Hughes JVC 220 User 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