JVC 330 User manual

SERVICE

MANUAL

Model 330

Model 340 SC

Model 370 SC

Hughes-JVC Technology Corporation

2310 Camino Vida Roble, Carlsbad, CA 92009-1504

☎760-929-5300 FAX 760-929-5410 e-✉serv[email protected]

DECLARATION OF CONFORMITY

PER ISO/IEC GUIDE 22 AND EN 45014

iii Model 330, 340SC and 370SC Service Manual

Manufacturer: Hughes-JVC Technology Corporation

2310 Camino Vida Roble

Carlsbad, CA 92009-1504

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.

105662 First Edition January 1998

Rev A September 1998

Confidential and proprietary information.

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.

Hughes-JVC Technology Corporation

is ISO 9001 Registered and Certified.

Safety

Model 330, 340SC, and 370SC Service Manual v

Safety Information

Introduction

Before operating or working on a Model 330, 340SC and 370SC Projector, especially

with the cover off, please read this safety information section thoroughly. Procedures

requiring the opening of the projector covers and/or contact with electrical components

should be performed by qualified service personnel. Strictly adhere to all notes and

warnings.

Safety Equipment

Safety equipment specified in the Hughes-JVC Series 300 Projector Service and

Operator’s Training Course and certification program or equivalent should be used for

maintenance of the equipment.

Warnings and Cautions

Warnings and Cautions in this manual should be read thoroughly and strictly adhered to.

Warning and Caution symbols and definitions are as follows:

WARNING!!! Warns user of a potential electric shock hazard

and/or specific procedure or situation that could result in personal injury if

improperly performed.

CAUTION! Warns user of a potential safety hazard or potential light

hazards that could cause severe eye injury or a specific procedure or situation

that could result in damage to the equipment if improperly used.

The following important safety instructions are designed to insure your safety and the

long life of your projector. Be sure to read these safety instructions thoroughly and adhere

to all warnings given below.

This device complies with Part 15 of the FCC Rules. Operation is subject to the following

two conditions: (1) this device may not cause harmful interference and (2) this device

Safety

vi Model 330, 340SC, and 370SC Service Manual

must accept any interference received including interference that may cause undesired

operation.

Operation of this equipment in a residential area is likely to cause harmful interference, in

which case the user will be required to correct the interference at their own expense.

Shielded interconnect cables must be used with this equipment to insure compliance with

the pertinent RF emission limits governing this device.

Installation Safeguards

WARNING!!! If there is any visible damage to any of the cables do

not power on the projector until the damaged cable is replaced.

CAUTION!Place the projector on a smooth, stable and level surface

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. Avoid rough handling

when moving your equipment, as a strong shock could damage its internal

components.

CAUTION!If installing a ceiling mount, use only parts supplied or

recommended by the manufacturer. Observe all instructions and warnings as

listed in this manual.

Projector Weight

The HJT projector and shipping container have a combined weight of either 512 (Model

330 and 340SC) or 550 (Model 370SC) pounds. The HJT shipping container weighs 170

pounds and the projector itself weighs either 342 (Model 330 and 340SC) or 380 (Model

370SC) pounds.

Do Not Tilt the Projector More Than 85 Degrees

Do not mount the projector on an excessively tilted base. The projector can be tilted a

maximum of 85 degrees. Mount it only on a stable, vibration-resistant base capable of

supporting at least three times its weight. If in doubt, contact the factory.

Safety

vii Model 330, 340SC, and 370SC Service Manual

Avoid Projector Angles of 15°to 23°

Due to voids in the prism fluid there is a dead zone of 19°±4°. For this reason, avoid

projector angles of 15°to 23°.

Maximum Projector to Screen Angle is 15°

The maximum vertical tilt angle from projector to screen is 15°. This is the maximum

amount of keystone correction that is possible.

Heat Safeguards

Fans

The projector has multiple fans (exact number varies with projector model number) to

cool the projector system. Do not block the intake or outflow of any of the fans.

Intense heat is emitted within the system and must be properly dissipated in order to keep

the system running properly.

CAUTION!Do Not Block Ventilation. Blocking air intake or exhaust

ports can lead to projector overheating. Do not enclose the unit in a restricted

space. Refer to the appropriate Operator’s Manual for physical access and

thermal clearance and for specific clearances needed for heat dissipation. Allow

at least ten (10) minutes for projector cool down before removing power.

CAUTION!Do not unplug the power cord until after the arc lamp fan

has stopped running. This fan protects the arc lamp from overheating.

Light Safeguards

Ultra Violet and Infrared Light

Eye/face protection is required from ultra violet light and infrared light in accordance

with the following conditions:

1. X3 (up to 375 nanometers) shade goggles must be worn by anyone near the

projector when the lamp is lit and the cover is off.

2. X5 (375 to 700 nanometers) shade goggles when actually working on the

projector near the arc lamp source.

Safety

viii Model 330, 340SC, and 370SC Service Manual

WARNING!!!High temperature, ultraviolet and infrared light. Refer

all service to factory authorized personnel.

Ultraviolet radiation, dangerous glare, and high internal gas pressure

is present at the Xenon Arc Lamp. It is contained in a protective reflector housing

module.

DO NOT operate the Xenon Arc Lamp outside its intended standard housing or outside

of the projector.

When replacement is required, the arc lamp must be replaced as an entire module as

outlined in the Hughes-JVC Model 330, 340SC and 370SC Projector Service Manual.

No attempt should ever be made to replace the arc lamp inside its module!

The arc lamp produces dangerous intense light with hazardous levels of ultraviolet and

infrared radiation. It operates at high temperatures (180ºC, maximum 300º C or over 500º

F).

Do not touch the xenon arc lamp or any connections when the lamp is ignited or is arcing.

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 and light is projected. Direct exposure to light of this

brightness can cause severe eye injury.

WARNING!!!High voltage access and safety interlock. Defeat

restricted to factory authorized service personnel!

WARNING!!!High voltage points up to 40,000 volts are exposed inside the covers.

Allow at least one minute to bleed off high voltage even after the unit has been turned off.

Due to high voltage danger, DO NOT TOUCH:

!White cables to CRTs—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—underneath the CRTs.

!Main power +/- supply posts—if shorted with metal objects,

!80 amps can flow across the terminals.

Safety

ix Model 330, 340SC, and 370SC Service Manual

!CRT yoke assemblies and other proximity electrical assemblies, components and

wiring—if performing the yoke rotation or width adjustment (outlined in Section

3.2), always use an

!ANSI/ASTM 10,000 volt rated safety glove.

!Periodically check the condition of safety gloves for cracks.

!Arc Lamp main power ± posts.

Power Supply

The projectors operate from power sources indicated in the table below. Verify that local

power source matches these requirements before operation!

Projector Power Supplies

Power

330

340SC

370SC

200-240V

Current

50-60

Watts

2,700

3,325

4,550

Handle the power cord carefully and avoid excessive bending.

A damaged cord may cause electric shock or fire. For continued safe and reliable

operation, only use cables supplied by the manufacturer for power and signal connections.

Installation should be performed by an electrician with current knowledge of electrical

codes in the country of use.

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.

Ventilation and Foreign Object Retrieval

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 (see Section 4.3). Verify that vent ports are clear

of all obstructions.

Keep the projector free from foreign objects, such as hairpins, nails, paper, etc. Do not

attempt to retrieve such objects yourself or insert metal objects such as wire and

screwdrivers inside the unit. If an object falls inside the projector, unplug the projector

immediately and call a Hughes-JVC certified technician for removal.

Safety

xModel 330, 340SC, and 370SC Service Manual

WARNING!!!Various procedures in this manual involve the removal

and replacement of system subassemblies. Ensure that the projector AC power

plug is removed from the AC outlet prior to attempting any of these procedures.

Safety

xi Model 330, 340SC, and 370SC Service Manual

Chapter 1---Introduction

Model 330, 340SC and 370SC Service Manual 1-1

1.0 Introduction

This Model 330, 340SC and 370SC Service Manual combines three (3) similar

projector models into one (1) reference book, and should be used in conjunction

with the appropriate projector Operator’s Manual. This manual provides more

detailed information on troubleshooting and maintaining the projectors and a more

in-depth functional description of the system subassemblies than the specific

Operator’s Manual, which cover the specific projector system description,

installation, adjustments, operation, maintenance, specifications, troubleshooting

guide, and parts list.

The areas covered in this Service Manual include any similarities and differences

of functional descriptions of Model 330, 340SC and 370SC projector electronics,

service adjustments, maintenance (removal and replacement of subassemblies),

and troubleshooting.

1.1 Acronyms Used In Manual

ALPS Arc Lamp Power Supply

CH Channel

CPU Central Processing Unit

CRT Cathode Ray Tube

DSP Digital Signal Processor

EPROM Erasable Programmable Read-Only Memory

F to V Frequency to Voltage

G2 CRT Grid 2

HDB Horizontal Deflection Board

HDTV High Definition Television

HSYNC Horizontal Sync

HVPS High Voltage Power Supply

ILA®Image Light Amplifier

I/O Input/Output

I/R Infrared

kHz Kilohertz

LED Light Emitting Diode

LVPS Low Voltage Power Supply

NTSC National Television Standards Committee

PCB Printed Circuit Board

PLL Phase Lock Loop

PLUGE Picture Line-Up Generating Equipment

RAM Random Access Memory

RGB Red, Green and Blue

ROM Read Only Memory

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