Canon 1000 Service Manual page 98

3. OPERATION AND TIMING
m. IP Memory PCB
Since the CLC1000 uses four photosensitive drums, it temporarily stores image signals in image
memory.
The image signals (Y, M, C and text signals) from the scanner are sent to the IP memory PCB and
compressed to 1/6 the original size and stored in the image memory. The data is read according to the read
signal generated in relation to the ITOP signal and sent to the image processor after the UCR processing
block has generated the Bk signal.
The image signals from an external device are subjected to UCR processing without compression and
sent to the image processor PCB. (For this, the DRAM memory kit must be installed.)
IP memory PCB
Image memory
3-54
COPYRIGHT © 2001 CANON INC.
Image from scanner
R,G,B
Image processor PCB
Text signal
Text signal
Y,M,C
Image compression
Image extension
Text signal
Y,M,C
UCR processing
Y,M,C,Bk
Image processor PCB
Figure 3-332
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
Image from external device
R,G,B
Y,M,C
Non-compression
image memory
(option)
Y,M,C,Bk