
2-2
CHAPTER 2. TECHNICAL DESCRIPTION
2. Outline of Circuits
2.1 Power Supply Control
The power supply is controlled by the CPU mounted on the MAIN PCB ASS’Y.
2.1.1 Power Supply Block Diagram
Fig. 2 Power System Block Diagram
BATTERY
DC/DC
CONVERTER
CPU
Reg
Reg
Reg
VBATT
FUSE
OUTPUT
1, 2
VDD2
VDD3
(12V)
(13.5V) LCD Back Light
VEE2
OUTPUT 3
OUTPUT 4
(3.3V) for RTC
Reg
for System Control
for Image
Process
(CCD etc.)
for LCD
E1, E2, E3
E21
MAIN PCB ASS'Y
VCC1
(3.3V)
VCC1A
(3.3V)
VCC1SD (2.5V)
VCC1L
(1.5V)
VCC2HDR (4.75V)
VCC2AFE (3.3V)
VDD (15V)
VL (-7.5V)
VBATT
for Motor Drive
VCC1A-3 (3.0V) for VIDEO OUT,
AUDIO OUT, LCD
2.1.2 Power Control Sequence
Main Switch ON (E1)
Shooting Mode
Playback Mode
LCD OFF
(E2)
LCD ON
(E2, E3)
Audio/Video
out (E2)
LCD ON
(E3)
Audio/Video
out (E2)
Содержание PowerShot S400 Digital Elph
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Страница 99: ...PowerShot S400 DIGITAL IXUS 400 IXY DIGITAL 400 Pg2 12 12 10 8 7 5 11 12 3 4 6 2 1 13 14 13 9 Internal Parts 1...
Страница 103: ...PowerShot S400 DIGITAL IXUS 400 IXY DIGITAL 400 Pg4 1 2 3 4 5 6 7 8 9 10 11 12 OPTICAL UNIT...
Страница 125: ...C CANON INC 2003 01 APRIL 2003 3 2 FLASH BASE UNIT FLASH BASE UNIT SOLDERING SIDE FLASH BASE UNIT COMPONENT SIDE...
Страница 126: ...C CANON INC 2003 01 APRIL 2003 3 3 OPTICAL MODULE UNIT...
Страница 127: ...C CANON INC 2003 01 APRIL 2003 3 4 OPERATION KEY UNIT...
Страница 128: ...C CANON INC 2003 01 APRIL 2003 3 5 BATTERY BOX UNIT...
Страница 129: ...C CANON INC 2003 01 APRIL 2003 3 6 CF UNIT...
Страница 131: ...PowerShot S400 DIGITAL IXUS 400 IXY DIGITAL 400 Auto Focus Chart 1...
Страница 132: ...Dimensions 1 Dimensions 1 85 7mm 50 5mm 30 1mm 64mm 38mm 22mm...
Страница 133: ...PowerShot S400 DIGITAL IXUS 400 IXY DIGITAL 400 Auto Focus Chart 2...
Страница 134: ...Dimensions 2 229 4mm 135 2mm 80 5mm 172mm 101mm 60mm...
Страница 135: ...PowerShot S400 DIGITAL IXUS 400 IXY DIGITAL 400 Auto Focus Chart 1...
Страница 136: ...Dimensions 1 Dimensions 1 85 7mm 50 5mm 30 1mm 64mm 38mm 22mm...
Страница 137: ...PowerShot S400 DIGITAL IXUS 400 IXY DIGITAL 400 Auto Focus Chart 2...
Страница 138: ...Dimensions 2 229 4mm 135 2mm 80 5mm 172mm 101mm 60mm...