Canon LV-7545U, D78-5232, LV-7545E, D78-5233 Service Manual

SERVICE MANUAL

English Edition

LV-7545U/D78-5232
LV-7545E/D78-5233

By Portable Document Format

1 General

0 PREFACE

2 Repair

3 Adjustment

4 Troubleshooting

5 Parts Catalog

6 Electrical Diagrams

To Contents

DY8-1785-231 500

CANON Power Projector

LV-7545E D78-5231

SERVICE

SMANUAL

Technical Documents

Application

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Copyright © 2001 by Canon Inc.
CANON INC.
30-2 Shimomaruko 3-Chome, Ohta-ku,
Tokyo 146-8501, Japan

First published Novemver, 2001

PREFACE

1. Service Manual Composition

This manual contains information on servicing the product. It has the following

sections.

Part 1 General Information

Provides the basic information needed to understand the product.
(Operating instructions are not included. Refer to the product's instruction book if
necessary.)

Part 2 Repair Information

Provides information for disassembly, reassembly, and adjustment of the product, about
the tools required, and their application.

Part 3 Adjustment

Provides information for disassembly, reassembly, and adjustment of the product to
assure precision of the products, about the tools required, and their application.

Part 4 Troubleshooting

Part 5 Parts Catalog

Part 6 Electrical Diagrams

2. Model Differences

In this series of products, there are models suffixed "J", "U", and "E". The only
differences between the models are cosmetic, mainly the designation and rating plates.
Internally, they are identical.

The accessories bundled with the product may differ from country to country.

I

Main Marketing Area

Japan North America Europe

Model Name

POWER PROJECTOR

MULTIMEDIA PROJECTOR MULTIMEDIA PROJECTOR

LV-7545J LV-7545U LV-7545E

3. Tools & Test Equipment

The following tools and equipment are required to perform disassembly, reassembly

and adjustment.

1) Special Tools

None

2) General Purpose Tools (Commercially available, but can be purchased with
the following numbers.)

3) Test Equipment

4) Other Equipment

5) Chart/Software

II

Description Tool No. Specification Remarks

Ball Driver CY9-5002-000 2.0mm Optical Parts Removal

& Adjustment

Hex Key Set CY9-5007-000 2.0mm Optical Parts Removal

& Adjustment
Driver, adjustment CY9-5003-000 1.8mm Electrical Adjustments
Driver, Slot CY9-5004-000 4.0mm

Optical Parts Adjustment
Driver, Cross-point CY9-5005-000 No.2 A

ssembly & Disassembly

Description Tool No. Specification Remarks

Digital Multi-meter Commercially DC1mmV~500V Electrical Adjustment

available

Video Signal Generator

Commercially Color Bars and Gray

Electrical Adjustment

available Scale

Computer Signal Commercially Gray Scale

Electrical Adjustment
Generator available (or personal computer)

Oscilloscope

Commercially 100MHz response or Waveform Checks and

available over Electrical Adjustment

Description Tool No. Specification Remarks

Screen

Commercially Over 40"

All Adjustment

available

Personal Computer

Commercially Windows 95 OS

All Adjustment

available (with a floppy disk)

Description Tool No. Specification Remarks

Monitor Tester Supplied with manual Bitmap Data All Adjustment
Gray Scale Chart Supplied with manual (XGA and SVGA) All Adjustment
Color Shading

Supplied with manual Ver.1.01

White Uniformity
Correction Tool Adjustment

CONTENTS

Page

Part 1: General Information

1. FEATURES ...................................................................................................... 1-1

1.1 Development objectives ........................................................................... 1-1

1.2 Major Features ......................................................................................... 1-2

2. LV-7545 SPECIFICATIONS ............................................................................ 1-3

2.1 Type.......................................................................................................... 1-3

2.2 LCD panel................................................................................................. 1-3

2.3 Optical box................................................................................................ 1-3

2.4 Mechanism ............................................................................................... 1-3

2.5 Video/audio............................................................................................... 1-3

2.6 Connectors ............................................................................................... 1-4

2.7 Standard ................................................................................................... 1-4

2.8 Accessories .............................................................................................. 1-4

2.9 Options ..................................................................................................... 1-4

2.10 Others ..................................................................................................... 1-4

3. NOMENCLATURE ........................................................................................... 1-5

3.1 Name of each part of projector ................................................................. 1-5

3.2 Top controls and indicators....................................................................... 1-5

3.3 Rear panel terminals ................................................................................ 1-5

3.4 Computer Input terminal/Control port connector ...................................... 1-5

3.5 Remote control ........................................................................................ 1-5

3.6 Remote control operating range .............................................................. 1-5

4. COMMENTARY ............................................................................................... 1-6

4.1 External appearance design .................................................................... 1-6

4.2 Optical System ......................................................................................... 1-6

4.3 Turbo Bright System ................................................................................ 1-7

4.4 Video Input System .................................................................................. 1-7

4.5 Image Control .......................................................................................... 1-8

4.6 Mechanism .............................................................................................. 1-8

4.7 Replacement Lenses ............................................................................... 1-9

5. CONNECTION DIAGRAM ............................................................................... 1-11

5.1 Connection to the computer ..................................................................... 1-11

5.2 Connecting to the video equipment ......................................................... 1-11

6. SETTING-UP THE PROJECTOR .................................................................... 1-12

6.1 Positioning the projector .......................................................................... 1-12

6.2 Installation precautions ............................................................................ 1-12

7. SUPPORTED COMPUTER SYSTEM MODE ................................................. 1-13

Part 2: Repair Information

1. SAFETY INSTRUCTIONS ............................................................................... 2-1

2. CIRCUIT PROTECTIONS ............................................................................... 2-2

2.1 Fuse ......................................................................................................... 2-2

III

2.2 Thermal Switch ........................................................................................ 2-2

2.3 Interlock Switch ........................................................................................ 2-3

2.4 Warning Temperature and Power Failure Protection .............................. 2-3

2.5 Air Filter Care and Cleaning .................................................................... 2-4

3. SERVICE (MECHANICAL DISASSEMBLES) ................................................. 2-5

3.1 Cabinet Top Removal .............................................................................. 2-5

3.2 Front Cabinet Removal ............................................................................ 2-6

3.3 Main Board Removal ............................................................................... 2-7

3.4 AV and Rear Panel Removal ................................................................... 2-7

3.5 Lamp Ballast Unit Removal ..................................................................... 2-8

3.6 Optical Unit Removal ............................................................................... 2-8

3.7 Prism Base Removal ............................................................................... 2-9

3.8 Power Supply Unit Removal .................................................................... 2-9

3.9 Filter Unit, Thermal Switch and Interlock Switch Removal ...................... 2-10

3.10 Fan (FN901, FN902) Removal .............................................................. 2-10

4. OPTICAL PARTS DISASSEMBLES AND REASSEMBLES ........................... 2-11

4.1 Projection Lens Removal ......................................................................... 2-11

4.2 Polarized Glass (IN) Ass'y Disassembly .................................................. 2-11

4.3 Relay Lens Ass'y Disassembly ................................................................ 2-12

4.4 Polarized Glass (OUT) Ass'y Disassembly .............................................. 2-12

4.5 Bright Motor Ass'y Disassembly .............................................................. 2-13

4.6 Optical Unit Opening ................................................................................ 2-13

4.7 Condenser Lens Removal ....................................................................... 2-14

4.8 Optical Filter Removal .............................................................................. 2-14

4.9 Locations and Directions ......................................................................... 2-15

5. LCD PANEL/PRISM ASS'Y REPLACEMENT ................................................. 2-16

5.1 LCD Panel/Prism Ass'y Replacement ...................................................... 2-16

5.2 Note on LCD Panel/Prism Ass'y Mounting .............................................. 2-17

6. CLEANING ....................................................................................................... 2-18

7. LAMP REPLACEMENT ................................................................................... 2-19

Part 3: Adjustment

1. PRECAUTIONS FOR ADJUSTMENT ............................................................. 3-1

1.1 Adjustments after Parts Replacement ..................................................... 3-1

1.2 Service Adjustment Menu Operation ....................................................... 3-2

1.3 IC Adjustment Data Table ........................................................................ 3-3

2. ELECTRICAL ADJUSTMENTS ....................................................................... 3-10

2.1 Output Voltage Adjustment ...................................................................... 3-10

2.2 +16V Adjustment ..................................................................................... 3-11

2.3 Video Center Adjustment ......................................................................... 3-11

2.4 PC Pedestal Adjustment .......................................................................... 3-11

2.5 PSIG Adjustment ..................................................................................... 3-12

2.6 Black Level Adjustment ........................................................................... 3-12

2.7 PC Gain Adjustment ................................................................................ 3-13

2.8 PC Gamma Shift Adjustment ................................................................... 3-13

2.9 HTDV Pedestal Adjustment ..................................................................... 3-13

2.10 HDTV A/D Input Adjustment .................................................................. 3-14

IV

2.11 HDTV Gain Adjustment ......................................................................... 3-15

2.12 VIDEO Pedestal Adjustment .................................................................. 3-16

2.13 VIDEO A/D Input Adjustment ................................................................. 3-16

2.14 A/D Offset Adjustment ........................................................................... 3-17

2.15 Video Gain Adjustment .......................................................................... 3-17

2.16 Video Gamma Shift Adjustment ............................................................. 3-18

2.17 Common Center Adjustment ................................................................. 3-18

2.18 White Balance Adjustment ..................................................................... 3-18

2.19 Note on White Uniformity Adjustment .................................................... 3-18

3. OPTICAL ADJUSTMENTS .............................................................................. 3-19

3.1 Contrast Adjustment ................................................................................ 3-19

3.2 Condenser Lens Adjustment ................................................................... 3-20

3.3 Relay Lens (OUT) Adjustment ................................................................. 3-21

4. TEST POINTS AND LOCATIONS ................................................................... 3-22

Part 4: Troubleshooting

1. TROUBLESHOOTING ..................................................................................... 4-1

1.1 No Power ................................................................................................. 4-1

1.2 No picture ................................................................................................ 4-4

1.3 No sound ................................................................................................. 4-7

1.4 Lens Motor Error ...................................................................................... 4-8

2. PORT FUNCTIONS ......................................................................................... 4-9

2.1 System control & I/O port table (IC801) ................................................... 4-9

2.2 Parallel I/O expander (IC1801, M66500FP) ............................................. 4-11

2.3 IC bus I/O expander (IC1641, M62320FP) port function ......................... 4-12

2.4 IC bus DA converter (IC212, M62393FP) port function ........................... 4-12

2.5 IC bus DA converter (IC2381, M62393FP) port function ......................... 4-12

2.6 IC bus DA converter (IC3551, M62399FP) port function ......................... 4-13

2.7 IC bus DA converter (IC3501, M62399FP) port function ......................... 4-13

3. WAVEFORMS ................................................................................................. 4-14

4. IC BLOCK DIAGRAMS .................................................................................... 4-16

Part 5: Parts Catalog

Part 6: Electrical Diagrams

1. PARTS DESCRIPTION AND READING IN SCHEMATIC DIAGRAM.............. 6-1

2. DIODE, TRANSISTOR AND IC PINS............................................................... 6-3

Circuit Block Diagram (LV-7545U/E)................................................................. A3

Power Supply Lines (LV-7545U/E) ................................................................... A4

Schematic Diagrams ......................................................................................... A5

Printed Wiring Board Diagrams......................................................................... A13

V

Part 1

General

Information

1. FEATURES

1.1 Development objectives

This projector has been newly developed as a successor to the Canon Multimedia
Projector "LV-7535" as a "flagship model" to achieve the highest brightness in its class,
high quality and functions.

As the recent market trend shows that the brightness of the ultra-portable class (0.9")
of projectors is increasing greatly, higher functions and performance are being
demanded. Since they are used in various places, such as large conference rooms,
halls, and offices, they must have flexible functions.

The product has a Canon's unique power-driven Turbo Bright System that provides
the top-level brightness at its class and has the replacement lens system and power lens
shift mechanism that reflect the Canon's design concept to achieve both high quality
and installability. In addition, it has various interfaces to provide the features and
performance suitable as a flagship model with system scalability in mind.

Fig. 1-1 LV-7545 External View

Part 1: General Information

1-1

1.2 Major Features

● New power-driven Turbo Bright System. Highest brightness of 3700 ANSI lumen in the
class

The projector achieves the highest brightness in its class with the Canon's original
Turbo Bright System and new optical design.
A remote control can be used to switch between Bright ON and OFF.

● XGA LCD panel with contrast ratio of 800:1

A high contrast of 800:1 is achieved by improving transmittance of the 1.3" LCD panel
with 1024 × 768 pixels and using a contrast improvement filter.
High-quality SXGA projection is provided by XGA real projection and digital
compression.

● Power-driven lens shift mechanism. Three types of optional replacement lenses

The power-driven lens shift mechanism can shift the projection screen position
vertically.
In addition to the standard lens, three types of optional replacement lenses (ultra wide
angle lens, wide angle zoom lens and long focus zoom lens) are available.
These functions can cope with various installation conditions, such as height and
distance, flexibly to provide high-quality projection all the time.

● Video mode selection function suitable for projection data

The optimum gradation can be reproduced according to projection data for PC input
and video input by switching between video modes: standard/high contrast for PC
input and standard/cinema.

● Clear PC image by DVI. High-quality video image by the progressive scan function

Supports digital interface (DVI) to reproduce clear PC images.
Uses progress scan to project higher-quality video and HDTV images.

● 37dB silent design

The fan speed is optimized by detecting the inside temperature.
The noise is suppressed by reducing the unnecessary increase in fan speed.

● Extended Digital Keystone function, up to ±40 degrees

Smoothly corrects for "keystone" effect, giving a square image with up to 40 degrees
tilt.

Part 1: General Information

1-2

2. LV-7545 SPECIFICATIONS

2.1 Type Portable XGA LCD Projector

2.2 LCD panel

1. Type Polysilicon active matrix TFT with microlens

2. Size/number 1.3 model (4:3 aspect ratio) × 3

3. Number of pixels 1024 × 768 pixels (XGA)

4. Contrast ratio 800:1 (all white:all black)

2.3 Optical box

1. Type Dichoic mirror separation/prism synthesis

2. Light source 200W UHP lamp

3. Projection lens 11 groups, 13 lenses
configuration

4. F value/focal length 1.7 to 2.0, 48.2 to 62.6mm,

5. Zoom magnification ×1.3

6. Zoom/focus Power

2.4 Mechanism

1. Lens shift 1:1 to 10:0, power

2. Elevation mechanism UP by 10.5 degrees (Maximum)

2.5 Video/audio

1. Brightness 3700/3200 ANSI lumen (Bright ON/Bright OFF),

illuminance ratio 90%

2. Correct projection distance 1.4 to 14.7 m

3. Size of projection image 31" to 400"

4. Resolution of display SXGA (compression)/XGA/SVGA/VGA
supported

5. Digital zoom magnification ×1/4to ×49

6. Keystone correction range ±40 degrees (vertical)

7. Horizontal resolution 800 TV lines

8. Scanning frequency 15KHz to 100KHz for horizontal sync.

50Hz to 100Hz for vertical sync.
Up to 180MHz for dot clock

9. Color system NTSC, PAL, SECAM, NTSC4.43, PAL-M, PAL-N

10.Built-in speaker 50mm × 50mm × 2

11.Audio output 2W + 2W, stereo

Part 1: General Information

1-3

2.6 Connectors

1. Analog RGB input Mini D-sub 15-pin, BNC × 5

2. Digital RGB input DVI 24-pin

3. Video input RCA × 3: component, RCA × 1 (shared): composite
BNC × 3 (shared): component, BNC × 1 (shared):
composite
Mini DIN 4-pin: S-Video

4. Audio output Stereo mini jack × 2, RCA × 2 (stereo)

5. Mouse control Mini DIN 8 pins, USB type (type B)

2.7 Standard

1. Dimensions (W × H × D) 319mm × 168mm × 465.2mm (See the External View.)

2. Net Weight 8.5Kg

3. Rated supply voltage 100V AC, 100 to 120 V/200 to 240V, 50/60Hz

4. Power consumption 300W

5. Noise 37dB

6. Operating temperature 5 to 35˚C

7. Storage temperature –10 to 60˚C

2.8 Accessories

1. Remote control transmitter, remote control connection cord (1.5m)

2. Computer connection cable (Dsub15-Dsub15)

3. Conversion adapter for Macintosh

4. Mouse control cables (PS/2, serial and Macintosh ports, 1 each)

5. Lens cap

6. Dust cover

7. Power cord

2.9 Options

1. Replacement lenses (option)

In addition to the standard projection lens, three types of replacement lenses are
available for this product.
Ultra wide angle lens LV-IL01
Wide angle zoom lens LV-IL02
Long focus zoom lens LV-IL03 (See 4. COMMENTARY for details.)
These lenses can be used under various installation conditions in conference
rooms and large halls.

2. DVI computer connection cable LV-CA29

This cable is used to input digital RGB video signals from a PC.

3. Canon ceiling mount fitting LV-CL07

Hanger for ceiling mount
* Ask a specialist to install the projector in the best location.

2.10 Others

Canon replacement lamp (LV-LP13)
Recommended lamp replacement time 1000 hours

Part 1: General Information

1-4

3. NOMENCLATURE

3.1 Name of each part of projector: See the attached sheet
(Owner's Manual, page 7).

3.2 Top controls and indicators: See the attached sheet

(Owner's Manual, page 16).

3.3 Rear panel terminals: See the attached sheet

(Owner's Manual, page 11).

3.4 Computer Input terminal/Control port connector:

See the attached sheet (Owner's Manual, page 43).

3.5 Remote control: See the attached sheet

(Owner's Manual, page 14).

3.6 Remote control operating range: See the attached sheet

(Owner's Manual, page 15).

Part 1: General Information

1-5

4. COMMENTARY

4.1 External appearance design

● External Styling

The entire body is designed with smooth curves and uses simple lines for the BRIGHT
indicator on the top and the infrared receiver on the front panel.
This gives an impression of a modern sophisticated office equipment suitable for the
flagship model of Canon new-generation projector.

● Coloring

The new-generation Canon projectors have two basic colors of satin metallic silver,
which evokes a sophisticated image, and glacial blue, which makes you feel at ease.
This projector has larger glacial blue areas than the other new models and the
operation keys and the Canon logo colored a glossy metallic color to give an
impression of a sophisticated office equipment.
In addition, its details have been designed carefully to make it worth the top model by
painting all screws silver, for example.

● Usability

The projector can be operated easily because of high visibility with larger letters with
high-contrast color printed on the operation panel and near connectors.
The lamp and lenses are designed as follows so that they can be easily replaced.

• The lens assembly can be accessed by removing two screws on the top and the
cover.

• The projector has a lamp replacement lid on the back. The lamp assembly can be
accessed by removing two screws from the lid..

4.2 Optical System

● The projection lenses have been newly designed and the LCD panel has been improved
to achieve high brightness and high contrast. In addition, the power-driven Turbo
Bright System has been built into the projector to realize the top-level brightness of
3700 ANSI lumen in its class..

● Large aperture zoom lens: f1.7

large aperture f1.7 projection lens is adopted. The optical system has 11 groups of 13
elements. The zoom has been designed so that four of six groups are moved to
minimize aberrations and improve illuminance ratio.
This product offers the highest brightness in its class and excellent resolution.
All lenses are made from lead-free glass

● LCD panel

The opening ratio of the LCD panel has been increased to improve transmittance and
the contrast improvement film has been modified to achieve the highest level of
contrast ratio of 800:1 (all white/all black).

Part 1: General Information

1-6

4.3 Turbo Bright System

This product has an additional function that electrically controls the Canon's original

Turbo Bright System, which enables switching brightness and color with a remote
control.

The highest brightness can be switched with the BRIGHT button, as follows:
BRIGHT ON: 3700 ANSI lumen ↔ BRIGHT OFF: 3200 ANSI lumen

4.4 Video Input System

1) RGB input

● Analog or digital (DVI) input

Real XGA images can be projected with the 1.3" LCD panel with 1024 × 768 pixels.
High-quality SXGA images can also be projected using the digital compression
technology.
SXGA, XGA, SVGA and VGA signals are supported.
* SXGA is not supported for digital input.

● Multi scan system

The appropriate system mode is automatically selected by recognizing the horizontal
and vertical frequencies of video signals from a PC.

● Automatic PC adjustment function

Three items, i.e., the total number of dots in the horizontal direction of the screen,
tracking and screen position, can be automatically adjusted.

* Some PCs cannot adjust all these items completely. In this case, adjust them

manually.

* If a digital signal is input or the RGB, 720p, 1035i, 1080i50 or 1080i60 system

mode is selected, automatic adjustment does not work.

2) Component input

● Supports HDTV, DTV and DVD component input.

Supports 1080i, 1035i, 720p, 575p, 480p, 575i and 480i. (Automatic or manual)
Supports color difference signals (Y, Pb/Cb, Pr/Cr) input. Beautiful images are
reproduced with minimal blurring of color.

3) Composite input or S-Video input

● Color system

Supports many color systems: NTSC, PAL, SECAM, NTSC4.43, PAL-M and PAL-N.
Automatically detects color system, except PAL-M and PAL-N.
* The composite (video) input uses the same connector as used for the intensity

signal (Y) for component input.

Part 1: General Information

1-7

4.5 Image Control

● Digital keystone function

Smoothly corrects for "keystone" effect on the projection screen, giving a square image
with up to 40 degrees tilt.

● Digital zoom function

Digital zoom enlarges (or shrinks) any selected part of the presentation image (×1/4 to
×49).

● Image inversion function

Images are inverted horizontally on rear projection, and they are inverted horizontally
and vertically when the projector is suspended from the ceiling.

● Noise reduction function (video signal only)

Three-dimensional noise reduction is adopted. The signal-to-noise ratio is improved
without deteriorating resolution and color.
It is effective to old noisy video images. It can reduce roughness caused by noise.

4.6 Mechanism

● Power-driven lens shift mechanism.

Lens shift is carried out electrically from 1:1 to 2:0.
The power-driven lens shift mechanism can move the projection screen position
vertically and smoothly.

Fig. 1-2

When the lens is shifted to the maximum, the projection screen moves upwards by
approx. 50%. (The screen size is unchanged.)

The projector can be installed more flexibly by combining lens shift with replacement
lenses.

When the ratio is 1:1 When the lens shift is maximized

Part 1: General Information

1-8

Part 1: General Information

1-9

● Automatic fan control system

When the temperature sensor detects a low temperature, the fan speed is reduced
automatically to suppress fan noise, achieving 37dB.
The temperature sensor is located near the air inlet to improve response and optimize
speed.

● Easy lamp replacement mechanism (Canon replacement lamp LV-LP13)

The user can replace the lamp easily.
There is a lamp replacement lid on the rear, and the lamp can be removed just by
removing two screws.

● User cleaning air filter mechanism

The user can replace the air filter easily.
If the air filter become clogged with dust particles, it may result in internal heat build
up. To prevent this, clean the filter regularly.
* Before cleaning the air filter, stop the projector and remove the power plug from the

outlet.

4.7 Replacement Lenses

• LV-IL01, ultra wide angle lens

• LV-IL02, wide angle zoom lens

• LV-IL03, long focus zoom lens

* The projection distance is approximate.
* The ultra wide angle lens (LV-IL01) is mainly designed for rear projection and

assumed to be used with "lens shift U/D ratio of 1:1" for ultra wide angle projection.
If the lens is shifted from the center, the image may be distorted.

LV-IL01 LV-IL02 LV-IL03

22.33 mm 34.3 – 48.02 mm 63.5 – 111.5 mm

Focal length

F2.5 F2.5 –3.06 F2.03 – 2.89

Aperture ratio

0.63 m 0.98 – 1.4 m 1.78 – 3.31 m

40 type

0.97 m 1.5 – 2.15 m 2.7 – 5.0 m

0

60 type

1.63 m 2.54 – 3.65 m 4.7 – 8.5 m

100 type

3.3 m 5.14 –7.4 m 9.4 – 17.1 m

200 type

14.97 m 7.75 – 11.1 m 14.2 – 25.7 m

300 type

1:1 1:1 to 20:1 1:1 to 20:1Lens shift

1.5 kg 1.7 kg 1.8 kg

Weight

170 mm 193 mm 217 mm

Length

ø130 mm ø99 mm ø99.5mm

Outer diameter

Projection distance

● Guideline for use

Use the appropriate lens for a combination of projector installation position and
screen size.

• See the figure below for the standard lens, LV-IL02 (wide angle zoom lens) and LV-

IL03 (long focus zoom lens).

Fig. 1-3

For example, use a long focus lens to project an image to a 200 type screen
installed at a distance of 12m.

• LV-IL01 (ultra wide zoom lens) can be used for front projection. If it is installed for

front projection, the projector overlaps with the center of the screen. Therefore, it
should be used for rear projection.

Short focus
Standard
Long focus

Projection distance and lens

300 type

200 type

100 type

0 5 10 15 20 25

Projection distance [m]

Part 1: General Information

1-10

5. CONNECTION DIAGRAM

5.1 Connection to the computer: See the attached sheet
(Owner's Manual, page 12).

5.2 Connecting to the video equipment: See the attached sheet
(Owner's Manual, page 13).

Part 1: General Information

1-11

6. SETTING-UP THE PROJECTOR

6.1 Positioning the projector: See the attached sheet
(Owner's Manual, page 9).

6.2 Installation precautions: See the attached sheet
(Owner's Manual, page 8).

Part 1: General Information

1-12

7. SUPPORTED COMPUTER SYSTEM MODE

See the attached sheet (Owner's Manual, page 26).

Part 1: General Information

1-13

Part 2

Repair

Information

Part 2: Repair Information

2-1

1. SAFETY INSTRUCTIONS

The following precautions must be observed during servicing and inspection.

Observe all safety precautions.

Comply with all caution and safety-related notes provided on the cabinet back, cabinet
bottom, inside the cabinet, on the chassis or components, as well as the precautions
shown in the instruction manual during servicing.

Avoid electric shock.

Since an AC voltage is applied to the chassis for the set, touching the chassis during
power-on may cause electric shock. When service is performed during power on, use an
insulation transformer, wear protective gloves, and remove the plug during parts
replacement. As there are high-voltage areas inside the projector, handle it with care
when the power is on.

Use specified parts.

The parts of the set have safety properties, such as inflammability and voltage
withstand. Therefore, use replacement parts with the same characteristics as the
original ones. The critical components for safety are indicated by mark in the
schematic diagram and parts list must be replaced by the recommended parts.

Reinstall parts and wires in their original positions.

Insulating materials, such as tubes and tape, are used and some components are
installed over a PC board for safety. Reinstall internal wires with clamps so that they do
not touch any heat-generating or high-voltage parts.

Safety c

heck after service

Verify that service locations are not deteriorated and all removed screws, parts and
wires are installed in their original positions. In addition, perform the following test to
ensure safety.

Insulation resistance test method

Remove the plug from the electric outlet and press the power switch. Using a 500V
insulation resistance tester (or a multimeter if any insulation resistance tester is not
available), check that the insulation resistance between each terminal of the plug and
external exposed connector (external speaker connector, remote control connector, AV
input/output connector, etc.) is 1Mohm or higher

. If not, the set must be inspected and

repaired.

Components indicated by mark in the parts list and the schematic diagram designate components in
which safety can be of special significance. It is, therefore, particularly recommended that the
replacement of there parts be made by exactly the same parts. Using unspecified parts may worsen
failure or cause fire or electric shock.

Eye damage may result from directly viewing the light produced by the lamp used in this equipment.
Always turn off the lamp before opening the cover.
Never turn the power on without the lamp to avoid electric shock or damage of the devices since the
stabilizer generates high voltages (15kV - 25kV) at its starts.
Since the lamp is very high temperature during units operation replacement of the lamp should be done at
least 45 minutes after the power has been turned off, to allow the lamp cool-off.

Precautions for servicing

Part 2: Repair Information

2-2

2. CIRCUIT PROTECTIONS

This projector is equipped with the following circuit protections to operate in safety. If
the abnormality occurs inside the projector, it will automatically turn off by operating
one of the following protection circuits.

2.1 Fuse

The fuse is located inside of the projector.
When either the LAMP indicator or the
READY indicator is not illuminated, a fuse
may be opened. Check the fuse according to
the following steps. The specified fuse should
be used as follows;

[How to replace the fuse]

1. Remove the cabinet top according to step

1 of "Service (Mechanical Disassembles)".

2. Remove the fuse from fuse holder.

To install the fuse, take reversed step in the above.

2.2 Thermal Switch

When the internal temperature of the
projector reaches near 90˚C, the thermal
switch (SW905) turns off the AC main power
supply automatically.
(Check the resistance between the terminals
of the thermal switch by using a tester. If it is
open, the thermal switch may be in
operative.)
Reset the thermal switch according to the
following procedure.

[How to reset the thermal switch]

1. Remove the cabinet top according to step

1 of "Service (Mechanical Disassembles)".

2. Press the reset button on the thermal switch.

Fuse Part No. DY4-6319-000 (250V 6.3A)

Before pressing the reset
button, disconnect the AC
cord from the projector.

CAUTION

Fig. 2-2

Fig. 2-1

Fuse

Filter unit

Lamp cover

2.3 Interlock Switch

The interlock switch (SW902) cuts AC
power when the lamp cover is removed. If
the lamp cover is opened to replace the
lamp, the projector does not start. Reinstall
the lamp cover.

2.4 Warning Temperature and Power Failure Protection

The TEMP WARNING indicator flashes red and the projector will automatically turn off
when the internal temperature of the projector exceeds the normal temperature or when
stopping cooling fans or when the internal power supply lines are failed. Check the
following possible causes and wait until stopping the TEMP WARNING indicator
flashing.

[Possible causes]

• Air filter is clogged with dust particles. Remove dust from the air filter.

• Ventilation slots of the projector are blocked. In such an event, reposition the

projector so that ventilation slots are not obstructed.

• Check if projector is used at higher temperature place (Normal operating temperature

is 5 to 35˚C)

If the TEMP WARNING indicator still continues to flash, there may be defects on
cooling fans or power supply circuits. Please check fan operation and power supply lines
referring to the "Power Supply Lines Chart".

Part 2: Repair Information

2-3

Fig. 2-3

Interlock switch

Thermal switch

2.5 Air Filter Care and Cleaning

The removable air filter prevents dust from accumulation on the surface of the
projection lens and projection mirror. Should the air filter become clogged with dust
particles, it will reduce the cooling fan's effectiveness and may result in internal heat
build up and reduce the life of the
projector.

To clean up the air filter, follow the
cleaning procedure below:

1. Turn the power off, and disconnect the

AC power cord from the AC outlet.

2. Turn the projector up side down and

remove the air filter by pulling its latches
upward.

3. Clean the air filter with a brush.

4. Replace the air filter properly. Make

sure that the air filter is fully inserted.

Part 2: Repair Information

2-4

Do not operate the projector with the air filter removed. It may result in
the malfunction of the projector.
We recommend to avoid dusty, smoky place for operating the projector.
The dust is stuck on the LCD panel and the mirror, and it may spoil the
fine picture image.
Using in dusty place may cause the picture of poor quality.
When using under the dusty or smoky conditions, dust may accumulate
on the LCD panel and lens inside it, and may resultantly be projected on
the screen together with the picture.
When the above symptoms are noticed, please clean up the LCD panel
and lens according to the "Cleaning Method".

CAUTION

Fig. 2-4

Air filter

3. SERVICE (MECHANICAL DISASSEMBLES)

Mechanical disassemble should be made by following procedures in numerical order.
The following steps show the basic procedures, therefore unnecessary step may be

ignored.

3.1 Cabinet Top Removal

1. Remove 5 screws A and 2 screws B,
loosen 2 screws C, and remove the
cabinet top.

Part 2: Repair Information

2-5

The parts and screws should be placed exactly in the same position as
the original, otherwise it may cause loss of performance and product
safety.

CAUTION

Fig. 2-5

When only the front cabinet
top is removed, screws A
need not be removed.
Remove 2 screws B and the
front lens cover to remove
the front cabinet top.

CAUTION

C

B

A

A

A

A

B

A

C