Canon PowerShot G3 User manual

Application
This manual has been issued by Canon Inc. for qualified persons to learn technical theory, and
repair of the products.
Corrections
This manual could include typographical errors or technical inaccuracies due to improvements or
changes in the products. When changes occur in applicable products or in the content of this manual,
Canon will release service manual report as the need arises. In the event of major changes in the
contents of this manual over a long or short period, Canon may issue new editions of this manual.
The following paragraph does not apply to any countries where such provisions are inconsistent
with local law.
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The product names and company names described in this manual are the registered trademarks of
the individual companies.
Copyright
This manual is copyrighted with all rights reserved. Under the copyright laws, this manual may not
be copied, reproduced, published (including on the World Wide Web) or translated into another
language, in whole or in part, without the written consent of Canon Inc..
Copyright © 2002by Canon Inc.
CANON INC.
Digital Imaging Products Service Dept.
30-2, Shimomaruko 3-Chome, Ohta-ku,
Tokyo 146-8501, Japan

SAFETY PRECAUTIONS
The following precautions should be observed when servicing.
1. Since many parts in the unit have special safety-related characteristics, always use genuine CANON replacement parts.
Especially critical parts in the power circuit block should not be replaced with other makes.
Critical parts are marked with !in the schematic diagrams.
2. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged
by the short circuit.
3. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed.
4. After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards.
4-1 Leakage Current Cold Check
1) Unplug the AC cord and connect a jumper between the two prongs on the plug.
2) Measure the resistance value, with an ohmmeter, between the jumpered AC plug and each exposed metallic cabinet part
on the equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path to
the chassis, the reading should be between 1MΩand 5.2MΩ. When the exposed metal does not have a return path to the
chassis, the reading must be ∞.
4-2 Leakage Current Hot Check
1) Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
2) Connect a 1.5KΩ10 watt resistor, paralleled by 0.15µF capacitor, between each exposed metallic parts on the unit and a
good earth ground such as a water pipe, as shown in the figure below.
3) Use an AC voltmeter, with 1000Ω/volt or more sensitivity, to measure the potential across the resistor.
4) Check all exposed metallic parts of the cover (Cable connection, Handle bracket, metallic cabinet.
Screwheads, Metallic overlays, etc), and measure the voltage at each point.
5) Reverse the AC plug in the AC outlet and repeat each of the above measurements.
6) The potential at any point should not exceed 0.75V RMS.
A leakage current tester (FLUKE MODEL : 8000A equivalent) may be used to make the hot checks.
Leakage current must not exceed 0.5 milliamp.
In case a measurement is outside of the limits specified, there is a possibility of a shock hazard, and corrective action must
be taken before returning the instrument to the customer.
Water pipe
(Earth Ground)
1.5KΩ
0.15µF
Test all
exposed
metal parts
Figure. 1 Leakage Current Hot Check
AC OUTLET
AC VOLTMETER
DEVICE
UNDER
TEST

1 Development Background
1-1 Development Objectives --------------------------------------------------------------------------------------------------- 1-1
1-2 Product Concepts ------------------------------------------------------------------------------------------------------------ 1-1
1-3 Design Concepts ------------------------------------------------------------------------------------------------------------- 1-5
1-4 Spec. comparison between PS G3 and PS G2 -------------------------------------------------------------------------- 1-6
2 Features
2-1 High Image Quality --------------------------------------------------------------------------------------------------------- 1-7
2-2 Full Features ----------------------------------------------------------------------------------------------------------------- 1-9
2-3 Operation Ease --------------------------------------------------------------------------------------------------------------1-18
2-4 System Accessories --------------------------------------------------------------------------------------------------------1-21
2-5 Application Softwares -----------------------------------------------------------------------------------------------------1-23
3 Exterior
3-1 Exterior Photos ------------------------------------------------------------------------------------------------------------ 1-28
3-2 6-dimensional diagram --------------------------------------------------------------------------------------------------- 1-29
3-3 Nomenclature ---------------------------------------------------------------------------------------------------------------1-30
3-4 Display Panel ---------------------------------------------------------------------------------------------------------------1-31
3-5 UI Display -------------------------------------------------------------------------------------------------------------------1-32
4 Specifications
4-1 Camera Specifications -----------------------------------------------------------------------------------------------------1-34
4-2 System Requirements ------------------------------------------------------------------------------------------------------1-47
4-3 Accessory Specifications ------------------------------------------------------------------------------------------------- 1-48
5 System
5-1 Accessory Compatibility ------------------------------------------------------------------------------------------------- 1-49
5-2 System diagram ------------------------------------------------------------------------------------------------------------ 1-51
6 Additional
6-1 iSAP (Intelligent Scene Andlysis based on photographic Space) Technology ------------------------------------1-52
CHAPTER 1. GENERAL DESCRIPTION
OF PRODUCT
CONTENTS
*Please refer to Technical Guidance for PowerShot G1 (TI-00903) and PowerShot G2 (TI-00901) aiso.

1-1
1 Development Background
1–1 Development Objectives
The PowerShot G2, which went on sale in the fall of 2001 as the successor to the PowerShot G1, won very high
acclaim from the market for its high degree of perfection covering “picture quality”, “functionality” and “design”.
As a result, the camera achieved a stable demand from both advanced “artistically oriented” amateurs and
industry users looking for “dependability”. Therefore, it is vital that the next model to the PowerShot G2 aim for
even more enhanced performance while continuing this concept.
With this background in mind, we initiated development of the PowerShot G3, as the top model of the PowerShot
series, with a new built-in large-diameter 4x zoom lens and DIGIC (Digital Imaging Processor) to get the most
out of the enhanced high picture quality generated by the 4-megapixel CCD and the primary color filter.
Furthermore, the PowerShot G3 will aim for a different evolutionary path by adding bracketing features and
end-sync photography to provide “the finest picture quality with the foremost functions”.
1–2 Product Concepts
The PowerShot G3, successor to the PowerShot G2, aims to be the top in its class in terms of picture quality by
employing a 1/1.8-inch, 4-megapixel-class CCD and incorporating a newly developed f/2.0 (wide-angle) “large-
diameter lens” with four-times zoom capability and the “DIGIC (Digital Imaging Processor)”, which provides
enhanced high-quality image processing functions. In terms of function, the product concept has included
specifications so that advanced amateurs and semi-professionals can take full advantage of sophisticated camera
techniques.
The PowerShot G3 is also equipped with the “My Camera” feature of the PowerShot S30/S40 and IXY Digital
300a models, and adds new “creation of on-camera content” capability.
PowerShot G2
+
Full Features
Operation Ease
Application Software
System Accessories
High Image Quality
Highresolution4xzoomlens
DIGIC(DigitalImagingprocessor)
Electronicdial
Functionbutton
New ZoomBrowser EX
NewFile Viewer Utility
Automatic vertical/horizontal detection by SI sensor
Voluntary settings of AF frame
Bracketings features
NewWide/Tele convertor
Compatiblewith Macro Twin Light MT-24EX
PowerShot G3

1-2
High Image Quality
N: New features unique to the PowerShot G3 (autumn 2002 model)
U: Updated features from the PowerShot G2 (already equipped on other models)
N - High-resolution large-aperture (f/2.0-3.0) 4x zoom lens (35 mm film equivalent: 35 to
140 mm)
N - High definition and fast processing with the newly developed “DIGIC (Digital Imaging Processor)”
N - Nine-position high-precision white balance (auto + 6 preset positions + 2 manual positions)
U - Super intelligent (SI) sensor improves precision of AE/AF/AWB
- High-resolution, 1/1.8-inch CCD with 4 million camera effective pixels (4.1 million pixels in
total)
- Primary color filters for excellent color reproduction
- Wide range of ISO-equivalent settings (Auto/ISO 50/100/200/400 equivalent)
- Multi-step iris control and elegant blur owing to iris type aperture
- RAW mode recording
- Support for Exif 2.2
N- Macro shooting range of 5 centimeters in wide-angle mode and 15 centimeters in telephoto
N- Insertion of neutral density (ND) filter makes it possible to produce blur effects and to take
flash photos in macro mode
N- Selectable between evaluative metering, center-weighted average metering and spot metering
(linked to AF frame/fixed to center)
N- AF range frame can be set arbitrarily
N- Bracketing options (AE / Focus)
N- Interval shooting function for fixed-point observation over long periods
N- Wireless controller with settable operation delays (instantaneous / 2-second delay /
10-second delay)
N- Selectable of first-curtain sync and second-curtain sync flash (built-in flash / external flash)
N- Flash output can be adjusted manually (built-in flash / external flash)
N- Slave function of external flash units can be used
N- 2 custom mode positions are included on mode dial to allow users to preset photo
parameters freely
N- “Custom” position, allowing users to preset parameters, added to the photo effect positions
as a photo effect (vivid color, neutral color, low sharpening, sepia, black and white)
N- Settable display times for rec review (Off, 2 to 10 seconds)
N- Storage in RAW mode can be selected after recording an image
N- Unwanted scenes can be deleted in movie playback mode
N- Continuous movie recording and playback with audio with long filming times (three minutes)
(selectable from QVGA and QQVGA)
N- My Camera function for creating on-camera content
U- 1/1250 second shutter speed with open aperture
U- Built-in flash with 5 controls (slow sync)
U- On/Off selection of AF-assist beam
Full Features

1-3
Operation Ease
U - Digital zoom continuously changes the field of view (approx. 3.6x ; approx. 14x
magnification when combined with optical zoom)
U - Super intelligent (SI) sensor automatically detects vertical or horizontal photography
U - Magnified playback for easy confirmation of images (from approximately two times to 10x
zoom magnification)
U - Next frame, previous frame, fast forward, rewind, first frame and last frame end available during
movie replay
U - Supports DPOF format slideshows and image transfers
U - Sound annotation function (sound memos up to 60 seconds in length can be recorded during
replay)
U - Direct print function for card photo printers (CP-100/10) and Bubble Jet printers
(BJ 895PD, BJ 535PD and BJ F890PD)
U - Self-timer photography (selectable from two or 10 seconds)
- “High speed” (2.5 images/sec) or “normal” (1.5 images/sec) select able as continuous shooting
modes
- Total of 13 image quality modes (4 recording pixels x 3 compression ratio, RAW)
- Histogram displays during rec review function and replay
- Manual settings (aperture-priority AE, shutter speed-priority AE, manual focus*, manual
exposure, flash compensation, exposure compensation)
- AF modes that permit switching the ranging points (three points, available with continuous AF
and single AF)
- AE lock / FE lock functions
N - User interface makes a diverse set of functions easy to understand (electronic dial,
independent mode dial and mode lever, large-sized display panel)
N - Driver-less computer connections with Picture Transfer Protocol (PTP) support
U - Change to shooting mode by pressing the shutter button (in replay mode)
U - USB interface accepts multipurpose connectors
U - Independent white balance/exposure compensation controls and Function button improve
operability
U - Manual focus adjustment with better usability
U - One-touch reset of all settings
- (New) digital signal processing IC + buffer memory for stress-free operation
- Shutter click sound similar to that of a film-based camera
- Vari-angle LCD monitor
- Immediate switching between shooting and replay
- Fast image transfer (replay mode)
- Video output system (PAL/NTSC) can be switched by user
- Complies with the CF Type II standard, allowing use of high-capacity storage media
- Ability of volume setting with each operation sound
- Grip molded into body of camera and a strap attached to the camera at both ends allow user to
hold camera securely
- UI supporting twelve languages
- Large capacity lithium ion rechargeable battery (In addition to the BP-511, the BP-512,
which has a different shape, can also be used)

1-4
System accessories
Application software
N- New Wide Converter* and Tele-converter* configurations
* New lens adapter is required for mounting
N- New fast image storage CF card (256 MB)
N- Support for EOS-type EX Speedlites (including the MT-24EX Macro Twin Lite)
N- Various Speedlite accessories (such as transmitters and camera shoe cord 2) can be used
N- ZoomBrowser EX 4.0 (Win) made more ergonomic
(ImageBrowser 2.7 (for Mac) is as in the past)
- Photorecord 1.6 (Win) for easy layout and printing of many pictures
- PhotoStitch 3.1 for creating panoramic pictures with precision
- RemoteCapture 2.6 for remote picture-taking through a PC (permits display of the Finder
screen on the PC)
N- New File Viewer Utility 1.0 application for processing RAW images
- TWAIN Driver 5.0 / WIA Driver 5.0 (Win)
- USB Mounter 1.8 (Macintosh) that allows the system to handle the camera as a card reader
N- CP-100/CP-10 2.1 Printer Driver
- Adobe Acrobat Reader 4.0 for Printer Driver’s manual
- Third-party software of established reputation
Apple QuickTime 5.0 (for creating movies/QVTR files)
Adobe Photoshop LE (for processing/editing images)