Page 46 전자 - 6-2 Making 2010. 07 .27 LCD TV Symptom No OSD Revision 22~42LD320H P800 Pin #13, 14 = 12V Check Power connector Replace Power Board P800 Pin #17, 18 = 24V ? OK ? P800 Pin #20 Replace MAIN B’D Q802 Voltage level = 2V ↑...
  • Page 47 전자 - 6-2 Making 2010. 07 .27 LCD TV Symptom No OSD Revision 22LD320H Check Power connector P801 Pin #1, 2 = 15V? Replace Power Board OK ? P801 Pin #9 Replace MAIN B’D Q802 Voltage level = 2V ↑ MAIN B’D L1300 = 12V ? Replace MAIN B’D Q806 Check LVDS Cable...
  • Page 48 전자 - 6-2 Making 2010. 07 .27 LCD TV Symptom Digital TV Video Problem Revision 22~42LD320H Check RF Cable MAIN B’D L1201 = 5V ? Replace MAIN B’D IC808 MAIN B’D L1202 = 3.3V ? Replace MAIN B’D IC809 MAIN B’D IC804 Replace MAIN B’D IC804 Pin #2 = 1.2V ? MAIN B’D R1210 Clock ?
  • Page 49 전자 - 6-2 Making 2010. 07 .27 LCD TV Symptom Analog TV Video Problem Revision 22~42LD320H Check RF Cable MAIN B’D L1201 = 5V ? Replace MAIN B’D IC808 MAIN B’D L1202 = 3.3V ? Replace MAIN B’D IC809 MAIN B’D IC804 Replace MAIN B’D IC804 Pin #2 = 1.2V ? MAIN B’D R1210 Clock ?
  • Page 50 전자 - 6-2 Making 2010. 07 .27 LCD TV Symptom AV No Video Problem Revision 22~42LD320H Check Signal format Is it supported? Check the AV Cable Check MAIN B’D R1117 MAIN B’D JK1100 Check Replace MAIN B’D JK1100 Video Signal ? Check MAIN B’D C210 Replace Video Signal ?
  • Page 51 Component No Video/ 전자 - 6-2 Making 2010. 07 .27 LCD TV Symptom No Color Problem Revision 22~42LD320H Check Signal format Is it supported? Check the Component Cable Check MAIN B’D R419 MAIN B’D JK400 Check Replace MAIN B’D JK400 Video Signal ? Check MAIN B’D C209, C215 (Y) C216 (Pb)
  • Page 52 전자 - 6-2 Making 2010. 07 .27 LCD TV Symptom RGB No Video Problem Revision 22~42LD320H Check Signal format Is it supported? Check the RGB Cable MAIN B’D P400 Pin #2 Video signal ? R437 has Vsync ? MAIN B’D P400 Check Replace MAIN B’D P400 R440 has Hsync ? Check MAIN B’D C208 (Video)
  • Page 53 전자 - 6-2 Making 2010. 07 .27 LCD TV Symptom RGB No Color Problem Revision 22~42LD320H Check Signal format Is it supported? Check the RGB Cable MAIN B’D P400 Pin #3 (BLUE) MAIN B’D P400 Check Replace MAIN B’D P400 Pin #2 (GREEN) Pin #1 (RED) Video signal ?
  • Page 54 전자 - 6-2 Making 2010. 07 .27 LCD TV Symptom HDMI 1~2 All No Video Problem Revision 22~42LD320H Check Signal format Is it supported? Check the HDMI Cable Download EDID Check the ADJUST MENU (Refer to Adjustment Spec) EDID OK ? Replace MAIN B’D IC107 (HDCP KEY) Replace MAIN B’D IC 100...
  • Page 55 전자 - 6-2 Making 2010. 07 .27 LCD TV Symptom HDMI1 or 2 No Video Problem Revision 22~42LD320H Check Signal format Is it supported? Check the HDMI Cable MAIN B’D JACK Check JK600 -> HDMI1 JK601 -> HDMI2 Replace MAIN B’D IC 100 ※...
  • Page 56 전자 - 6-2 Making 2010. 07 .27 All Source no Audio Problem LCD TV Symptom Revision 22~42LD320H Check The Speaker Replace Speaker Check Speaker Cable Replace Speaker Cable CHECK MAIN B’D Replace MAIN B’D ※ If headphone is connected, Speaker sound doesn’t work. JK700 or JK701 JK700 or JK701 MAIN B’D...
  • Page 57 전자 - 6-2 Making 2010. 07 .27 Digital TV No Audio Problem LCD TV Symptom Revision 22~42LD320H Digital TV Video OK ? Replace MAIN B’D IC 100...
  • Page 58 전자 - 6-2 Making 2010. 07 .27 Analog TV No Audio Problem LCD TV Symptom Revision 22~42LD320H Analog TV Video OK ? Check MAIN B’D Replace MAIN B’D IC100 C231 Signal (SIF) MAIN B’D TU1200 Replace MAIN B’D TU1200 Pin #17 Signal (SIF)
  • Page 59 전자 - 6-2 Making 2010. 07 .27 AV1 No Audio Problem LCD TV Symptom Revision 22~42LD320H AV1 Video OK ? Check the SCART Cable Check MAIN B’D JK1100 Replace MAIN B’D JK1100 MAIN B’D C229 (Right Sound) Replace MAIN B’D IC 100 C230 (Left Sound) signal ? Check MAIN B’D...
  • Page 60 전자 - 6-2 Making 2010. 07 .27 Component No Audio Problem LCD TV Symptom Revision 22~42LD320H Component Video OK ? Check the CVBS Cable Check MAIN B’D JK400 Replace MAIN B’D JK400 MAIN B’D C2013 (Right Sound) Replace MAIN B’D IC 100 C2014 (Left Sound) signal ? Check MAIN B’D...
  • Page 61 전자 - 6-2 Making 2010. 07 .27 RGB, HDMI-PC No Audio Problem LCD TV Symptom Revision 22~42LD320H RGB Video OK ? Check the PC Audio Cable Check MAIN B’D JK401 Replace MAIN B’D JK401 MAIN B’D C2015 (Right Sound) Replace MAIN B’D IC 100 C2016 (Left Sound) signal ? Check MAIN B’D...
  • Page 62 전자 - 6-2 Making 2010. 07 .27 HDMI-DTV No Audio Problem LCD TV Symptom Revision 22~42LD320H HDMI Video OK ? Check the ADJUST MENU Download EDID EDID OK ? (Refer to Adjustment Spec) Replace MAIN B’D IC100 Check the HDMI Cable...
  • Page 63 전자 - 6-2 Making 2010. 07 .27 AV1 No Audio Out Problem LCD TV Symptom Revision 22~42LD320H Check the Trouble Shooting Guide Analog TV Audio OK Analog TV No video Check the SCART Cable Check MAIN B’D JK1100 Replace MAIN B’D JK1100 MAIN B’D R239 (Right Sound) Replace MAIN B’D IC 100...
  • Page 64 전자 - 6-2 Making 2010. 07 .27 Headphone No Audio Problem LCD TV Symptom Revision 22~42LD320H Check the Trouble Shooting Guide Speaker Audio OK Related to Audio Problem Check the Headphone Cable Check MAIN B’D JK700 or JK701 Replace MAIN B’D JK700 or JK701 MAIN B’D R237 (Right Sound) Replace MAIN B’D IC 100...
  • Page 65 전자 - 6-2 Making 2010. 07 .27 SPDIF No Audio Problem LCD TV Symptom Revision 22~42LD320H Check the Trouble Shooting Guide Speaker Audio OK Related to Audio Problem Check the SPDIF Cable Check MAIN B’D JK403 Replace MAIN B’D JK403 Check MAIN B’D R230 PWM Signal ? Replace MAIN B’D IC 100...
  • Page 66 전자 - 6-2 Making 2010. 07 .27 USB No Connect Problem LCD TV Symptom Revision 22~42LD320H Check that the USB Memory & HDD are supported by Spec (Refer to User Manual’s USB cautions) Check MAIN B’D Replace MAIN B’D JK405 JK405 OK ? Check MAIN B’D Replace MAIN B’D IC 100...
  • Page 67 전자 - 6-2 Making 2010. 07 .27 Remote Control Problem LCD TV Symptom Revision 22~42LD320H Check MAIN B’D P1305 Replace it Wafer & Connector Check IR B’D P1 Wafer Replace IR B’D & Connector...
  • Page 68 전자 - 6-2 Making 2010. 07 .27 Remote Control Problem LCD TV Symptom Revision 22LD320H Check MAIN B’D P1305 Replace it Wafer & Connector IR B’D IC1 Pin #3 Replace IR B’D IC1 Replace MAIN B’D IC100 Voltage 4V ↑ ? Check IR B’D P1 Wafer Replace MAIN B’D IC100 &...
  • Page 69 전자 - 6-2 Making 2010. 07 .27 Clock display Problem LCD TV Symptom Revision 22~42LD320H - Direct user setting Check the “Clock Display” item Replace the “Clock display” item on SVC Menu from No to Yes . Check the “Time” item Check the current time establishment on user Menu on “Time”...
  • Page 70 전자 - 6-2 Making 2010. 07 .27 Clock display Problem LCD TV Symptom Revision 22~42LD320H - Setting that use TTX information & DTV clock information Check the “Clock Display” item on SVC Menu - Replace the “Clock display” item from No to Yes Select “...
  • Page 71 전자 - 6-2 Making 2010. 07 .27 RJP Problem LCD TV Symptom Revision 22~42LD320H Check the “RJP” item Replace the “RJP” item on SVC Menu from No to Yes . Check the supply 12V power Check the supply power. of RJP.(JK409_Pin1) Replace JK409 Check the JK409...
  • Page 72 전자 - 6-2 Making 2010. 07 .27 IR Out Problem LCD TV Symptom Revision 22~42LD320H Check the IR waveform Replace the Preamp of IR ass’y. of R1300 Check the IR waveform Re-soldering or replace of IC1100_3,6,11Pin the defect part Check the RS-232C Pin4 / HDMI Pin14 Replace it...
  • Page 73 전자 - 6-2 Making 2010. 07 .27 Buzzer Problem LCD TV Symptom Revision 22~42LD320H Check the “Time” item Check the current time establishment on user Menu on “Time” item of user menu Check the “Time” item Set to “Alarm Time” on user Menu Check the IC 1405 &...
  • Page 74 전자 - 6-2 Making 2010. 07 .27 External Speaker Problem LCD TV Symptom Revision 22~42LD320H Check the input Change input source. source IC100 operate Re-solder or replace normally? the IC100 IC702 operate Re-solder or Replace normally? the IC702 Replace it Check JK406 Check the external Replace the external speaker.

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