Canon imageRUNNER ADVANCE 525 I, Service Manual

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■ 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
2. Technology
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