Canon Vizcam 1000, Service Manual

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COPYRIGHT © 2001 CANON INC. CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
3-75
3. OPERATION AND TIMING
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.
Figure 3-421
Reproduction ratio
correction motor
Slant correction motor
M2/M5/M7
M3/M6/M8
Video signal
Amplification
CCD control PCB for correction
DC controller PCB
Clock generation
for CCD
CCD
LED
8
A/D conversion
LEDON
Histogram generation
Center coordinates
computation
LED control
Laser unit
Video controller
Correction data
generation