Canon imageRUNNER ADVANCE 9070 PRO series Service Manual Digest page 436

COPIER> ADJUST> V-CONT
VBACK-Y Adj Y color fogging removal potential
Lv.2 Details To adjust the offset of the fogging removal potential Vback for Y.
As the value is incremented by 1, the fogging removal potential
changes by 10 V.
Use case At the occurrence of Y fogging
Adj/set/operate method 1) Enter the setting value (switch negative/positive by -/+ key) and
press OK key.
2) Turn OFF/ON the main power switch.
3) Execute Auto Adjust Gradation > Full Adjust.
Caution Do not use this when the machine is operating correctly.
Display/adj/set range -5 to 5
Unit 10 V
Default value 0
Related service mode COPIER> ADJUST> V-CONT> VBACK-M, VBACK-C, VBACK-K
Related user mode Adjustment/Maintenance> Adjust Image Quality> Auto Adjust
Gradation > Full Adjust
Adjustment/Maintenance> Adjust Image Quality> Correct Color Cast
VBACK-M Adj M color fogging removal potential
Lv.2 Details To adjust the offset of the fogging removal potential Vback for M.
As the value is incremented by 1, the fogging removal potential
changes by 10 V.
5
Use case At the occurrence of M fogging
Adj/set/operate method 1) Enter the setting value (switch negative/positive by -/+ key) and
press OK key.
2) Turn OFF/ON the main power switch.
3) Execute Auto Adjust Gradation > Full Adjust.
Caution Do not use this when the machine is operating correctly.
Display/adj/set range -5 to 5
Unit 10 V
Default value 0
Related service mode COPIER> ADJUST> V-CONT> VBACK-Y, VBACK-C, VBACK-K
Related user mode Adjustment/Maintenance> Adjust Image Quality> Auto Adjust
Gradation > Full Adjust
Adjustment/Maintenance> Adjust Image Quality> Correct Color Cast
5-208
+: Reduction of fogging, increase of carrier adhesion, and
increase of white spots at the edge.
-: Increase of fogging, reduction of carrier adhesion, and
reduction of white spots at the edge.
+: Reduction of fogging, increase of carrier adhesion, and
increase of white spots at the edge.
-: Increase of fogging, reduction of carrier adhesion, and
reduction of white spots at the edge.
COPIER> ADJUST> V-CONT
VBACK-C Adj C color fogging removal potential
Lv.2 Details To adjust the offset of the fogging removal potential Vback for C.
As the value is incremented by 1, the fogging removal potential
changes by 10 V.
+: Reduction of fogging, increase of carrier adhesion, and
increase of white spots at the edge.
-: Increase of fogging, reduction of carrier adhesion, and
reduction of white spots at the edge.
Use case At the occurrence of C fogging
Adj/set/operate method 1) Enter the setting value (switch negative/positive by -/+ key) and
press OK key.
2) Turn OFF/ON the main power switch.
3) Execute Auto Adjust Gradation > Full Adjust.
Caution Do not use this when the machine is operating correctly.
Display/adj/set range -5 to 5
Unit 10 V
Default value 0
Related service mode COPIER> ADJUST> V-CONT> VBACK-Y, VBACK-M, VBACK-K
Related user mode Adjustment/Maintenance> Adjust Image Quality> Auto Adjust
Gradation > Full Adjust
Adjustment/Maintenance> Adjust Image Quality> Correct Color Cast
VBACK-K Adj Bk color fogging removal potential
Lv.2 Details To adjust the offset of the fogging removal potential Vback for Bk.
As the value is incremented by 1, the fogging removal potential
changes by 10 V.
+: Reduction of fogging, increase of carrier adhesion, and
increase of white spots at the edge..
-: Increase of fogging, reduction of carrier adhesion, and
reduction of white spots at the edge.
Use case At the occurrence of Bk fogging
Adj/set/operate method 1) Enter the setting value (switch negative/positive by -/+ key) and
press OK key.
2) Turn OFF/ON the main power switch.
3) Execute Auto Adjust Gradation > Full Adjust.
Caution Do not use this when the machine is operating correctly.
Display/adj/set range -5 to 5
Unit 10 V
Default value 0
Related service mode COPIER> ADJUST> V-CONT> VBACK-Y, VBACK-M, VBACK-C
COPIER> DISPLAY> DPOT> VBACK-K
Related user mode Adjustment/Maintenance> Adjust Image Quality> Auto Adjust
Gradation > Full Adjust
Adjustment/Maintenance> Adjust Image Quality> Correct Color Cast
EPOTOFST Manual entry of Potential Sensor offset