CHAPTER 2
VI. POWER SUPPLY
DC power is supplied from the supplied AC adapter. Through power regulator, four DC power
sources (+3.3V, +5V, +12V and +16.8V) are used in the circuit. +3.3V and +5V are supplied for
the digital circuit and linear chip, +5V is for the Analog IC and home position sensor, +16.8V is
for the CCD PCB, and +12V is for the motor driver and scanning lamp.
Main PCB
+3.3V Regulator
Digital Circuit
Home Position
12V12V+5V Regulator
Sensor
AC Adapter
Analog IC
CCD PCB
16.8V to 12V
12V to16.8V
LinearCCD
Linear Regulator
Regulator
Drive
Motor Driver
Motor
PWM
PWM
InverterScanning Lamp
FAU Lamp
Inverter
IR LED
FAU
Figure 2-19
COPYRIGHT é 2002 CANON INC. CANOSCAN 8000F REV.0 OCT. 2002 PRINTED IN JAPAN (IMPRIME AU JAPON)2 - 19 |