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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 © 2001 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.
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
F04-701-01
CANON SmartBase PC1200s/iR1200s REV. 0 DEC. 2001
+5V
Sensor PCB
+8V
Contact sensor
Modular jack
*2
PCB
*1
*2
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Troubleshooting
