Canon imageRUNNER C1335 Series Service Manual page 484

■ V-CONT
COPIER> ADJUST> V-CONT
VCONT-Y Adj of Y-color contrast potential
Details To adjust the contrast potential for Y.
As the value is incremented by 1, the contrast potential changes by 10V.
+: Image becomes darker.
-: Image becomes lighter.
When the value is too large, paper winds around the Fixing Roller or a
transfer failure occurs.
In a low humidity environment (e.g. winter in North America or Japan),
the output may not be changed by increasing the value.
In principle, the adjustment of the density should be performed in
Adjustment/Maintenance> Adjust Image Quality> Density Adjustment
Mode.
Use case When adjusting the density of D-max control in the case that an image
density failure occurs
Adj/set/operate method 1) Enter the setting value (switch negative/positive by -/+ key) and press
Start key.
2) 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> VCONT-M/C/K
Related UI menu Adjustment/Maintenance> Adjust Image Quality> Auto Adjust Gradation>
Full Adjust
Adjustment/Maintenance> Adjust Image Quality> Density Adjustment
Mode
8
Service Mode > COPIER > ADJUST > V-CONT
8 Service Mode > COPIER > ADJUST > V-CONT
COPIER> ADJUST> V-CONT
VCONT-M Adj of M-color contrast potential
Details To adjust the contrast potential for M.
As the value is incremented by 1, the contrast potential changes by 10V.
+: Image becomes darker.
-: Image becomes lighter.
When the value is too large, paper winds around the Fixing Roller or a
transfer failure occurs.
In a low humidity environment (e.g. winter in North America or Japan),
the output may not be changed by increasing the value.
In principle, the adjustment of the density should be performed in
Adjustment/Maintenance> Adjust Image Quality> Density Adjustment
Mode.
Use case When adjusting the density of D-max control in the case that an image
density failure occurs
Adj/set/operate method 1) Enter the setting value (switch negative/positive by -/+ key) and press
Start key.
2) 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> VCONT-Y/C/K
Related UI menu Adjustment/Maintenance> Adjust Image Quality> Auto Adjust Gradation>
Full Adjust
Adjustment/Maintenance> Adjust Image Quality> Density Adjustment
Mode
8-45
8-45