Product Support Guide
D143/D144
Ver.1.0
Page 67 of 72
2/3/2012
Subject to change without notice
Auto Color Selection (ACS)
The following is the same as the ACS mechanism on the previous model.
In B&W mode, B&W pages printed after a color page is counted as black and white. In ACS mode, these pages are
counted as color mixed pages.
By default, once the ITB (image transfer belt) unit has moved into contact with all the color drums to print a color page, it
remains in this position throughout the end of the job, even if there are B&W pages following the color page. For
example, when sending 10 copies of 5 originals as one job and only the second page contains color data, the ITB unit
moves into contact with all the color drums just before printing the second page. It then remains in contact with the drums
until all 50 pages have been printed out.
In this example, the counters would then increment as shown in the table below.
SP Number Counter
Counter
Value
SP8-581-
004
D: Color
6
SP8-581-
005
D: B&W
5
SP8-581-
006
C: Color
2
SP8-581-
007
C: B&W
3
D: Developments (Color = CMY drums, B&W = Bk drum)
C: Copies
The counters count up in the manner explained above, in order to accurately reflect the number of color and B&W
outputs made. This means that when printing B&W pages after a color page has been printed, the color counters do not
count up (even when the color drums and development units rotate). So the usage of the various drums is not reflected
accurately.
On this model, there is an SP mode (Sp2-907-001: ACS Setting) which makes it possible to move the ITB back to the
default position, separated from the four drums, in the middle of a job. The default is 0, which produces the same result
as with previous products which use ACS, i.e. once the ITB contacts the four drums to print a color page, it does not
separate from the drums until job end. All other values of this SP set the number of Bk sheets that need to pass the ITB
consecutively for the ITB to return to default position. For example, with a setting of 3, the ITB will separate from the
drums after three consecutive Bk sheets are printed (at that time, in the middle of the job). Changing the position of the
ITB takes a few seconds and increases the wear on the drums.
B&W
1st
Color
5th
Color
2nd
B&W
3rd
B&W
4th
