Hughes Jvc 220 Projector Service Manual

							Chapter 6---Parts List 
6-2   Series 220 Service Manual 
 
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 104348 
Remote Control, Technician 104019 
Shipping Case, Hardigg 101617 
Yoke Assembly, CRT 103467 
  
						

							  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. This paper describes 
the procedures for an IBM-PC running the Windows 3.1 OS. We will use the Windows “TERMINAL” 
application for communication with the projector. Other Terminal emulation programs can be used 
(ProComm, .), but all testing has been done with the TERMINAL application. 
 
Note 1:  The TERMINAL application setup is the same as for controlling the projector via an ANSI 
TERMINAL (see Model 220 User’s Guide, Section 4.11). 
 
Note 2:  Export/Import can be performed on either Port A or Port B.  The Port must be configured for 
ANSI Terminal. Port A speed is determined by DIP SWITCH #4 on the System Controller board.  DOWN 
is 9600 baud, UP is 19200 Baud.  Port B can be configured for 2400, 9600 (default), or 19200 through the 
Comm Setup Menu.  If both Port A and Port B are ANSI Terminals, PORT A must be used for 
Export/Import, so to use Port B, set Port A Device = None or Switcher, Port B Device = ANSI. 
 
Remember to Power Off (Control+P) and HW RESET (Push RESET button -figure 5-1 in Service 
Manual- or Circuit Breaker-on rear panel) after changing any configuration parameters. 
 
WARNING:  If you use 19200 Baud, your computer must have a 16550 UART installed on the Comm 
Port. An unbuffered  8550 UART will lose data during EXPORT. This data loss cannot be detected until a 
later IMPORT is attempted. Use 9600 if you are not sure. In all cases use  SOFTWARE FLOW 
CONTROL (XON/XOFF). 
 
WARNING:  Laptop computer users  must disable Advance Power Management (APM) during an Export. 
APM power pulling causes loss of data. 
EXPORT 
 
1. Make sure the Windows TERMINAL program is configured for SOFTWARE FLOW CONTROL 
(XON/XOFF). A corrupt Export file will result if SW flow control is not used. 
2. Choose the directory and filename for saving the Export Data. The Windows TERMINAL: 
Transfers: Receive Text File... dialog box will default to the c:\windows directory and no file.   
Create a directory (like \TEMP) (or have an existing one in mind) before starting the export 
process. 
3. Model 220 Menu:   7. System + 5. Maintenance + 5. Export 
 ================================= 
 |     Export Configuration      | 
 | Start RECEIVE TEXT Download   | 
 | to Host on Serial PORT A      | 
 |                               | 
 |       to Continue      | 
 |       < ESC> to Cancel        | 
 ================================= 
 
4. Windows TERMINAL:  Transfers + Receive Text File.... 
 
4.1. Directories - set directory to desired download directory (C:\TEMP) 
 
4.2. File Name: - Type desired File Name (for example:  export1.txt) 
 
Model 220 Service Manual  A-1  
						

							Import/Export   
4.3. Select OK with mouse or press Enter key (dialog will be removed) 
 
4.4. Verify TERMINAL screen shows status line at bottom:  
 Stop,  Pause, Bytes: 0,  Receiving: EXPORT1.TXT 
 
5. Model 220 Menu: 
 
 Press ENTER key to start export download. NOTE: Some VT100 Emulator programs (ProComm) 
will send the ENTER automatically when step 4.3 above is performed. Expect 10 minutes to 
export 20 sources (500,000 bytes) at 9600 baud). 
 
 Data Transfer will begin and continue until all source, channel, channel-source combination, and 
system data has been exported.  The following dialog is displayed on the projector screen during 
the transfer. 
 
 ================================= 
 |     Export Configuration      | 
 |  EXPORT IN PROGRESS ... wait  | 
 | - Press ESC to Abort          | 
 ================================= 
 
 The following message is sent at the end of the export data. 
 
 ########################## 
 # Export Complete        # 
 # STOP Host Download Now # 
 # Then, Press ESC        # 
 ########################## 
 .END 
 
 A similar message is displayed on the projector screen : 
 
=================================  
 |     Export Configuration      | 
 | EXPORT COMPLETE               | 
 | -> STOP Host Download         | 
 | -> THEN Press ESC             | 
 ================================= 
 
6. Windows TERMINAL: 
 
Select the Windows TERMINAL STOP button with the mouse to end the Receive Text File... 
transfer. 
 
 
7. Model 220 Menu: 
 
Press Esc to exit the projector Export operation and return to the Maintenance Menu. 
 
 
 
IMPORT 
 
1. 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! 
  
A-2  Model 220  Service Manual  
						

							  Import/Export 
2. Import will alter all projector setup data.  Prior to starting, several warnings are displayed to 
prevent unintentional loss of setup data. 
 
3. Model 220 Menu:   7. System + 5. Maintenance + 6. Import 
 ================================= 
 |      WARNING   
 |  Importing New Configuration  | 
 |  ALL SETUP DATA WILL BE  
|  CHANGED!                     | 
 |            |                    
 |       to Continue      | 
 |       < ESC> to Cancel        | 
 ================================= 
 
4. Press ENTER to continue with the Import. 
 ================================= 
 |     Import Configuration    | 
 |  Old Configuration will be     | 
 |  restored if import is Aborted | 
 |                                | 
 |       to Continue       | 
 |       < ESC> to Cancel         | 
 ================================= 
5. Press ENTER to continue with the Import. 
 ================================= 
 |     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 File.... 
 
6.1. Directories - set directory to desired upload directory (C:\TEMP) 
 
6.2. File Name: - Type desired File Name (for example: import1.txt) 
 
6.3. Select OK with mouse or press Enter key (upload begins) 
 
6.4. Verify TERMINAL screen shows status line at bottom:  
 Stop,  Pause, “% complete bar”, Sending: EXPORT1.TXT 
 
6.5 Data transfer will continue until complete or an arror occurs or the User Aborts:  
 Expect 10 minutes to import 20 sources (500,000 bytes) at 9600 baud. 
 
6.6 At successful end, TERMINAL will remove the bottom line. 
 
7. 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  | 
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							Import/Export   
A-4  Model 220  Service Manual 
 |                               | 
 | - Press ESC to Continue       | 
 ================================= 
  
 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. 
  
8.  USER ABORT: 
   
 Windows TERMINAL:  FIRST press STOP to end the Host Upload transfer. 
   
 Model 220 Menu:  THEN press ESC  to abort the projector Import operation. 
  
 ================================= 
 |     Import Failed              | 
 |  IMPORT ABORTED BY USER       | 
 |    Old Data was Restored.     | 
 | - STOP Host SEND DATA,        | 
 |   THEN Press ESC              | 
 ================================= 
  
 FINALLY,  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. 
   
9.  DATA TRANSFER ERROR (Example) 
   
 Model 220 Menu will display: 
  
 ================================= 
 |     Import Failed              | 
 |  Bad EXPORT File Format       | 
 |   Old Data was Restored.      | 
 | -> STOP Host SEND DATA,       | 
 | -> THEN Press ESC             | 
 ================================= 
  
 9.1. 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. 
  
						

							Glossary 
   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. 
Aspect Ratio The ratio of the picture width to picture height. 
The standard U.S. television aspect ratio is four 
units wide to three units high (4:3). High Definition 
Television (HDTV) is 16:9. 
Bandwidth The transmission or reception capacity of a 
computer or communications channel measured 
in bits per second in digital and in Hertz in 
communications. Bandwidth is the difference 
between the lowest and highest frequencies 
transmitted or received. Wider bandwidth 
provides more information or picture detail 
capability. 
Chrominance Abbreviated as C.  Color information signal or 
signals. 
Cold Mirror Mirror that absorbs infrared light so that its 
reflection contains only cold light that does not 
transmit appreciable heat.  As a result of this 
absorption of infrared heat radiation, cold 
mirrors get quite hot. 
CRT (Cathode Ray Tube) The vacuum tube used as a display screen in 
video terminals or television sets.  Commonly 
called the picture tube. 
Dichroic Mirrors The white light of the xenon arc lamp is separated 
into red, green and blue by means of dichroic 
mirrors which reflect only one color and pass all 
others. 
Field One half of a complete video frame. Odd lines in 
one field and even lines in another make up one 
frame.  
Frame One complete TV picture or screen of 
information. It is composed of two fields and has 
Model 220 Service Manual  B-1  
						

							Glossary 
a total of 525 scanning lines in NTSC 
transmission.  
Horizontal Scan Reverses the image projection for front or rear  
Reversal Jumper projection. Located on the Horizontal Deflection 
Board. 
Horizontal Size Coils Adjusting coils on the Scan Reversal Board. Used 
to adjust the horizontal size (width). 
Hot Spot The Arc Lamp’s brightest area on the screen. 
Used to align and focus the Arc Lamp. 
Hue Also referred to as tint.  A specific color such a 
blue, pink or aqua.  Hue or tint control on a 
display device adjusts red/green balance. 
Ignitor Provides a momentary high voltage to excite the 
gases in the Xenon Arc Lamp to ignite. 
Image Light Amplifier  A device that uses low-intensity images to phase 
ILA® modulate a high-intensity light through a liquid  
 crystal layer. It is a key component in 
 producing very bright, high resolution images 
 from Hughes-JVC large-screen projectors. 
Image Mirror Directs the blue and red images toward the 
 Combining Prism. 
Interlacing The technique that refreshes a display screen by 
alternately displaying all the odd lines (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. 
Laser Power Supply Provides boost voltage through a spark gap to the 
Ignitor. 
Lumen A unit of measure of the flow, or rate of emission, 
of light.  An ordinary wax candle generates 13 
lumens while a 100 watt bulb generates 1,200 
lumens. 
B-2 Model 220 Service Manual  
						

							Glossary 
Luminance Abbreviated as Y.  The portion of the signal that 
contains the black and white information, which 
affects brightness. 
Noise An undesirable electrical interference of a signal.  
Overscanning Displaying less than the complete area of an 
image to a viewer (i.e., scanning beyond the 
visible area).  All TV sets are overscanned at 
least slightly, so that viewers do not see blanking. 
Raster The area illuminated by the scan lines on a CRT. 
Resolution The degree of sharpness of a displayed or printed 
character or image;  the amount of detail in a 
picture.  On a display screen, resolution is 
expressed as the number of horizontal dots 
(columns) by the number of vertical lines (rows).  
For example, a 680 x 400 resolution means 680 
dots across each of 400 lines. 
Retrace The blanked-out line traced by the scanning 
beam of a picture tube as it travels from the end 
of any horizontal line to the beginning of either 
the next horizontal line or field.  The beam is 
turned off during retrace. 
RGB (Red, Green, Blue) Refers to the method of recording and generating 
colors in a video system.  On a television or color 
monitor, colors are displayed as varying 
intensities of red, green and blue dots.  When 
red, green and blue are all turned on high, white 
is produced.  When all dots are turned off, the 
base color of the screen appears. 
Rollbar Assembly Assembly where the front and rear cover are 
hinged to. Used to hold covers in place. 
S-VHS A high band video recording process for VHS that 
increases picture quality and resolution capability. 
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  B-3  
						

							Glossary 
Saturated Color 1)  A color as far from white, black or gray as it 
can be (i.e., vermilion rather than pink).  2)  A 
display misadjustment that results in unnaturally 
bright colors. 
Scan To scan is to move across a picture frame a line 
at a time, either to detect the image, as in an 
analog or digital camera, or to refresh a CRT-
based video screen. 
Scan Line One of many horizontal lines in a graphics frame. 
Scan Rate The frequency of line scanning for a monitor or 
projector. 
Synchronization Also called sync for short.  Working together.  At 
the same time, horizontal and vertical sync 
signals from the signal source control the 
monitors scan circuits to properly time the lines 
and frames of a picture. 
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. 
Throw Distance to the screen from the projector. 
Underscan Decrease raster size H and V so that all four 
edges of the picture are visible on the display. 
Vertical Height Pots Potentiometers located on the Horizontal/Vertical 
Deflection Board. Used to adjust Vertical height. 
Vertical Resolution The amount of detail that can be perceived in the 
vertical direction;  the maximum number of 
alternating white and black horizontal lines that 
can be counted from the top of the picture to the 
bottom. 
Vertical Scan Frequency The vertical scan frequency of the input signal. 
(V-Freq) 
Vertical Scan Reverses the image vertically for use with ceiling  
Reversal Jumper displays or mirror-bounced displays. Located on 
the Scan Reversal Board. 
Vertical Synchronization The number of times per second a frame is  
Frequency transmitted to a video display screen. 
Xenon Arc Lamp See Arc Lamp. 
B-4 Model 220 Service Manual  
						

							Glossary 
Model 220 Service Manual  B-5