Canon imageRUNNER ADVANCE C350 series Service Manual page 916

COPIER> OPTION> IMG-DEV
ADJ-VPP3 Adj of developing AC bias Vpp: other ppr
Lv.2 Details To adjust Vpp of the developing AC bias at the time of printing with
other types of papers.
As the value is incremented by 1, Vpp changes by 0.5 kV.
Decrease the value when fogging/bias leak/high density occurs.
Use case When an image failure (carrier adherence, ring marks, etc.) occurs
Adj/set/operate method 1) Enter the setting value, and then press OK key.
2) Execute Auto Adjust Gradation (Full Adjust).
Caution If the value is too small, the contrast becomes weak.
Display/adj/set range 0 to 5
0: +/-0 V, 1: -100 V, 2: -200 V, 3: -300 V, 4: -400 V, 5: -500 V
Unit 100 V
Appropriate target value 0
Default value 0
Related service mode COPIER> OPTION> IMG-DEV> ADJ-VPPN, ADJ-VPPN
8
Service Mode > COPIER > OPTION > IMG-RDR
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8 Service Mode > COPIER > OPTION > IMG-RDR
■ IMG-RDR
COPIER> OPTION> IMG-RDR
DFDST-L1 DADF mode dust dtct level adj: ppr intvl
Lv.1 Details To adjust dust detection level with dust detection correction control
that is executed at paper interval in DADF mode.
Reduce the value in the case of frequent display of cleaning
instruction at the time of dust detection. As the value is smaller, the
dust is less detected.
Increase the value when black/white lines appear. As the value is
larger, the small dust is more likely detected.
Use case - When black/white line occurs due to dust
- Upon user's request
Adj/set/operate method 1) Enter the setting value, and then press OK key.
2) Turn OFF/ON the main power switch.
Caution When increasing the value too much, the cleaning instruction screen
may appear too often since even small dust that will not be appeared
on the image can be detected.
When decreasing the value too much, lines may appear on the
image.
Display/adj/set range 0 to 255
0 to 84: Weakest, 85 to 169: Weak, 170 to 254: Moderate, 255:
Strong
Default value 200
Supplement/memo Lines may appear on the image if there is dust. With dust detection
correction control, the image is corrected to prevent lines once dust
is detected.
To turn OFF the control, make the following selection: Settings/
Registration> Function Settings> Common> Scan Settings> Removal
of Soiled Lines, and set the item to "OFF".
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