Power Supply - Canon CANOSCAN D1230 series Service Manual

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
©
COPYRIGHT 2001 CANON INC. CANOSCAN D1230U/D2400U REV.0 MAR. 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
Main PCB
+3.3V Regulator
+5VRegulator
12V to 15V
Step up switching
Regulator
12V to 5V
Linear
Regulator
Motor Driver
PWM
PWM
Inverter
Inverter
Figure 2-23
Digital
Circuit
15V to 12V
Regulator
Analog IC
Scanning Lamp
FAU Lamp
IR LED
CHAPTER 2
CCD PCB
Linear
CCD
Drive
Motor
FAU
2 - 23