5Printer Unit Output Image Processing; Printer Unit Output Image Processing - Canon iR4570 Series Service Manual

Chapter 4
Printer unit image
processing block
Enlargement/
reduction
Rotation
Integration
to printer unit output image processing block
F-4-13

4.5.5 Printer unit Output Image Processing

iR2270 / iR2870 / iR3570 / iR4570
The main controller processes the image data coming from the printer unit for output to the printer unit.
Compression/expansion/editing block
Binary density conversion
Enlargement/reduction
Smoothing
Thickening
To DC controller PCB
F-4-14
4-14
Main controller PCB
PDPDL image
processing block
Compression
Expansion
Main controller PCB
For PDL data,
when fine line
processing is ON
SDRAM
HDD
0006-6715