Canon fb1210u 服务手册
CHAPTER 2
2 - 22
COPYRIGHT
©
2000 CANON INC. CANOSCAN FB1210U REV.0 APR. 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
Figure 2-19
12V
AC Adapter
Protection
Circuit
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
12V
Inverter
Scanning Lamp
Inverter
FAU Lamp
x 2
FAU-S11
VI. POWER SUPPLY
DC power is supplied from a supplied AC adapter. Through power regulator, three DC power
sources (+5V, +12V and +15V) are used in the circuit. +5V is supplied for the digital circuit
and linear chip, +15V is for the CCD PCB, and +12V is for the motor driver and scanning lamp.
Protection circuit is used between the AC adapter and regulator to prevent over voltage, over
current or reverse polarity.
sources (+5V, +12V and +15V) are used in the circuit. +5V is supplied for the digital circuit
and linear chip, +15V is for the CCD PCB, and +12V is for the motor driver and scanning lamp.
Protection circuit is used between the AC adapter and regulator to prevent over voltage, over
current or reverse polarity.