Canon iR3570 Service Manual page 645

<CCD>
MTF-MG
MTF-SG
DFTAR-R
DFTAR2-R
SH-TRGT
<LASER>
LA-OFF
LA-DELAY
POWER
<DEVELOP>
DE-OFST
<DENS>
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).
Sub-item
Entering a main-scan MTF correction value
<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.
Not used
Entering a shading target value (red) when DF is in use (Ordinary document read
position)
<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.
Entering a shading target value (red) when DF is in use (Secondary document read
position)
<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.
Entry of a white level target value at the time of shading correction
<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.
Sub-item
Adjusting the rear-end laser OFF position
<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.
Entering a delay value after laser unit displacement (Matching the laser main scan)
<Setting range> 360 to 440
Enter the delay value peculiar to the unit affixed to the unit at laser unit
replacement.
Adjusting the laser power
<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
Entering an offset value for the developing bias DC
<Setting range> -128 to 127 (Default: 0)
Setting a greater value increases the density.
Read start position
Original
F-16-16
T-16-18
COPIER > ADJUST > CCD
Desciption
T-16-19
COPIER > ADJUST > LASER
Description
T-16-20
Description
Chapter 16
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16-19