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WRITE CF5001 Ver.1.0 Sep. 2003
2-18
II UNIT EXPLANATION
The passage time differences between black (K) and each color are determined from the passage times
detected at above. The time difference is called the color drift amount due to the image write timing. It also
determines the difference between the edge detection timing difference for black (K) and the edge detec-
tion timing differences for each color. It is called the color drift amount due to the angle of the write unit.
The determined value is compared with the set point and then it is corrected to meet the set point.
D. Operation condition of the color registration correction control
The color registration correction control is performed when:
• Operation condition 1
The color registration automatic correction control is executed in the 36 mode.
Perform the operation when replacing a component described in "3. LIST OF ADJUSTMENT ITEMS "
in Field Service.
• Operation condition 2
The machine is in a warm-up cycle, except when the fusing temperature is 70 °C or more at the start
of the warm-up cycle.
• Operation condition 3
The specified number of page is copied/printed.
• Operation condition 4
The copy/print operation has not been performed for a certain time.
• Operation condition 5
A certain change in temperature is detected from the temp detection board (TDB).
Note:
• In operation condition 3, the correction control is performed by temporarily interrupting the cur-
rent job. Setting using the DIP SW of the 25 mode can nonetheless be made to let the machine
perform the correction control after completing the current job.
• For operation condition 4 and 5, the first copy/print cycle is started after the corresponding
operation condition has been met.