Canon iR4570 Series Service Manual page 892

Chapter 16
<DENS>
Sub-
item
WHITE-
ME
PD-
DENS
PD-ME
<DPC>
16-48
COPIER > FUNCTION > DENS
Automatically correcting the white level
<Operating procedure>
1) Place about 10 or more sheets of standard white paper (the user's usual
paper) on the document table.
2) Select <WHITE-ME> to reverse the display. Then press the OK key.
3) The document lighting lamp scans once and the operation terminates.
Outputting a print pattern for automatic density adjustment in Character
mode
Note: Since binarizing is supported by the PD method in Character mode,
execute this mode to adjust the density automatically.
<Operating procedure>
1) Select <PD-DENS> to reverse its display. Then press the OK key.
2) Paper is fed from Cassette 2 and a 17-tone print pattern is output. This
print pattern is used in <PD-ME>.
Automatically adjusting the density in Character mode (Reading PD-
DENS output pattern)
<Operating procedure>
1) Set the PD-DENS output pattern on the document table by noting the
following:
- Face the print side down.
- Orient the white (light) side of the 17-tone chart toward the vertical size
plate.
- Align the output pattern with the index inside left of the document table.
2) Select <PD-ME> to reverse its display. Then press the OK key.
3) The document lighting lamp is turned ON and OFF for 13 automatic
scans.
T-16-33
Description Level
1
1
1