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Hughes JVC 220 Service Manual

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SERVICE
MANUAL
Model 220 Projector

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Summary of Contents for Hughes JVC 220

  • Page 1 SERVICE MANUAL Model 220 Projector...

  • Page 2: Declaration Of Conformity

    This manual was produced by Hughes-JVC Technology Corporation and may be revised without prior notice. No part of this manual may be reproduced in any form without the express written permission of Hughes-JVC Technology Corporation. ® is a registered trademark of Hughes-JVC Technology Corporation. Model 220 Service Manual...

  • Page 3: Table Of Contents

    4.13 Video Amplifier PCB .................. 4-15 4.14 Scan Reversal Board ................4-18 4.15 CRT/Yoke Assembly ................. 4-18 ® 4.16 ILA Assembly ..................4-20 4.17 Relay Lens ....................4-21 4.18 Projection Lens..................4-22 4.19 Prism Assembly..................4-23 Chapter 5 Troubleshooting Model 220 Service Manual...
  • Page 4 PCB Status LEDs ....................5-1 Error Codes ....................5-4 Troubleshooting Guide..................5-6 Chapter 6 Parts List ................6-1 Appendix A Import/Export ........... Appendix B Glossary ................B-1 Model 220 Service Manual...

  • Page 5: Safety Information

    Warns user of a potential safety hazard or potential light hazard from ultraviolet, infrared or bright light that could cause severe eye injury or a situation that could result in damage to the equipment if improperly used. Model 220 Service Manual...

  • Page 6: Heat Safeguards

    Blocking air intake or exhaust ports can lead to projector overheating. Do not enclose the unit in a restricted space (refer to the physical access and thermal clearance illustration guidelines). Model 220 Service Manual...

  • Page 7: Light Safeguards

    When replacement is needed, the arc lamp must be replaced as an entire module, as shown in this Model 220 Service Manual. Do not open the lamp housing or attempt to replace the Arc Lamp inside its module! Do not touch the Arc Lamp, or any connections, when the lamp is ignited or is arcing.
  • Page 8 Certain components of the projector contain fluid. If any fluid from the projector contacts the skin, wash off with soap and water. If any fluid from the projector splashes into the eyes, rinse with cool running water. viii Model 220 Service Manual...
  • Page 9 Do not attempt to retrieve any object or insert metal objects such as wire and screwdrivers inside the unit. If an object falls inside the projector, immediately unplug the projector and call a Hughes-JVC certified technician to remove object. Model 220 Service Manual...
  • Page 10 Safety Information Model 220 Service Manual...

  • Page 11: Chapter 1 Introduction

    Chapter 1---Introduction 1.0 Introduction This Service Manual is designed to be used with the Model 220 User’s Guide. This service manual provides information on the: — Projector functional description; — Service adjustments, removal and replacement of subassemblies; and — Troubleshooting.

  • Page 12: Acronyms Used In This Manual

    HVPS High Voltage Power Supply Inter-Integrated Circuit ® Image Light Amplifier Input/Output Infrared Kilohertz Light Emitting Diode LVPS Low Voltage Power Supply NTSC National Television Standards Committee Phase Alternating Line Printed Circuit Board Phase Lock Loop Model 220 Service Manual...
  • Page 13 Sequential couleur a memoire (sequencial color with memory Scan Reversal Board SYNC Synchronization Transistor-Transistor Logic Underwriter Laboratories Ultraviolet Video Amplifier Board Voltage Controlled Oscillator Video Input Card Video Input Video Processor Board VSYNC Vertical Sync Video Tape Recorder Luminance/Chrominance Model 220 Service Manual...
  • Page 14 Chapter 1---Introduction Model 220 Service Manual...

  • Page 15: Introduction

    2.3.11 Backplane PCB............2-60 2.4 Image Light Amplifier Technology ........... 2-61 2.1 Introduction The assemblies and components in the Model 220 projector are contained mainly in the five sections below: • The Optics Assembly Section is located at the front area of the projector.

  • Page 16: Optical System

    Video Amplifier Board. 2.2 Optical System Introduction: The Model 220 Optics Assembly divides white light from the Arc Lamp into its three color components, Red, Green and Blue. This light is then modulated with the image signal to form three single color images.
  • Page 17 (fully polarized light resulting in maximum brightness on the screen). Image Mirror: The Image Mirrors direct the blue and red images toward the Combining Prism. Model 220 Service Manual...

  • Page 18: Arc Lamp Light Path

    Xenon Arc Lamp/Condensing Lens: High pressure, ionized xenon gas supports a high-current electrical arc to produce the intense, white light used in the Model 220 projector. First Condensing Lens (Asphere): The high intensity light output from the Xenon Arc Lamp is picked up by the First Condensing...
  • Page 19 ILA Assembly. Each of these three light beams independently combine with the ® image in their own (Red, Green or Blue) color systems at the ILA assemblies as described in Section 2.2.1, Image Path. Model 220 Service Manual...
  • Page 20 Chapter 2---System Description Figure 2-1. Optical System Block Diagram Model 220 Service Manual...

  • Page 21: Electronics System

    Chapter 2---System Description 2.3 Electronics System 2.3.1 General Description The Model 220 Electronics System includes nine printed circuit assemblies. They provide all the controlling voltages and signals to adjust and correct picture settings, geometry, convergence, and shading (see Chapter 4 of the User’s Guide). The Electronics...
  • Page 22 Chapter 2---System Description 2.3.2 Power Supplies The Model 220 includes three power supply assemblies. • Low Voltage Power Supply • Arc Lamp Power Supply • High Voltage Power Supply Low Voltage Power Supply (LVPS) LV Ret /LV_ENA /LV_OK To P8 on...
  • Page 23 Provides steady state power to maintain the lamp ON. Inputs: The Arc Lamp Power Supply receives AC input power directly from the power source. The input range is from 100-240 VAC, at 50 or 60 Hz. /LAMP_ENA: From System Controller. Turns on the ALPS. Model 220 Service Manual...
  • Page 24 The High Voltage Power Supply (HVPS) is located on top of the LVPS on the right side of projector ( as viewed from rear). This supply provides the anode, focus, and screen voltages required for the three CRTs in the Model 220 projector. The following functions are provided by HVPS: •...
  • Page 25 Input refers to an input to the HVPS. Output refers to an output from the HVPS. In each case the signals direction is noted. Table 2-1. High Voltage Power Supply I/O signals Model 220 Service Manual 2-11...

  • Page 26: Video Processor Pcb

    LOW VOLTAGE POWER SUPPLY INPUTS DESCRIPTION + 15V + 15 V for use by the HVPS + 80V + 80 V for use by the HVPS - 15V - 15V for use by the HVPS 2-12 Model 220 Service Manual...
  • Page 27 The RGB Video Input Card (RGB_VIC) is located on the back side of the projector. It has five BNC input connectors. It provides the RGB and sync interface for the Model 220 projector. The following functions are provided by the RGB VIC: •...
  • Page 28 Table 2-2. Standard RGB VIC IIC communication Bits Information Description /SEL_CH Select line for the RGB_VIC. Low = Selected RGB_VIC. VIC_ID VIC identification lines. 0000 for RGB_VIC. VIC_MODEL Revision of the RGB_VIC. /VIC_OK RGB_VIC status line. Low = operational RGB_VIC. 2-14 Model 220 Service Manual...
  • Page 29 IIC data line. Bidirectional serial line for synchronous data transfer between system control board and the RGB_VIC. OUTPUTS DESCRIPTION /IIC_INT IIC interrupt line. RGB_VIC does not initiate an interrupt. LOW VOLTAGE POWER SUPPLY INPUTS DESCRIPTION +5.1 V +5.1 V supply for use by RGB_VIC. Model 220 Service Manual 2-15...
  • Page 30 VER_CH4 IIC_CLK /SEL_VIC IIC_DATA IIC_INT +5.1Vstby +5.1V +15V -15V Figure 2-7. Quad Input RGB VIC The same functions performed by the Standard RGBHV VIC are performed by the Quad Input RGB VIC. The description of 2-16 Model 220 Service Manual...
  • Page 31 This VIC accepts two types of video signals, color components (YPbPr) and RGB signals. In either case the output of this VIC is RGB type signals. If the inputs are color components they will be converted to RGB type signals. Model 220 Service Manual 2-17...
  • Page 32 YPbPr_VIC. The I/O descriptions are arranged by the source/destination of the signal. The format used is such that the assembly communicated with is used as the primary heading of each group of signals. Those signals are 2-18 Model 220 Service Manual...
  • Page 33 INPUTS DESCRIPTION +5.1 V +5.1 V supply for use by YPbPr_VIC. +15 V + 15 V supply for use by YPbPr_VIC. -15 V -15 V supply for use by YPbPr_VIC. Interlocks and protection Inputs: None Model 220 Service Manual 2-19...
  • Page 34 Figure 2-9. Quad Standard Decoder I/O Diagram. LED Indication There are two LEDs on this VIC. The LED on the right side of the board glows when Composite Video is selected and the LED on 2-20 Model 220 Service Manual...
  • Page 35 VIC is accomplished through the IIC control bus which provides the /SEL_VIC signal. Table 2-6. Quad Standard Decoder VIC IIC Interface Information Description SOURCE Selects input source (Composite Video or S- Video) STANDARD Selects signal standard (AUTO/NTSC/PAL/SECAM/4.43NTSC) Model 220 Service Manual 2-21...
  • Page 36 IIC clock line. Unidirectional clock line for control of synchronous data transfer over the IIC bus interface. IIC_DATA IIC data line. Bidirectional serial line for synchronous data transfer between System Control Board and the VIC. 2-22 Model 220 Service Manual...
  • Page 37 Sensitivity and Threshold signal input and control • Automatic limiting for Contrast, G2, and internal video The Video Processor I/O diagram and the list of inputs and outputs provide information to allow the technician to perform module-level troubleshooting. Model 220 Service Manual 2-23...
  • Page 38 (I = Input to the VPB, O = Output from the VPB): Table 2-8. Video Processor IIC communication Information Description RED_CONT Red Contrast level GRN_CONT Green Contrast level BLU_CONT Blue Contrast level 2-24 Model 220 Service Manual...
  • Page 39 Red signal of on-screen menu and/or internal test pattern GRN_OVER Similar to RED_OVER BLU_OVER Similar to RED_OVER OVERLAY Overlay control signal RED_SENS Sensitivity correction information for red. Real time data at 0 volt to 1 volt. GRN_SENS Similar to RED_SENS Model 220 Service Manual 2-25...
  • Page 40 Green sync signal to RTG board GRN_INPUT Green video signal to RTG board VIDEO AMPLIFIER INPUT DESCRIPTION RED_BEAM Voltage signal proportional to cathode current averaged over several horizontal lines in the red CRT. Voltage level is + mV/µA 2-26 Model 220 Service Manual...
  • Page 41 Similar to RED_VIC #1 H_VIC #1 Horizontal sync signal input from video input card #1 H_VIC #2 Similar to H_VIC #1 H_VIC #3 Similar to H_VIC #1 V_VIC #1 Vertical sync signal input from video input card #1 Model 220 Service Manual 2-27...
  • Page 42 CRT interface for focus, heater voltage and ARC ground The Video Amplifier Board I/O diagram (Figure 2-11) and the list of Inputs and Outputs (Table 2-10) provide information for the technician to perform module level troubleshooting. 2-28 Model 220 Service Manual...
  • Page 43 To BLU BLU_GRID2 BLU_HEAT+ From HVDB 19 /SWEEP_OK BLU_HEAT- ARC_GND + 8OV From + 15V /VA_OK To VPB LVPS + 6.2V J84-1, -15V ARC_GND HVPS J86-1, J88-1 Figure 2-11 . Video Amplifier PCB, Block Diagram. Model 220 Service Manual 2-29...
  • Page 44 VAB status line. Low = good VAB. High = Bad VAB (This signal is called /HV_ENABLE at the HVPS). RED_BEAM Cathode beam current lines. about 1 volt per 100 UA GRN_BEAM BLU_BEAM HIGH VOLTAGE POWER SUPPLY 2-30 Model 220 Service Manual...
  • Page 45 Negative side (return line) of the heater voltage for CRTs. Ground GRN_HEAT- level. BLU_HEAT- RED_ Video output signals of the VAB. about 40 VPP with peak voltage of CATHODE about 70 V. GRN_ CATHODE BLU_ CATHODE Model 220 Service Manual 2-31...
  • Page 46 Fault monitors the HVPS, LVPS, Arc Lamp, and fans. • Provides interboard communication via the IIC serial bus. • Controls Zoom and Focus of the Projection Lens. • IIC Interface control • Provides Video Overlays • X and Y convergence control 2-32 Model 220 Service Manual...
  • Page 47 (for maintenance) rather than a normal operating mode. The SCB I/O diagram (Figure 2-12) and the list of Inputs and Outputs (Table 2-11) provide information for the technician to perform module-level troubleshooting. Model 220 Service Manual 2-33...
  • Page 48 The format used is such that the assembly communicated with is used as the primary heading of each output. Input refers to an input to the SCB, output refers to an output from the SCB. 2-34 Model 220 Service Manual...
  • Page 49 Threshold correction information for blue. Real time data at 0 volt to 1 volt. GRN_THRES Similar to BLU_THRES RED_THRES Similar to BLU_THRES BLU_SENS Sensitivity correction information for BLU. Real time data at O volt to 1 volt. GRN_SENS Similar to BLU_SENS RED_SENS Similar to BLU_SENS Model 220 Service Manual 2-35...
  • Page 50 1 VPP. Y_GRN_ Grn Y convergence waveform. The amplitude for full scale correction CONV is about 1 VPP. Y_BLU_ Blu Y convergence waveform. The amplitude for full scale correction CONV is about 1 VPP. 2-36 Model 220 Service Manual...
  • Page 51 Power for the analog portions of the SCB +5.1V_Stby Standby power to the CPU and peripherals. /LV_OK Tells SCB status of non-standby supply (all outputs working or not) OUTPUTS DESCRIPTION FAN_ENA Signal to enable the 24V standby power Model 220 Service Manual 2-37...
  • Page 52 • Phase locked loop • Blanking pulse generation • Horizontal and vertical phase adjustments • Interlace detection and odd field pulse generation • Horizontal frequency band selection • Horizontal line count and vertical count generation 2-38 Model 220 Service Manual...
  • Page 53 These bands are outputted through the IIC interface to be used by the System Controller Board. These lines are also outputs of the RTG board through the Backplane Board. The Horizontal/Vertical Deflection Board uses these lines for proper selection of retrace times. Model 220 Service Manual 2-39...
  • Page 54 Selects the Sync tip option of video clamp signal VTR_MODE Selects VTR mode of operation Right blanking Data for adjustment of right blanking Left blanking Data for adjustment of left blanking Top blanking Data for adjustment of top blanking 2-40 Model 220 Service Manual...
  • Page 55 This signal is high for noninterlaced signals 280_CLK Square wave signal, 50 % duty cycle, 280 times the frequency of horizontal sync. This clock is synchronized to the horizontal sync. VIDEO PROCESSOR BOARD INPUTS DESCRIPTION Model 220 Service Manual 2-41...
  • Page 56 Power for digital portion of RTG board +15V Power for the phase locked loop and the supporting circuitry of RTG board -15V Power for the phase locked loop and the supporting circuitry of RTG board 2-42 Model 220 Service Manual...
  • Page 57 • Vertical raster centering for all three colors • IIC interface IIC Interface All adjustments for the HVD board are performed by the System Controller via the IIC serial bus interface. This three wire bus Model 220 Service Manual 2-43...
  • Page 58 Table 2-14 lists the adjustments executed via the IIC bus interface (I = Input to HVD board , O = Output from HVD board): Figure 2-14. Horizontal/Vertical Deflection PCB I/O Diagram. 2-44 Model 220 Service Manual...
  • Page 59 Revision of HVD board Horizontal/Vertical Deflection Board I/O This section provides a description of the inputs to and outputs from the HVD Board. The I/O descriptions are arranged by the source/destination of the signal. The assembly communicated with Model 220 Service Manual 2-45...
  • Page 60 Current feedback of blue vertical amplifier OUTPUTS DESCRIPTION H_OUT_ Horizontal output flyback pulse, about 800 VPP FLYBACK H_LOCK+ Horizontal interlock for yoke connectors. This should be about 5 V when closed or 15 V when open. 2-46 Model 220 Service Manual...
  • Page 61 + 15 V supply for use by HVD and Scan Reversal Boards -15 V - 15 V supply for use by HVD and Scan Reversal Board +80 V + 80 V supply for use by the switching supply of horizontal deflection amplifier Model 220 Service Manual 2-47...
  • Page 62 Phase locked loop for ILA assembly drivers • IIC serial bus interface The Convergence/Deflection Input/Output diagram (Figure 2-15) and the list of inputs and outputs (Tables 2-16 and 2-17) provide information for the technician to perform module level troubleshooting. 2-48 Model 220 Service Manual...
  • Page 63 No. of Information Description Output bits ILA_FREQ_N1 Data for selection of frequency of ILA bias circuit ILA_FREQ_N2 Data for selection of frequency of ILA bias circuit ILA_FREQ_N3 Data for selection of frequency of ILA bias circuit Model 220 Service Manual 2-49...
  • Page 64 Data for adjustment of green top/bottom skew TP_BLU_SKEW Data for adjustment of blue top/bottom skew TP_BOW Data for adjustment of top/bottom bow TP_PIN Data for adjustment of top/bottom pincushion TP_PIN_BAL Data for adjustment of top/bottom pincushion balance 2-50 Model 220 Service Manual...
  • Page 65 CONV correction is about 1 VPP. Y_BLU_ Blue Y convergence waveform. The amplitude for full scale CONV correction is about 1 VPP. CORR_ Square wave HCT level synchronization signal for horizontal axis SYNC OUTPUTS DESCRIPTION Model 220 Service Manual 2-51...
  • Page 66 Current feedback of red vertical (Y) convergence amplifier Y_GRN- Current feedback of green vertical (Y) convergence amplifier Y_BLU- Current feedback of blue vertical (Y) convergence amplifier OUTPUTS DESCRIPTION X_RED+ Output of red horizontal (X) convergence amplifier 2-52 Model 220 Service Manual...
  • Page 67 + 5 V supply for use by convergence board. +15 V + 15 V supply for use by convergence board. -15 V - 15 V supply for use by convergence board. Interlocks and protection None Model 220 Service Manual 2-53...
  • Page 68 The SRB does not require any IIC bus interface. Table 2-18. Scanning signal states FRONT/REAR FLOOR/CEIL MODE OF OPERATION LINE LINE Front and floor projection Front and ceiling projection High Rear and floor projection High Rear and ceiling High High 2-54 Model 220 Service Manual...
  • Page 69 The assembly communicated with is the primary heading of each group of signals. Those signals are subdivided into inputs and outputs. Input refers to an Input to the Scan Reversal Board. Output refers to an output from the Scan Reversal Board. Model 220 Service Manual 2-55...
  • Page 70 Horizontal current feed back, a DC signal proportional to horz. output current DEFL_OK Deflection status line high (about 2 V) = good low = no scan CONVERGENCE/DEFLECTION BOARD INPUTS DESCRIPTION X_RED+ Output of horizontal red convergence amplifier 2-56 Model 220 Service Manual...
  • Page 71 Bottom of red horizontal convergence yoke Y_RED_YOK+ Top of red vertical convergence yoke Y_RED_YOK- Bottom of red vertical convergence yoke GREEN YOKE CONNECTOR NAME DESCRIPTION H_GRN_YOK+ Top of green horizontal yoke H_GRN_YOK- Bottom of green horizontal yoke Model 220 Service Manual 2-57...
  • Page 72 Top of blue vertical yoke V_BLU_YOK- Bottom of blue vertical yoke X_BLU_YOK+ Top of blue horizontal convergence yoke X_BLU_YOK- Bottom of blue horizontal convergence yoke Y_BLU_YOK+ Top of blue vertical convergence yoke Y_BLU_YOK- Bottom of blue vertical convergence yoke- 2-58 Model 220 Service Manual...

  • Page 73: Backplane Pcb

    Refer to Figure 2-17 for a general idea of how the projector wiring is interconnected through the Backplane PCB. ALPS LVPS HVPS VIC #1 Backplane VIC #2 VIC 3# HVDB Proj Lens Fans Figure 2-17. Backplane Board Interface Block Diagram. Model 220 Service Manual 2-59...

  • Page 74: Image Light Amplifier Technology

    CRT is focused through a relay lens. This image is electrostatically coupled through the light-blocking layer and mirror to a liquid crystal layer on the output ® side of the ILA assembly. 2-60 Model 220 Service Manual...
  • Page 75 The modulated high-intensity light is reflected back out of the ® output side of the ILA assembly, through the Prism and the Projection Lens and onto the screen. (see Figure 2-19). Figure 2-19. Simplified Image/Optical path. Model 220 Service Manual 2-61...
  • Page 76 3.12 Cleaning Lens, ILA assemblies, and Mirrors ......... 3-18 This chapter details adjustment procedures required to maintain the Model 220. Refer to Figures 4-1 and 4-11 to locate the assemblies and components. A tool list, required to perform adjustments, is in Chapter 1.

  • Page 77: Chapter 3 Service Adjustments

    Try to obtain a uniform circular area. NOTE: The Model 220 uses an integrated lamp/reflector system. Normally no adjustment is required, except for Z-axis focus, when replacing the arc lamp. It is not possible to predict how much variation there will be from lamp to lamp.
  • Page 78 Light beam coming from First Condensing Lens is extremely intense and hazardous. Keep hands and other objects away. Optical Shield Figure 3-2. Optical area with Optical Shield removed. E. Put on safety goggles now! Model 220 Service Manual...

  • Page 79: Arc Lamp Current Setting

    Figure 3-3. Arc Lamp “Hot Spot” (whitest area) is off-center vertically and horizontally. Adjust to center the “hot spot”. Arc Lamp Current Setting The Arc Lamp current must be set whenever an Arc Lamp or Arc Lamp Power Supply is replaced. Routinely recheck current about Model 220 Service Manual...

  • Page 80: Arc Lamp Current Setting

    3. Pull out the release pin on the rear-right side of the electronic module to tilt it up. Tilt the electronic module up to a vertical position. 4. Ensure the holding pin locks the electronic module in place. Model 220 Service Manual...

  • Page 81: Ila ® Back Focus

    Relay Lens. ® 11. Slide the Relay Lens/CRT/ILA assembly forward or backward until the sharpest spacer ball focus is achieved. NOTE: Do not use the zoom lens focus while performing this step. Model 220 Service Manual...

  • Page 82: Crt Mechanical Focus

    CRT shield (Figure 3-5). The CRT is now free to slide. 7. Grasp the CRT thumbscrew (Figure 3-5) and slide the CRT back and forth until the image is focused as sharply as possible Model 220 Service Manual...

  • Page 83: Crt Rotation

    The CRT tilt adjustment aligns the CRT level with the screen. This is a factory-set adjustment and should not need adjusting unless the CRT or yoke is moved. Remove the rear cover (Section 4.2) and tilt the electronic module up (Sections 3.3). Model 220 Service Manual...

  • Page 84: Crt Rotation

    Skew) to the values noted previously in Step 4. 11. Recheck Bow, Pincushion, Keystone, and Skew and readjust if necessary. Also recheck Convergence (refer to the Model 220 User’s Guide). 12. Repeat the above procedure for any other CRT that is not level.

  • Page 85: Ila ® Overlap

    Step 2. ® To perform an ILA Overlap adjustment: Remove the rear cover (Section 4.2) and tilt the electronic module up (Sections 3.3). 1. Continue with all three colors hidden. 3-10 Model 220 Service Manual...

  • Page 86: Jumper Settings

    Scan Reversal Board, and the proper location for front and rear projection. The Model 220 Projector is shipped with the jumper plugs inserted in J50 and J100 for front projection. For a rear projection setup, these jumpers must be inserted into JA50 and J101.

  • Page 87: Inverted Vertical Jumper Settings

    Scan Reversal Board and indicates the proper location for ceiling or floor projection. The Model 220 Projector is shipped in the normal vertical projection position with the jumper plug inserted into J53. For an inverted vertical setup this jumper plug must be inserted into J53A.

  • Page 88: Vertical And Horizontal Size Settings

    3. Hide Blue and view Red and Green. 4. If Red is higher than Green at the top and lower than Green at the bottom of the X-hatch image, or If lower than Green at the Model 220 Service Manual 3-13...

  • Page 89: Software Updating

    6. Replace the electronic module and rear cover. 3.11 Software Updating The Model 220 software resides in Flash Memory and is updated via the projector's serial Port A. To perform an update, a disk containing the updated Boot Software (boot.hex) and/or System Software (zsys.hex) and a PC with Windows 3.1 (avoid Windows...
  • Page 90 (where x.x.0 is the currently loaded Boot Manager version (e.g. 0.9.0 or 1.1.0). –Boot Manager Ver x.x.0 (Service Mode Startup) –Copyright (c) 1994 Hughes JVC Technology –Command: _ 11. Verify that the Boot Manager version is correct. If it is necessary to update the Boot Manager, perform the following steps.
  • Page 91 Accessories window), select "Transfers/Send Text File", then select "List Files of Type:All Files", and select the disk and/or directory with the Model 220 software. You should see a file named "boot.hex". Select this file and press the OK button to begin the upload.
  • Page 92 “Send Text File Dialog” box, select “List Files of Type: All Files” and select the disk and/or directory with the Model 220 software. Select file named “zsys.hex”. Press OK to start upload. 12C. During upload, a progress indicator updates the number of records received.

  • Page 93: Cleaning Lenses, Ila Assemblies And Mirrors

    Mirrors and Polarizing Beam Splitter Windows: The Optical Shield covers the Dichroic Mirror Assembly and Polarizing Beam Splitter windows. Normally cleaning is not needed. Clean only if absolutely necessary using compressed air. Do not wipe mirrors. 3-18 Model 220 Service Manual...
  • Page 94 • Allow a discharge time of at least one minute for the high voltage to bleed off, then unplug the power cord from the AC wall outlet. • Observe all Cautions and Warnings Model 220 Service Manual...

  • Page 95: Introduction

    If any problems are observed, call HJT. When references are made in this chapter to assemblies and components, refer to Figures 4-1 and 4-14 for their locations. Model 220 Service Manual...
  • Page 96 Chapter 4---Maintenance (Removal/Replacement) Figure 4-1. Major components of the Model 220 Projector. Model 220 Service Manual...

  • Page 97: Projector Covers

    Place the ends of the Latch Levers into the holding slots. CAUTION! Immediately after removing the front or rear cover, pull up the power interlock switch. This allows power to be reapplied to the fans to cool the Arc Lamp. Model 220 Service Manual...

  • Page 98: Air Filters

    Remove the filters and vacuum them or blow them clean with compressed air. They may also be washed with soap and water. There are 3 polyurethane air filters in the Model 220 that require periodic cleaning. They are located as follows: •...

  • Page 99: Arc Lamp Assembly

    Swing the fan outward to the right and out of the way. 6. Disconnect the Arc Lamp cable and pull it through the hole in the top of the Arc Lamp housing so the Arc Lamp will have clearance to be removed. Model 220 Service Manual...

  • Page 100: Ignitor Assembly

    4. Use a thin-bladed knife or screwdriver and carefully pry the Ignitor away from the Arc Lamp wall. The replacement Ignitor will have new adhesive backing. 5. Replace Ignitor Assembly in reverse order. Model 220 Service Manual...

  • Page 101: Arc Lamp Power Supply

    2. Remove the lower-right-front-side panel by removing the 5 pozidrive screws securing it. 3. Remove the 2 pozidrive screws from the bottom of the EMI shield and slide it out of the way to the left. Model 220 Service Manual...

  • Page 102: Low Voltage Power Supply

    3. Remove the 2 pozidrive screws securing the EMI Shield. Slide the shield to the left and remove it. 4. Remove J76 (DC Output) and J75 (AC Input) from the left side of the Low Voltage Power Supply. NOTE: Model 220 Service Manual...

  • Page 103: High Voltage Power Supply

    HVPS at the top of the cover and loosening the 1 pozidrive screw at the bottom of the front flap (Do not remove this bottom screw-it is difficult to reinstall. The HVPS will slide up and over it). Figure 4-5. High Voltage Power Supply cover. 4-10 Model 220 Service Manual...
  • Page 104 12. Loosen (do not remove) the 2 pozidrive screws (at the bottom of the HVPS) that secure the HVPS metal housing to the projector. 13. Remove the 2 pozidrive screws that hold the top of the HVPS metal housing to the projector frame. Model 220 Service Manual 4-11...

  • Page 105: Raster Timing, System Controller, Video Processor Pcbs

    NOTE: To remove connectors on the printed circuit boards in the sections below, push the connector in slightly, then squeeze the tab and pull the connector out. 4-12 Model 220 Service Manual...

  • Page 106: Convergence/Deflection Pcb

    6. Reinstall the Convergence/Deflection PCB by lowering the right side in first until it clears the electronic module edge, then lowering the left side in. NOTE: it Model 220 Service Manual 4-13...

  • Page 107: Horizontal/Vertical Deflection Pcb

    Carefully fit the board over the mounting screws and slide the board into position. Tighten the screws and reconnect the connectors. 4-14 Model 220 Service Manual...

  • Page 108: Video Input Cards (Vics)

    CRT Holder Ring completely. NOTE: The holder ring should only be hand-tight. If it cannot be removed by hand, a flathead screwdriver can be used in the slots on the CRT Holder Ring (Figure 3-5) to help Model 220 Service Manual 4-15...
  • Page 109 Video Amplifier Board. 9. Disconnect the 3 connectors (push in slightly, squeeze the tabs, and pull out), J67, J68, and J69 from the Video Amplifier PCB. Move the cables out of the way. 4-16 Model 220 Service Manual...
  • Page 110 Connectors attached at the end in a “breakaway” arrangement (Figure 4-9). Use a pair of diagonal cutters and carefully cut the socket connectors away from the Video Amplifier PCB. The spacers between the CRT Socket Connectors can be discarded. Model 220 Service Manual 4-17...

  • Page 111: Crt/Yoke Assembly

    If dropped they can implode and flying glass can cause severe injury to personnel. Be careful not to bump or drop the CRT. Place in a safe area immediately after removal. 4-18 Model 220 Service Manual...
  • Page 112 CRT Holder Ring to help loosen it. Do not use a tool of any kind to tighten this ring-it should be hand tight only. CAUTION! For the Green CRT/Yoke Assembly only, this step is best performed with the Green CRT Model 220 Service Manual 4-19...

  • Page 113: Ila Assembly

    ® To remove an ILA Assembly: 1. Remove the rear cover (Section 4.2). 2. Tilt up the Electronic Module (Section 3.3). 3. Disconnect the connector on the top of the appropriate ® assembly. (Figure 4-11). 4-20 Model 220 Service Manual...

  • Page 114: Relay Lens

    To remove a Relay Lens (refer to Figure 4-11): 1. Remove the rear cover (Section 4.2). 2. Tilt up the Electronic Module (Section 3.3) 3. Remove the corresponding CRT Assembly behind the Relay Lens that is to be removed. Model 220 Service Manual 4-21...

  • Page 115: Projection Lens

    Carefully slide the lens out. Figure 4-13. Projection Lens holding screw and removal notch. 5. Replace the Projection Lens in reverse order. NOTE: The same basic procedure above is used to install or remove optional fixed lenses. 4-22 Model 220 Service Manual...

  • Page 116: Prism Assembly

    2 connectors on the hinge assembly for the shutter motors (1 in front and 1 in rear). Remove and label the jumper that connects the front interlock switch to the rear interlock switch. Model 220 Service Manual 4-23...
  • Page 117 Chapter 4---Maintenance (Removal/Replacement) 8. Remove the Rollbar Bracket that was holding up the left side of the Rollbar assembly. ® 9. Remove the 3 ILA asssemblies (Section 4.15). Figure 4-14. Dichroic Mirror Assembly. 4-24 Model 220 Service Manual...
  • Page 118 11. The Prism is now free to be removed. CAUTION! The Prism assembly is heavy (about 70 lbs). Use two people to lift it out of the projector. 12. Replace the Prism assembly in the reverse order. Model 220 Service Manual 4-25...
  • Page 119 Chapter 4---Maintenance (Removal/Replacement) 4-26 Model 220 Service Manual...
  • Page 120 Generator, the Video Processor Board, the Scan Reversal Board, the Convergence/Deflection Board, the Video Amplifier Board, the Low Voltage Power Supply, and the High Voltage Power Supply. Figure 5-1. Projector rear with cover and rear panel off. Model 220 Service Manual...
  • Page 121 Chapter 5---Troubleshooting Figure 5-2. Left side of projector with rear cover off. Figure 5-3. Right Side of projector with rear cover off. Model 220 Service Manual...

  • Page 122: Error Codes

    Figure 5-4. Convergence/Deflection and Video Amplifier LEDs. 5.2 Error Codes For certain errors that may occur in the Model 220 Projector the software provides error codes that are helpful in determining the nature of the problem. These error codes can be seen on the left side of the monitor screen when using a PC connected to Port A or Port B.

  • Page 123: Error Codes

    “HVD PCA Not OK” HVD_OK is High (BAD)-[/HVD_OK requires RTG Timing. “VA PCA Missing” “No Slave Ack” status on first poll of VA. Table 5-2 Error Codes (continued) “VA PCA Not OK” /VA_OK is High (BAD). Model 220 Service Manual...
  • Page 124 Failed” (only if the PC is connected to Port A). This is a very rare but serious error. If it occurs, copy the 3 lines that appear on the screen, note what occured just prior to this failure, and call Hughes-JVC. Model 220 Service Manual...

  • Page 125: Troubleshooting Guide

    Clicking noise not LVPS, ALPS, or Ignitor 4.6, 4.5, 4.4 audible when projector is faulty. Replace LVPS, turned on. ALPS, or Ignitor. Arc Lamp ignites but will Replace defective Ignitor. not stay lit. Model 220 Service Manual...
  • Page 126 Rotation procedure. Horizontal size is Adjust horizontal coils on 3.10 different between colors. Scan Reversal Board. Vertical size is different Adjust vertical size pots 3.10 between colors. on Horizontal/Vertical Deflection board. Table 5-3. Troubleshooting Guide (continued) Model 220 Service Manual...
  • Page 127 Replace burn-in CRT or 4.15, 4.16 ® assembly Reversed ghost image on If projecting through screen. glass, prevent light from reflecting back into the lens. Picture lacks depth of Adjust Contrast or User’s Guide 5.11.2, field. Brightness. 5.11.1 Model 220 Service Manual...
  • Page 128 Tether cable cable. on the Remote. No Response when Intermittent operation. Replace remote battery using IR remote. or move closer to the projector. Stay in the “Line of sight” of the projector IR Receiver. Model 220 Service Manual...
  • Page 129 Chapter 5---Troubleshooting 5-10 Model 220 Service Manual...

  • Page 130: Chapter 6 Parts List

    PCA, Backplane 102595 PCA, HDTV VIC (Option) 103765 PCA, Quad RGB Input VIC (Option) 103668 PCA, Quad Standard Decoder VIC (Option) 103545 PCA, Scan Reversal 102585 PCA, Video Input Card 102597 Power Cord, 110 VAC 103253 Series 220 Service Manual...
  • Page 131 Chapter 6---Parts List Power Cord, 220 VAC 103939 Power Supply, Arc Lamp 104114 Power Supply, High Voltage 102566 Power Supply, Low Voltage 102520 Prism Assembly 103942 Projection Lens, 1.5:1 Fixed 104003 Projection Lens, Zoom (2.6 to 5.1:1) 103746 Remote Control, Standard...

  • Page 132: Appendix A Import/Export

    Model 220 Configuration Data Export / Import Procedure Rev 1.0.0 This appendix defines the steps to perform a Configuration Data Export & Import from the Model 220 projector to a Host Computer. The Host Computer can be any system that has RS232 download and upload capability, including an IBM-PC compatible, an Apple MacIntosh, or a UNIX system.
  • Page 133 Know the directory and filename for uploading the Import Data. The Windows TERMINAL: Transfers: Send Text File... dialog box will default to the C:\windows directory which contains several *.txt files - SETUP.TXT is NOT a Projector EXPORT file! Model 220 Service Manual...
  • Page 134 At successful end, TERMINAL will remove the bottom line. Model 220 Menu: When the projector detects the successful end of the transfer the following screen is displayed: ================================= Import Configuration IMPORT COMPLETE New Configuration is active Model 220 Service Manual...
  • Page 135 Windows TERMINAL: FIRST press STOP to end the Host Upload transfer. 9.2. Model 220 Menu: THEN press ESC to exit the projector Import operation and return to the Maintenance Menu. There is a 10 second pause before the screen is redrawn.

  • Page 136: Glossary Of Terms

    Glossary Of Terms Amorphous Without definite form; not crystallized. Arc Lamp The xenon arc lamp in the Model 220 projector. It operates at high temperatures (160° to 200°) and produces dangerously intensive light with hazardous levels of ultraviolet and infrared radiation.

  • Page 137: Appendix B Glossary

    (field one) and then all the even lines (field two) of one frame. I/R Windows The Model 220 Projector has two I/R windows, one in front, one in back. These windows receive projector control signals from the I/R remotes. Lamphouse Dock The housing that contains the Ignitor, the Laser Power Supply, and the Arc Lamp assembly.
  • Page 138 S-VHS tape machines use a special output terminal which allows separate output of luminance (Y) and chrominance (C) picture information to monitors equipped with S-Video inputs. S-Video A video signal that has the luminance (Y) information separated from chrominance (C) information. Model 220 Service Manual...
  • Page 139 Technician Remote Remote control used during Model 220 setup and adjustment. Alternative to Standard Remote. Provides access to many of the setup functions by direct keys instead of by menu maneuvering.
  • Page 140 Glossary Model 220 Service Manual...

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