2-3
CHAPTER 2. TECHNICAL DESCRIPTION
2.2 Signal Processing
Fig. 3 Signal System Block Diagram
2.2.1 System Control
The CPU on the main PCB ass’y controls the EF lens (motor, shutter), operation switch receiver, USB
communication and flowing circuits.
• TG: Creation of the CCD drive pulse
• CDS, A/D: CCD signal processing and conversion of the digital data
• LCD Driver: Driving the LCD
• FLASH MEMORY: Firmware memory
• DSP: Picture processing
• RTC: Clock count for watch
• AF Support LED: AF auxiliary, self-timer and red-eye protection also serves as a lamp
• Electric Flash: Flash and charging circuit
CDS, A/D
LCD
Driver
CCD
Sensor
TG
Drive
Pulse
HD, VD
CLK
EF LENS
Motor
Driver
AF Support LED
FINDER LED
Electric FLASH
CF card
LCD
Video
Amp
RTC
MIC
FLASH MEMORY
AUDIO AMP
DSP
CPU
SW
DIAL
KEY
MAIN PCB ASS'Y
SDRAM
USB
SPEAKER
VIDEO OUT
AUDIO OUT
Summary of Contents for DIGITAL IXUS 400
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Page 103: ...PowerShot S400 DIGITAL IXUS 400 IXY DIGITAL 400 Pg4 1 2 3 4 5 6 7 8 9 10 11 12 OPTICAL UNIT ...
Page 126: ...C CANON INC 2003 01 APRIL 2003 3 3 OPTICAL MODULE UNIT ...
Page 127: ...C CANON INC 2003 01 APRIL 2003 3 4 OPERATION KEY UNIT ...
Page 128: ...C CANON INC 2003 01 APRIL 2003 3 5 BATTERY BOX UNIT ...
Page 129: ...C CANON INC 2003 01 APRIL 2003 3 6 CF UNIT ...
Page 131: ...PowerShot S400 DIGITAL IXUS 400 IXY DIGITAL 400 Auto Focus Chart 1 ...
Page 132: ...Dimensions 1 Dimensions 1 85 7mm 50 5mm 30 1mm 64mm 38mm 22mm ...
Page 133: ...PowerShot S400 DIGITAL IXUS 400 IXY DIGITAL 400 Auto Focus Chart 2 ...
Page 134: ...Dimensions 2 229 4mm 135 2mm 80 5mm 172mm 101mm 60mm ...
Page 135: ...PowerShot S400 DIGITAL IXUS 400 IXY DIGITAL 400 Auto Focus Chart 1 ...
Page 136: ...Dimensions 1 Dimensions 1 85 7mm 50 5mm 30 1mm 64mm 38mm 22mm ...
Page 137: ...PowerShot S400 DIGITAL IXUS 400 IXY DIGITAL 400 Auto Focus Chart 2 ...
Page 138: ...Dimensions 2 229 4mm 135 2mm 80 5mm 172mm 101mm 60mm ...