Mitsubishi Electronics WS-48513 manual LPF & Summing Amps, Low Pass Filter and Summing Amplifiers

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Figure 7-3: Low Pass Filter and Summing Amplifiers

LPF & Summing Amps

Figure 7-3illustrates the LPF and Summing Ampli- fiers. The circuitry consists of three ICs, IC8E00, IC8E01 and IC8E02. Each correction signal from IC8D00 goes through two stages of amplification:

1)The first stage is part of the LPF.

2)The second stage is the Summing Amplifier.

Green horizontal and vertical correction signals are added to the Red and Blue Summing Amplifier in- puts.

7-3

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Contents V23 Page 2003 Page Power Supply Table of Contents Introduction ... New TechnologiesDisassembly and Service Alignment ProceduresConvergence Circuitry Troubleshooting TipsVideo/Color Circuitry Sync, Deflection and High VoltageIntroduction FeaturesFeatures NetCommand Icons NetCommandButton Function Format Memory Card ReaderCompatibility PerfectColorDigital Visual Interface DVI MonitorLinkAcronyms Transition Minimized Differential Signaling TmdsDisplay Data Channel DDC Single-Link TmdsHot Plug Detect HPD High-bandwidth Digital Content Protection HdcpDVI Input Block Diagram MonitorLink DVI ConnectorV23 Chassis DVI Input Block Diagram Service Menu Access Codes Lightbox Chapter Disassembly and ServiceMain Chassis Removal DM ReplacementMain Chassis Removal PCB Locations PCB & Major Component Locations Convergence IC ReplacementV23+++ Composite Cabinet Back V23+++ Cabinet Front DisassemblyInitial Setup Chapter Alignment ProceduresOption Menu Initial Setup Main Menu Default Settings Activating the Circuit Adjustment Mode Circuit Adjustment ModeSaving Adjustment Data Selection of adjustment Functions Adjustment ItemsTerminating the Circuit Adjustment Mode NEW FEATURE… Service Mode ResetActivating the HD mode when no HD signal is available Convergence Adjustment ModeConvergence Mode Functions Alignment Data Storage Locations Fine Convergence ModeLow Energy Standby Regulator Chapter Power SupplyLow Energy Mode Low Energy Mode ActivationRegulation User Setup MenuLow Energy Power Distribution Start-up Standard Standby SupplyStandby Power Distribution Time Shift Recording Power SuppliesStandard Standby Supplies Time Shift Supply Power Distribution Switched Supplies Regulator Power Distributions TroubleshootingFlashes-Stops-Flashes-Stops-etc If the LED does not flash Page Basic µPC Requirements Chapter Control CircuitryReset Circuitry Input Command Circuitry Page ΜPC Parallel Inputs Serial Data LinesAC-OFF Input RAY Protect Short DetectBWC Band Width Control Parallel OutputsFlash Circuit Chapter Video/Color Circuitry PCB-TERMINAL Video Path PCB-SIGNAL Video Path CRT Drive & Protect Circuitry Digital Signal Path Monitor Out Circuit Chapter Sync, Deflection & High Voltage VGA Sync Signal PathPage Page Horizontal Deflection Vertical DeflectionHorizontal Deflection DC Supply Circuitry Deflection Loss Detection HV & HV Regulation Ray Protect Page Chapter Convergence Circuitry Convergence Circuitry Overall Block DiagramConvergence Waveform Generator & D/A Converter Waveform Generator & D/A ConverterLow Pass Filter and Summing Amplifiers LPF & Summing AmpsConvergence Output Circuitry Convergence Output CircuitryDTV DVI VGA Chapter Sound CircuitryOverall Sound Circuitry Block Diagram Digital Audio Output Overall Sound Signal PathPage Using The Front Panel LED Chapter Troubleshooting TipsReading the Error Codes DM Module Check NetCommandTM Control ProblemsCRT Phosphor Protection