Ricoh SP 8400DN Field Service Manual page 1439

Process Control
Image Density Control (Process Control)
Outline
Process control is a system that adjusts the image creation process to maintain a constant image density. Process
control is executed at the following conditions.
Trigger
1 •
Power ON
•
Recovering
from Energy
Saver
•
Closing the
front cover
2 Job End
3 Job Interruption
4 Non-use (Idle)
5 Manual process
control
The process control consists of the following features.
•
Potential Control (Charge/Development Bias and LD power Control)
•
Vtref Compensation
Flowchart: From Process Control to Printing
Operative Condition
•
When a certain time passes after the previous job end,
and when a certain number of sheets are printed after the
last process control at the previous Power ON,
recovering from Energy Saver mode or closing the front
cover.
•
When a new PCDU is detected.
•
When the TD sensor detects a toner end before turning
the power on.
When the job end counter becomes more than the threshold.
When the job interrupt counter becomes more than the
threshold.
•
When the non-use time counter becomes more than the
threshold.
•
When significant environmental changes occur after the
last job end.
When SP 3-011-001 is executed.
7.Detailed Descriptions
Notes
No retry if an SC
occurs during
adjusting.
•
Process
Control clears
the Job end
counter.
Process control
clears the job
interrupt counter.
Available only
when the energy
saver mode is off.
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