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JVC 250 service manual Secam

Models: 250

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	Chapter 1---Introduction
SECAM	Sequential couleur a memoire (sequencial
	color with memory
SRB	Scan Reversal Board
SYNC	Synchronization
TTL	Transistor-Transistor Logic
UL	Underwriter Laboratories
UV	Ultraviolet
VAB	Video Amplifier Board
VCO	Voltage Controlled Oscillator
VIC	Video Input Card
VIN	Video Input
VPB	Video Processor Board
VSYNC	Vertical Sync
VTR	Video Tape Recorder
Y	Luminance

Model 250 Service Manual

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JVC 250 service manual Secam

Contents

Model 250 Projector Manufacturer Hughes JVC Declaration of ConformityTable of Contents Software and Protocol TroubleshootingParts Safety ContentsUpdates Acronyms Used Secam Introduction ContentsPower Supplies Incoming Power CircuitElectrical Section Optical Path Igniter AssemblyOptical Section Arc Lamp ModuleCRTs ILA s Image Light AmplifierInput Cards VICs Electronic SectionRelay Lens Assemblies Front Projection LensPrinted Circuit Boards PCB Miscellaneous Items EMI Shield System Description Electrical SafetyAC EMI Filter Incoming Power CircuitAC Power Cord AC Circuit BreakerLvps Inputs Power SuppliesLow Voltage Power Supply Lvps Lvps Main FunctionsLvps Operation 1Low Voltage Power Supply I/O DiagramAlps Main Functions Arc Lamp Power Supply AlpsLvps Service Adjustments Lvps Remove and ReplaceAlps Outputs Alps InputsAlps Operation 2Arc Lamp Power Supply signals and voltagesAlps Remove and Replace Alps Service AdjustmentsHvps Main Functions High Voltage Power Supply HvpsHvps Outputs Hvps InputsHvps Operation Hvps Service AdjustmentsHvps Remove and Replace 5High Voltage Power Supply coverPIN # Electrical Igniter Assembly Operation Igniter AssemblyIgniter Assembly Inputs Igniter Assembly OutputsIgniter Assembly Remove and Replace Igniter Assembly Service AdjustmentsElectrical Optical Arc Lamp Inputs Arc Lamp Service AdjustmentsArc Lamp Arc Lamp Main FunctionsOptical 2Arc Lamp alignment fixture Arc Lamp Remove and Replace 3Arc Lamp Assembly access doorOptical Optical Path Main Function Optical PathOptical Path Outputs Optical Path InputsOptical Path Operation Optical 6Optical Path 7Optical Path Optical Path Service Adjustments8XY Positioner adjust holes ILA Outputs ILAILA Main functions ILA InputsILA Operation ILA Service AdjustmentsOptical Optical Optical Optical ILA Remove and Replace Projection Lens Relay LensesOptical Optical Electronics 1Model 250 System Block Diagram System Controller PCB Main Function System Controller PCBElectronics Electronics System Controller PCB Inputs 5System Controller PCB I/O Diagram for other PCBsSystem Controller PCB Outputs System Controller PCB Operation Electronics System Controller PCB Remove and Replace Video Processor PCB Main Functions Video Processor PCBVideo Processor PCB Inputs 7Video Processor PCB I/O diagram for VICs and Power Supplies Video Processor PCB Outputs 8Video Processor PCB I/O diagram for PCBsVideo Processor PCB Operation Video Processor PCB Remove and Replace 9Video Processor PCB LEDsRaster Timing Generator PCB Main Functions Raster Timing Generator PCBRaster Timing Generator PCB Inputs 11Raster Timing Generator for other PCBsRaster Timing Generator PCB Outputs Raster Timing Generator PCB Operation Raster Timing Generator PCB Remove and Replace 12LEDs on the Raster Timing Generator PCBHorizontal Vertical Deflection PCB Main Functions Horizontal Vertical Deflection PCBHorizontal Vertical Deflection PCB Inputs 13Horizontal/Vertical I/O Diagram Electronics Horizontal Vertical Deflection PCB Outputs Horizontal Vertical Deflection PCB Operation 16Red image needs vertical adjustment decrease Horizontal Vertical Deflection PCB Service AdjustmentsElectronics Horizontal Vertical Deflection PCB Remove and Replace Convergence Deflection PCBConvergence Deflection PCB Main Functions Convergence Deflection PCB Outputs Convergence Deflection PCB Inputs19Convergence Deflection PCB I/O Diagram 20Convergence Deflection PCB I/O Diagram Convergence Deflection PCB Operation 21Physical layout of the Convergence/Deflection PCBConvergence Deflection PCB Remove and Replace Scan Reversal PCB Main Functions Scan Reversal PCBScan Reversal PCB Inputs Scan Reversal PCB Outputs 22Scan Reversal PCB I/O Diagram Electronics Scan Reversal PCB Operation 24Scan Reversal PCB I/O Diagram for CRT YokesElectronics Scan Reversal PCB Service Adjustments Electronics 1Projection orientation jumper settings Scan Reversal PCB Remove and Replace Video Amplifier PCBVideo Amplifier PCB Main Functions Video Amplifier PCB Inputs 26Video Amplifier PCB I/O Diagram Video Amplifier PCB Outputs Video Amplifier PCB Operation Video Amplifier PCB Remove and Replace Electronics 28Video Amplifier PCB showing CRT Socket Connectors CRT/Yoke Assemblies Output 10 CRT/Yoke AssembliesCRT/Yoke Assemblies Main Function CRT/Yoke Assemblies InputsCRT/Yoke Assemblies Operation CRT/Yoke Assemblies Service AdjustmentsElectronics Electronics Electronics 30View of CRTs, Relay lenses and ILA Assemblies CRT/Yoke Assemblies Remove and Replace Video Input Cards VICs Rgbhv VIC Main Functions Standard Rgbhv VICRgbhv VIC Operation Rgbhv VIC Service AdjustmentsRgbhv VIC Inputs Rgbhv VIC OutputsGrahics Enhancer Plus Rgbhv VIC Main Functions Graphics Enhancer Plus Rgbhv VICGraphics Enhancer Plus VIC Outputs Graphics Enhancer Plus VIC InputsGraphics Enhancer Plus VIC Operation Graphics Enhancer Plus VIC Service AdjustmentsGraphics Enhancer Plus VIC Remove and Replace Input Quad Rgbhv VIC Main Functions Input Quad Rgbhv VICInput Quad Rgbhv VIC Inputs 364-Input Quad Rgbhv VIC Input Quad Rgbhv VIC Remove and Replace Input Quad Rgbhv VIC Service AdjustmentsInput Quad Rgbhv VIC Outputs Input Quad Rgbhv VIC OperationYPbPr VIC Main Functions YPbPr VICYPbPr VIC Outputs YPbPr VIC InputsYPbPr VIC Operation YPbPr VIC Remove and Replace YPbPr VIC Service AdjustmentsQuad Standard Decoder VIC Main Functions Quad Standard Decoder VICQuad Standard Decoder VIC Outputs Quad Standard Decoder VIC InputsQuad Standard Decoder VIC Operation Quad Standard Decoder/Line Doubler VIC Quad Standard Decoder VIC Service AdjustmentsQuad Standard Decoder VIC Remove and Replace Electronics Backplane PCB 42Backplane Diagram left sideSee Figure 44Backplane Diagram right side Electronics Projector Covers Miscellaneous ItemsElectronics Module Tilt-up 1Electronics Module hinge and locking mechanism VentilationIR Detectors Air FiltersEMI Filter Cleaning Lenses, ILA Assemblies and Mirrors Miscellaneous Items Troubleshooting Backpanel LEDs LEDsTroubleshooting Troubleshooting Video Processor Test Points Video Processor PCB LEDsVideo Processor LEDs 6Raster Timing Generator LEDs Raster Timing Generator PCB LEDsRaster Timing Generator PCB LEDs Convergence Deflection PCB LED Video Amplifier PCB LED Backplane PCB LEDs Command on Timing DiagramsTroubleshooting Image Path Deflection Path Troubleshooting Troubleshooting 14CRT Deflection path between the Scan Reversal PCB and CRT CRT Protection Troubleshooting 16CRT Protection path between the Scan Reversal PCB and CRT IIC Handler Error CodesTroubleshooting Troubleshooting Problem Check Possible Solution Section Troubleshooting Guide17Backplane Diagram left side Troubleshooting on the Backplane PCBLamplit Lampok Lampena Coveron GND 19Backplane Diagram right side Troubleshooting Software Updating Software and ProtocolCommand Software and Protocol Updating Importing/Exporting ConfigurationWindows Terminal Transfers + Receive Text File ExportingImporting Similar message is displayed on the projector screenStop, Pause, % complete bar, Sending EXPORT1.TXT Null Modem Adapter Data Transfer Error Example Model 250 Menu will displayTerminals Terminals and Communication ProtocolsTerminal Preferences Communications Protocol POS RGB Software and Protocol Software and Protocol Description Replacement Parts ListDescription Description Quantity SparesParts List Aspect Ratio Cross-member AssemblyAmorphous Arc LampHorizontal Scan Laser Power SupplyField FrameNoise ResolutionLumen LuminanceScan Vertical ResolutionVideo Saturated ColorFrequency Vertical Scan FrequencyVertical Scan Vertical Synchronization