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...
Page 5 - Contents
Chapter 1---Introduction Model 250 Service Manual 1-1 1.0 Introductio n Contents 1.1 Safety............................................................................................................ 1-11.2 Updates ........................................................................................
Page 6 - Used
Chapter 1---Introduction 1-2 Model 250 Service Manual When performing procedures that call for the projector’s power to be on, alwayswear high voltage gloves (ANSI/ASTM 10,000 volt rated) when working aroundthe CRTs, Arc Lamp or power supplies. Wear safety goggles (rated X5) whenworking near the lig...
Page 8 - System De s cription
Chapter 2---System Description Model 250 Service Manual 2-1 2.0 System De s cription Contents 2.1 Introduction .................................................................................................. 2-1 2.2 Electrical Section...................................................................
Page 9 - Overview of the Model 250 projector showing major components; Electrical Section; Incoming Power Circuit
Chapter 2---System Description 2-2 Model 250 Service Manual Figure 2-1 Overview of the Model 250 projector showing major components 2.2 Electrical Section The electrical section consists of the Incoming Power Circuit, and the PowerSupplies and the Igniter Assembly. The following paragraphs give a li...
Page 10 - Igniter Assembly; Optical Section; Arc Lamp Module; This will result in a more uniform image on the screen
Chapter 2---System Description Model 250 Service Manual 2-3 Igniter Assembly The Igniter Assembly provides the high voltage pulse that lights the Arc Lampand acts as a link from the Arc Lamp Power Supply to the Arc Lamp after the ArcLamp has been lit. ! Igniter - The Igniter actually performs three ...
Page 11 - ILA
Chapter 2---System Description 2-4 Model 250 Service Manual ! Condensing Lenses (2) - The Primary Condensing Lens collects all thelight from the Light Pipe and begins to bend the light rays into a straightpath. The Secondary Condensing Lens works with the PrimaryCondensing Lens to collimate or “stra...
Page 12 - Front Projection Lens; Fixed Lens; Electronic Section; YPbPr VIC - Composite Video Decoding for YPbPr
Chapter 2---System Description Model 250 Service Manual 2-5 Relay Lens Assemblies (3) There are three Relay Lenses, one for each color. The Relay Lens focuses theimage light from the CRT onto the photosensitive layer on the input side of theILA ® . The Relay Lens is physically connected to the CRT (...
Page 14 - s, but they are included in the; Miscellaneous Items; Projector Covers
Chapter 2---System Description Model 250 Service Manual 2-7 provides an interconnection interface for all the electronic components inthe projector. CRT/Yoke Assemblies The CRT/Yoke Assemblies bridge between the Optical and the Electronicsections. The CRTs could be included in the Optical section be...
Page 15 - and cause; EMI Shield; Relative location of CRTs, Relay Lenses, ILA
Chapter 2---System Description 2-8 Model 250 Service Manual projector. These air-borne particles can land on optics such as the ILA ® and cause large diffuse dark areas on the screen. EMI Shield The Model 250 has an EMI (Electro-Magnetic Interference) Shield that traps andcollects high frequency noi...
Page 17 - Before performing procedures in this chapter,; WARNING; When performing procedures in this chapter; CAUTION; It is very strongly recommended that setup
Chapter 3---Electrical Model 250 Service Manual 3-1 3.0 Electrical Contents 3.1 Safety............................................................................................................ 3-13.2 Incoming Power Circuit ..............................................................................
Page 18 - AC Power Cord
Chapter 3---Electrical 3-2 Model 250 Service Manual Left/Right Orientation: When referring to the left or right in this chapter, it is withreference to standing at the rear of the projector, facing the screen. Connectors on subassemblies and PCBs have tabs that must be released firstbefore pulling o...
Page 19 - Supplies; Low Voltage Power Supply
Chapter 3---Electrical Model 250 Service Manual 3-3 3.3 Power Supplies All Series 200 projectors including the Model 250 have three power supplies.These include: ! Low Voltage Power Supply ! Arc Lamp Power Supply ! High Voltage Power Supply There is a fourth power supply, the Laser Power Supply, but...
Page 21 - LVPS - Service Adjustments
Chapter 3---Electrical Model 250 Service Manual 3-5 ! +5.1V for digital components ! +6.2V for CRT filaments ! ±15V for analog circuits ! +80V supply used by the High Voltage Power Supply, Video AmplifierPCB, and the Horizontal/Vertical Deflection PCB. LVPS - Service Adjustments There are no service...
Page 22 - Run Voltage - 25 to 31 V to maintain the arc lamp operation.
Chapter 3---Electrical 3-6 Model 250 Service Manual ALPS - Inputs: AC input power: Directly from the AC Line Filter. The input range is from 220-240 VAC, at 50/60 Hz. /LAMP_ENA - from the System Controller PCB. Turns on the ALPS. /COVER_ON - signal enabling the Arc Lamp Power Supply. /LAMP_OK - the ...
Page 23 - Arc Lamp Power Supply signals and voltages.
Chapter 3---Electrical Model 250 Service Manual 3-7 Figure 3-2 Arc Lamp Power Supply signals and voltages. ALPS - Operation: Three signals (/LAMP_ENA, /COVER_ON, and /LAMP_OK) are required inorder for the Arc Lamp Power Supply to light the Arc Lamp. The /LAMP_OK(active low) input is jumpered to grou...
Page 24 - Arc Lamp Power Supply connections.; ALPS - Service Adjustments; Tools Needed
Chapter 3---Electrical 3-8 Model 250 Service Manual The Arc Lamp Power Supply sends the/LAMP_LIT signal back to the System Controller when the Arc Lamp is lit. The Arc Lamp regulates its output to give a constant Arc Lamp power. If the ArcLamp has not lit within 20 seconds (/LAMP_LIT still high), th...
Page 25 - NOTE
Chapter 3---Electrical Model 250 Service Manual 3-9 2. Turn the AC Circuit Breaker to the OFF position and unplug the ACPower Cord. 3. Remove the front cover (see section 6.1 Projector Covers ). 4. Remove the lower-right-side panel by removing the five Pozi-drive screwssecuring it. 5. Remove the fiv...
Page 26 - G1 Supply - goes to Video Amplifier PCB
Chapter 3---Electrical 3-10 Model 250 Service Manual Figure 3-4 High Voltage Power Supply I/O signals. HVPS - Inputs HVPS_SYNC - this signal is generated on the Raster Timing Generator PCB.Square wave HCT level with 50 or 33% duty cycle. The signal is synchronized tohorizontal sync. /HV_ENA - The HV...
Page 27 - HVPS - Service Adjustments
Chapter 3---Electrical Model 250 Service Manual 3-11 RGB Anode Voltage - goes directly to each CRT RGB Focus Voltage - goes directly to each CRT Arc Ground - The Arc Ground protection for each CRT from the Video AmplifierPCB. HVPS - Operation The High Voltage Power Supply has three basic functions. ...
Page 28 - HVPS - Remove and Replace; Electronic
Chapter 3---Electrical 3-12 Model 250 Service Manual HVPS - Remove and Replace Tools Needed #1 Pozi-drive Phillips-head screwdriver #2 Pozi-drive Phillips-head screwdriver small Flathead screwdriver Parts Needed High Voltage Power Supply p/n 102566 To remove the High Voltage Power Supply: 1. Power o...
Page 29 - Description; Disconnect the three CRT Anode Cables.
Chapter 3---Electrical Model 250 Service Manual 3-13 Table 3-1 HVPS - P45 I/O Pinout PIN # Description PIN # Description 1 GND (+80V) 9 +15V 2 GND (+15V) 10 -15V 3 GND (-15V) 11 G1 SUPPLY 4 GND (G1) 12 /HV_ENA 5 /HV_OK 13 V PARABOLA 6 H PARABOLA 14 H DRIVE (HVPS_SYNC 7 GND (DAF) 8 +80V Figure 3-6 Hi...
Page 30 - Reinstall the High Voltage Power Supply in the reverse order.; Replace the HVPS cover.
Chapter 3---Electrical 3-14 Model 250 Service Manual 10. Disconnect P45 (“Control”) at upper left of HVPS. 11. Disconnect and label the three Focus cables. The square tabs on thesecables (see Figure 3-6) may have to be lifted up. Gently pry up with asmall Flathead screwdriver. 12. Remove all the cab...
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
Chapter 3---Electrical Model 250 Service Manual 3-15 3.4 Igniter Assembly The Igniter Assembly consists of the Igniter and the Laser Power Supply. TheIgniter and Laser Power Supply are replaced as one unit. Igniter Assemby - Main Functions: ! Generates 32 kV pulse to light Arc Lamp Power ! Acts as l...
Page 32 - Igniter Assembly - Service Adjustments; Replace the Igniter and the Laser Power Supply as one unit.
Chapter 3---Electrical 3-16 Model 250 Service Manual Figure 3-7 Igniter Assembly. Igniter Assembly - Service Adjustments There are no service adjustments performed on the Igniter Assembly. Igniter Assembly - Remove and Replace Replace the Igniter and the Laser Power Supply as one unit. Tools Needed ...
Page 33 - Lift the Igniter Assembly out of projector.
Chapter 3---Electrical Model 250 Service Manual 3-17 5. Disconnect the orange cable attached to the input side of the IgniterTransformer using the 7/16-inch wrench. This cable will have black shrinksleeving on it. It goes to the negative terminal of the Arc Lamp PowerSupply. 6. Disconnect the orange...
Page 35 - Lamp; Arc Lamp - Service Adjustments
Chapter 4---Optical 4-2 Model 250 Service Manual 4.1 Arc Lamp The Arc Lamp is the beginning of the high intensity Light Path. It is locatedinside a housing on the right side of the Optical Support Assembly (see Figure4-5). Arc Lamp - Main Functions: The Arc Lamp is a single component composed of a X...
Page 36 - Fan disconnection is acceptable for a short
Chapter 4---Optical Model 250 Service Manual 4-3 CAUTION ! Fan disconnection is acceptable for a short period of time only (preferably <20 minutes--maximum 45 minutes). WARNING!!! Dangerous levels of ultraviolet and infrared radiation, dangerous glare, very high temperatures (180°C to300°C) and h...
Page 37 - Arc Lamp “Hot Spot” (brightest area) is off-center vertically and
Chapter 4---Optical 4-4 Model 250 Service Manual Hot spot off-center Figure 4-1 Arc Lamp “Hot Spot” (brightest area) is off-center vertically and horizontally. Adjust to center the “hot spot”. Figure 4-2 Arc Lamp alignment fixture.
Page 38 - Arc Lamp Assembly access door.; Arc Lamp - Remove and Replace
Chapter 4---Optical Model 250 Service Manual 4-5 Figure 4-3 Arc Lamp Assembly access door. Arc Lamp - Remove and Replace The Arc Lamp Enclosure Assembly consists of the Xenon Arc Lamp module andblower. Replace the blower together with the Arc Lamp Module. Tools Needed 7/16 inch wrench #1 Pozi-drive ...
Page 39 - Disconnect large blower fan connector.
Chapter 4---Optical 4-6 Model 250 Service Manual 5. Disconnect the orange Cathode cable from the Igniter, using the 7/16-inchwrench (see Figure 3-7). 6. Cut the cable tie that is wrapped around the ferrite inductor (metal tubewith white cap below the blower). 7. Disconnect the Arc Lamp door fan cabl...
Page 40 - Path; Optical Path - Main Function
Chapter 4---Optical Model 250 Service Manual 4-7 Figure 4-4 Arc Lamp Assembly top view. 4.2 Optical Path Optical Path - Main Function ! Transports the Arc Lamp high intensity light from the Arc Lamp to theILA ® and from the ILA ® to the Projection Lens ! Removes the Infrared light that contains most...
Page 41 - Optical Path - Inputs; Arc Lamp high intensity white light; Optical Path - Outputs; Component RGB polarized light to the ILA; Optical Path - Operation
Chapter 4---Optical 4-8 Model 250 Service Manual Figure 4-5 Upper level view of Optical Path (top view). Optical Path - Inputs Arc Lamp high intensity white light Component RGB Image light from each of the ILA ® Optical Path - Outputs Component RGB polarized light to the ILA ® Output image light to ...
Page 43 - Optical Path
Chapter 4---Optical 4-10 Model 250 Service Manual Figure 4-6 Optical Path
Page 44 - Optical Path - Service Adjustments
Chapter 4---Optical Model 250 Service Manual 4-11 Figure 4-7 Optical Path Optical Path - Service Adjustments Tools Needed 3-mm Hex wrench Parts Needed No serviceable parts The one adjustment that can be performed on the optical path is with the XYPositioner that moves the #1 Condensing Lens in the X...
Page 45 - To adjust the XY Positioner:
Chapter 4---Optical 4-12 Model 250 Service Manual Positioner adjusts the light beam coming out of the Light Pipe so that it projectssquarely onto the face of the ILA ® . NOTE: Do not adjust the XY Positioner unless there is a dark edge visible on screen. If the XY Positioner is misaligned, there wil...
Page 48 - If the green ILA
Chapter 4---Optical Model 250 Service Manual 4-15 NOTE: Reset the ILA ® bias after setting the Compensator and check G 2 Sensitivity Offset, and Threshold Offset level (see Model 250 User’sGuide, section 5.8 Black Level G 2 and Sensitivity Offset). ILA ® Overlap This adjustment positions the ILA ® a...
Page 51 - volt rated
Chapter 4---Optical 4-18 Model 250 Service Manual WARNING!!! Always wear an ANSI/ASTM 10,000 volt rated safety glove when working around CRTs due to the High Voltage present there. NOTE: If the ILA ® /Relay Lens/CRT assembly cannot be moved close enough to get a good spacer ball focus, loosen the CR...
Page 53 - Lenses; Projection Lens - Input
Chapter 4---Optical 4-20 Model 250 Service Manual 4.4 Relay Lenses The Relay Lens focuses the image light received from the CRT on thephotoconductive layer of the ILA ® (see Figure 4-9). There are no service adjustments for the Relay Lens. The Relay Lens rarely needs service and is notconsidered a s...
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
Chapter 4---Optical Model 250 Service Manual 4-21 3. Loosen (do not remove) the Lens holding screw at the right side (seeFigure 4-11) of the Projection Lens. Figure 4-11 Projection Lens holding screw and removal notch. NOTE: The 0.96:1 Projection Lens has an adapter sleeve installed on it. The Proje...
Page 57 - Never look directly at the Arc Lamp, the
Chapter 5---Electronics 5-2 Model 250 Service Manual WARNING !!! Never look directly at the Arc Lamp, the lighted Projection Lens or into the lamp housing, from any distance, whenthe projector is on. Direct exposure to light of this brightness can causesevere eye injury. 5.2 Introduction The Model 2...
Page 58 - Controller; System Controller PCB - Main Function; Provides IIC serial bus communication and control between PCBs.
Chapter 5---Electronics Model 250 Service Manual 5-3 Figure 5-2 Model 250 Electronics Module with PCBs (side view). CAUTION ! It is very strongly recommended that setup data be downloaded (Exported, see section 8.2 Importing/Exporting) beforeperforming any of the following procedures. Exporting base...
Page 59 - I/O control for VIC selection
Chapter 5---Electronics 5-4 Model 250 Service Manual ! I/O control for VIC selection ! Two RS-232 serial interface ports ! Infrared (IR) remote control interface. Accepts input from front or rear IRdetectors. ! External 3 color system status LEDs. Green indicates normal, yellow isstandby and red ind...
Page 61 - System Controller PCB I/O Diagram for other PCBs.; System Controller PCB - Inputs
Chapter 5---Electronics 5-6 Model 250 Service Manual Figure 5-5 System Controller PCB I/O Diagram for other PCBs. System Controller PCB - Inputs /LV_OK - signal from the Low Voltage Power Supply; it tells the SystemController PCB that all the non-standby supply voltages are working. /HV_OK - signal ...
Page 62 - ±15 V - from the Low Voltage Power Supply for all analog circuitry; System Controller PCB - Outputs
Chapter 5---Electronics Model 250 Service Manual 5-7 280_CLK - Square wave signal from the Raster Timing Generator PCB, with50% duty cycle, synchronized to the horizontal sync at 280 times the frequency ofthe horizontal sync. This signal is used by the System Controller PCB to properlyoutput shading...
Page 63 - LENS_FOCUS - Signal to the focus motor of the Projector Lens.; System Controller PCB - Operation; Startup Functions
Chapter 5---Electronics 5-8 Model 250 Service Manual RGB_THRES - red, green, or blue Threshold correction information to the VideoProcessor PCB. RGB_SENS - red, green, or blue Sensitivity correction information to the VideoProcessor PCB. ISYNC - 5 MHz clock to the Raster Timing Generator PCB, used t...
Page 64 - Power On timing sequence.
Chapter 5---Electronics Model 250 Service Manual 5-9 Figure 5-6 Power On timing sequence. Normal Operation Functions During normal projector operation, the System Controller PCB receivescommands through the remote control, tethered remote control, or a PC.Commands issued from the IR remote controls ...
Page 65 - System Controller PCB - Remove and Replace
Chapter 5---Electronics 5-10 Model 250 Service Manual Controller PCB also enables the selected VICs through the IIC bus based on theVIC selected on the Channel Menu. The System Controller PCB generates the on-screen menus and test patternoverlays and sends them to the Video Processor PCB. It sends t...
Page 66 - Video Processor PCB; Video Processor PCB - Main Functions
Chapter 5---Electronics Model 250 Service Manual 5-11 5.4 Video Processor PCB Video Processor PCB - Main Functions ! Video signal input and multiplexing ! Sync signal stripping ! Overlay signal multiplexing ! Brightness, Contrast, DC Restore and Blanking ! Video signal gamma correction ! Sensitivity...
Page 67 - Video Processor PCB I/O diagram for VICs and Power Supplies.
Chapter 5---Electronics 5-12 Model 250 Service Manual Figure 5-7 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
Chapter 5---Electronics Model 250 Service Manual 5-13 Figure 5-8 Video Processor PCB I/O diagram for PCBs. Video Processor PCB - Outputs RGB_VID - red, green, or blue video signal to Video Amplifier PCB, typically 0-1 V. H&V_SYNC - horizontal sync pulse goes to the Raster Timing Generator PCB. G...
Page 69 - voltage adjust control signal to the Video; Video Processor PCB - Operation; . Gamma correction consists of degrees of black and white boost. The
Chapter 5---Electronics 5-14 Model 250 Service Manual RGB_G 2 - red, green, or blue G 2 voltage adjust control signal to the Video Amplifier PCB. G 1 _BIAS - G 1 adjust control voltage (global adjustment) to the Video Amplifier PCB. IIC_INT - IIC interrupt output to System Controller PCB. Video Proc...
Page 70 - Video Processor PCB - Remove and Replace
Chapter 5---Electronics Model 250 Service Manual 5-15 The G 2 voltage accelerates the electrons that are emitted from the cathode of the CRT. The CRT filament emits the electrons and G 1 voltage regulates the amount of electrons that are emitted from the cathode. The G 2 voltage is adjusted through ...
Page 71 - Raster Timing Generator PCB; Raster Timing Generator PCB - Main Functions
Chapter 5---Electronics 5-16 Model 250 Service Manual 6. Pull the black card extractor handles back to disconnect the VideoProcessor PCB connector and pull the PCB out of the Electronics Module. 7. Reverse the procedure to install the Video Processor PCB. 5.5 Raster Timing Generator PCB Raster Timin...
Page 72 - Raster Timing Generator for other PCBs.; Raster Timing Generator PCB - Inputs
Chapter 5---Electronics Model 250 Service Manual 5-17 Figure 5-11 Raster Timing Generator for other PCBs. Raster Timing Generator PCB - Inputs V_SYNC - input vertical sync from the Video Processor PCB. H_SYNC - input horizontal sync from the Video Processor PCB. G_SYNC - Sync-on-Green sync stripped ...
Page 73 - Raster Timing Generator PCB - Outputs
Chapter 5---Electronics 5-18 Model 250 Service Manual IIC_CLK - IIC clock line. Unidirectional clock line for control of synchronousdata transfer over the IIC bus. IIC_DATA - IIC data line. Bi-directional serial line for synchronous data transferbetween System Controller PCB and Raster Timing Genera...
Page 74 - Raster Timing Generator PCB - Operation
Chapter 5---Electronics Model 250 Service Manual 5-19 V_DRIVE - square wave negative going pulse to the Convergence DeflectionPCB, synchronized to the selected vertical sync with the pulse width of about fourhorizontal periods. Raster Timing Generator PCB - Operation The Raster Timing Generator PCB ...
Page 75 - Raster Timing Generator PCB - Remove and Replace
Chapter 5---Electronics 5-20 Model 250 Service Manual Vertical Deflection PCB to break the range of horizontal scan frequencies intofour smaller ranges called bands (see Figure 5-12). Figure 5-12 LEDs on the Raster Timing Generator PCB. Raster Timing Generator PCB - Remove and Replace Tools Needed #...
Page 76 - Horizontal Vertical Deflection PCB; Horizontal Vertical Deflection PCB - Main Functions; Horizontal raster centering for all three colors; Horizontal Vertical Deflection PCB - Inputs
Chapter 5---Electronics Model 250 Service Manual 5-21 5.6 Horizontal Vertical Deflection PCB Horizontal Vertical Deflection PCB - Main Functions ! Drive the main horizontal deflection coils to provide horizontal raster scanfor the CRTs ! Drive main vertical coils to provide vertical raster scan for ...
Page 78 - Horizontal/Vertical I/O Diagram for Scan Reversal and Video
Chapter 5---Electronics Model 250 Service Manual 5-23 Figure 5-14 Horizontal/Vertical I/O Diagram for Scan Reversal and Video Amplifier PCBs.
Page 79 - Horizontal Vertical Deflection PCB - Outputs; Vertical Adjustment Pots
Chapter 5---Electronics 5-24 Model 250 Service Manual Figure 5-15 Physical layout of the Horizontal/Vertical PCB (note the Vertical Size Adjustment Pots (Red-137, Grn-148, and Blu-160) on the lower right). Horizontal Vertical Deflection PCB - Outputs /SWEEP_OK - signal to the Video Amplifier PCB, de...
Page 80 - Horizontal Vertical Deflection PCB - Operation; The Horizontal Deflection Amplifier
Chapter 5---Electronics Model 250 Service Manual 5-25 Horizontal Vertical Deflection PCB - Operation The Horizontal Vertical Deflection PCB consists of a RGB horizontal deflectionamplifier and separate vertical deflection amplifiers. The Horizontal Deflection Amplifier The horizontal deflection ampl...
Page 81 - Horizontal Vertical Deflection PCB - Service Adjustments; Vertical Size Adjustment
Chapter 5---Electronics 5-26 Model 250 Service Manual the V_PARAB waveform. The output waveform V_RGB+ goes to the ScanReversal PCB and then drives the Vertical Deflection Yokes. The VerticalDeflection Yoke return signal to the Horizontal Vertical Deflection PCB isV_RGB-. Horizontal Vertical Deflect...
Page 82 - Red image needs vertical centering.
Chapter 5---Electronics Model 250 Service Manual 5-27 Figure 5-17 Red image needs vertical adjustment (increase). If Red is higher than Green at the top and bottom, or lower than Green atthe top and bottom, the Red image may not being centered correctly. Thiscan be corrected with the centering adjus...
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
Chapter 5---Electronics 5-28 Model 250 Service Manual Horizontal Vertical Deflection PCB - Remove and Replace The Horizontal/Vertical (H/V) Deflection PCB is located in the upper portion ofthe Electronic Module card cage. Tools Needed: #1 Pozi-drive Phillips-head screwdriver Parts Needed: Horizontal...
Page 84 - Convergence Deflection PCB - Inputs
Chapter 5---Electronics Model 250 Service Manual 5-29 ! Convergence output amplifiers for all colors and both horizontal andvertical axes ! Convergence enable and raster fill function ! ILA ® assembly driver circuitry with temperature compensation ! Phase locked loop for ILA ® assembly drivers ! IIC...
Page 87 - Convergence Deflection PCB - Operation; Bias command in the Factory Adj. Menu. The commands are
Chapter 5---Electronics 5-32 Model 250 Service Manual Figure 5-21 Physical layout of the Convergence/Deflection PCB. Convergence Deflection PCB - Operation The Convergence Deflection PCB performs four main functions. It generates thevertical deflection sawtooth waveform. It generates the square wave...
Page 88 - Convergence Deflection PCB - Remove and Replace
Chapter 5---Electronics Model 250 Service Manual 5-33 temperature of the green ILA ® increases, the bias is increased to maintain a constant ILA ® output. The Convergence Deflection PCB receives commands for x and y-axisconvergence from the System Controller PCB. The Convergence Deflection PCBhas a ...
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
Chapter 5---Electronics 5-34 Model 250 Service Manual 8. Reinstall the Convergence/Deflection PCB by lowering the right side infirst until it clears the electronic module edge, then lowering the left sidein. NOTE: It may be necessary to fit the top 2 fins of the heat sync over the electronic module ...
Page 90 - Scan Reversal PCB - Outputs; To Yokes
Chapter 5---Electronics Model 250 Service Manual 5-35 Y_RGB_YOKE (neg.) - bottom of red, green, and blue y-axis convergence yokes. RGB_LOCK (neg.) - interlock for red, green, and blue deflection yokes (5 Vwhen closed or 0 V when open). Scan Reversal PCB - Outputs H_LOCK (neg.) - Horizontal Interlock...
Page 93 - Scan Reversal PCB I/O Diagram for CRT Yokes.; Scan Reversal PCB - Operation
Chapter 5---Electronics 5-38 Model 250 Service Manual Figure 5-24 Scan Reversal PCB I/O Diagram for CRT Yokes. Scan Reversal PCB - Operation The Scan Reversal PCB has several functions. It provides an interface for scanreversal, and provides for horizontal width adjustment. The Scan Reversal PCBoutp...
Page 94 - and G
Chapter 5---Electronics Model 250 Service Manual 5-39 front/upright projection. This means the horizontal scan jumper is plugged intoJ100, the vertical scan jumper is plugged into J53, and the convergence jumper isplugged into J50. NOTE: Whenever the horizontal scan jumper is switched from front pro...
Page 95 - Scan Reversal PCB - Service Adjustments
Chapter 5---Electronics 5-40 Model 250 Service Manual Scan Reversal PCB - Service Adjustments Figure 5-25 Physical layout of the Scan Reversal PCB. Horizontal Size adjustment The Horizontal size adjustment must be performed after the Horizontal VerticalDeflection PCB is replaced. Tools Needed Delrin...
Page 96 - Replace the rear cover.; Do not attempt to switch jumpers while the
Chapter 5---Electronics Model 250 Service Manual 5-41 10. Recheck all Geometry and Convergence settings and readjust wherevernecessary. 11. Replace the rear cover. Front/Rear Projection Jumper Settings In the procedures below each of the jumpers mentioned have a specific purpose:J100 and J101 are th...
Page 97 - Orientation; The Model 250 Projector can not be
Chapter 5---Electronics 5-42 Model 250 Service Manual Table 5-1 Projection orientation jumper settings. Orientation Convergence. P50 goes to: Vertical. P53 goes to: Horizontal. P100 goes to: Front/Floor(Upright) J50 J53 J100 Front/Inverted* JA50 JA53 J101 Rear/Floor(Upright) JA50 J53 J101 Rear/Inver...
Page 98 - Scan Reversal PCB - Remove and Replace; Amplifier; Video Amplifier PCB - Main Functions
Chapter 5---Electronics Model 250 Service Manual 5-43 7. Power ON the projector and allow it to stabilize for a minimum of 15minutes. It is recommended that the projector be operating for a least onehour before performing shading adjustments. 8. When changing jumpers for floor or ceiling screen proj...
Page 99 - Video Amplifier PCB - Inputs; grid on CRTs from High Voltage Power Supply
Chapter 5---Electronics 5-44 Model 250 Service Manual Video Amplifier PCB - Inputs RGB_VIDEO - image pre-amp signals from the Video Processor PCB (about 0.5Vpp). RESTORE - image DC restorations pulse from Video Processor PCB, logic levelpositive going 4% duty cycle. BLANKING - Blanking signal, logic...
Page 100 - Video Amplifier PCB I/O Diagram
Chapter 5---Electronics Model 250 Service Manual 5-45 Figure 5-26 Video Amplifier PCB I/O Diagram
Page 101 - Video Amplifier PCB I/O Diagram for the Video Processor PCB and; Video Amplifier PCB - Outputs
Chapter 5---Electronics 5-46 Model 250 Service Manual Figure 5-27 Video Amplifier PCB I/O Diagram for the Video Processor PCB and CRTs. Video Amplifier PCB - Outputs RGB_BEAM - Cathode beam current sense lines (about 1 V per 100 µ A). RGB_CATHODE - image output signal to CRTs (about 40 Vpp with peak...
Page 102 - Video Amplifier PCB - Operation
Chapter 5---Electronics Model 250 Service Manual 5-47 RGB_HEAT (neg.) - negative side of CRT heater voltage (ground level). ARC_GND - CRT ground back to High Voltage Power Supply (CRT Protectionagainst arcing). /VA_OK - CRT Protection signal to the High Voltage Power Supply (low = good,high = bad). ...
Page 103 - Video Amplifier PCB - Remove and Replace
Chapter 5---Electronics 5-48 Model 250 Service Manual The Video Amplifier PCB detects all the necessary supply voltages (+80 V, +15V, and the +6.2 V) for the CRT and includes that as part of the /VA_OK signal. Ifany of the supply voltages is not present, /VA_OK goes high, again shutting downthe G1 a...
Page 104 - The connections at the rear of the CRT; It may be helpful to perform this step with a partner-one person to
Chapter 5---Electronics Model 250 Service Manual 5-49 5. Remove the green CRT by loosening the green CRT Holder Ring (seeFigure 5-29). Perform this step with the CRT Socket Connector stillconnected to the Green CRT and the ground wire still connected from theCRT/Yoke Assembly to the CRT Socket Conne...
Page 105 - Observe that each of the three Focus cables (large, red wires that; Reinstall in the reverse order from above.
Chapter 5---Electronics 5-50 Model 250 Service Manual 12. Disconnect the three Focus cables that run from the CRT SocketConnectors to the Focus connectors on the HVPS. NOTE: Observe that each of the three Focus cables (large, red wires that run from each CRT Socket Connector to the Focus connectors ...
Page 107 - CRT/Yoke Assemblies - Service Adjustments
Chapter 5---Electronics 5-52 Model 250 Service Manual Image - image light that passes through Relay Lens and focuses on photosensitivelayer on input side of ILA ® . CRT/Yoke Assemblies - Operation The CRTs receive image signals that come from the VICs to the Video ProcessorPCB, to the Video Amplifie...
Page 110 - The CRT Thumbscrew is used more as a handle to move the CRT
Chapter 5---Electronics Model 250 Service Manual 5-55 5. View the color for the CRT that requires rotation. Hide the other twocolors. 6. In the Geometry menu, set “Reg Enable” to off by unchecking the box.Unchecking the Reg Enable box temporarily disables any convergencecorrections that have been pe...
Page 112 - Handle the CRT/Yoke Assemblies with; The CRT Holder Ring should be only hand-tight. If it is not
Chapter 5---Electronics Model 250 Service Manual 5-57 CRT/Yoke Assemblies - Remove and Replace Three CRT/Yoke Assemblies are located in the CRT Assembly area below thecard cage (see Figure 5-30). WARNING!!! Handle the CRT/Yoke Assemblies with extreme caution. If they are dropped, they can implode an...
Page 113 - For the Green CRT/Yoke Assembly only, it is best to perform
Chapter 5---Electronics 5-58 Model 250 Service Manual NOTE: For the Green CRT/Yoke Assembly only, it is best to perform Step 10 with the CRT socket connector still connected to the Green CRTand the ground wire still connected from the CRT to the socket connector.Because the Green CRT socket connecto...
Page 114 - Standard RGBHV VIC; RGBHV VIC - Main Functions; Interface for Red, Green, and Blue image inputs
Chapter 5---Electronics Model 250 Service Manual 5-59 ! YPbPr (Optional) ! Quad Standard Decoder (Optional) ! Quad Standard Decoder/Line Doubler (Optional) The are three VICs slots on the Model 250, however the 4-Input RGBHV, and theQuad Standard Decoder/Line Doubler require two slots. Standard RGBH...
Page 115 - RGBHV VIC - Operation
Chapter 5---Electronics 5-60 Model 250 Service Manual RGBHV VIC - Inputs R - red image from source input (0.7-1.0 Vpp). G - green image from source input (0.7-1.0 Vpp). B - blue image from source input (0.7-1.0 Vpp). H - horizontal sync from source input V - vertical sync from source input +15 V - (...
Page 116 - Graphics Enhancer Plus RGBHV VIC; Grahics Enhancer Plus RGBHV VIC - Main Functions
Chapter 5---Electronics Model 250 Service Manual 5-61 Parts Needed RGBHV VIC p/n 102597 To remove the RGBHV VIC: 1. Power off the projector by IR Remote or PC, and allow the cooling fans torun until they shut off. 2. Turn the AC Circuit Breaker to the OFF position and unplug the ACPower Cord. 3. It ...
Page 117 - Graphics Enhancer Plus VIC - Inputs
Chapter 5---Electronics 5-62 Model 250 Service Manual Figure 5-34 Graphics Enhancer Plus faceplate. Graphics Enhancer Plus VIC - Inputs R - red image from source input (0.7-1.0 Vpp). G - green image from source input (0.7-1.0 Vpp). B - blue image from source input (0.7-1.0 Vpp). H - horizontal sync ...
Page 118 - Graphics Enhancer Plus VIC - Operation
Chapter 5---Electronics Model 250 Service Manual 5-63 Graphics Enhancer Plus VIC - Operation The RGBHV VIC receives the separate red, green, blue image inputs andhorizontal, and vertical sync inputs from the source input device. The imagesignals go to a image enhancement signal processor that peaks ...
Page 120 - IIC CLK - IIC clock line
Chapter 5---Electronics Model 250 Service Manual 5-65 IIC CLK - IIC clock line IIC DATA - IIC data line IIC SINT - IIC interrupt line Figure 5-36 4-Input (Quad) RGBHV VIC.
Page 122 - YPbPr VIC; YPbPr VIC - Main Functions
Chapter 5---Electronics Model 250 Service Manual 5-67 YPbPr VIC This decoder video input card (YPbPr_VIC) contains three BNC input connectorsthat can be used for two different inputs, YPbPr or GBR. The YPbPr PCBconverts these component signals to RGB type image signals. YPbPr VIC - Main Functions ! ...
Page 123 - YPbPr Inputs; YPbPr VIC - Operation
Chapter 5---Electronics 5-68 Model 250 Service Manual Figure 5-38 YPbPr VIC faceplate. YPbPr VIC - Inputs YPbPr Inputs Y - green image input with composite horizontal and vertical sync (0.7-1 Vpp) Pb - blue image input for YPbPr (0.7-1 Vpp) Pr - red image input for YPbPr (0.7-1 Vpp) GBR Inputs Grn -...
Page 124 - YPbPr VIC - Service Adjustments
Chapter 5---Electronics Model 250 Service Manual 5-69 interface. An operator selects the VIC and input in the Channels Menu (seesection 4-6 in the User’s Guide). The YPbPr VIC strips the sync pulses that are combined with the green imagesignal (Y in YPbPr mode) and sends them to the Video Processor ...
Page 125 - Quad Standard Decoder VIC; Quad Standard Decoder VIC - Main Functions
Chapter 5---Electronics 5-70 Model 250 Service Manual Quad Standard Decoder VIC The Quad Standard Decoder VIC provides an interface for composite andS-Video formats input. It contains three BNC input connectors, one forComposite Video and two for S-Video (luminance and chrominance). Thisdecoder VIC ...
Page 126 - Quad Standard Decoder VIC - Inputs; Quad Standard Decoder VIC - Outputs
Chapter 5---Electronics Model 250 Service Manual 5-71 Quad Standard Decoder VIC - Inputs Comp - input for Composite image signal includes sync pulses (.07-1 Vpp) Yin - input for Luminance or brightness information of S-image (0.7-1 Vpp) Cin - input for Chrominance or color information of S-image (0....
Page 127 - Quad Standard Decoder VIC - Service Adjustments; Quad Standard Decoder/Line Doubler VIC
Chapter 5---Electronics 5-72 Model 250 Service Manual when the S-image input is selected. Only one LED will be illuminated at onetime. Neither LEDs will be illuminated when the Quad Standard Decoder VIC isnot selected as the input to projector. Quad Standard Decoder VIC - Service Adjustments There a...
Page 128 - Quad Standard Decoder/Line Doubler VIC faceplate with blank
Chapter 5---Electronics Model 250 Service Manual 5-73 installed in the #2 or 3 VIC slot (it will not fit into the #1 slot), a blank face platemust be installed above it. The blank faceplate is not included with the QuadStandard Decoder/Line Doubler VIC unless it is installed at the factory. The part...
Page 129 - Troubleshooting on the Backplane PCB
Chapter 5---Electronics 5-74 Model 250 Service Manual 5.12 Backplane PCB The Backplane PCB is the spine of the Electronics Module. Every majorelectronic component in the Model 250 projector connects to and through theBackplane PCB. It is hidden in the inside of the Electronics Module (see Figure5-2)...
Page 133 - Items; Do not leave either cover in the tilted up
Chapter 6---Miscellaneous Items Model 250 Service Manual 6-1 6.0 Miscellaneous Items Contents 6.1 Projector Covers ........................................................................................... 6-16.2 Electronics Module Tilt-up ..............................................................
Page 134 - Module
Chapter 6---Miscellaneous Items 6-2 Model 250 Service Manual 5. When the Latch Levers are inserted into the holding slots, lift the coveroff. Be careful not to brush against any of the internal components of theprojector when removing the cover. If any undue resistance is felt, stop tolocate the sou...
Page 135 - Electronics Module hinge and locking mechanism.
Chapter 6---Miscellaneous Items Model 250 Service Manual 6-3 Figure 6-1 Electronics Module hinge and locking mechanism. 6.3 Ventilation Adequate cooling is a major consideration for the Model 250 projector. There arethirteen cooling fans (including the Arc Lamp blower) in this projector. ! 4 fans in...
Page 136 - Filters; EMI Shield with Low Voltage Power Supply and Arc Lamp Power
Chapter 6---Miscellaneous Items 6-4 Model 250 Service Manual 6.4 Air Filters There are three polyurethane air filters in the Model 250. Air filters should becleaned whenever necessary. In extremely dusty or dirty conditions, the filtersshould be cleaned more frequently. Remove the filters and vacuum...
Page 137 - Assemblies and Mirrors
Chapter 6---Miscellaneous Items Model 250 Service Manual 6-5 The EMI Shield is a metal plate located in front of the Low Voltage PowerSupply and the Arc Lamp Power Supply. It must be removed before removingeither of these power supplies. Be sure to replace the EMI Shield after replacingeither the Lo...
Page 139 - ! Before performing procedures in this chapter,; review the chapter on Safety at the beginning of this manual.; When performing troubleshooting
Chapter 7---Troubleshooting Model 250 Service Manual 7-1 7.0 Troubleshooting Contents 7.1 Safety............................................................................................................ 7-17.2 LEDs.......................................................................................
Page 140 - When referring to the left or right in this chapter, it is; Backpanel LEDs
Chapter 7---Troubleshooting 7-2 Model 250 Service Manual Left/Right Orientation: When referring to the left or right in this chapter, it is with reference to standing at the rear of the projector, facing the screen . Connectors on subassemblies and PCBs have tabs that must be released firstbefore pu...
Page 141 - Figure; Rear Panel layout
Chapter 7---Troubleshooting Model 250 Service Manual 7-3 Figure 7-1 Rear Panel layout Control Out - The Control Out terminal is another RS232 port similar to theTerminal In port except that it can not be used to Import/Export setup data. Tethered Remote Jack - The Model 250 projector is shipped with...
Page 142 - Dip Switch Block on System Controller PCB.
Chapter 7---Troubleshooting 7-4 Model 250 Service Manual Figure 7-2 Dip Switch Block on System Controller PCB. Reset Switch - The Reset Switch resets the CPU if the projector locks up and doesnot respond to an IR Remote, PC or Laptop computer. If the rear panel is in place,the CPU can also be reset ...
Page 143 - Video Processor PCB LEDs; Video Processor Test Points and LEDs; Video Processor - Test Points
Chapter 7---Troubleshooting Model 250 Service Manual 7-5 Video Processor PCB LEDs Figure 7-4 Video Processor Test Points and LEDs . Video Processor - Test Points The test points on the Video Processor PCB are visible and accessible from theleft side of the Electronics Module when the rear projector ...
Page 144 - Ground - The Gnd test point is for reference ground.; Video Processor - LEDs
Chapter 7---Troubleshooting 7-6 Model 250 Service Manual Sync - There are three sync test points: H sync for the horizontal sync pulse, Vsync for the vertical sync pulse, and G sync, which is a combination of thehorizontal and vertical sync pulses that are carried with the green image signal. Extern...
Page 145 - Raster Timing Generator PCB LEDs; Raster Timing Generator LEDs.
Chapter 7---Troubleshooting Model 250 Service Manual 7-7 Raster Timing Generator PCB LEDs Figure 7-6 Raster Timing Generator LEDs.
Page 146 - Band LEDs
Chapter 7---Troubleshooting 7-8 Model 250 Service Manual Raster Timing Generator PCB LEDs Band LEDs The range horizontal scan frequencies accepted by the Model 250 projector isdivided into four “bands”. The four LEDs (A, B, C, & D) toward the front of theprojector on the Raster Timing Generator ...
Page 147 - Convergence Deflection PCB LED; Convergence Deflection PCB LED.
Chapter 7---Troubleshooting Model 250 Service Manual 7-9 Convergence Deflection PCB LED Figure 7-7 Convergence Deflection PCB LED. The Convergence Deflection PCB has only one LED. It illuminates green whenpower (±15 V) is present on the PCB.
Page 148 - Video Amplifier PCB LED; Video Amplifier PCB LED.
Chapter 7---Troubleshooting 7-10 Model 250 Service Manual Video Amplifier PCB LED Figure 7-8 Video Amplifier PCB LED. The VA_OK LED on the Video Amplifier PCB is illuminated green when all theCRT deflection circuits are operating properly (/DEFL_OK), the supply voltages(±15 V, +6.2 V, and +80 V) are...
Page 149 - Backplane PCB LEDs; Backplane PCB LEDs on right side (exposed side)of PCB
Chapter 7---Troubleshooting Model 250 Service Manual 7-11 Backplane PCB LEDs Figure 7-9 Backplane PCB LEDs on right side (exposed side)of PCB . The Backplane has two status LEDs, the /LV_OK signal from the Low VoltagePower Supply, and the /HV_OK signal from the High Voltage Power Supply. TheBackplan...
Page 150 - Command ON Timing; POWER ON and POWER OFF command timing diagram.
Chapter 7---Troubleshooting 7-12 Model 250 Service Manual 7.3 Diagrams Command ON Timing Figure 7-10 POWER ON and POWER OFF command timing diagram. When the AC Circuit Breaker is powered ON, the Low Voltage Power Supplygenerates a +5.1 V Standby voltage that goes to the System Controller PCB topower...
Page 152 - Image Path; RGB Image path from VIC to CRT.
Chapter 7---Troubleshooting 7-14 Model 250 Service Manual Image Path Figure 7-11 RGB Image path from VIC to CRT. The image signals can be in the form of separate red, green and blue componentsignals with separate horizontal and vertical sync signals or they can be acomposite image signal with all th...
Page 153 - Deflection Path; CRT Deflection path from Raster Timing Generator PCB.
Chapter 7---Troubleshooting Model 250 Service Manual 7-15 Deflection Path Figure 7-12 CRT Deflection path from Raster Timing Generator PCB. The Raster Timing Generator PCB receives the horizontal and vertical syncpulses from the Video Processor PCB, and uses a Phase Locked Loop circuit tolock to the...
Page 155 - CRT Deflection path between Horiz/Vert Deflection PCB,
Chapter 7---Troubleshooting Model 250 Service Manual 7-17 Figure 7-13 CRT Deflection path between Horiz/Vert Deflection PCB, Convergence Deflection PCB and Scan Reversal PCB.
Page 156 - CRT Deflection path between the Scan Reversal PCB and CRT.
Chapter 7---Troubleshooting 7-18 Model 250 Service Manual Figure 7-14 CRT Deflection path between the Scan Reversal PCB and CRT.
Page 157 - CRT Protection; CRT Protection path
Chapter 7---Troubleshooting Model 250 Service Manual 7-19 CRT Protection Figure 7-15 CRT Protection path The CRT Protection circuit is designed to protect the CRTs in case any of theCRTs is not receiving a horizontal or vertical deflection waveform. If there are nodeflection waveforms, the electron ...
Page 158 - Yoke Connector Detection
Chapter 7---Troubleshooting 7-20 Model 250 Service Manual Amplifier PCB the /SWEEP_OK becomes the /VA_OK signal and checks thesupply voltages such as +15 V, +6.2 V and +80 V. The /VA_OK LEDilluminates (see Video Amplifier PCB LED) if the supply voltages are present andthe /SWEEP_OK is low. The /VA_O...
Page 159 - CRT Protection path between the Scan Reversal PCB and CRT.
Chapter 7---Troubleshooting Model 250 Service Manual 7-21 Figure 7-16 CRT Protection path between the Scan Reversal PCB and CRT.
Page 160 - Codes
Chapter 7---Troubleshooting 7-22 Model 250 Service Manual 7.4 Error Codes For certain errors that may occur in the Model 250 Projector the softwareprovides 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 ...
Page 162 - Copy the three lines that appear on the screen.
Chapter 7---Troubleshooting 7-24 Model 250 Service Manual 4.17 “VIC1 Board Not OK” /VIC_OK is High (BAD) on VIC Slot 1. 4.18 “VIC 2 Board Not Ok” /VIC_OK is High (BAD) on VIC Slot 2 4.19 “VIC3 Board Not OK” /VIC_OK is High (BAD) on VIC Slot 3 4.20 “VIC1 Invalid Type” Software does not support VIC_ID...
Page 163 - Guide; Problem
Chapter 7---Troubleshooting Model 250 Service Manual 7-25 7.5 Troubleshooting Guide Table 7-3 lists some common projector problems, what to check when problemsoccur, and offers possible solutions. It indicates the section in this Service Manualthat provides some related information on the problem. I...
Page 168 - Software and Protocol; To perform software upgrade:
Chapter 8---Software and Protocol Model 250 Service Manual 8-1 8.0 Software and Protocol Contents 8.1 Software Updating........................................................................................ 8-18.2 Importing/Exporting ....................................................................
Page 170 - If normal software starts, see Step 9 to reenter Boot Manager.)
Chapter 8---Software and Protocol Model 250 Service Manual 8-3 ***WARNING: IMPROPER USE MAY MAKE THIS SYSTEM UNBOOTABLE*** (This warning relates to the Flash Memory updating that occurs in Step 11D. Do not turn projector power off while theFlash Memory is updating) Memory buffer reset to 0xff Begin ...
Page 171 - 2A. To update the System Software from the Boot Manager prompt:
Chapter 8---Software and Protocol 8-4 Model 250 Service Manual Boot Manager Ver y.y.0 (Service Mode Startup) Copyright (c) 1994-1996 Hughes-JVC Technology Command: _ 12A. To update the System Software from the Boot Manager prompt: 12B. Type in the command “loadsys” at the prompt. The following shoul...
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
Chapter 8---Software and Protocol Model 250 Service Manual 8-5 The software update is complete. To restart the projector, type in the “sys” or“reboot” command and press Enter. The projector will now restart with theupdated System Software. 8.2 Importing/Exporting Configuration Data Export / Import P...
Page 173 - Exporting; Select OK with mouse or press Enter key (dialog will be removed); ENTER; key to start export download. NOTE: Some VT100
Chapter 8---Software and Protocol 8-6 Model 250 Service Manual Exporting 1. Make sure the Windows TERMINAL program is configured forSOFTWARE FLOW CONTROL (XON/XOFF). A corrupt Export filewill result if SW flow control is not used. 2. Choose the directory and filename for saving the Export Data. TheW...
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.
Chapter 8---Software and Protocol Model 250 Service Manual 8-7 . END A similar message is displayed on the projector screen : ================================= | Export Configuration | | EXPORT COMPLETE | | -> STOP Host Download | | -> THEN Press ESC | ================================= 10. Win...
Page 175 - At successful end, TERMINAL will remove the bottom line.
Chapter 8---Software and Protocol 8-8 Model 250 Service Manual | Import Configuration | | Start SEND TEXT Upload from | | Host on Serial PORT A | | -To Abort: | | ->Stop Host Upload, | | ->THEN Press ESC to Abort | ================================= 6. Windows TERMINAL: Transfers + Send Text Fi...
Page 176 - Model 250 Menu will display:; Windows TERMINAL: FIRST press STOP to end the Host Upload; operation and return; Null Modem Adapter
Chapter 8---Software and Protocol Model 250 Service Manual 8-9 FINALLY, press ESC to exit the projector Import operation and return tothe Maintenance Menu. There is a 10 second pause before the screen is redrawn. 9. DATA TRANSFER ERROR (Example) Model 250 Menu will display: =========================...
Page 177 - Terminals and Communication Protocols; Terminals; From Windows Program Manager, select TERMINAL then SETTINGS.; Terminal Preferences; Terminal preference settings
Chapter 8---Software and Protocol 8-10 Model 250 Service Manual 8.3 Terminals and Communication Protocols Terminals The projector can be controlled by a VT-100 terminal. If a VT-100 is notavailable, a PC with Windows 3.1 or ProComm for DOS can emulate a VT-100.Table 8-1 shows the equivalent commands...
Page 178 - Communications Protocol
Chapter 8---Software and Protocol Model 250 Service Manual 8-11 Communications Protocol Select SETTINGS using the menu bar, then select COMMUNICATIONS. Set thefollowing communications parameters and modes. Table 8-2 Communications settings Baud Rate 9600 Stop Bits 1 Data Bits 8 Flow Control Xon/Xoff...
Page 182 - List
Chapter 9---Parts List Model 250 Service Manual 9-1 9.0 Parts List Contents 9.1 Replacement Parts List ................................................................................. 9-19.2 Spares ........................................................................................................
Page 186 - Glossary of Terms
Glossary Model 250 Service Manual A-1 Glossary of Terms Amorphous Without definite form; not crystallized. Arc Lamp The high intensity light source in the Model 250projector. The Xenon Arc Lamp operates at hightemperatures (160° to 200°) and producesdangerously intensive light with hazardous levelso...
Page 187 - Reverses the image projection for front or rear
Glossary A-2 Model 250 Service Manual Field One half of a complete video frame. Odd lines inone field and even lines in another make up oneframe. Frame One complete TV picture or screen ofinformation. It is composed of two fields and hasa total of 525 scanning lines in NTSCtransmission. Horizontal S...
Page 188 - An undesirable electrical interference of a signal.
Glossary Model 250 Service Manual A-3 Lumen A unit of measure of the flow, or rate of emission,of light measured with a Light Meter. Anordinary wax candle generates 13 lumens while a100-watt bulb generates 1,200 lumens. Luminance Abbreviated as "Y." The portion of the YPbPrand S-image signal...
Page 189 - One horizontal line in a graphics frame.
Glossary A-4 Model 250 Service Manual S-Video An image signal that has the luminance (Y)information separated from chrominance (C)information. Saturated Color 1) A color as far from white, black or gray as itcan be (i.e., vermilion rather than pink). 2) Adisplay misadjustment that results in unnatur...
Page 190 - Reverses the image vertically for use with
Glossary Model 250 Service Manual A-5 alternating white and black horizontal lines thatcan be counted from the top of the picture to thebottom. Vertical Scan Frequency The number of times per second a display imageis written or refreshed. Vertical Scan Reverses the image vertically for use with Reve...
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