Canon iR4570 Series, Service Manual

Page: 796 / 876

Chapter 16
16-36
F-16-16
<CCD>
T-16-18
<LASER>
COPIER > ADJUST > CCD
Sub-item Description 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.
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.
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).