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Manuale per l’uso LG Electronics 47LT640H-ZA

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  • LG Electronics 47LT640H-ZA - page 1

    Printed in Korea P/NO : MFL67368126 (1207-REV00) CHASSIS : LD2AZ MODEL : 47L T640H 47L T640H-ZA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. LED LCD TV SER VICE MANUAL North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com Internal Use Only ...

  • LG Electronics 47LT640H-ZA - page 2

    - 2 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes CONTENTS CONTENTS .............................................................................................. 2 SAFETY PRECAUTIONS ........................................................................ 3 SERVICING PRECAUTIO ...

  • LG Electronics 47LT640H-ZA - page 3

    - 3 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 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 ...

  • LG Electronics 47LT640H-ZA - page 4

    - 4 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes SER VICING PRECAUTIONS CAUTION: Before servicing receivers covered by this service manual and its supplements and addenda, read and follow the SAFETY PRECAUTIONS on page 3 of this publication. NOTE : If unforeseen circumstances ...

  • LG Electronics 47LT640H-ZA - page 5

    - 5 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes IC Remove/Replacement Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent at against the cir- cuit foil. When holes are the slotted type, the following technique shoul ...

  • LG Electronics 47LT640H-ZA - page 6

    - 6 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes SPECIFICA TION NOTE : Specifications and others are subject to change without notice for improvement . 1. Application range This specification is applied to the LCD TV used LD2AZ chassis. 2. Requirement for T est Each part is te ...

  • LG Electronics 47LT640H-ZA - page 7

    - 7 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes No. Item Specication Remarks 6 RGB Input RGB-PC Analog(D-SUB 15PIN) 7 HDMI Input (3EA) HDMI1-DTV/DVI HDMI2-DTV HDMI3-DTV PC(HDMI version 1.3) Support HDCP The number of Input ports is different by model. 8 Audio Input (2EA) R ...

  • LG Electronics 47LT640H-ZA - page 8

    - 8 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 5. V ideo resolutions (2D) 5.1. Component Input (Y , C B /P B , C R /P R ) 5.2. RGB Input (PC) No. Resolution H-freq(kHz) V -freq(Hz) Pixel clock(MHz) Proposed 1 720*480 15.73 60.00 13.5135 SDTV ,DVD 480I 2 720*480 15.73 59.94 1 ...

  • LG Electronics 47LT640H-ZA - page 9

    - 9 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 5.3. HDMI Input(PC/DTV) No. Resolution H-freq(kHz) V -freq.(Hz) Pixel clock(MHz) Proposed Remark PC(DVI) DDC 1 640*350 31.468 70.09 25.17 EGA X 2 720*400 31.469 70.08 28.32 DOS O 3 640*480 31.469 59.94 25.17 VESA(VGA) O 4 800*60 ...

  • LG Electronics 47LT640H-ZA - page 10

    - 10 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes ADJUSTMENT INSTRUCTION 1. Application Range This specification sheet is applied to all of the LCD TV with LD2AZ chassis. 2. Designation (1) The adjustment is according to the order which is designated and which must be followed ...

  • LG Electronics 47LT640H-ZA - page 11

    - 1 1 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 3.1. ADC Process (1) ADC - Enter Service Mode by pushing "ADJ" key , - Enter Internal ADC mode by pushing "►" key at "7. ADC Calibration". < Ca u ti o n> Using "P-ONL Y" key of t ...

  • LG Electronics 47LT640H-ZA - page 12

    - 12 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes ▪ Auto adjustment Map(using RS-232C to USB cable) RS-232C COMMAND [CMD ID DA T A] Wb 00 00 White Balance Start Wb 00 ff White Balance End <Caution> Color T emperature : COOL, Medium, W arm. One of R Gain/G Gain/ B Gain ...

  • LG Electronics 47LT640H-ZA - page 13

    - 13 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes (1) HD RGB EDID data (2) HD HDMI EDID data (3) Detail EDID Options are below a. Product ID b. Serial No: Controlled on production line. c. Month, Y ear: Controlled on production line: ex) Week : '01' -> '01&ap ...

  • LG Electronics 47LT640H-ZA - page 14

    - 14 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 5. Model name & Serial number D/L ▪ Press "Power on" key of service remote control. (Baud rate : 1 15200 bps) ▪ Connect RS232 Signal Cable to RS-232 Jack. ▪ Write Serial number by use RS-232. ▪ Must check ...

  • LG Electronics 47LT640H-ZA - page 15

    - 15 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 6. CI+ Key Download method 6.1. Download Procedure (1) Press "Power on" key of a service R/C. (Baud rate : 1 15200 bps) (2) Connect RS232-C Signal Cable. (3) Write CI+ Key through RS-232-C. (4) Check whether the key w ...

  • LG Electronics 47LT640H-ZA - page 16

    - 16 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes F - SC A RT IF_N/P_MSTA R DDR3 (1GB) IC1201 NAND Flash HYNIX(2G) IC102 Digital amp (NTP7 0 00) IC501 Pb SC1_CVBS/R/G/B/FB_IN I2S Tuner - S001D) TU3702 (P1901) Buffer IC1902 PCM_A [0: 7] TU_CVBS PCM_A [0: 7] DDR3 (1GB) IC1202 B_ ...

  • LG Electronics 47LT640H-ZA - page 17

    - 17 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes L V1 300 200 540 521 530 550 810 820 120 500 501 510 400 900 910 A2 A4 A10 * Set + Stand * Stand Base + Body EXPLODED VIEW Many electrical and mechanical parts in this chassis have special safety-related characteristics. These ...

  • LG Electronics 47LT640H-ZA - page 18

    THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. /PCM_IOWR 8pF OPT C106 /PCM_CD /PCM_WE 22 R111 5V_DET_HDMI ...

  • LG Electronics 47LT640H-ZA - page 19

    THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. D1-_HDMI2 0.1uF C252 +1.10V_VDDC 0.047uF C209 33 R257 0.04 ...

  • LG Electronics 47LT640H-ZA - page 20

    THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. 4.7K R383 AMP_MUTE NEC_RX 22 R397 EXT5V_CTRL 10K R381 FLMD ...

  • LG Electronics 47LT640H-ZA - page 21

    THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. +3.5V_ST 0.1uF C451 OPT 100K R404 PD_+24V 10K R430 OPT 0.1 ...

  • LG Electronics 47LT640H-ZA - page 22

    THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. 390pF 50V C533 10K R521 33pF 50V C509 1000pF 50V C505 1000 ...

  • LG Electronics 47LT640H-ZA - page 23

    THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. 1000pF 50V C603 +3.5V_ST 100 R613 +3.5V_ST LED_R/BUZZ 0.1u ...

  • LG Electronics 47LT640H-ZA - page 24

    THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. RXA1+ RXA1- 0 OPT R713 RXA0- 3.3K OPT R705 RXB3- RXA3+ RXB ...

  • LG Electronics 47LT640H-ZA - page 25

    THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. 2.7K R888 HDMI_1 DDC_SCL_2 5V_DET_HDMI_4 D804 OPT DDC_SDA_ ...

  • LG Electronics 47LT640H-ZA - page 26

    THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. 0.1uF C1005 UART_RX 0.1uF C1002 0.33uF C1000 0.1uF C1003 + ...

  • LG Electronics 47LT640H-ZA - page 27

    THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. 100pF 50V C1108 10K R1104 OPT 1K R1125 HEAD_PHONE RGB_DDC_ ...

  • LG Electronics 47LT640H-ZA - page 28

    THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. A-MDMU B-MDQL2 B-MDQU2 B-MA10 B-MBA1 A-MWEB 0.1uF C1243 0. ...

  • LG Electronics 47LT640H-ZA - page 29

    THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. SPI_SCK +3.5V_ST KRC103S Q1300 OPT E B C +3.5V_ST 0.1uF C1 ...

  • LG Electronics 47LT640H-ZA - page 30

    THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. 0.1uF 16V C1419 100pF 50V C1406 IF_AGC_MAIN 100 R1402 0 R1 ...

  • LG Electronics 47LT640H-ZA - page 31

    THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. 4.7K R1527 OPT 4.7uF 16V C1510 PI_LG1001 PI_TS_DATA[7] 1K ...

  • LG Electronics 47LT640H-ZA - page 32

    THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. 33pF EXT_SPK C1614 1K R1666 AV2 SC1/COMP1_L_IN 15K EU_OPT ...

  • LG Electronics 47LT640H-ZA - page 33

    THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. 1uF 25V EXT_SPK C1709 +5V_SUB_AMP EXT_SPK_DET EXT_SPK_R- E ...

  • LG Electronics 47LT640H-ZA - page 34

    THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. M41T83RMY6F IC1801 3 NF_2 2 NF_1 4 NC_2 1 NC_1 6 DU 5 RST ...

  • LG Electronics 47LT640H-ZA - page 35

    THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. 0.1uF 16V C1907 +5V_Normal BLM18PG121SN1D L1902 CI_MCLKI 0 ...

  • LG Electronics 47LT640H-ZA - page 36

    THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MDL61930001 DO_NOT_APPLY GAS5 MDL61930001 GAS3 DO_NOT_APPL ...

  • LG Electronics 47LT640H-ZA - page 37

    ...

  • LG Electronics 47LT640H-ZA - page 38

    Contents of LCD TV Standard Repair Process No. Error symptom (High ca tegory) Error symptom (Mid c ategory) Page Remarks 1 A. Video error No video/Normal audio 1 2 No video/No audio 2 3 Video error, video lag/stop 3 4 Color error 4 5 Vertical/Horizontal ba r, residual i mage, light spot, external d evice color error 5 6 B. Power error No power 6 7 ...

  • LG Electronics 47LT640H-ZA - page 39

    Normal audio Y N Move to No video/No audio No video Normal audio Check Back Light On with naked ey e On Y N Check Main Board 3.5V,12V,3.3V, 1.26V, 1.5V etc. Normal voltage Y N Replace T-con Board or module Repair Power Board or parts Check Power Board 24V,12V,3.5V output Normal voltage Y Replace Inverter or module N Repair Power Board or parts End ...

  • LG Electronics 47LT640H-ZA - page 40

    Normal voltage? Check various voltages of Power Board ( 3.5V,12V,20V or 24V…) No Video/ No audio Check and replace MAIN B/D Y Replace Power Board and repair parts N End Standard Repair Process A. Video error No video/ No audio ☞ A4 Establis hed date Revised date 2/13 LCD TV Error symptom 2 Copyright © 2012 LG Electronics. Inc. All rights reser ...

  • LG Electronics 47LT640H-ZA - page 41

    A. Picture Problem Picture bro k en/ Freezing Y N N Check R F Signal le vel Normal Signal? Check RF Cable Connection 1. Reconnec tion Check S/W Version S/W Upgrade Check w hether other e quipments have probl e m or not. (By connecting RF Cabl e at other equipment) → DVD Play er ,S et-Top-Box, Different maker TV etc` SVC Bulletin? Repla ce Main B/ ...

  • LG Electronics 47LT640H-ZA - page 42

    Color error? Y N ※ Check and replace Link Cable (LVDS) and contact condition Y N Replace Main B/D Color error? Check error color input mode Check color by input -External Input -COMPONENT - RGB - HDMI/DVI Y External device /Cable normal External Input/ Component error Check external device and cable Y External device /Cable normal RGB/ HDMI/DVI e ...

  • LG Electronics 47LT640H-ZA - page 43

    Screen normal? N Y Check external device connection condition Y N Check and replace Link Cable Normal? Y N Screen normal? Replace Main B/D Replace module Check color condi tion by input -External Input -Component - RGB - HDMI/DVI End Vertical/Horizontal bar, r esidual image, light spot Request repair for external device A. Video error Vertica l / H ...

  • LG Electronics 47LT640H-ZA - page 44

    B. Power error No power Power LED On? Y N DC Power on by pressing Power Key On Remote control Y N Normal operation? Check Power On ‘”High” Check Power cord was inserted properly Check Power LED Replace Power B/D Measure voltage of each o u tpu t of Power B/D N Y Normal voltage? Replace Main B/D N Y OK? Replace Main B/D N Y Normal? Check ST-BY ...

  • LG Electronics 47LT640H-ZA - page 45

    B. Power error Off when on, off w hile vi ewing, power auto on/off Error? N Y Check Power Off Starus(instart menu Fix A/C cord & Outlet and check each 3 phase out Check A/C cord Check for all 3- phase power out Check outlet Replace Main B/D CPU Abnormal (If Power Off mode is not display ed) Check Power B/D vol t ag e Y N Replace Main B/D Normal ...

  • LG Electronics 47LT640H-ZA - page 46

    No audio Screen normal Check user menu > Speaker off Off N Y Cancel OFF Check audio B+ 20V or 24V of Power Board Normal vol t ag e Y N Replace Power Board and repair parts Check Speaker disconnection N Y Replace Speaker Replace MAIN Board End C. Audio error No audio/ Normal v id eo ☞ A24 ☞ A25 Disconnection Establis hed date Revis e d date 8 ...

  • LG Electronics 47LT640H-ZA - page 47

    → abnormal audio/di sconti nuation/n oise is same af ter “Check input signal” compared to No audio C. Audio error Wrecked audi o/ disco ntinu ation /noise Wrecked audio/ Discontinuation/ Noise for all audio Check and replace speaker and connector Wrecked audio/ Discontinuation/ Noise only for D-TV Wrecked audio/ Discontinuation/ Noise only fo ...

  • LG Electronics 47LT640H-ZA - page 48

    D. General Function Problem Remote co ntrol & Local sw itch checking Y N 1. Remote control(R/C) op erating error Check R/C itself Operation Norm al operating? Normal operating? Y Close Replace R/ C If R/C operate, Explain th e customer cause is inter ference from light in room. Check R/C Operat ing When turn off light in room Check & Replac ...

  • LG Electronics 47LT640H-ZA - page 49

    Check technical informatio n - Fix information - S/W Version N Y Technical information? Check input signal Signal input? Y N External Input and Component Recognition error Check and fix externa l devic e/cable RGB,HDMI/ DVI, Optical Recognition error Replace Main B/D Replace Main B/D Fix in accordance with technical information D. Function error Ex ...

  • LG Electronics 47LT640H-ZA - page 50

    Check location of noise Identify nose type Circuit noise Replace PSU(with LED dri ver) Replac e L E D driv er Mechanic al noise Check location of noise OR ※ When the nose is severe, rep lace the module (For mode ls with fix infor mation, upgrade the S/W or provide th e d es cript ion) OR ※ If there is a “Tak Tak ” noise from the cabinet, re ...

  • LG Electronics 47LT640H-ZA - page 51

    Replace module Zoom par t with exter ior damage Module damage Cabinet damage Replace cabinet Replace remot e controller Remote controller damage Stand dent Replace stand F. Exterior defect Exterior defect Establis hed date Revis e d date 13/13 LCD TV Error symptom Standard Repair Process 13 Copyright © 2012 LG Electronics. Inc. All rights reserved ...

  • LG Electronics 47LT640H-ZA - page 52

    MENU - Æ red key(customer support - Æ signal test - Æ select channel When the signal is strong, use the attenuator (-10dB, -15dB, -20dB etc.) Standard Repair Process Detail Technical Manual TUNER input s ignal strengt h checking me thod A. Video error_Video error, video lag/stop <ALL MODELS> A6 Established date Revis ed date Error symptom ...

  • LG Electronics 47LT640H-ZA - page 53

    Standard Repair Process Detail Technical Manual LCD-TV Version ch ecking method A. Video error_Video error, video lag/stop 1. Checking method for remote controller for adjustment Press the IN-START with the remote controll er for adjustment Version <ALL MODELS> A7 Established date Revis ed date Error symptom Content LCD TV A7 Copyright © 201 ...

  • LG Electronics 47LT640H-ZA - page 54

    Standard Repair Process Detail Technical Manual Adjustment Test p atte rn - ADJ Key A. Video error_Color error You can view 6 types of patterns using the ADJ Key Checking item : 1. Defective pixel 2. Resid ual image 3. MODULE error (ADD-BAR,SCAN BAR..) 4.Video error (Classificati on of MODULE or Main-B/D!) A12 Established date Revis ed date Error s ...

  • LG Electronics 47LT640H-ZA - page 55

    Solder defe ct, CNT Broken T-Con Defect, CNT Broken T-Con Defect, CNT Broken T-Con Defect, CNT Broken Solder defe ct, CNT Broken Solder defect, CNT Broke n Solder defe ct, CNT Broken Solder defe ct, CNT Broken Abnormal Power Section Solder defe ct, Short/Crack Abnormal Power Section Solder defe ct, Short/Crack Appendix : Exchange T-Con Board (1) A ...

  • LG Electronics 47LT640H-ZA - page 56

    Abnormal Power Section Solder defe ct, Short/Crack Abnormal Power Section Solder defe ct, Short/Crack Fuse Open, Abnormal power section Noise GRADATION GRADAT ION Abnormal Display Appendix : Exchange T-Con Board (2) A - 2/5 Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only ...

  • LG Electronics 47LT640H-ZA - page 57

    Appendix : Exchange PSU(LED driver) No Light Dim Light Dim Light Dim Light No picture/Sound Ok A - 3/5 Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only ...

  • LG Electronics 47LT640H-ZA - page 58

    Appendix : Exchange the Module (1) Panel Mura, Li ght leakage Press damage Crosstalk Crosstalk Press damage Panel Mura, Li ght leakage Press damage A - 4/5 Un-repairable Cases In this case please exchange the module. Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only ...

  • LG Electronics 47LT640H-ZA - page 59

    Vertical Block Source TAB IC Defect Horizontal Block Gate TAB IC Defect Gate TAB IC Defect Gate TAB IC Defect Vertical Line Source TAB IC Defect Vertical Block Source TAB IC Defect Horizontal Block Gate TAB IC Defect Horizontal line Gate TAB IC Defect Gate TAB IC Defect Horizontal Block Gate TAB IC Defect Appendix : Exchange the Module (2) A - 5/5 ...

  • LG Electronics 47LT640H-ZA - page 60

    Entry method 1. Press the IN-START button of the remote controller for adjustment 2. Check the entry into adjustment item 3 Standard Repair Process Detail Technical Manual POWER OFF MODE checking m ethod B. Power error _Off when on, off whi ling viewing <ALL MODELS> A22 Established date Revis ed date Error symptom Content LCD TV A22 Copyright ...

  • LG Electronics 47LT640H-ZA - page 61

    Checking metho d 1. Press the MENU button on the remote controller 2. Select the AUDIO function of th e Menu 3. Select TV Speaker from Off to On Standard Repair Process Detail Technical Manual Checking method in menu w hen there is no audio C. Audio error_No audio/Normal video <ALL MODELS> A24 Established date Revis ed date Error symptom Cont ...

Fabbricante LG Electronics Categoria Flat Panel Television

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Se non hai risolto il problema con LG Electronics 47LT640H-ZA con l'aiuto del manuale che hai trovato, fai una domanda utilizzando il modulo sottostante. Se un utente ha avuto un problema simile con LG Electronics 47LT640H-ZA è probabile che voglia condividere il modo di risolverlo.

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