Canon LV-7355J User manual

SERVICE MANUAL
English Edition
LV-7355U/D78-5312
LV-7355E/D78-5313
LV-7350U/D78-5322
LV-7350E/D78-5323
By Portable Document Format
1General
0PREFACE
2Repair
3Adjustment
4Troubleshooting
5Parts Catalog
6Electrical Diagrams
DY8-1785-311 500

CANON Power Projector
LV-7355J D78-5311
LV-7355U D78-5312
LV-7355E D78-5313
LV-7350J D78-5321
LV-7350U D78-5322
LV-7350E D78-5323
SERVICE
SMANUAL

Technical Documents
Application
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The following paragraph does not apply to any countries where such provisions are
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Copyright © 2002 by Canon Inc.
CANON INC.
30-2 Shimomaruko 3-Chome, Ohta-ku,
Tokyo 146-8501, Japan
First published October, 2002

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
POWER PROJECTOR MULTIMEDIA PROJECTOR MULTIMEDIA PROJECTOR
Model Name LV-7355J LV-7355U LV-7355E
LV-7350J LV-7350U LV-7350E

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 Assembly &
Disassembly
Description Tool No. Specification Remarks
Digital Multi-meter Commercially available DC1mmV~500V Electrical Adjustment
Video Signal Generator Commercially available Color Bars and Electrical Adjustment
Gray Scale
Computer Signal Commercially available Gray Scale Electrical Adjustment
Generator (or personal computer)
Oscilloscope Commercially available 100MHz response or Waveform checks
over
Description Tool No. Specification Remarks
Screen Commercially available Over 40" All Adjustment
Personal Computer Commercially available Windows 95 OS All Adjustment
(with a floppy disk)
Description Tool No. Specification Remarks
Monitor Tester Supplied with manual Bitmap Data Electrical Adjustment
Gray Scale Chart Supplied with manual (XGA and SVGA) Electrical Adjustment
Color Shading Supplied with manual Ver. 1.12 White Uniformity
Correction Tool Adjustment

CONTENTS
Page
Part 1: General Information
1. FEATURES ......................................................................................................1-1
1.1 Development Objectives ..........................................................................1-1
1.2 Product Overview ....................................................................................1-1
1.3 Major Features .........................................................................................1-2
2. LV-7350/LV-7355 SPECIFICATION ................................................................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 ..............................................................................................1-4
2.6 Connectors ..............................................................................................1-4
2.7 Standard ..................................................................................................1-5
2.8 Accessories .............................................................................................1-5
2.9 Replacement Part ....................................................................................1-6
2.10 Options ..................................................................................................1-6
3. NOMENCLATURE ...........................................................................................1-7
3.1 Name of each part of projector ................................................................1-7
3.2 Top controls and indicators ......................................................................1-7
3.3 Terminals of projector ..............................................................................1-7
3.4 Configurations of the terminals ................................................................1-7
3.5 Operation of remote control .....................................................................1-7
3.6 Operating range .......................................................................................1-7
4. COMMENTARY ...............................................................................................1-8
4.1 Optical System .........................................................................................1-8
4.2 Mechanism ..............................................................................................1-8
4.3 Design ......................................................................................................1-9
5. CONNECTING .................................................................................................1-10
5.1 Connecting to computer ...........................................................................1-10
5.2 Connecting to video equipment ...............................................................1-10
6. SETTING-UP THE PROJECTOR ....................................................................1-11
6.1 Positioning projector ................................................................................1-11
6.2 Adjustable feet .........................................................................................1-11
6.3 Mounting lens cover .................................................................................1-11
6.4 Moving projector ......................................................................................1-11
7. COMPATIBLE COMPUTER SPECIFICATIONS .............................................1-12
Part 2: Repair Information
1. SAFETY INSTRUCTIONS ...............................................................................2-1
2. CIRCUIT PROTECTIONS ...............................................................................2-2
2.1 Fuse .........................................................................................................2-2
2.2 Thermal Switch ........................................................................................2-2
2.3 Interlock Switch ........................................................................................2-2
2.4 Warning Temperature and Power Failure Protection ..............................2-3
III

2.5 Air Filter Care and Cleaning ....................................................................2-3
3. SERVICE (MECHANICAL DISASSEMBLIES) ................................................2-4
3.1 Cabinet Top and Control Panel Removal ................................................2-4
3.2 Main Board Removal ...............................................................................2-4
3.3 AV, DVI, Temp Board and Speaker Removal ..........................................2-5
3.4 Front Panel and R/C Board Removal ......................................................2-5
3.5 Lamp Ballast Board Removal ..................................................................2-6
3.6 Filter Board Removal ...............................................................................2-6
3.7 Power Box Cover and Fans (FN901, FN906) Removal ...........................2-7
3.8 Optical Unit Removal ...............................................................................2-7
3.9 Power and P.F. Board Removal ..............................................................2-8
3.10 Fan (FN905) Removal ...........................................................................2-9
3.11 Fan (FN902, FN903, FN904) Removal ..................................................2-9
4. OPTICAL PARTS DISASSEMBLIES................................................................2-10
4.1 Projection Lens Removal .........................................................................2-10
4.2 Integrator Lens-In Disassembly ...............................................................2-10
4.3 Condenser Lens Disassembly .................................................................2-11
4.4 Condenser Lens-Out Disassembly ..........................................................2-11
4.5 Relay Lens-Out Disassembly ..................................................................2-12
4.6 Polarized Glass-In Removal ....................................................................2-12
4.7 Polarized Glass-Out/Pre-Polarized Glass Removal .................................2-13
4.8 Optical Unit Top Removal ........................................................................2-13
4.9 Optical Filter and Bright Motor Removal ..................................................2-14
4.10 Locations and Directions .......................................................................2-15
5. LCD PANEL/PRISM ASS'Y REPLACEMENT .................................................2-16
5.1 LCD Panel/Prism Ass'y Removal .............................................................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 Service Conditions ...................................................................................3-2
1.4 Service Adjustment Data Table ...............................................................3-3
2. ELECTRICAL ADJUSTMENTS .......................................................................3-9
2.1 Output Voltage Adjustment ......................................................................3-9
2.2 Fan Voltage Adjustment (For LV-7350)....................................................3-9
2.3 Fan Voltage Adjustment (For LV-7355)....................................................3-10
2.4 Pedestal Adjustment ................................................................................3-10
2.5 NRS Adjustment ......................................................................................3-11
2.6 Signal Center Adjustment ........................................................................3-11
2.7 Black Level Adjustment ...........................................................................3-12
2.8 PC Offset Adjustment ..............................................................................3-12
2.9 PC Gain Adjustment ................................................................................3-13
2.10 AV Gain Adjustment ..............................................................................3-14
2.11 Common Center Adjustment .................................................................3-14
IV

2.12 Gamma Shift Adjustment .......................................................................3-15
2.13 White Balance Adjustment .....................................................................3-15
2.14 Note on White Uniformity Adjustment ....................................................3-15
3. OPTICAL ADJUSTMENTS ..............................................................................3-16
3.1 Contrast Adjustment ................................................................................3-16
3.2 Condenser Lens Adjustment ...................................................................3-17
3.3 Condenser Lens-Out Adjustment ............................................................3-18
3.4 Relay lens-Out Adjustment ......................................................................3-19
3.5 Optical Adjustment Setting ......................................................................3-20
4. TEST POINTS AND LOCATIONS ...................................................................3-21
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 Problems ...............................................................................4-8
2. CONTROL PORT FUNCTIONS ......................................................................4-9
2.1 System Control & I/O Port Table (IC801) ................................................4-9
2.2 IC Bus I/O Expander (IC1851) Port Functions .........................................4-11
2.3 IC Bus I/O Expander (IC2181) Port Functions .........................................4-11
2.4 IC Bus DA Converter (IC1831) Port Functions ........................................4-11
2.5 IC Bus DA Converter (IC2161) Port Functions ........................................4-12
2.6 IC Bus DA Converter (IC1581) Port Functions ........................................4-12
2.7 IC Bus DA Converter (IC2571) Port Functions ........................................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-7350U/E, LV-7355U/E)...........................................A3
Power Supply Lines (LV-7350U/E, LV-7355U/E)..............................................A4
Schematic Diagrams.........................................................................................A5
Printed Wiring Board Diagrams.........................................................................A12
V

Part 1
General
Information

1. FEATURES
1.1 Development Objectives
This projector has been developed as a successor to the Multimedia Projectors "LV-
7345/LV-7340" featuring a 0.9-inch XGA panel, which were put on the market last
September. It has the Canon's latest technologies and various new features to expand
Canon's XGA ultra-portable LCD projector product offerings in the market.
The LV-7355/LV7350 incorporates Canon's latest technologies, such as new wide
lens, vertical/horizontal keystone correction, wireless function (option), the latest LCD
panel, and the Turbo Bright System, to cover a wide range of fields, such as offices and
education.
1.2 Product Overview
These products are ultra-portable models of Canon LV series LCD projectors. The
high-resolution model with a 0.9-inch XGA LCD panel is equipped with a ×1.5 wide
zoom lens, which has the best magnification in the industry for the current models. The
projection distance range has been expanded so that the projector can be installed
closer to the screen.
The Canon's unique power-driven Turbo Bright System incorporates an LCD panel
with an improved transmittance to increase intensity and provide the top-level
brightness at its class.
In addition, it has a vertical/horizontal keystone correction function and can be
installed at various places by using an optional wireless LAN kit (LV-WI01). This
product is designed as a more user-friendly presentation tool by using the conventional
PC card kit (LV-MC01).
Users can select one of two models: a high-end model with an LCD panel with a
microlens and an inexpensive model with an LCD panel with no microlens.
Part 1: General Information
1-1
Fig. 1-1 LV-7355 External View (LV-7350 is identical to the LV-7355 except the logo)

1.3 Major Features
●Newly-developed wide zoom lens
The wide projection lens is equipped with a ×1.5 power-driven zoom that is the highest
magnification in the industry by using the Canon's latest optical design technology.
The 100" screen size is supported in the range 2.8 to 4.2 m.
●Equipped with Vertical/Horizontal Keystone function
Smoothly corrects for "keystone" effect, giving a square image with up to 20 degrees
vertically and up to 10 degrees horizontally.
It is combined with the effects of the wide lens to reduce installation space.
●XGA real projection, SXGA high-quality compression display
A 0.9" LCD panel with 1024 ×768 pixels is used to achieve contrast of 350:1.
XGA real projection and high-quality SXGA projection are implemented by digital
compression.
●Power-driven Turbo Bright System.
Highest brightness is realized by the Canon's own Turbo Bright System: LV-7355:
2200 ANSI lumen; LV-7350: 1800 ANSI lumen. The LCD panel and optical system
have been improved to increase intensity.
●DVI-I connector equipped as standard
The DVI-D connector has been changed to the DVI-I connector. Analog input is made
possible through the same connector.
●Wireless imager (option)
The projector can communicate between the PC using the optional wireless imager
LV-WI01. Still image data can be transferred at the maximum speed of 11 Mbps.
Part 1: General Information
1-2

Part 1: General Information
1-3
2. LV-7350/LV-7355 SPECIFICATION
2.1 Type Ultra-portable LCD Projector
2.2 LCD panel
1. Type: Polysilicon active matrix TFT
LV-7355: with microlens,
LV-7350: with no microlens
2. Size/number: 0.9 model (4:3 aspect ratio) × 3
3. Number of pixels: 1024 ×768 pixels (XGA)
4. Contrast ratio: 350:1 (all white: all black)
2.3 Optical box
1. Type: Dichroic mirror separation/prism synthesis system
2. Light source: 200W UHP lamp
3. Projection lens configuration: 10 groups, 12 lenses
4. F value/focal length: F1.7 to 2.44, f25.7 to 37.9mm
5. Zoom magnification: ×1.5
6. Zoom/Focus: Automatic
2.4 Mechanism
1. Lens shift: 9:1
2. Elevation mechanism: UP by 15.6 degrees

2.5 Video/audio
1. Brightness: LV-7355: 2200/1900 ANSI lumen, illuminance
ratio 85%
LV-7350: 1800/1500 ANSI lumen, illuminance
ratio 85%
2. Correct projection distance: 1.1 to 8.4 m
3. Size of projection image: 28" to 300"
4. Resolution of display supported: SXGA (compression)/XGA/SVGA/VGA
5. Digital zoom magnification: × 35% to × 49
(For XGA input. It can be changed to 25%
according to input signal.)
6. Keystone correction range: Vertical: ±20 degrees; Horizontal: ±10 degrees
7. Horizontal resolution (Video input): 800 TV lines
8. Scanning frequency: 15KHz to 100KHz for horizontal sync.
50Hz to 100Hz for vertical sync.
Up to 140MHz for dot clock
9. Color system: NTSC/PAL/SECAM/NTSC4.43/PAL-M/PAL-N
10. Built-in speaker: 4cm ×3cm, 1W monaural
2.6 Connectors
1. Digital RGB input: DVI-I 29 pins
2. Analog RGB input: Mini D-sub 15-pin, DVI-I 29-pin (common)
3. Video input: Video: RCA × 3 (Use three RCA terminals for
component input and 1 terminal for composite
input.)
Mini DIN 4-pin: S-Video
4. Audio input: RCA × 2, stereo mini jack
5. Audio output: RCA × 2
6. Mouse control: Mini DIN 8 pins, USB type (type B)
Part 1: General Information
1-4

2.7 Standard
1. Dimensions (W ×H×D) 331.5mm ×89.5mm ×244.1mm
(Not total length): (excluding projections)
2. Net Weight: 4.3Kg
3. Rated supply voltage: Japan: 100V/United States: 100-120V/
Europe: 200-240V, 50/60Hz
4. Power consumption: 300W
5. Noise: 37dB
6. Operating/Storage temperature: 5 to 35ºC/–10 to 60ºC
2.8 Accessories
1. Remote control
• Power 3.0 VDC, two AAA alkali cells (supplied)
• Range Approx. 5 m (Front of receiver)
• Dimensions (W ×H ×D) 5.5cm ×3.4cm ×19.2cm
• Weight 165 g
• Maximum laser output 1 mW
(Class 2 laser product, IEC60825-1 Am.1 1997)
• Laser wavelength 650 ± 20 nm
2. Computer connection cable (Dsub 15-Dsub 15)
Used to input an analog RGB video signal from a PC.
3. DVI/VGA conversion adapter
Used to connect a Dsub 15 terminal to the DVI-I terminal of the projector.
4. Mouse control cable
For PS/2 port
5. Lens cap
Used to protect the lenses against dirt and dust when they are not used or are being
transported.
6. Soft carrying case
Used to prevent contamination when the projector is being transported or not in use.
7. Power cord
Connect the power cable into the socket in the main unit and supply voltage from an
outlet.
(A power cord for Japan, United States or Europe is supplied.)
Part 1: General Information
1-5

2.9 Replacement Part
1. Canon replacement lamp (LV-LP11)
Replace the lamp when the replacement time indicator comes on.
Recommended lamp replacement time: 1000 hours
2.10 Options
1. Wireless imager LV-WI01 (Wireless LAN card included)
Connect the wireless imager to the digital RGB input terminal and install it on the
projector.
It can send video signals wirelessly from a personal computer to the projector for
display.
2. Media card imager kit LV-MC01
Connect this kit to digital RGB input and install it on the projector.
Presentation data recorded on a CF card can be directly projected.
3. DVI computer connection cable LV-CA29
Used to input a digital RGB video signal from a computer, etc.
●Mouse control cable (serial) LV-CA26
●Mouse control cable (Mac) LV-CA27
●Mac conversion adapter LV-AD02
●Canon ceiling mount fitting LV-AD02
Hanger for ceiling mount
Part 1: General Information
1-6

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 Terminals of projector: See the attached sheet
(Owner’s Manual, page 11).
3.4 Configurations of the terminals: See the attached sheet
(Owner’s Manual, page 44).
3.5 Operation of remote control: See the attached sheet
(Owner’s Manual, page 14).
3.6 Operating range: See the attached sheet
(Owner’s Manual, page 15).
Part 1: General Information
1-7

Part 1: General Information
1-8
4. COMMENTARY
4.1 Optical System
High brightness and high contrast are implemented by a newly designed wide zoom
lens and an improved LCD panel, combined with the Canon's unique Turbo Bright
System.
With these techniques, the LV-7355 with a microlens has 2200 ANSI lumen and the
LV-7350 without a microlens has 1800 ANSI lumen.
●× 1.5 wide zoom lens
A wide zoom lens with a short focal length of 25.7 mm and high magnification of ×1.5 is
designed as a bright large-aperture projection lens (F1.7).
The optical system has 10 groups of 12 lenses, including 6 groups of zoom lenses.
All lenses are made from lead-free glass.
●LCD panel
The LCD panel has a higher open area ratio than conventional ones by improving
production technologies to increase efficiency of using light. This results in increased
light intensity compared with previous models.
4.2 Mechanism
●Cooling mechanism
This model has a higher light intensity and a low fan noise of 37 decibels, which is the
same as the previous models, by improving air flow and changing the fan shape.
The air flow has been optimized and cooling efficiency has been increased by
redesigning the air inlet of the projector. Cooling efficiency can be improved and noise
is reduced while the fan speed is reduced.
In addition, the air intake fan has been redesigned to suppress vibration and reduce
noise.
This projector reduces fan noise automatically by decreasing fan speed at low
temperatures using temperature sensors.

4.3 Design
The high-quality and all-round "Stylish Form" fits various office environments and
presentation scenes.
●High quality design
• Top panel
The operation panel is designed to be round with a curved relief and have
Caribbean water blue color. The "circle" symbolizes "harmony, link, bond and
communication", and "water" symbolizes "light, life, purity and transparency". It
evokes a sophisticated image, high quality and is user-friendly so that it can be
used in various places.
This projector has a wide zoom lens and a vertical/horizontal keystone function to
project large images at a near distance in a diagonal direction. This design is also
symbolized by the "circle".
• Front panel
The exhaust port that exhausts heat and causes noise has been laid out at the
front panel far away from audience.
In addition, the exhaust port is covered with a punching metal instead of the
previous blind-type louver to improve the appearance of the front panel and give an
impression of sophisticated image.
• Rear panel
The connectors and speaker have been laid out systematically as an interface so
that they look sophisticated.
• Operation panel
Operation keys are laid out around the Set button.
The keys are laid out in a circle to provide high operability and good design.
• Lens
A metal ring is attached to the lens to give an impression of a sophisticated image of
Canon lenses.
It protects the lens, while giving an impression of a high-quality optical equipment.
●Interface design
The Turbo Bright System, keystone, power-driven zoom and focus can be operated by
pressing a single button on a remote control. They can be operated directly without
need to select a function on the menu screen.
• Long life design
A material with a color that is not faded easily by stain or discoloration has been
selected. It is designed to be in harmony with the atmosphere of many installation
locations, and gives a feeling of high quality so that it can be used for a long period
of time.
Part 1: General Information
1-9

5. CONNECTING
5.1Connecting to computer: See the attached sheet
(Owner’s Manual, page 12).
5.2Connecting to video equipment: See the attached sheet
(Owner’s Manual, page 13).
Part 1: General Information
1-10

6. SETTING-UP THE PROJECTOR
6.1Positioning projector: See the attached sheet
(Owner’s Manual, page 9).
6.2Adjustable feet: See the attached sheet (Owner’s Manual, page 9).
6.3Mounting lens cover: See the attached sheet
(Owner’s Manual, page 10).
6.4Moving projector: See the attached sheet
(Owner’s Manual, page 10).
Part 1: General Information
1-11