Service manual

CHAPTER 2

2 - 2

2000 CANON INC. CANOSCAN FB1210U REV.0 APR. 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)

ASIC

CPU

SRAM

ROM

DRAM

Motor

Driver

Analog IC

Home

Position

Sensor

Regulator

Button PCB

Start Button

Power LED

USB

Controller

Host Computer

USB Interface

+12V

AC Adapter

CCD PCB

Drive

Motor

Inverter

PCB

B. Electrical System

1. Outline

The scanner is equipped with CPU and USB controller. Host computer sends a command to

the ASIC via the USB controller and CPU, the CPU controls the whole electrical circuits and

image processing of the scanner. The image signals read by the CCD are converted into digital

data by analog IC. The digital data are then processed by the ASIC and output to the host

computer via USB interface.

Figure 2-2