Service manual

Chapter 2
2-41
2.6.3 System Controller (SCNT)
2.6.3.1 Outline
0008-2317
The following is the functional composition of the SCNT board:
F-2-57
T-2-10
T-2-11
2.6.3.2 Canon Advanced Printing TechnologyÅ@(CARPS)
0008-2319
Canon Advanced Raster Printing System (hereafter (CARPS) refers to a system of processing data in which printing speed is reduced and operation is made easier
for more user-friendly printing in a Microsoft Windows environment. In CARPS, the following takes place so as to generate output as fast and as easily as possible:
- Instead of converting the print data coming from the application into the printer's page description language (PDL), it turns it into resource data which is GDI-
IC Function
IC1 CPU (ASIC)
DRAM controller, image processing block, USB controller, LAN controller, reader unit control
IC2 FLASH ROM
program control, data retention
IC3 FLASH ROM
program control, data retention
IC301 LAN control
IC501 DDR memory
IC502 DDR memory
IC601 ADF motor driver
IC651 book mode motor driver
IC701 control panel controller
IC801 fax modem
IC1001 image processing controller
IC1002 flash ROM for image processing data storage
IC1101 ASIC for recording signal control
IC1201 clock IC communication block, recording signal processing block, image signal processing block
JackÅ@No. Function
JLBP1 DCNT board connector
JUSB1 USB terminal
JLAN1 LAN cable terminal
JETM1 not used
JBAT1 capacitor terminal
JPSU1 power board connection
JFAN1 fan connection
JAMTR1 CCD motor connection
JBMTR1 ADF, motor connection
JSPK1 speaker connection
JSNS1 power sensor/post-separation sensor
JOP701 control panel connection
JOP702 control panel connection
JNCU1 NCU board connection
IC1101
IC801
IC1001
IC1002
JUSB1
USB
CCD
LAN
JLAN1
JETM1
JBAT1
IC1201
IC2
IC3
JLBP1
CCD
DCNT
Borad
IC301
IC502
IC601
JAMTR1JFAN1
FAN Book
Motor
ADF
Motor
Speaker
SuperC Unit
JBMTR1 JSPK1 JSNS1
JNCU1
JPSU1
NCU Borad
IC651
IC701
JNCU2
IC501
IC1
Sensor control panel controller
NCU Borad
BATTERY
JOP701
JOP702
+24V
+3.3V
+5V
+13.5V