COPYRIGHT
©
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
CHAPTER 2 MAIN CONTROLLER
2-18 S
5 New Functions

5.1 Hard Disk Spool

In hard disk spool, print data is not directly sent to memory for printing, but spooled on
the HDD before printing, thus releasing the application program running on the host PC
sooner than otherwise.
When this function is used, a print job from the PC is stored in the spool area of the
HDD. (The spool area is as large as about 300 MB.) Once spooled, the jobs are then sent to
the RIP processing block in the order they have been received.
The jobs are removed from the spool as they are printed, and as many as 100 jobs may be
spooled at a time.
The following diagram shows the flow of data, from spooling on the HDD to execution:
F02-501-01
Main controller PCB
De-compression
circuit
Printer unit
RIP
processing
block
Memory for
development
HDD
Spool area
Print
buffer
area
(1)PDL data
(2)PDL data
(3)PDL data (4)Image data
(6)Compression data
(5)Image data
(7)Binary data
(8)Binary data
(9)Binary data
(10)Binary data
(11)Binary data
(12)Image date
Page
memory
for printing

Network PCB

Print image
processing block
job 1
job 2
job n
Compression
circuit