Canon 1000 Service Manual page 119

To prevent such displacement, the CLC1000 corrects image positions in relation to the above factors:
1 Transfers the image position correction pattern (output from the RAM area of the video controller)
directly to the transfer belt (for Y, M, C, and Bk).
2 Reads the pattern of each color by the CCD for reading patterns.
3 Using the M pattern for reference, analyzes each pattern to determine the degree of discrepancy
using the CPU on the DC controller.
4 Prepares correction data based on the results of analysis, and imposes feedback on each factor.
LED
Video signal
CCD
COPYRIGHT © 2001 CANON INC.
CCD control PCB for correction
Amplification
Clock generation
for CCD
Video controller
Laser unit
Reproduction ratio
correction motor
M2/M5/M7
Figure 3-421
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
LEDON
8
A/D conversion
Slant correction motor
M3/M6/M8
3. OPERATION AND TIMING
DC controller PCB
LED control
Histogram generation
Center coordinates
computation
Correction data
generation
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