Canon SmartBase 1270D Service Manual page 194

CHAPTER 4 OPERATION
Power supply PCB
F1
NF
P1
Low-voltage power
supply circuit
+3.3 V circuit
+ 5 V circuit
+12 V circuit
+24 V circuit
+24V
+5V
+3.3V
DC controller PCB
Fan
Manual feed tray
paper sensor
• Cassette paper sensor
+3.3V
• Paper leading edge
sensor
• LGL paper sensor
4-32
COPYRIGHT © 2002 CANON INC.
To NCU PCB
F2
+3.3V
+3.3VS
+5V
+5VS
+12V
F101
+24V
+24V
+3.3V
*1 : Only if equipped with ADF functions.
*2 : Only if equipped with fax functions.
F04-701-01
2000 2000 2000 2000
Analog
+3.3V
processor
+8V
PCB
+3.3V
Laser
+5V
scanner unit
+24V
+24V
Solenoids
+24V
Main motor
+3.3V
Sensors
+5V
Control
+5VS
panel PCB
+3.3V
+3.3VS
NCU PCB
+12V
+24V
Reader motor
ADF unit
+24V
ADF motor
+5V
ADF sensors
+3.3VS
Printer controller
+5VS
PCB
+24V
Reader unit
slide detecting
switch
CANON SmartBase PC1210D/1230D/1270D REV. 1 MAR. 2002
+5V
Sensor PCB
+8V
Contact sensor
Modular jack
*2
PCB
*1
*2