Canon iR3570 Service Manual page 646

Chapter 16
DENS-ADJ
<BLANK>
BLANK-T
BLANK-B
<HV-PRI>
Sub-item
OFST1-DC
OFST1-AC
<HV-TR>
Sub-item
TR-OFST
TR-SPP
TR-TP-TM
iR4570/4530/3570/3530 Reference value for the application width
16-20
Sub-item
Correcting the image (copy/print) density
The F-value table is corrected if an image becomes fogged or blurred.
<Setting range> 1 to 9 (Default: 5)
Setting a greater value reduces fogging.
Setting a smaller value reduces blurring.
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.
Sub-item
Entering an adjustment value for the chipping width at the front of an image
<Setting range> -128 to 127 (Default: 0)
Setting a greater value increases the chipping width.
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 an adjustment value for the chipping width at the rear of an image
<Setting range> -128 to 127 (Default: 0)
Setting a greater value increases the chipping width.
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 an adjustment value for primary charge DC offset 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.
Note: If the compound power circuit board has been replaced, enter the value from the
label affixed to the casing of the new compound power circuit board.
Entering an adjustment value for primary charge AC offset 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.
Note: If the compound power circuit board has been replaced, enter the value from the
label affixed to the casing of the new compound power circuit board.
Entering an output adjustment value for transfer charge current offset
<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 an output adjustment value for thick-paper transfer bias (for simplex printing on thick paper and duplex
printing on the 1/2 side)
- Increasing the value is very effective.
<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.
Adjusting the length of application time of transfer lead edge weak bias
<Adjustment method>
Enter the service label value when clearing RAM of the DC controller PCB or replacing the PCB.
This mode determines the length of time in which weak bias is applied to transfer lead edge.
The transfer lead edge weak bias becomes effective with the following settings.
1) Output condition: Execute 'COPIER>OPTION>COMBO> (1) PPR-SLCT (paper type) / (2) MOD-SLCT (paper
pick-up mode) / (3) ENV-SLCT (environment selection)' and register them under TR-SW 1 to 5.
2) Execute 'COPIER>ADJUST>HV-TR> (1) TR-TP-TM (length of application time) / (2) TR-TP-LV (application
level).'
<Setting range> 0 to 127 (Default: 0) (Unit: 2msec)
Refer to the following table for setting values.
Example) iR4570: Enter '50'. -> Application width: approx. 5 to 7mm,
IR2270: Enter '80'. -> Application width: approx. 5.5 to 6mm
* Recommended value to be set when a separation jam occurs at the second side of double-sided copy
iR4570, iR3570 series: 50
iR2270, iR2870 series: 80
TR-TP-TM
45
50
T-16-21
COPIER > ADJUST > DENS
Description
T-16-22
COPIER > ADJUST > BLANK
Description
T-16-23
COPIER > ADJUST > HV-PRI
Description
T-16-24
COPIER > ADJUST > HV-TR
Description
T-16-25
Application width from the lead edge of paper
approx. 3 to 4mm
approx. 5 to 7mm
Level
1
Level
1
1
Level
1
1
Level
1
1
1