Hughes Jvc 220 Projector Service Manual

							SERVICE 
MANUAL 
Model 220 Projector 
  
						

							 
DECLARATION OF CONFORMITY  
PER ISO/IEC GUIDE 22 AND EN 45014 
  
Manufacturer: Hughes JVC 
   2310 Camino Vida Roble 
   Carlsbad, Ca 92009 
   USA 
Hughes-JVC declares that this product conforms to the following Product \
Specifications (Directive/Standard): 
 
 Safety: EN 60950 
   IEC 950 (1992) 
 
 EMC:  EN 55022 (1988) / CISPR-22 (1986) Class A   
   EN 50082-1 (1992) / IEC 801-2(1991) 
   EN 50082-1 (1992) / IEC 801-3(1984)  
   EN 50082-1 (1992) / IEC 801-4(1988) 
    
   ANSI C63.4-1992, FCC, Part 15, Class A 
 
In addition, the above product complies with the requirements of the Low 
Voltage Directive 73/23 EEC and the EMC Directive 89/336/EEC. 
 
104346 First Edition November 1996 
  
  
  
 
 
Confidential and proprietary information.  
© Copyright 1993 by Hughes-JVC Technology Corporation.  
All worldwide rights reserved.  
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. 
ILA® is a registered trademark of Hughes-JVC Technology Corporation. 
 
 
 Model 220 Service Manual ii  
						

							 
Table of Contents 
 
Safety Information........................................................................\
..........v 
Chapter 1  Introduction 
1.1   Safety........................................................................\
................................1-1 
1.2   Updates........................................................................\
.............................1-1 
1.3   Tool List........................................................................\
.............................1-1 
1.4   Acronyms Used in Manual...........................................\
..............................1-2 
Chapter 2  Functional Description 
2.1   Introduction........................................................................\
........................2-1 
2.2   Optical Section........................................................................\
..................2-2 
2.3   Electronics System........................................................................\
............2-7 
2.4   Image Light Amplifier Technology.............................................................2-61 
Chapter 3  Service Adjustments 
3.1   Arc Lamp Focus and Alignment................................................................3-1 
3.2   Arc Lamp Current Setting........................................................................\
..3-5 
3.3   Electronic Module Tilt-Up........................................................................\
..3-5 
3.4   ILA® Back Focus........................................................................\
...............3-6 
3.5   CRT Mechanical Focus........................................................................\
.....3-7 
3.6   CRT Rotation........................................................................\
.....................3-9 
3.7   CRT Electronic Focus........................................................................\
.......3-9 
3.8   ILA® Overlap........................................................................\
.....................3-10 
3.9   Jumper Settings (Front/Rear or Inverted Vertical).....................................3-11 
3.10 Vertical and Horizontal Size Settings........................................................3-13 
3.11 Software Updating........................................................................\
.............3-14 
3.12 Cleaning Lenses, ILA® Assemblies and Mirrors.......................................3-18 
Chapter 4  Maintenance (Removal/Replacement) 
4.1   Introduction........................................................................\
........................4-1 
4.2   Projector Covers........................................................................\
................4-4 
4.3   Air Filters........................................................................\
...........................4-5 
4.4   Arc Lamp Assembly.................................................\
..................................4-5 
4.5   Ignitor Assembly........................................................................\
................4-7 
4.6   Arc Lamp Power Supply........................................................................\
....4-8 
4.7   Low Voltage Power Supply..........................................\
..............................4-9 
4.8   High Voltage Power Supply.......................................................................4-10 
4.9   Raster Timing, System Controller, Video Processor PCBs.......................4-12 
4.10 Convergence/Deflection PCB....................................................................4-13 
4.11 Horizontal/Vertical Deflection PCB............................................................4-14 
4.12 Video Input Cards (VICs)........................................................................\
..4-15 
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   iii 
						

							 
PCB Status LEDs........................................................................\
......................5-1 
Error Codes ........................................................................\
...........................5-4 
Troubleshooting Guide........................................................................\
..............5-6 
Chapter 6  Parts List........................................................................\
......6-1 
Appendix A Import/Export...................................................A-1 
Appendix B Glossary........................................................................\
....B-1 
 
 Model 220 Service Manual iv  
						

							  Safety Information 
Safety Information 
Introduction 
Read entire Safety Chapter thoroughly before performing any 
maintenance or service on the projector.  Only qualified service 
personnel should perform procedures and adjustments. 
Safety Equipment: Use safety equipment specified in the 
projector’s Maintenance training and certification program or 
equivalent maintain equipment. 
WARNINGS AND CAUTIONS! 
Warnings and Cautions in this manual should be read thoroughly 
and strictly adhered to. Warning and Caution definitions and 
symbols are as follows: 
WARNING SYMBOL Warns user of a 
potential electric shock hazard in a procedure or situation that 
could result in personal injury if improperly performed. 
CAUTION SYMBOL 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   v 
						

							Safety Information 
Installation Safeguards 
 
WARNING!!! Procedures in this service manual require 
removing the projector’s covers to access internal component to 
remove, replace, service and adjust the projector. Only Hughes-
JVC Certified Technicians are qualified to perform these 
procedures.  Before removing or replacing any internal 
components or subassemblies, verify that the circuit breaker on 
the back panel is in the Off position and remove the power plug. 
Any adjustments performed that require covers off and power on 
should be performed with extreme care.  Be especially aware of 
all hazardous areas indicated by warning and caution labels. 
 
CAUTION!!! Do not use a forklift to lift the projector without 
using a safe shipping pallet. Lifting the projector without 
supporting the weight at the foot locations can cause severe 
damage to the projector. 
If there is any visible damage to the power cable, disconnect 
power to the projector until the damaged cable is replaced. Install 
the projector on a smooth, vibration-resistant level surface, or 
ceiling mount, in an area free from dust and moisture. Do not 
place the equipment in direct sunlight or near heat-radiating 
appliances. Smoke, steam and exposure to direct sunlight could 
adversely affect the internal components. 
If mounting the projector, use hardware that can handle a 
minimum of three (3) times the projector weight. 
Heat Safeguards 
Fans and Ventilation: The projector has multiple fans to cool the 
system. Do not block the intake or outflow of any fans.  Heat is 
emitted within the system and must be properly dissipated to keep 
the system running correctly.  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 vi  
						

							  Safety Information 
CAUTION! Do not unplug the power cord until after the arc 
lamp fan has stopped running. This fan protects the arc lamp from 
overheating. Disconnecting power before the cooling fans have 
stopped running can shorten Arc Lamp life. 
Light Safeguards 
Ultra Violet and Infrared Light 
Eye and face protection from ultra violet light and infrared light in 
accordance with the following conditions: 
1.  X3 (up to 375 nanometers), ANSI approved, shade 
goggles must be worn by anyone near the projector 
when it is lit and the cover is off. 
2.  X5 (375 to 700 nanometers), ANSI approved, shade 
goggles when actually working on the projector 
near the arc lamp source. 
WARNING, BRIGHT LIGHT!!!  
Never look directly at the Arc Lamp, the lighted Projection 
Lens or into the lamp housing, from any distance, when the 
projector is on. Direct exposure to light of this brightness can 
cause severe eye injury.  
Dangerous levels of ultraviolet and infrared radiation, 
dangerous glare, very high temperatures (180°C to 300°C) and 
high internal gas pressure are present at the Xenon Arc 
Lamp. The lamp is contained in a protective reflector housing 
module and should not be operated outside this housing or 
outside of the projector. 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. Any servicing of the Arc Lamp must 
remain restricted to Hughes-JVC certified maintenance 
personnel.  
Electrical Safeguards 
 
Model 220 Service Manual   vii
High voltage access. Front 
and rear covers contain 
safety interlocks. Defeat 
restricted to Hughes-JVC 
certified service personnel!  
						

							Safety Information 
 
 
WARNING!!! High Voltage points up to 40,000 volts 
are exposed inside the covers. Allow at least one minute for 
the high voltage to bleed off, even after power is turned off. 
Due to high voltage danger, DO NOT TOUCH 
• CRT cables. These cables can cause severe shock from a 
tiny, invisible crack or hole and should never be touched 
while projector power is on. 
• CRT anodes. 
• Main power ± supply posts. 
• Arc Lamp main power ± posts 
• CRT yoke assemblies and other proximity electrical 
assemblies, components and wiring. If performing the ILA® 
Back Focus, CRT Mechanical Focus, CRT rotation, width 
adjustment, or ILA® Overlap adjustment, always use an 
ANSI/ASTM 10,000 volt rated glove. Periodically check the 
condition of the gloves for cracks. 
Power Supply 
The projector operates from a 100V - 240V, 20 Amp, single-
phase, 50/60 Hz AC power source. Ensure local power source 
matches these requirements before operating! 
For continued safe and reliable operation, only use cables 
supplied by the manufacturer for power and signal connections. 
Fluid Safeguards 
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. 
 
 Model 220 Service Manual viii  
						

							  Safety Information 
Ventilation and Foreign Object Retrieval 
CAUTION! Ensure the projector’s multiple fans are free from 
obstructions and operating properly. Air filters are located at vent 
ports on the cover. Air filters require periodic cleaning to ensure 
adequate cooling of the projector (Section 4.3). Ensure that all 
vent ports are clear of obstructions. 
Keep the inside of the projector free from foreign objects, such as 
hairpins, nails, paper, etc.  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   ix 
						

							Safety Information 
 Model 220 Service Manual x