JVC 250 Manual do Utilizador

SERVICEMANUALModel 250 ProjectorPhone: (760) 929-5300Fax: (760) 929-54102310 Camino Vida RobleCarlsbad, California 92009

Chapter 2---System DescriptionModel 250 Service Manual 2-3Igniter AssemblyThe Igniter Assembly provides the high voltage pulse that lights the Arc Lam

Chapter 5---ElectronicsModel 250 Service Manual 5-45Figure 5-26 Video Amplifier PCB I/O Diagram

Chapter 5---Electronics5-46 Model 250 Service ManualFigure 5-27 Video Amplifier PCB I/O Diagram for the Video Processor PCB andCRTs.Video Amplifier P

Chapter 5---ElectronicsModel 250 Service Manual 5-47RGB_HEAT (neg.) - negative side of CRT heater voltage (ground level).ARC_GND - CRT ground back to

Chapter 5---Electronics5-48 Model 250 Service ManualThe Video Amplifier PCB detects all the necessary supply voltages (+80 V, +15V, and the +6.2 V) fo

Chapter 5---ElectronicsModel 250 Service Manual 5-495. Remove the green CRT by loosening the green CRT Holder Ring (seeFigure 5-29). Perform this ste

Chapter 5---Electronics5-50 Model 250 Service Manual12. Disconnect the three Focus cables that run from the CRT SocketConnectors to the Focus connecto

Chapter 5---ElectronicsModel 250 Service Manual 5-515.10 CRT/Yoke AssembliesCRT/Yoke Assemblies - Main Function! CRTs converts image signal to image

Chapter 5---Electronics5-52 Model 250 Service ManualImage - image light that passes through Relay Lens and focuses on photosensitivelayer on input sid

Chapter 5---ElectronicsModel 250 Service Manual 5-53CRT Mechanical FocusThe CRT Mechanical focus is factory-set and normally will not require addition

Chapter 5---Electronics5-54 Model 250 Service ManualFigure 5-29 CRT Mechanical Focus adjustments.CRT RotationThe CRT tilt adjustment aligns the CRT l

Chapter 2---System Description2-4 Model 250 Service Manual! Condensing Lenses (2) - The Primary Condensing Lens collects all thelight from the Light P

Chapter 5---ElectronicsModel 250 Service Manual 5-555. View the color for the CRT that requires rotation. Hide the other twocolors.6. In the Geometr

Chapter 5---Electronics5-56 Model 250 Service ManualCRT Electronic FocusThe Electronic Focus is factory-set and normally will not need to be adjustede

Chapter 5---ElectronicsModel 250 Service Manual 5-57CRT/Yoke Assemblies - Remove and ReplaceThree CRT/Yoke Assemblies are located in the CRT Assembly

Chapter 5---Electronics5-58 Model 250 Service ManualNOTE: For the Green CRT/Yoke Assembly only, it is best to performStep 10 with the CRT socket conn

Chapter 5---ElectronicsModel 250 Service Manual 5-59! YPbPr (Optional)! Quad Standard Decoder (Optional)! Quad Standard Decoder/Line Doubler (Optional

Chapter 5---Electronics5-60 Model 250 Service ManualRGBHV VIC - InputsR - red image from source input (0.7-1.0 Vpp).G - green image from source input

Chapter 5---ElectronicsModel 250 Service Manual 5-61Parts NeededRGBHV VIC p/n 102597To remove the RGBHV VIC:1. Power off the projector by IR Remote

Chapter 5---Electronics5-62 Model 250 Service ManualFigure 5-34 Graphics Enhancer Plus faceplate.Graphics Enhancer Plus VIC - InputsR - red image fro

Chapter 5---ElectronicsModel 250 Service Manual 5-63Graphics Enhancer Plus VIC - OperationThe RGBHV VIC receives the separate red, green, blue image i

Chapter 5---Electronics5-64 Model 250 Service Manual4-Input (Quad) RGBHV VIC4-Input (Quad) RGBHV VIC - Main Functions! Interface for four sets of Red,

Chapter 2---System DescriptionModel 250 Service Manual 2-5Relay Lens Assemblies (3)There are three Relay Lenses, one for each color. The Relay Lens fo

Chapter 5---ElectronicsModel 250 Service Manual 5-65IIC CLK - IIC clock lineIIC DATA - IIC data lineIIC SINT - IIC interrupt lineFigure 5-36 4-Input

Chapter 5---Electronics5-66 Model 250 Service Manual4-Input (Quad) RGBHV VIC - OutputsRED_VIC - red image to the Video Processor PCB (0.7-1.0 Vpp).GRN

Chapter 5---ElectronicsModel 250 Service Manual 5-67YPbPr VICThis decoder video input card (YPbPr_VIC) contains three BNC input connectorsthat can be

Chapter 5---Electronics5-68 Model 250 Service ManualFigure 5-38 YPbPr VIC faceplate.YPbPr VIC - InputsYPbPr InputsY - green image input with composit

Chapter 5---ElectronicsModel 250 Service Manual 5-69interface. An operator selects the VIC and input in the Channels Menu (seesection 4-6 in the User’

Chapter 5---Electronics5-70 Model 250 Service ManualQuad Standard Decoder VICThe Quad Standard Decoder VIC provides an interface for composite andS-Vi

Chapter 5---ElectronicsModel 250 Service Manual 5-71Quad Standard Decoder VIC - InputsComp - input for Composite image signal includes sync pulses (.0

Chapter 5---Electronics5-72 Model 250 Service Manualwhen the S-image input is selected. Only one LED will be illuminated at onetime. Neither LEDs will

Chapter 5---ElectronicsModel 250 Service Manual 5-73installed in the #2 or 3 VIC slot (it will not fit into the #1 slot), a blank face platemust be in

Chapter 5---Electronics5-74 Model 250 Service Manual5.12 Backplane PCBThe Backplane PCB is the spine of the Electronics Module. Every majorelectronic

Chapter 2---System Description2-6 Model 250 Service ManualPrinted Circuit Boards (PCB)The Model 250 Projector has eight main PCBs:! System Controller

Chapter 5---ElectronicsModel 250 Service Manual 5-75Figure 5-43 Backplane Diagram (middle section).The following is a list of pins that would be help

Chapter 5---Electronics5-76 Model 250 Service ManualFigure 5-44 Backplane Diagram (right side).

Chapter 5---ElectronicsModel 250 Service Manual 5-77

Chapter 6---Miscellaneous ItemsModel 250 Service Manual 6-16.0 Miscellaneous ItemsContents6.1 Projector Covers...

Chapter 6---Miscellaneous Items6-2 Model 250 Service Manual5. When the Latch Levers are inserted into the holding slots, lift the coveroff. Be carefu

Chapter 6---Miscellaneous ItemsModel 250 Service Manual 6-3Figure 6-1 Electronics Module hinge and locking mechanism.6.3 VentilationAdequate cooling

Chapter 6---Miscellaneous Items6-4 Model 250 Service Manual6.4 Air FiltersThere are three polyurethane air filters in the Model 250. Air filters shoul

Chapter 6---Miscellaneous ItemsModel 250 Service Manual 6-5The EMI Shield is a metal plate located in front of the Low Voltage PowerSupply and the Arc

Chapter 6---Miscellaneous Items6-6 Model 250 Service Manual

Chapter 7---TroubleshootingModel 250 Service Manual 7-17.0 TroubleshootingContents7.1 Safety...

Chapter 2---System DescriptionModel 250 Service Manual 2-7provides an interconnection interface for all the electronic components inthe projector.CRT/

Chapter 7---Troubleshooting7-2 Model 250 Service ManualLeft/Right Orientation: When referring to the left or right in this chapter, it iswith referenc

Chapter 7---TroubleshootingModel 250 Service Manual 7-3Figure 7-1 Rear Panel layoutControl Out - The Control Out terminal is another RS232 port simi

Chapter 7---Troubleshooting7-4 Model 250 Service ManualFigure 7-2 Dip Switch Block on System Controller PCB.Reset Switch - The Reset Switch resets t

Chapter 7---TroubleshootingModel 250 Service Manual 7-5Video Processor PCB LEDsFigure 7-4 Video Processor Test Points and LEDs.Video Processor - Test

Chapter 7---Troubleshooting7-6 Model 250 Service ManualSync - There are three sync test points: H sync for the horizontal sync pulse, Vsync for the ve

Chapter 7---TroubleshootingModel 250 Service Manual 7-7Raster Timing Generator PCB LEDsFigure 7-6 Raster Timing Generator LEDs.

Chapter 7---Troubleshooting7-8 Model 250 Service ManualRaster Timing Generator PCB LEDsBand LEDs The range horizontal scan frequencies accepted by the

Chapter 7---TroubleshootingModel 250 Service Manual 7-9Convergence Deflection PCB LEDFigure 7-7 Convergence Deflection PCB LED.The Convergence Deflec

Chapter 7---Troubleshooting7-10 Model 250 Service ManualVideo Amplifier PCB LEDFigure 7-8 Video Amplifier PCB LED.The VA_OK LED on the Video Amplifie

Chapter 7---TroubleshootingModel 250 Service Manual 7-11Backplane PCB LEDsFigure 7-9 Backplane PCB LEDs on right side (exposed side)of PCB.The Backpl

Chapter 2---System Description2-8 Model 250 Service Manualprojector. These air-borne particles can land on optics such as the ILA® and causelarge diff

Chapter 7---Troubleshooting7-12 Model 250 Service Manual7.3 DiagramsCommand ON TimingFigure 7-10 POWER ON and POWER OFF command timing diagram.When t

Chapter 7---TroubleshootingModel 250 Service Manual 7-13to the Arc Lamp Power Supply low. The Arc Lamp Power Supply delivers 170 Vto the Igniter, whic

Chapter 7---Troubleshooting7-14 Model 250 Service ManualImage PathFigure 7-11 RGB Image path from VIC to CRT.The image signals can be in the form of

Chapter 7---TroubleshootingModel 250 Service Manual 7-15Deflection PathFigure 7-12 CRT Deflection path from Raster Timing Generator PCB.The Raster Ti

Chapter 7---Troubleshooting7-16 Model 250 Service ManualThe Horizontal Vertical Deflection PCB outputs H_OUT_FLYBACK to the ScanReversal PCB. This is

Chapter 7---TroubleshootingModel 250 Service Manual 7-17Figure 7-13 CRT Deflection path between Horiz/Vert Deflection PCB,Convergence Deflection PCB

Chapter 7---Troubleshooting7-18 Model 250 Service ManualFigure 7-14 CRT Deflection path between the Scan Reversal PCB and CRT.

Chapter 7---TroubleshootingModel 250 Service Manual 7-19CRT ProtectionFigure 7-15 CRT Protection pathThe CRT Protection circuit is designed to protec

Chapter 7---Troubleshooting7-20 Model 250 Service ManualAmplifier PCB the /SWEEP_OK becomes the /VA_OK signal and checks thesupply voltages such as +1

Chapter 7---TroubleshootingModel 250 Service Manual 7-21Figure 7-16 CRT Protection path between the Scan Reversal PCB and CRT.

Chapter 2---System DescriptionModel 250 Service Manual 2-9

Chapter 7---Troubleshooting7-22 Model 250 Service Manual7.4 Error CodesFor certain errors that may occur in the Model 250 Projector the softwareprovid

Chapter 7---TroubleshootingModel 250 Service Manual 7-231.34“No mem available” Software error-no heap available for memoryallocation.2.1 “Invalid Sect

Chapter 7---Troubleshooting7-24 Model 250 Service Manual4.17 “VIC1 Board Not OK” /VIC_OK is High (BAD) on VIC Slot 1.4.18 “VIC 2 Board Not Ok” /VIC_OK

Chapter 7---TroubleshootingModel 250 Service Manual 7-257.5 Troubleshooting GuideTable 7-3 lists some common projector problems, what to check when pr

Chapter 7---Troubleshooting7-26 Model 250 Service ManualTroubleshooting on the Backplane PCBThe connectors on the Backplane PCB provide one of the mor

Chapter 7---TroubleshootingModel 250 Service Manual 7-27Figure 7-18 Backplane Diagram (middle section)The following is a list of pins that would be h

Chapter 7---Troubleshooting7-28 Model 250 Service ManualFigure 7-19 Backplane Diagram (right side)

Chapter 7---TroubleshootingModel 250 Service Manual 7-29

Chapter 8---Software and ProtocolModel 250 Service Manual 8-18.0 Software and ProtocolContents8.1 Software Updating...

Chapter 8---Software and Protocol8-2 Model 250 Service Manual! Cursor=Block & Blink! Terminal Font=Fixedsys 15! Translation=None,! Show Scroll Bar

Chapter 3---ElectricalModel 250 Service Manual 3-13.0 ElectricalContents3.1 Safety...

Chapter 8---Software and ProtocolModel 250 Service Manual 8-3 ***WARNING: IMPROPER USE MAY MAKE THIS SYSTEM UNBOOTABLE*** (This warning relates to the

Chapter 8---Software and Protocol8-4 Model 250 Service Manual Boot Manager Ver y.y.0 (Service Mode Startup)Copyright (c) 1994-1996 Hughes-JVCTechnolog

Chapter 8---Software and ProtocolModel 250 Service Manual 8-5The software update is complete. To restart the projector, type in the “sys” or“reboot” c

Chapter 8---Software and Protocol8-6 Model 250 Service ManualExporting1. Make sure the Windows TERMINAL program is configured forSOFTWARE FLOW CONTRO

Chapter 8---Software and ProtocolModel 250 Service Manual 8-7 . ENDA similar message is displayed on the projector screen : ==========================

Chapter 8---Software and Protocol8-8 Model 250 Service Manual | Import Configuration | | Start SEND TEXT Upload from | | Host on Serial

Chapter 8---Software and ProtocolModel 250 Service Manual 8-9 FINALLY, press ESC to exit the projector Import operation and return tothe Maintenance

Chapter 8---Software and Protocol8-10 Model 250 Service Manual8.3 Terminals and Communication ProtocolsTerminalsThe projector can be controlled by a

Chapter 8---Software and ProtocolModel 250 Service Manual 8-11Communications ProtocolSelect SETTINGS using the menu bar, then select COMMUNICATIONS. S

Chapter 8---Software and Protocol8-12 Model 250 Service ManualCenter, H & V(RGB)P POS 80 50Change channel Number +EnterChannel # +EnterChannel # +

Chapter 3---Electrical3-2 Model 250 Service ManualLeft/Right Orientation: When referring to the left or right in this chapter, it is withreference to

Chapter 8---Software and ProtocolModel 250 Service Manual 8-13*The Arrow keys are a sequence of Decimal or Hex numbers representing thesequence of Esc

Chapter 8---Software and Protocol8-14 Model 250 Service Manual

Chapter 9---Parts ListModel 250 Service Manual 9-19.0 Parts ListContents9.1 Replacement Parts List...

Chapter 9---Parts List9-2 Model 250 Service ManualDescription Part no.Power Cord, USA/Japan 104499Power Cord, Europe 103939Power Supply, Arc Lamp 1052

Chapter 9---Parts ListModel 250 Service Manual 9-39.2 SparesIt may be advisable to maintain a supply of spares for the projector to minimizedowntime.

Chapter 9---Parts List9-4 Model 250 Service Manual

GlossaryModel 250 Service Manual A-1Glossary of TermsAmorphous Without definite form; not crystallized.Arc Lamp The high intensity light source in the

GlossaryA-2 Model 250 Service ManualField One half of a complete video frame. Odd lines inone field and even lines in another make up oneframe.Frame O

GlossaryModel 250 Service Manual A-3Lumen A unit of measure of the flow, or rate of emission,of light measured with a Light Meter. Anordinary wax can

GlossaryA-4 Model 250 Service ManualS-Video An image signal that has the luminance (Y)information separated from chrominance (C)information.Saturated

Chapter 3---ElectricalModel 250 Service Manual 3-33.3 Power SuppliesAll Series 200 projectors including the Model 250 have three power supplies.These

GlossaryModel 250 Service Manual A-5alternating white and black horizontal lines thatcan be counted from the top of the picture to thebottom.Vertical

iiModel 250 Service ManualDECLARATION OF CONFORMITYPER ISO/IEC GUIDE 22 AND EN 45014Manufacturer:Hughes JVC2310 Camino Vida RobleCarlsbad, Ca 92009USA

Chapter 3---Electrical3-4 Model 250 Service ManualFigure 3-1 Low Voltage Power Supply I/O Diagram.LVPS - Operation:AC power is delivered to the Low V

Chapter 3---ElectricalModel 250 Service Manual 3-5! +5.1V for digital components! +6.2V for CRT filaments! ±15V for analog circuits! +80V supply used

Chapter 3---Electrical3-6 Model 250 Service ManualALPS - Inputs:AC input power: Directly from the AC Line Filter. The input range is from 220-240 VAC,

Chapter 3---ElectricalModel 250 Service Manual 3-7Figure 3-2 Arc Lamp Power Supply signals and voltages.ALPS - Operation:Three signals (/LAMP_ENA, /C

Chapter 3---Electrical3-8 Model 250 Service ManualThe Arc Lamp Power Supply sends the/LAMP_LIT signal back to the System Controller when the Arc Lamp

Chapter 3---ElectricalModel 250 Service Manual 3-92. Turn the AC Circuit Breaker to the OFF position and unplug the ACPower Cord.3. Remove the front c

Chapter 3---Electrical3-10 Model 250 Service ManualFigure 3-4 High Voltage Power Supply I/O signals.HVPS - InputsHVPS_SYNC - this signal is generated

Chapter 3---ElectricalModel 250 Service Manual 3-11RGB Anode Voltage - goes directly to each CRTRGB Focus Voltage - goes directly to each CRTArc Groun

Chapter 3---Electrical3-12 Model 250 Service ManualHVPS - Remove and ReplaceTools Needed#1 Pozi-drive Phillips-head screwdriver#2 Pozi-drive Phillips-

Chapter 3---ElectricalModel 250 Service Manual 3-13Table 3-1 HVPS - P45 I/O PinoutPIN # Description PIN # Description1 GND (+80V) 9 +15V2 GND (+15V) 1

Model 250 Projector Service Manual iiiTable of ContentsSafety Information...

Chapter 3---Electrical3-14 Model 250 Service Manual10. Disconnect P45 (“Control”) at upper left of HVPS.11. Disconnect and label the three Focus cable

Chapter 3---ElectricalModel 250 Service Manual 3-153.4 Igniter AssemblyThe Igniter Assembly consists of the Igniter and the Laser Power Supply. TheIgn

Chapter 3---Electrical3-16 Model 250 Service ManualFigure 3-7 Igniter Assembly.Igniter Assembly - Service AdjustmentsThere are no service adjustment

Chapter 3---ElectricalModel 250 Service Manual 3-175. Disconnect the orange cable attached to the input side of the IgniterTransformer using the 7/16

Chapter 4---OpticalModel 250 Service Manual 4-14.0 OpticalContents4.1 Arc Lamp...

Chapter 4---Optical4-2 Model 250 Service Manual4.1 Arc LampThe Arc Lamp is the beginning of the high intensity Light Path. It is locatedinside a housi

Chapter 4---OpticalModel 250 Service Manual 4-3 CAUTION! Fan disconnection is acceptable for a shortperiod of time only (preferably <20 minutes--m

Chapter 4---Optical4-4 Model 250 Service ManualHot spotoff-centerFigure 4-1 Arc Lamp “Hot Spot” (brightest area) is off-center vertically andhorizon

Chapter 4---OpticalModel 250 Service Manual 4-5Figure 4-3 Arc Lamp Assembly access door.Arc Lamp - Remove and ReplaceThe Arc Lamp Enclosure Assembly

Chapter 4---Optical4-6 Model 250 Service Manual5. Disconnect the orange Cathode cable from the Igniter, using the 7/16-inchwrench (see Figure 3-7).6.

ivModel 250 Service Manual6.5 IR Detectors... 6-46.6 EMI Sh

Chapter 4---OpticalModel 250 Service Manual 4-7Figure 4-4 Arc Lamp Assembly top view.4.2 Optical PathOptical Path - Main Function! Transports the Arc

Chapter 4---Optical4-8 Model 250 Service ManualFigure 4-5 Upper level view of Optical Path (top view).Optical Path - InputsArc Lamp high intensity w

Chapter 4---OpticalModel 250 Service Manual 4-9The Dichroic Beamsplitter Assembly separates the white light into its red, green,and blue components. E

Chapter 4---Optical4-10 Model 250 Service ManualFigure 4-6 Optical Path

Chapter 4---OpticalModel 250 Service Manual 4-11Figure 4-7 Optical PathOptical Path - Service AdjustmentsTools Needed3-mm Hex wrenchParts NeededNo se

Chapter 4---Optical4-12 Model 250 Service ManualPositioner adjusts the light beam coming out of the Light Pipe so that it projectssquarely onto the fa

Chapter 4---OpticalModel 250 Service Manual 4-134.3 ILA®ILA® Main functions! Modulates image light from the CRT onto the high intensity polarizedlight

Chapter 4---Optical4-14 Model 250 Service ManualILA® OperationThe ILA® plays a critical part in bringing the image to the screen. The ILA®receives the

Chapter 4---OpticalModel 250 Service Manual 4-15NOTE: Reset the ILA® bias after setting the Compensator and check G2Sensitivity Offset, and Threshold

Chapter 4---Optical4-16 Model 250 Service Manual CAUTION! To avoid damaging the connector,grasp the ILA® assembly itself, not the connector at the t

Chapter 1---IntroductionModel 250 Service Manual 1-11.0 IntroductionContents1.1 Safety...

Chapter 4---OpticalModel 250 Service Manual 4-1719. Retighten the two wing nuts and tighten the two hex nuts.20. Reset the ILA® biases to their previo

Chapter 4---Optical4-18 Model 250 Service Manual WARNING!!! Always wear an ANSI/ASTM 10,000volt rated safety glove when working around CRTs due to th

Chapter 4---OpticalModel 250 Service Manual 4-198. Loosen the two hex bolts (see Figure 4-10) on the ILA® assembly in frontof the Relay Lens.9. Slid

Chapter 4---Optical4-20 Model 250 Service Manual4.4 Relay LensesThe Relay Lens focuses the image light received from the CRT on thephotoconductive lay

Chapter 4---OpticalModel 250 Service Manual 4-213. Loosen (do not remove) the Lens holding screw at the right side (seeFigure 4-11) of the Projection

Chapter 5 Optical3-4-22 Model 100 Service Manual

Chapter 5---ElectronicsModel 250 Service Manual 5-15.0 ElectronicsContents5.1 Safety...

Chapter 5---Electronics5-2 Model 250 Service Manual WARNING!!! Never look directly at the Arc Lamp, thelighted Projection Lens or into the lamp housin

Chapter 5---ElectronicsModel 250 Service Manual 5-3Figure 5-2 Model 250 Electronics Module with PCBs (side view). CAUTION! It is very strongly rec

Chapter 5---Electronics5-4 Model 250 Service Manual! I/O control for VIC selection! Two RS-232 serial interface ports! Infrared (IR) remote control in

Chapter 1---Introduction1-2 Model 250 Service ManualWhen performing procedures that call for the projector’s power to be on, alwayswear high voltage g

Chapter 5---ElectronicsModel 250 Service Manual 5-5Figure 5-4 System Controller PCB I/O Diagram for Power Supplies and peripherals.

Chapter 5---Electronics5-6 Model 250 Service ManualFigure 5-5 System Controller PCB I/O Diagram for other PCBs.System Controller PCB - Inputs/LV_OK -

Chapter 5---ElectronicsModel 250 Service Manual 5-7280_CLK - Square wave signal from the Raster Timing Generator PCB, with50% duty cycle, synchronized

Chapter 5---Electronics5-8 Model 250 Service ManualRGB_THRES - red, green, or blue Threshold correction information to the VideoProcessor PCB.RGB_SENS

Chapter 5---ElectronicsModel 250 Service Manual 5-9Figure 5-6 Power On timing sequence.Normal Operation FunctionsDuring normal projector operation, t

Chapter 5---Electronics5-10 Model 250 Service ManualController PCB also enables the selected VICs through the IIC bus based on theVIC selected on the

Chapter 5---ElectronicsModel 250 Service Manual 5-115.4 Video Processor PCBVideo Processor PCB - Main Functions! Video signal input and multiplexing!

Chapter 5---Electronics5-12 Model 250 Service ManualFigure 5-7 Video Processor PCB I/O diagram for VICs and Power Supplies.

Chapter 5---ElectronicsModel 250 Service Manual 5-13Figure 5-8 Video Processor PCB I/O diagram for PCBs.Video Processor PCB - OutputsRGB_VID - red,

Chapter 5---Electronics5-14 Model 250 Service ManualRGB_G2 - red, green, or blue G2 voltage adjust control signal to the VideoAmplifier PCB.G1_BIAS -

Chapter 1---IntroductionModel 250 Service Manual 1-3SECAM Sequential couleur a memoire (sequencial color with memorySRB Scan Reversal BoardSYNC Synchr

Chapter 5---ElectronicsModel 250 Service Manual 5-15The G2 voltage accelerates the electrons that are emitted from the cathode of theCRT. The CRT fila

Chapter 5---Electronics5-16 Model 250 Service Manual6. Pull the black card extractor handles back to disconnect the VideoProcessor PCB connector and

Chapter 5---ElectronicsModel 250 Service Manual 5-17Figure 5-11 Raster Timing Generator for other PCBs.Raster Timing Generator PCB - InputsV_SYNC - i

Chapter 5---Electronics5-18 Model 250 Service ManualIIC_CLK - IIC clock line. Unidirectional clock line for control of synchronousdata transfer over t

Chapter 5---ElectronicsModel 250 Service Manual 5-19V_DRIVE - square wave negative going pulse to the Convergence DeflectionPCB, synchronized to the s

Chapter 5---Electronics5-20 Model 250 Service ManualVertical Deflection PCB to break the range of horizontal scan frequencies intofour smaller ranges

Chapter 5---ElectronicsModel 250 Service Manual 5-215.6 Horizontal Vertical Deflection PCBHorizontal Vertical Deflection PCB - Main Functions! Drive

Chapter 5---Electronics5-22 Model 250 Service ManualIIC_CLK - IIC clock lineIIC_DATA - IIC data lineIIC_SINT - IIC interrupt±15 V - input power from t

Chapter 5---ElectronicsModel 250 Service Manual 5-23Figure 5-14 Horizontal/Vertical I/O Diagram for Scan Reversal and VideoAmplifier PCBs.

Chapter 5---Electronics5-24 Model 250 Service ManualFigure 5-15 Physical layout of the Horizontal/Vertical PCB (note the Vertical SizeAdjustment Pots

Chapter 2---System DescriptionModel 250 Service Manual 2-12.0 System DescriptionContents2.1 Introduction...

Chapter 5---ElectronicsModel 250 Service Manual 5-25Horizontal Vertical Deflection PCB - OperationThe Horizontal Vertical Deflection PCB consists of a

Chapter 5---Electronics5-26 Model 250 Service Manualthe V_PARAB waveform. The output waveform V_RGB+ goes to the ScanReversal PCB and then drives the

Chapter 5---ElectronicsModel 250 Service Manual 5-27Figure 5-17 Red image needs vertical adjustment (increase).If Red is higher than Green at the top

Chapter 5---Electronics5-28 Model 250 Service ManualHorizontal Vertical Deflection PCB - Remove and ReplaceThe Horizontal/Vertical (H/V) Deflection PC

Chapter 5---ElectronicsModel 250 Service Manual 5-29! Convergence output amplifiers for all colors and both horizontal andvertical axes! Convergence e

Chapter 5---Electronics5-30 Model 250 Service ManualFigure 5-19 Convergence Deflection PCB I/O Diagram.

Chapter 5---ElectronicsModel 250 Service Manual 5-31Figure 5-20 Convergence Deflection PCB I/O Diagram.

Chapter 5---Electronics5-32 Model 250 Service ManualFigure 5-21 Physical layout of the Convergence/Deflection PCB.Convergence Deflection PCB - Opera

Chapter 5---ElectronicsModel 250 Service Manual 5-33temperature of the green ILA® increases, the bias is increased to maintain aconstant ILA® output.T

Chapter 5---Electronics5-34 Model 250 Service Manual8. Reinstall the Convergence/Deflection PCB by lowering the right side infirst until it clears t

Chapter 2---System Description2-2 Model 250 Service ManualFigure 2-1 Overview of the Model 250 projector showing major components2.2 Electrical Secti

Chapter 5---ElectronicsModel 250 Service Manual 5-35Y_RGB_YOKE (neg.) - bottom of red, green, and blue y-axis convergence yokes.RGB_LOCK (neg.) - inte

Chapter 5---Electronics5-36 Model 250 Service ManualFigure 5-22 Scan Reversal PCB I/O Diagram.

Chapter 5---ElectronicsModel 250 Service Manual 5-37Figure 5-23 Scan Reversal PCB I/O Diagram for Horizontal Vertical Deflection PCB.

Chapter 5---Electronics5-38 Model 250 Service ManualFigure 5-24 Scan Reversal PCB I/O Diagram for CRT Yokes.Scan Reversal PCB - OperationThe Scan Rev

Chapter 5---ElectronicsModel 250 Service Manual 5-39front/upright projection. This means the horizontal scan jumper is plugged intoJ100, the vertical

Chapter 5---Electronics5-40 Model 250 Service ManualScan Reversal PCB - Service AdjustmentsFigure 5-25 Physical layout of the Scan Reversal PCB.Horiz

Chapter 5---ElectronicsModel 250 Service Manual 5-4110. Recheck all Geometry and Convergence settings and readjust wherevernecessary.11. Replace the r

Chapter 5---Electronics5-42 Model 250 Service ManualTable 5-1 Projection orientation jumper settings.OrientationConvergence.P50 goes to:Vertical.P53

Chapter 5---ElectronicsModel 250 Service Manual 5-437. Power ON the projector and allow it to stabilize for a minimum of 15minutes. It is recommended

Chapter 5---Electronics5-44 Model 250 Service ManualVideo Amplifier PCB - InputsRGB_VIDEO - image pre-amp signals from the Video Processor PCB (about