LG 47LS679C User Manual

Printed in KoreaP/NO : MFL67360741 (1209-REV00)CHASSIS : LD21BMODEL : 47LS679C 47LS679C-ZCCAUTIONBEFORE SERVICING THE CHASSIS,READ THE SAFETY PRECAU

- 10 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposesADJUSTMENT INSTRUCTION1. App

- 11 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposes3.1. ADC Process(1) ADC- Ent

- 12 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposes3.4. Function Check- Check d

- 13 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposes* Manual W/B process using a

- 14 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposes5. HI-POT Test5.1. HI-POT au

- 15 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposes7. MAC Address & CI+ key

- 16 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposes Screw specification and ap

- 17 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposesBLOCK DIAGRAMEthernetRGB PCS

- 18 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposesA7A2A10900300200400540521530

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

- 2 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposesCONTENTSCONTENTS ...

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

THERMALTHERMALTHERMALTHE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELE

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

USB DOWN STREAMUSB DOWN STREAMUSB DOWN STREAMUSB DOWN STREAMTHE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PR

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

Fiber OpticTHE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SH

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

- 3 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposesMany electrical and mechanica

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

THERMALTHE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK

THERMALTHE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

THERMALTHE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK

Contents of LCD TV Standard Repair ProcessNo. Error symptom (High category) Error symptom (Mid category) Page Remarks1A. Video errorNo video/Normal au

Contents of LCD TV Standard Repair Process Detail Technical ManualNo. Error symptom Content Page Remarks1A. Video error_ No video/Normal audio Check L

- 4 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposesSERVICING PRECAUTIONSCAUTION:

Normal audioYNMove to No video/No audioNo videoNormal audioCheck Back LightOn with naked eyeOnYNCheck Power Board12v,3.5v etc.Normal voltageYNReplace

Normalvoltage?Check various voltages of Power Board ( 3.5V,12V,20V or 24V…)No Video/No audioCheck and replace MAIN B/DYReplace Power Board and repair

A. Video errorPicture broken/ FreezingYN☞ A5NCheck RF Signal levelNormal Signal?Check RF Cable Connection1. Reconnection2. Install BoosterCheckS/W Ver

A. Video errorTuning fail, Picture broken/ FreezingYN☞ A5Check RF Signal levelNormal Signal?CheckS/W VersionS/W UpgradeSVC Bulletin?Normal Picture?YNY

Colorerror?YN※ Check and replace Link Cable(LVDS) and contact conditionYNReplace Main B/DColorerror?Check error color input modeCheck color by input-E

Screennormal?NYCheck external device connection conditionYNCheck and replace Link CableNormal?YScreennormal?Replace moduleCheck color condition by inp

B. Power errorNo powerPower LEDOn?YNDC Power onby pressing Power Key On Remote controlYNNormal operation?Check Power On ‘”High”Check Power cordwas in

B. Power errorOff when on, off while viewing, power auto on/offError?NYCheck Power OffModeFix A/C cord & Outlet and check each 3 phase outCheck A/

No audioScreen normalCheck user menu > Speaker offOffNYCancel OFF Check audio B+ 24V of Power BoardNormalvoltageYNReplace Power Board and repair p

→ abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audioC. Audio errorWrecked audio/ discontinuation/noise Wreck

- 5 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposesIC Remove/ReplacementSome cha

D. Function errorRemote control & Local switch checkingYN1. Remote control(R/C) operating errorCheck R/C itself OperationNormaloperating?Normalope

Check technical information- Fix information- S/W VersionNYTechnical information?Check input signalSignalinput?YNExternal Input andComponentRecognitio

Check location of noiseIdentify nose typeCircuit noiseReplace PSU (with LED driver)Replace LED driver Mechanical noiseCheck location of noiseOR※ When

Replace moduleZoom part with exterior damageModuledamageCabinetdamageReplace cabinetReplace remote controllerRemote controllerdamageStanddentReplace s

- 6 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposesSPECIFICATIONNOTE : Specifica

- 7 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposesNo. Item Specication Remarks

- 8 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposes5. Video resolutions (2D)5.1.

- 9 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposes5.3. HDMI Input(PC/DTV)No. Re