Canon PowerShot G5 Service Manual - Page 39

Functions of each unit, MAIN PCB ASS'Y, DC/DC CONVERTER PCB ASS'Y, TOP MODULE UNIT, EF FPC - flash

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CHAPTER 2. TECHNICAL DESCRIPTION 1. Functions of each unit 1.1 MAIN PCB ASS'Y 1) Driving the CCD Sensor. 2) Conversion of the image signal from the analog signal to the digital signal. 3) Controlling the power supply and the system by CPU. (Refer to Sections 2.1 and 2.2.) 4) Image processing, and reading and writing the image signal to and from the CF card using DSP. (Refer to Section 2.2.2.) 5) Video output. (Refer to Section 2.2.2.) 6) Microphone input and sound output. (Refer to Section 2.2.3.) 1.2 DC/DC CONVERTER PCB ASS'Y 1) Power supply drive (DC/DC converter). 2) Battery charging control circuit. 1.3 LCD PCB ASS'Y 1) Image display. 2) Backlight for LCD drive. 1.4 TOP MODULE UNIT 1) Operation switch, operation display and finder LED. 1.5 EF FPC 1) Flash control. 1.6 STJ PCB ASS'Y 1) Flash drive and charging circuit for the flash. TOP MODULE UNIT BUTTON PCB ASS'Y LCD PCB ASS'Y MAIN PCB ASS'Y DC/DC CONVERTER PCB ASS'Y Fig. 1 2-1 FLASH UNIT

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2-1
CHAPTER 2.
TECHNICAL DESCRIPTION
1. Functions of each unit
1.1
MAIN PCB ASS’Y
1) Driving the CCD Sensor.
2) Conversion of the image signal from the analog signal to the digital signal.
3) Controlling the power supply and the system by CPU. (Refer to Sections 2.1 and 2.2.)
4) Image processing, and reading and writing the image signal to and from the CF card using DSP.
(Refer to Section 2.2.2.)
5) Video output. (Refer to Section 2.2.2.)
6) Microphone input and sound output. (Refer to Section 2.2.3.)
1.2
DC/DC CONVERTER PCB ASS’Y
1) Power supply drive (DC/DC converter).
2) Battery charging control circuit.
1.3
LCD PCB ASS’Y
1) Image display.
2) Backlight for LCD drive.
1.4
TOP MODULE UNIT
1) Operation switch, operation display and finder LED.
1.5
EF FPC
1) Flash control.
1.6
STJ PCB ASS’Y
1) Flash drive and charging circuit for the flash.
Fig. 1
TOP MODULE UNIT
LCD PCB ASS'Y
BUTTON PCB ASS'Y
FLASH UNIT
DC/DC CONVERTER PCB ASS'Y
MAIN PCB ASS'Y