Canon Image Reader-A1, Service Manual

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COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON iR5000i/iR6000i REV.0 JUNE 2001
CHAPTER 2 MAIN CONTROLLER
2-12 S
3. Flow of Image Data
3.1 Flow of Image Data During Copying
3.1.1 Local Copying
Local copying occurs when the machine is selected as the printer on its control panel.
Data flows as shown in local copying mode. All data is first written to the hard disk, and
is read and sent to the printer unit page by page until all copying jobs end; in other words,
steps (6) through (10) in the figure are repeated until all jobs are done.
F02-301-01
Page memory
for reading
Page memory
for printing
Read-in image
processing block
Black-and-white
compression
circuit
extension circuit
Print image
processing block
Reader unit
Printer unit
Main memory
Main memory
Compressed
data
Compressed data
Compressed data
Compressed
data
Binary
Binary
Binary data
Binary Compressed
data
Binary data
Binary data
Binary data
8-bit (1)
(2)
(3)
(4)
(7)
(5)
(6)
(8)
(9)
(10)
System controller PCB Image processor
PCB
HDD
Compressed data