CHAPTER 2
2 - 23
COPYRIGHT
©
2001 CANON INC. CANOSCAN D1230U/D2400U REV.0 MAR. 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
Figure 2-23
VI. POWER SUPPLY
DC power is supplied from the supplied AC adapter. Through power regulator, four DC power
sources (+3.3V, +5V, +12V and +15V) are used in the circuit. +3.3V and +5V are supplied for
the digital circuit and linear chip, +15V is for the CCD PCB, and +12V is for the motor driver
and scanning lamp.
12V
AC Adapter
12V to 15V
Step up switching
Regulator
12V to 5V
Linear
Regulator
Motor Driver
Main PCB
CCD PCB
15V to 12V
Linear
Regulator
CCD
Analog IC
Drive
Motor
PWM
PWM
Inverter
Scanning Lamp
Inverter
FAU Lamp
FAU
+5VRegulator
+3.3V Regulator
Digital
Circuit
IR LED