Canon iR3570 Service Manual page 651

Sub-item
DF-WLVL1/
2
LUT-ADJ2
<DENS>
Sub-item
WHITE-
ME
PD-DENS
PD-ME
<DPC>
D-GAMMA
<CST>
MF-A4R
MF-A6R
MF-A4
<FIXING>
Adjusting the ADF white level (Platen scan/Flow read scan)
<Operating procedure>
1) Place the user's usual paper on the document table and execute
COPIER>FUNCTION>CCD>DF-WLVL1: Read the white level in Book mode (to
check the transparency of the glass for Book mode).
2) Load the user's usual paper on DF and execute COPIER>FUNCTION>CCD>DF-
WLVL2: Read the white level in DF (flow read) mode (to check the transparency of
the glass for flow read).
(Reading both sides of the chart)
Front side read: Calculating DFTAR-R
Back side read: Calculating DFTAR2-R
Note: Both items shall be executed simultaneously.
Data 2 for CCD link correction
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) As shown in the figure, 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.
Sub-item
Controlling photoconductor drum resistance measurement (APVC)
Note: Execute this mode only in the following cases and skip it when unnecessary.
- Adjustment if the drum unit has been replaced
- Fault isolation if automatic copy density adjustment (PD-ME) has ended
abnormally
- Reference for checking the drum endurance
<Operating procedure>
1) Select an item and press the OK key.
2) Automatic control terminates after outputting one blank copy.
3) Select DISPLAY>HV-STS>PRIMARY to display the measurement results.
Sub-item
Registering the basic paper width of the manual feeder (DADF)
A4R width: 210 mm, A6R width: 105 mm, A4 width: 297 mm
For micro adjustment after basic width registration, select MF-A4R, MF-A6R, or
MF-A4 from COP. COPIER>ADJUST>CST-ADJ.
<Operating procedure>
1) Place an A4R size document on the manual feed and align the size guide with
the A4R width.
2) Select (MF-A4R) in this service mode to reverse its display. Press the OK key
to register the numeric value after automatic adjustment.
3) Also about the A6R and A4 sizes, register the basic width by following the
steps of 1) and 2).
COPIER > FUNCTION > CCD
Description
T-16-36
Description
T-16-37
COPIER > FUNCTION > DPC
Description
T-16-38
COPIER > FUNCTION > CST
Description
Chapter 16
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16-25