JVC 250 - Manual

JVC 250

JVC 250 – Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.

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Table of Contents:

  • Page 2 – Model 250 Service Manual; DECLARATION OF CONFORMITY; is a registered trademark of Hughes-JVC Technology Corporation.
  • Page 3 – Table of Contents
  • Page 4 – Chapter 7 Troubleshooting
  • Page 5 – Contents
  • Page 6 – Used
  • Page 8 – System De s cription
  • Page 9 – Overview of the Model 250 projector showing major components; Electrical Section; Incoming Power Circuit
  • Page 10 – Igniter Assembly; Optical Section; Arc Lamp Module; This will result in a more uniform image on the screen
  • Page 11 – ILA
  • Page 12 – Front Projection Lens; Fixed Lens; Electronic Section; YPbPr VIC - Composite Video Decoding for YPbPr
  • Page 14 – s, but they are included in the; Miscellaneous Items; Projector Covers
  • Page 15 – and cause; EMI Shield; Relative location of CRTs, Relay Lenses, ILA
  • Page 17 – Before performing procedures in this chapter,; WARNING; When performing procedures in this chapter; CAUTION; It is very strongly recommended that setup
  • Page 18 – AC Power Cord
  • Page 19 – Supplies; Low Voltage Power Supply
  • Page 21 – LVPS - Service Adjustments
  • Page 22 – Run Voltage - 25 to 31 V to maintain the arc lamp operation.
  • Page 23 – Arc Lamp Power Supply signals and voltages.
  • Page 24 – Arc Lamp Power Supply connections.; ALPS - Service Adjustments; Tools Needed
  • Page 25 – NOTE
  • Page 26 – G1 Supply - goes to Video Amplifier PCB
  • Page 27 – HVPS - Service Adjustments
  • Page 28 – HVPS - Remove and Replace; Electronic
  • Page 29 – Description; Disconnect the three CRT Anode Cables.
  • Page 30 – Reinstall the High Voltage Power Supply in the reverse order.; Replace the HVPS cover.
  • Page 31 – Assembly; Generates 32 kV pulse to light Arc Lamp Power; Igniter Assembly - Inputs; +170 V - From the Arc Lamp Power Supply during Arc Lamp lighting.; Igniter Assembly - Outputs; 2 kV - to the Arc Lamp during Arc Lamp lighting.; Igniter Assembly - Operation
  • Page 32 – Igniter Assembly - Service Adjustments; Replace the Igniter and the Laser Power Supply as one unit.
  • Page 33 – Lift the Igniter Assembly out of projector.
  • Page 35 – Lamp; Arc Lamp - Service Adjustments
  • Page 36 – Fan disconnection is acceptable for a short
  • Page 37 – Arc Lamp “Hot Spot” (brightest area) is off-center vertically and
  • Page 38 – Arc Lamp Assembly access door.; Arc Lamp - Remove and Replace
  • Page 39 – Disconnect large blower fan connector.
  • Page 40 – Path; Optical Path - Main Function
  • Page 41 – Optical Path - Inputs; Arc Lamp high intensity white light; Optical Path - Outputs; Component RGB polarized light to the ILA; Optical Path - Operation
  • Page 43 – Optical Path
  • Page 44 – Optical Path - Service Adjustments
  • Page 45 – To adjust the XY Positioner:
  • Page 48 – If the green ILA
  • Page 51 – volt rated
  • Page 53 – Lenses; Projection Lens - Input
  • Page 54 – Projection Lens holding screw and removal notch.; Use the same procedure to install or remove fixed lenses. Also,; when changing from a zoom to a fixed lens, or vice versa, check the ILA
  • Page 57 – Never look directly at the Arc Lamp, the
  • Page 58 – Controller; System Controller PCB - Main Function; Provides IIC serial bus communication and control between PCBs.
  • Page 59 – I/O control for VIC selection
  • Page 61 – System Controller PCB I/O Diagram for other PCBs.; System Controller PCB - Inputs
  • Page 62 – ±15 V - from the Low Voltage Power Supply for all analog circuitry; System Controller PCB - Outputs
  • Page 63 – LENS_FOCUS - Signal to the focus motor of the Projector Lens.; System Controller PCB - Operation; Startup Functions
  • Page 64 – Power On timing sequence.
  • Page 65 – System Controller PCB - Remove and Replace
  • Page 66 – Video Processor PCB; Video Processor PCB - Main Functions
  • Page 67 – Video Processor PCB I/O diagram for VICs and Power Supplies.
  • Page 68 – Video Processor PCB I/O diagram for PCBs.; Video Processor PCB - Outputs
  • Page 69 – voltage adjust control signal to the Video; Video Processor PCB - Operation; . Gamma correction consists of degrees of black and white boost. The
  • Page 70 – Video Processor PCB - Remove and Replace
  • Page 71 – Raster Timing Generator PCB; Raster Timing Generator PCB - Main Functions
  • Page 72 – Raster Timing Generator for other PCBs.; Raster Timing Generator PCB - Inputs
  • Page 73 – Raster Timing Generator PCB - Outputs
  • Page 74 – Raster Timing Generator PCB - Operation
  • Page 75 – Raster Timing Generator PCB - Remove and Replace
  • Page 76 – Horizontal Vertical Deflection PCB; Horizontal Vertical Deflection PCB - Main Functions; Horizontal raster centering for all three colors; Horizontal Vertical Deflection PCB - Inputs
  • Page 78 – Horizontal/Vertical I/O Diagram for Scan Reversal and Video
  • Page 79 – Horizontal Vertical Deflection PCB - Outputs; Vertical Adjustment Pots
  • Page 80 – Horizontal Vertical Deflection PCB - Operation; The Horizontal Deflection Amplifier
  • Page 81 – Horizontal Vertical Deflection PCB - Service Adjustments; Vertical Size Adjustment
  • Page 82 – Red image needs vertical centering.
  • Page 83 – Horizontal Vertical Deflection PCB - Remove and Replace; Horizontal Vertical Deflection PCB p/n 105236; Convergence Deflection PCB; Convergence Deflection PCB - Main Functions; Height control
  • Page 84 – Convergence Deflection PCB - Inputs
  • Page 87 – Convergence Deflection PCB - Operation; Bias command in the Factory Adj. Menu. The commands are
  • Page 88 – Convergence Deflection PCB - Remove and Replace
  • Page 89 – It may be necessary to fit the top 2 fins of the heat sync over the; Scan Reversal PCB; Scan Reversal PCB - Main Functions; Reverses of scan in both horizontal and vertical axes; Scan Reversal PCB - Inputs; From Yokes
  • Page 90 – Scan Reversal PCB - Outputs; To Yokes
  • Page 93 – Scan Reversal PCB I/O Diagram for CRT Yokes.; Scan Reversal PCB - Operation
  • Page 94 – and G
  • Page 95 – Scan Reversal PCB - Service Adjustments
  • Page 96 – Replace the rear cover.; Do not attempt to switch jumpers while the
  • Page 97 – Orientation; The Model 250 Projector can not be
  • Page 98 – Scan Reversal PCB - Remove and Replace; Amplifier; Video Amplifier PCB - Main Functions
  • Page 99 – Video Amplifier PCB - Inputs; grid on CRTs from High Voltage Power Supply
  • Page 100 – Video Amplifier PCB I/O Diagram
  • Page 101 – Video Amplifier PCB I/O Diagram for the Video Processor PCB and; Video Amplifier PCB - Outputs
  • Page 102 – Video Amplifier PCB - Operation
  • Page 103 – Video Amplifier PCB - Remove and Replace
  • Page 104 – The connections at the rear of the CRT; It may be helpful to perform this step with a partner-one person to
  • Page 105 – Observe that each of the three Focus cables (large, red wires that; Reinstall in the reverse order from above.
  • Page 107 – CRT/Yoke Assemblies - Service Adjustments
  • Page 110 – The CRT Thumbscrew is used more as a handle to move the CRT
  • Page 112 – Handle the CRT/Yoke Assemblies with; The CRT Holder Ring should be only hand-tight. If it is not
  • Page 113 – For the Green CRT/Yoke Assembly only, it is best to perform
  • Page 114 – Standard RGBHV VIC; RGBHV VIC - Main Functions; Interface for Red, Green, and Blue image inputs
  • Page 115 – RGBHV VIC - Operation
  • Page 116 – Graphics Enhancer Plus RGBHV VIC; Grahics Enhancer Plus RGBHV VIC - Main Functions
  • Page 117 – Graphics Enhancer Plus VIC - Inputs
  • Page 118 – Graphics Enhancer Plus VIC - Operation
  • Page 120 – IIC CLK - IIC clock line
  • Page 122 – YPbPr VIC; YPbPr VIC - Main Functions
  • Page 123 – YPbPr Inputs; YPbPr VIC - Operation
  • Page 124 – YPbPr VIC - Service Adjustments
  • Page 125 – Quad Standard Decoder VIC; Quad Standard Decoder VIC - Main Functions
  • Page 126 – Quad Standard Decoder VIC - Inputs; Quad Standard Decoder VIC - Outputs
  • Page 127 – Quad Standard Decoder VIC - Service Adjustments; Quad Standard Decoder/Line Doubler VIC
  • Page 128 – Quad Standard Decoder/Line Doubler VIC faceplate with blank
  • Page 129 – Troubleshooting on the Backplane PCB
  • Page 133 – Items; Do not leave either cover in the tilted up
  • Page 134 – Module
  • Page 135 – Electronics Module hinge and locking mechanism.
  • Page 136 – Filters; EMI Shield with Low Voltage Power Supply and Arc Lamp Power
  • Page 137 – Assemblies and Mirrors
  • Page 139 – ! Before performing procedures in this chapter,; review the chapter on Safety at the beginning of this manual.; When performing troubleshooting
  • Page 140 – When referring to the left or right in this chapter, it is; Backpanel LEDs
  • Page 141 – Figure; Rear Panel layout
  • Page 142 – Dip Switch Block on System Controller PCB.
  • Page 143 – Video Processor PCB LEDs; Video Processor Test Points and LEDs; Video Processor - Test Points
  • Page 144 – Ground - The Gnd test point is for reference ground.; Video Processor - LEDs
  • Page 145 – Raster Timing Generator PCB LEDs; Raster Timing Generator LEDs.
  • Page 146 – Band LEDs
  • Page 147 – Convergence Deflection PCB LED; Convergence Deflection PCB LED.
  • Page 148 – Video Amplifier PCB LED; Video Amplifier PCB LED.
  • Page 149 – Backplane PCB LEDs; Backplane PCB LEDs on right side (exposed side)of PCB
  • Page 150 – Command ON Timing; POWER ON and POWER OFF command timing diagram.
  • Page 152 – Image Path; RGB Image path from VIC to CRT.
  • Page 153 – Deflection Path; CRT Deflection path from Raster Timing Generator PCB.
  • Page 155 – CRT Deflection path between Horiz/Vert Deflection PCB,
  • Page 156 – CRT Deflection path between the Scan Reversal PCB and CRT.
  • Page 157 – CRT Protection; CRT Protection path
  • Page 158 – Yoke Connector Detection
  • Page 159 – CRT Protection path between the Scan Reversal PCB and CRT.
  • Page 160 – Codes
  • Page 162 – Copy the three lines that appear on the screen.
  • Page 163 – Guide; Problem
  • Page 168 – Software and Protocol; To perform software upgrade:
  • Page 170 – If normal software starts, see Step 9 to reenter Boot Manager.)
  • Page 171 – 2A. To update the System Software from the Boot Manager prompt:
  • Page 172 – Configuration; Export/Import can be performed on either Port A or Port B. The Port; If you use 19200 Baud, your computer must; Laptop computer users must disable Advance
  • Page 173 – Exporting; Select OK with mouse or press Enter key (dialog will be removed); ENTER; key to start export download. NOTE: Some VT100
  • Page 174 – A similar message is displayed on the projector screen :; Esc; to exit the projector Export operation and return to the; Importing; Press ENTER to continue with the Import.
  • Page 175 – At successful end, TERMINAL will remove the bottom line.
  • Page 176 – Model 250 Menu will display:; Windows TERMINAL: FIRST press STOP to end the Host Upload; operation and return; Null Modem Adapter
  • Page 177 – Terminals and Communication Protocols; Terminals; From Windows Program Manager, select TERMINAL then SETTINGS.; Terminal Preferences; Terminal preference settings
  • Page 178 – Communications Protocol
  • Page 182 – List
  • Page 186 – Glossary of Terms
  • Page 187 – Reverses the image projection for front or rear
  • Page 188 – An undesirable electrical interference of a signal.
  • Page 189 – One horizontal line in a graphics frame.
  • Page 190 – Reverses the image vertically for use with
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SERVICE

MANUAL

Model 250 Projector

Phone: (760) 929-5300

Fax: (760) 929-5410

2310 Camino Vida Roble
Carlsbad, California 92009

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Summary

Page 2 - Model 250 Service Manual; DECLARATION OF CONFORMITY; is a registered trademark of Hughes-JVC Technology Corporation.

ii Model 250 Service Manual DECLARATION OF CONFORMITY PER ISO/IEC GUIDE 22 AND EN 45014 Manufacturer: Hughes JVC2310 Camino Vida RobleCarlsbad, Ca 92009USA Hughes-JVC declares that this product conforms to the following ProductSpecifications (Directive/Standard): Safety: EN 60950 IEC 950 (1992) EMC:...

Page 3 - Table of Contents

Model 250 Projector Service Manual iii Table of Contents Safety Information .................................................................................... v Chapter 1 Introduction 1.1 Safety...................................................................................................... 1...

Page 4 - Chapter 7 Troubleshooting

iv Model 250 Service Manual 6.5 IR Detectors............................................................................................ 6-46.6 EMI Shield ............................................................................................. 6-46.7 Cleaning Lenses, ILA ® Assemblies, and Mirro...

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