Canon imageRUNNER ADVANCE C3330 Series Service Manual page 896

COPIER (Service mode for copier) > OPTION (Specification setting mode) > IMG-DEV
ADJ-VPP 2
Detail
Use Case
Adj/Set/Operate Method
Caution
Display/Adj/Set Range
Default Value
ADJ-BLNK 2
Detail
Use Case
Adj/Set/Operate Method
Caution
Display/Adj/Set Range
Default Value
Related Service Mode
DMX-OF-Y 2
Detail
Use Case
Adj/Set/Operate Method
Display/Adj/Set Range
Default Value
DMX-OF-M 2
Detail
Use Case
Adj/Set/Operate Method
Display/Adj/Set Range
Default Value
Adj of dev AC bias Vpp: 1/1 SPD
To adjust Vpp of the developing AC bias at 1/1 speed.
When the value is decreased, ring marks or uneven density at intervals of cylinder circumference
on a halftone image is alleviated.
When the value is increased, white spots or uneven density at intervals of cylinder circumference
on a solid image is alleviated.
When image failures (ring marks, white spots, uneven density at intervals of cylinder
circumference) occur
1) Enter the setting value (switch negative/positive by -/+ key) and press OK key.
2) Execute auto gradation adjustment (full adjustment).
When decreasing the value too much, density may be lowered.
-4 to 0
0: +/-0 V, -1: -100 V, -2: -200 V, -3: -300 V, -4: -400 V
0
Setting of thin line density improvement
To adjust the waveform of developing AC bias to improve thin line density.
When thin line density is low, set 1 or 2.
As the value is increased, the line gets darker, but white gap/white spots may occur.
- When thin line density is low
- When it appears that thin line width is narrow
1) Enter the setting value, and then press OK key.
2) Execute auto gradation adjustment (full adjustment).
- Use this item when density is not improved by making adjustment with ADJ-VPP/VPPN.
- If the value is too large, white gap/white spots may occur.
0 to 2
0: Normal, 1: Thin line improvement mode 1, 2: Thin line improvement mode 2
0
COPIER> OPTION> IMG-DEV> ADJ-VPP, ADJ-VPPN
Adj of Y-color D-max target density
To adjust the target density of D-max control in the case where density of solid area on Y-color
image is not appropriate even when auto gradation adjustment is executed.
Increase the value when the density is low and decrease the value when the density is high.
When density of solid area is not appropriate even though auto gradation adjustment is executed
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 gradation adjustment (full adjustment).
-3 to 3
0
Adj of M-color D-max target density
To adjust the target density of D-max control in the case where density of solid area on M-color
image is not appropriate even when auto gradation adjustment is executed.
Increase the value when the density is low and decrease the value when the density is high.
When density of solid area is not appropriate even though auto gradation adjustment is executed
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 gradation adjustment (full adjustment).
-3 to 3
0
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8. Service Mode