Canon imageRUNNER ADVANCE C255 Series Service Manual page 649

COPIER (Service mode for copier) > ADJUST (Adjustment mode) > V-CONT
VBACK-Y 2
Detail
Use Case
Adj/Set/Operate Method
Caution
Display/Adj/Set Range
Unit
Default Value
Related Service Mode
Additional Functions
Mode
Supplement/Memo
Amount of Change per
Unit
VBACK-M 2
Detail
Use Case
Adj/Set/Operate Method
Caution
Display/Adj/Set Range
Unit
Default Value
Related Service Mode
Additional Functions
Mode
Supplement/Memo
Amount of Change per
Unit
Adj Y-clr fog remov potntl:pln/rcycl 1,2
To adjust the offset of the fogging removal potential Vback for Y-color when printing plain paper
1, 2/recycled paper 1, 2 (which paper width is A4 or larger).
As the value is incremented by 1, the fogging removal potential changes by 10 V.
+: Fogging is alleviated.
-: Coarse image, blanking of image edge, and carrier adherence are alleviated.
In a low humidity environment (e.g. winter in North America or Japan), the output may not be
changed by increasing the value.
At the occurrence of Y fogging
1) Enter the setting value (switch negative/positive by -/+ key) and press OK key.
2) Execute Auto Adjust Gradation> Full Adjust.
Do not use this when the machine is operating correctly.
-5 to 5
V
0
COPIER> ADJUST> V-CONT> VBACK-M/C/K, VBACK2-Y
Adjustment/Maintenance> Adjust Image Quality> Auto Adjust Gradation> Full Adjust
For iR-ADV C250 series, adjustment results by VBACK-Y and VBACK2-Y are linked with each
other so that their values are the same.
5
Adj M-clr fog remov potntl:pln/rcycl 1,2
To adjust the offset of the fogging removal potential Vback for M-color when printing plain paper
1, 2/recycled paper 1, 2 (which paper width is A4 or larger).
As the value is incremented by 1, the fogging removal potential changes by 10 V.
+: Fogging is alleviated.
-: Coarse image, blanking of image edge, and carrier adherence are alleviated.
In a low humidity environment (e.g. winter in North America or Japan), the output may not be
changed by increasing the value.
At the occurrence of M fogging
1) Enter the setting value (switch negative/positive by -/+ key) and press OK key.
2) Execute Auto Adjust Gradation> Full Adjust.
Do not use this when the machine is operating correctly.
-5 to 5
V
0
COPIER> ADJUST> V-CONT> VBACK-Y/C/K, VBACK2-M
Adjustment/Maintenance> Adjust Image Quality> Auto Adjust Gradation> Full Adjust
For iR-ADV C250 series, adjustment results by VBACK-M and VBACK2-M are linked with each
other so that their values are the same.
5
638
8. Service Mode