Canon imageRUNNER ADVANCE C3330 Series, Service Manual

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COPIER (Service mode for copier) > OPTION (Specification setting mode) > IMG-DEV
ADJ-VPP 2 Adj of dev AC bias Vpp: 1/1 SPD
Detail 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.
Use Case When image failures (ring marks, white spots, uneven density at intervals of cylinder
circumference) occur
Adj/Set/Operate Method 1) Enter the setting value (switch negative/positive by -/+ key) and press OK key.
2) Execute auto gradation adjustment (full adjustment).
Caution When decreasing the value too much, density may be lowered.
Display/Adj/Set Range -4 to 0
0: +/-0 V, -1: -100 V, -2: -200 V, -3: -300 V, -4: -400 V
Default Value 0
ADJ-BLNK 2 Setting of thin line density improvement
Detail 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.
Use Case
- When thin line density is low
- When it appears that thin line width is narrow
Adj/Set/Operate Method
1) Enter the setting value, and then press OK key.
2) Execute auto gradation adjustment (full adjustment).
Caution
- 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.
Display/Adj/Set Range
0 to 2
0: Normal, 1: Thin line improvement mode 1, 2: Thin line improvement mode 2
Default Value 0
Related Service Mode COPIER> OPTION> IMG-DEV> ADJ-VPP, ADJ-VPPN
DMX-OF-Y 2 Adj of Y-color D-max target density
Detail 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.
Use Case When density of solid area is not appropriate even though auto gradation adjustment is executed
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 gradation adjustment (full adjustment).
Display/Adj/Set Range -3 to 3
Default Value 0
DMX-OF-M 2 Adj of M-color D-max target density
Detail 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.
Use Case
When density of solid area is not appropriate even though auto gradation adjustment is executed
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 gradation adjustment (full adjustment).
Display/Adj/Set Range
-3 to 3
Default Value
0
8. Service Mode
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