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P/NO : MFL42466416Aug., 2009Printed in ChinaNorth/ Latin AmericaEurope/AfricaAsia/OceaniaCOLOR TVSERVICE MANUAL
CHASSIS : CW81BMODEL : 21SA1RL/RG/RLXMODEL :21SA1RL/RG/RLX-L4CAUTIONBEFORE SERVICING THE CHASSIS,READ THE SAFETY PRECAUTIONS IN THIS MANUAL.Internal Use Onlyhttp://aic.lgservice.comhttp://eic.lgservice.comhttp://biz.lgservice.comAdvertisement
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Summarization of Contents
Safety PrecautionsGeneral Safety ChecksEnsure all protective devices are functional and correctly installed.Electrical Hazard WarningsCheck for cabinet openings and hot chassis safety.X-Radiation and High Voltage PrecautionsSafety limits and precautions for X-radiation and high voltage.Design and Component SafetyWarning against design alteration and using correct replacement parts.Servicing Safety ProceduresObserve lead dress, check for overheating, and follow product safety notices.SpecificationsTechnical Specifications OverviewDetails power, channel range, frequencies, and chassis construction.AbbreviationsTechnical Terminology GlossaryGlossary of abbreviations used in the manual.Adjustment InstructionsScope, Notes, and AGC VoltageCovers application scope, general notes, and AGC voltage adjustment.Screen Voltage and Purity AdjustmentDetails screen voltage adjustment and initial purity adjustment steps.Convergence AdjustmentProcedures for static and dynamic convergence adjustment.White Balance and Focus Voltage AdjustmentProcedures for adjusting white balance and focus voltage.Sub-Brightness and Sub-Tint AdjustmentDetails sub-brightness and sub-tint adjustment procedures.Deflection Setting Data AdjustmentProcedures for deflection setting data adjustment.Adjustment Data TablesTables for IIC Bus and Auto Adjustment settings.EEPROM Option TableEEPROM Options - Opción 1 & 2EEPROM options related to CPT, DVD, GAME, and other features.EEPROM Options - Opción 3 & 4EEPROM options related to AUTO DE, LANGUAGE, and sound/AV modes.SVC Adjustment Data TableSVC 01 & 02 Register DataData for SVC 01 & 02 registers including bias, drive, and position adjustments.SVC 02 Extended & SVC 03 Register DataData for SVC 02 extended registers and SVC 03 registers.SVC 04 Register DataData for SVC 04 registers including DC REST, BS START/GAIN, and color settings.SVC 05, 06 & 07 Register DataData for SVC 05, 06, and 07 registers covering various TV functions.SVC 08 & 09 Register DataData for SVC 08 and 09 registers including video switch, PIP, and SAP settings.Trouble ShootingTV Functional OverviewOverview of TV functional blocks and their numbering.Tuner/IF and Video Processing TroubleshootingTroubleshooting guides for Tuner/IF and Video Processing sections.SMPS Section DetailsSMPS Primary Section DetailsDetails the primary section of the Switch Mode Power Supply (SMPS).SMPS Secondary Section DetailsDetails the secondary section of the Switch Mode Power Supply (SMPS).Vertical and Horizontal Section DiagramsVertical Section CircuitsDetails the vertical section including the IC and related components.Horizontal Section CircuitsDetails the horizontal section and related components.Audio and CPT Drive CircuitsSound Processing Path OverviewDetails the sound processing path from tuner to speaker.CPT Drive CircuitryDetails the CPT drive section, including RGB amplifier circuits.Exploded ViewComponent IdentificationReference numbers for components in the exploded view.Schematic DiagramCPT Board and Sound IC SchematicsSchematics for the CPT board and Sound IC.PIP Board and IC Version InformationSchematics for PIP board and IC version details.Printed Circuit Board LayoutsPCB Layout DiagramsLayouts for main, control, power, and optional CPT circuit boards.Block Diagram OverviewSystem Block DiagramOverview of key system blocks like SMPS, Sound Amp, CPT Drive, and Tuner.Table of Contents
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