Block - Canon GP605 Service Manual

Output by scanner clock, pulses
Output by printer clock, pulses
Frame erasing on scanner input data
(by scanner clock pules)
1. Original frame erasing
2. Book frame erasing
3. Hole image erasing
Frame erasing on data after image
memory output
(by printer clock, pulses)
1. Sheet frame erasing
2. Binding
To laser driver
PCB
Converts binary data of
600×600-dpi into 1200×600-dpi.
COPYRIGHT © 1999 CANON INC. CANON GP605/605V REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Analog image processing block
CCD PCB
Even-numbered/odd-numbered pixels
IP PCB
Shading correction
Line conversion
Even-numbered/odd-numbered line
Enlargement/reduction
Test pattern
(main scanning direction)
Edge emphasis
Density processing
Binary processing (text, text / photo mode)
Binary processing
(print photo mode)
Frame erasing
Frame erasing
Rotation
Smoothing
Memory control
Black pixel count
Figure 4-301 Functional Block Diagram
B.
Turned to two channels for laser A and B
Original orientation detection PCB
PDL board
Enlargement/reduction
(main / sub scanning direction)
Line conversion
Compression /
de-compression
DRAM
Memory board
Image Processing Functional

Block

MFC PCB
Data transfer control
Hard disk
Image server
4-7