Canon imageRUNNER ADVANCE C3500 III Series, Service Manual, Page: 819 / 1252

COPIER (Service mode for printer) > OPTION (Specification setting mode) > IMG-DEV
DELV-THM 2 Set image ratio for M-color toner eject
Detail To set the threshold value of average image ratio of M-color, that is the condition to perform the
low duty toner ejection sequence.
As the value is increased, coarseness is alleviated, but productivity is decreased and toner
consumption is increased.
As the value is decreased, productivity and toner consumption are improved, but coarseness gets
worse.
Use Case While printing low duty images (images with low image ratio),
- When graininess (coarseness) or low density occurs
- When low productivity or high toner consumption is pointed out by the user
Adj/Set/Operate Method Enter the setting value (switch negative/positive by -/+ key) and press OK key.
Display/Adj/Set Range -2 to 4
-2: -1.0%, -1: -0.5%, 0: 0.0%, 1: 0.5%, 2: 1.0%, 3: 1.5%, 4: 2.0%
Unit %
Default Value 0
DELV-THK 2 Set image ratio for Bk-color toner eject
Detail To set the threshold value of average image ratio of Bk-color, that is the condition to perform the
low duty toner ejection sequence.
As the value is increased, coarseness is alleviated, but productivity is decreased and toner
consumption is increased.
As the value is decreased, productivity and toner consumption are improved, but coarseness gets
worse.
Use Case
While printing low duty images (images with low image ratio),
- When graininess (coarseness) or low density occurs
- When low productivity or high toner consumption is pointed out by the user
Adj/Set/Operate Method
Enter the setting value (switch negative/positive by -/+ key) and press OK key.
Display/Adj/Set Range
-2 to 4
-2: -1.0%, -1: -0.5%, 0: 0.0%, 1: 0.5%, 2: 1.0%, 3: 1.5%, 4: 2.0%
Unit
%
Default Value 0
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 If the value is too small, 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
8. Service Mode
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