Table of Contents
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[Control description]
• At job completion (dust detection)
The Reading Sensor detects presence/absence of dust at the reading position A, B, and C in that order, and the position
where dust is least present becomes the reading position for the next job.
• At the start of a job (dust evasion)
Like the time of completion of a job, presence/absence of dust is detected at all positions (A, B, and C in that order). The
position where dust is least present is used as the reading position and reading starts.
• At paper interval
The Scanner Unit does not move.
Reading is performed at the position determined by the control performed at job completion or at the start of a job, and image
correction is performed if dust is detected at that position.
Service mode
• COPIER > OPTION > IMG-RDR > DFDST-L1
Adjustment of dust detection level at paper interval
• COPIER > OPTION > IMG-RDR > DFDST-L2
Adjustment of dust detection level at job completion
Image Processing
The functions of the PCB related to image processing are shown below:
• Reader Controller PCB
Shading correction (executed per job)
Color displacement correction in vertical scanning direction
0.5 mm
C B A
Scanning Glass
C
B
A
0.5 mm
45
2. Technology
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Table of Contents
Troubleshooting
