Page 2 - CONTENTS
- 2 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes CONTENTS CONTENTS .............................................................................................. 2 SAFETY PRECAUTIONS ................................................
Page 3 - General Guidance; isolation Transformer should always be used; Before returning the receiver to the customer,; AC leakage current check; Leakage Current Cold Check(Antenna Cold Check); Do not use a line Isolation Transformer during this check.; Leakage Current Hot Check circuit; IMPORTANT SAFETY NOTICE; SAFETY PRECAUTIONS
- 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 e...
Page 4 - SERVICING PRECAUTIONS; CAUTION
- 4 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes SERVICING 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 ...
Page 5 - IC Remove/Replacement; Removal; Circuit Board Foil Repair; At IC Connections
- 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 flat against the cir- cuit foil. When holes are...
Page 6 - SPECIFICATION; Requirement for Test
- 6 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes SPECIFICATION NOTE : Specifications and others are subject to change without notice for improvement. 1. Application range This specification is applied to the LCD TV used LD2AY ch...
Page 8 - DTV
- 8 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 5.2. RGB Input (PC) No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed 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....
Page 9 - ADJUSTMENT INSTRUCTION; Main PCB check process
- 9 - 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 LD2AY chassis. 2. Designation (1) The adjustment is according to the orde...
Page 10 - Total Assembly line process
- 10 - 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". <Caution> ...
Page 14 - (4) Check whether the key was downloaded or not at ‘In Start’
- 14 - 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 : 115200 bps) (2) Connect RS232-C Signal Cable. (3) Write CI+ Key...
Page 15 - LR; BLOCK DIAGRAM
- 15 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes F -S C AR T IF _N /P _M ST AR D D R 3 (1 G B ) IC 12 01 N AN D F la sh H YN IX (2 G ) IC 10 2 D ig ita l a m p (N TP 70 00 ) IC 50 1 Pb SC 1_ C VB S/ R /G /B /F B _I N I2 S Tuner...
Page 16 - EXPLODED VIEW
- 16 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes A2 A2 1 A9 A3 1 A1 0 * Set + Stand * Stand Base + Body 90 0 200 400 540 521 820 91 0 120 30 0 51 0 50 1 50 0 LV 1 EXPLODED VIEW Many electrical and mechanical parts in this chass...
Page 17 - EMEA INTERACTIVE
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FORTHE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. /PCM_IOWR 8...
Page 18 - N o r m a l 2 . 5 V
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FORTHE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. D1-_HDMI2 0...
Page 20 - S 7 L R c o r e 1 . 2 V v o l t; FOR LPB Download; ’ E R R O R _ O U T ’ i s u s e d f o r
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FORTHE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. + 3 . 5 V _...
Page 22 - CONTROL
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FORTHE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. 1 0 0 0 p F...
Page 23 - C h a n g e i n S 7 L R
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FORTHE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. RXA1+ RXA1-...
Page 31 - F u l l S c a r t / C o m p 1; COMPONENT2
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FORTHE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. 3 3 p F EXT...
Page 33 - EXTERNAL_POWER DETECTION
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FORTHE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. M41T83RMY6F...
Page 34 - * O p t i o n n a m e o f t h i s p a g e : C I _ S L O T
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FORTHE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. 0 . 1 u F16...
Page 35 - SMD GASKET
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FORTHE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MDL61930001...
Page 37 - Contents of LCD TV Standard Repair Process
Contents of LCD TV Standard Repair Process No. Error symptom (High category) Error symptom (Mid category) 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 bar, residual image, light spot, external device...
Page 38 - Precaution; Standard Repair Process; LCD TV
Normal audio Y N Move to No video/No audio No videoNormal audio Check Back LightOn with naked eye On Y N Check Main Board3.5V,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 Normalvoltage Y Replace Inverter ...
Page 39 - Established; Error
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 Established date Revised date 2/13 LCD TV Error symptom 2 Copyright ©...
Page 41 - Check; RGB
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 andcable Y E...
Page 42 - External device screen error-Color error; Check Test pattern
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 condition by input-External Input-Component - RGB - HDMI/DVI End Vertical/Horizontal bar, residual image, light spot Request repair fo...
Page 44 - * Please refer to the all cases which
B. Power error Off when on, off while viewing, power auto on/off Error? N Y Check Power OffStarus(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 displayed)Check Pow...
Page 47 - D. General Function Problem; Cable connection
D. General Function Problem Remote control & Local switch checking Y N 1. Remote control(R/C) operating error Check R/C itself Operation Normal operating? Normal operating? Y Close Replace R/C If R/C operate, Explain the customer cause is interference from light in room. Check R/C Operating When...
Page 51 - Standard Repair Process Detail Technical Manual
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 signal strength checking method A. Video error_Video error, video lag/stop <ALL MODELS> A6 E...
Page 52 - Checking method for remote controller for adjustment
Standard Repair Process Detail Technical Manual LCD-TV Version checking method A. Video error_Video error, video lag/stop 1. Checking method for remote controller for adjustment Press the IN-START with the remote controller for adjustment Version <ALL MODELS> A7 Established date Revised date E...
Page 53 - You can view 6 types of patterns using the ADJ Key
Standard Repair Process Detail Technical Manual Adjustment Test pattern - ADJ Key A. Video error_Color error You can view 6 types of patterns using the ADJ Key Checking item : 1. Defective pixel 2. Residual image 3. MODULE error (ADD-BAR,SCAN BAR..) 4.Video error (Classification of MODULE or Main-B/...
Page 57 - In this case please exchange the module.
Appendix : Exchange the Module (1) Panel Mura, Light leakage Press damage Crosstalk Crosstalk Press damage Panel Mura, Light 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 serv...
Page 60 - Checking method; Press the MENU button on the remote controller
Checking method 1. Press the MENU button on the remote controller 2. Select the AUDIO function of the Menu 3. Select TV Speaker from Off to On Standard Repair Process Detail Technical Manual Checking method in menu when there is no audio C. Audio error_No audio/Normal video <ALL MODELS> A24 Es...
