2-2
CHAPTER 2. TECHNICAL DESCRIPTION
2. Outline of Circuits
2.1 Power Supply Control
The power supply is controlled by the CPU and DSP mounted on the MAIN PCB ASS’Y.
2.1.1 Power Supply Block Diagram
Fig. 2 Power System Block Diagram
2.1.2 Power Supply Control Sequence
1) In the case of either "Battery is Installed" or External Power is Supplied to "DC-IN" connector;
2) In case that Dial Switch is in "LOCK" position when "Battery is Installed";
CPU activates the other main functions. (E0)
Operating the Dial Switch
Rec. Mode
Play Mode
1. Controls CCD (E2)
2. Controls LCD (E3)
3. Controls LCD backlight (E5)
1. Controls LCD (E3)
2. Controls LCD backlight (E5)
Battery charging operation starts when external power is supplied to "DC-IN" connector.
CPU
DSP
REG.
MAIN PCB ASS'Y
DC/DC CONVERTER
PCB ASS'Y
DC/DC
CONVERTER
E0 OUTPUT
E2 OUTPUT
E3 OUTPUT
E5 OUTPUT
VDD0_3.3V for System
VDD2_5.5V
VDD2_15V
VDD2_-7.5V
for CCD
VDD3_12V for LCD
VDD5_21V for LCD Backlight
BATTERY
CHARGE
CONTROL
D03
DC-IN
Q10
D04
E0 CONTROL
E2,E3,E5
CONTROL
Содержание PowerShot G2
Страница 18: ...1 17 3 2 6 dimensional diagram Unit mm inch 118 7 4 67 120 9 4 76 76 6 3 02 74 3 2 93 63 8 2 51 51 7 2 04 ...
Страница 120: ...PowerShot G2 Pg3 FLASH SPEAKER UNIT 6 8 5 3 7 2 4 1 ...
Страница 122: ...PowerShot G2 Pg4 REAR PLATE UNIT 1 2 3 6 5 4 7 ...
Страница 124: ...PowerShot G2 Pg5 BATTERY BOX UNIT 13 1 2 8 9 10 11 4 12 3 14 7 5 4 6 ...
Страница 126: ...PowerShot G2 Pg6 LCD HINGE UNIT 12 3 5 6 7 8 9 11 10 2 11 1 4 11 12 ...
Страница 136: ...PowerShot G2 Pg11 Fuse 2 1 DC DC CONVERTER PCB ASS Y ...
Страница 150: ...C CANON INC 2001 01 AUGUST 2001 5 3 3 CF UNIT ...
Страница 151: ...C CANON INC 2001 01 AUGUST 2001 5 3 4 TOP MODULE UNIT ...
Страница 152: ...C CANON INC 2001 01 AUGUST 2001 5 3 5 LCD PCB ASS Y ...
Страница 153: ...C CANON INC 2001 01 AUGUST 2001 5 3 6 BUTTON PCB ASS Y ...
Страница 154: ...C CANON INC 2001 01 AUGUST 2001 5 3 7 JACK PCB ASS Y ...
Страница 155: ...PowerShot G2 Auto Focus Chart WIDE TELE MID8 MID6 MID3 WIDE TELE MID8 MID6 MID3 128 00mm 95 00mm Dimensions ...