Canon iR3570 Series, Service Manual

Page: 645 / 722

Chapter 16
16-19
F-16-16
<CCD>
T-16-18
<LASER>
T-16-19
<DEVELOP>
T-16-20
<DENS>
COPIER > ADJUST > CCD
Sub-item Desciption Level
MTF-MG Entering a main-scan MTF correction value
1
<Setting range> 0 to 99 (Default: 0)
- If the CIS unit has been replaced, enter the value from the label affixed to the CIS
unit.
- If RAM on the reader controller circuit board has been cleared or the board itself has
been replaced, enter the value from the service label.
- If the setting of this item has been changed, enter the new value into the service label.
MTF-SG Not used 1
DFTAR-R Entering a shading target value (red) when DF is in use (Ordinary document read
position)
1
<Setting range> 1 to 2047 (Default: 1106)
If an image error (attributable to a dirty chart or other) has occurred after the execution
of COPIER>FUNCTION>DF-WLVL1/DF-WLVL2, enter factory measurement data
in this mode.
DFTAR2-R Entering a shading target value (red) when DF is in use (Secondary document read
position)
1
<Setting range> 1 to 2047 (Default: 1138)
If an image error (attributable to a dirty chart or other) has occurred after the execution
of COPIER>FUNCTION>DF-WLVL2, enter factory measurement data in this mode.
SH-TRGT Entry of a white level target value at the time of shading correction
1
<Setting range> 1 to 2046 Default: 1070
As a remedy in the field, a shade on an image occurring when a folded/creased
document is read is lessened.
COPIER > ADJUST > LASER
Sub-item Description Level
LA-OFF Adjusting the rear-end laser OFF position
1
<Setting range> -128 to 127 (Default: 0)
If RAM on the DC controller circuit board has been cleared or the board itself has
been replaced, enter the value from the service label.
LA-DELAY Entering a delay value after laser unit displacement (Matching the laser main scan)
1
<Setting range> 360 to 440
Enter the delay value peculiar to the unit affixed to the unit at laser unit
replacement.
POWER Adjusting the laser power
1
<Setting range> -128 to 127 (Default: 0)
If RAM on the DC controller circuit board has been cleared or the board itself has
been replaced, enter the value from the service label.
COPIER > ADJUST > DEVELOP
Sub-item Description Level
DE-OFST Entering an offset value for the developing bias DC
1
<Setting range> -128 to 127 (Default: 0)
Setting a greater value increases the density.
Original
Read start position
Decrease the setting
(so that the read start
position moves toward the rear).
Increase the setting
(so that the read
start position moves
toward the front).