Image Stabilization Control - Canon imageRUNNER ADVANCE 715iF III Series Service Manual

Photosensitive Drum
Service Mode
• Invalidate setting of the static elimination control: Use in a high humidity environment/Thin Paper/hygroscopic paper when
excessive Static Elimination bias causes white spots, etc.
COPIER > OPTION > FEED-SW > SP-SW

Image Stabilization Control

■ Overview
Image failure due to change of the environment or deterioration of the Photosensitive Drum is prevented to ensure stabilized
print.
■ PASCAL control
To stabilize the gradation density characteristics of the image.
This control is executed at auto adjust gradation. Gradation density of the patch pattern on the test print is scanned by the Reader
to create an image density correction table.
Based on the table, image gradation density characteristics that vary due to environmental change or deterioration of the
Photosensitive Drum are corrected.
Control timing
Execution of auto adjust gradation ([Settings/Registration]) > [Auto Adjust Gradation]
Control description
1. When the specified conditions are satisfied, the Main Controller PCB prints memorized patch patterns.
2. Set the test print on the reader.
3. The reader scans the gradation density of the patch patterns from the test prints.
4. The Main Controller creates an image density correction table from the data of gradation density of the patch pattern scanned
by the Reader.
Related service mode
• Default display setting of auto adjust gradation
COPIER > OPTION > USER > DFLT-ADJ
• Setting of gradation adjustment data:
COPIER > OPTION > IMG-MCON > PASCAL
• Setting of the paper type to be used for auto adjust gradation:
COPIER > OPTION > IMG-MCON > PASCL-TY
Cartridge
Static Eliminator
Transfer Roller
Developing High Voltage PCB
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2. Technology