Salt-Dmax Control (Development Characteristics Correction) - Canon iR C3200 Series Service Manual

- Service Person Interaction
The mechanism is executed when 'full correction'is executed while auto gradation correction is under way in user
mode.
MEMO;
Differences Among 3 Test Patterns
- Test Print 1
It shows 64 gradations expressed by means of error diffusion processing, which is not subject to moire and,
therefore, used in text/photo/map, print photo, and text mode.
- Test Print 2
It shows 64 gradations expressed by means of screening with a low number of lines, which is suitable for the
expression of gradation and, therefore, is used for print film photo mode and when priority is placed on PDL.
- Test Print 3
It shows 64 gradations expressed by means of screening with a high number of lines, which is suitable for the
achievement of a high resolution and is, therefore, used when priority is placed on PDL resolution.

9.4.7 SALT-Dmax Control (development characteristics correction)

This mechanism is used to stabilize the maximum resolution on the intermediate transfer belt (ITB).
It is used to make up for changes in the maximum density (Dmax), changes in response to deterioration in developer
or the drum, changes in temperature/humidity, or changes occurring as the machine is used over time.
Description of Control
Start-up
V
Measures the light reflected by the surface of the ITB (background measurement).
V
Forms a sample patch of the maximum solid density stored in the DC controller.
Test Print
F-9-16
Chapter 9
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