31 March, 1999
PROCESS CONTROL
2-3
Detailed
Descriptions
2.1.3 PROCESS CONTROL STEPS
Process control is done on seven separate occasions (see the 'Occasion' column
in the table below).
Process control consists of several steps. The steps that are done depend on
which of the seven occasions has arisen. The steps that are done for each
occasion are given in the 'Steps done' column of the following table.
c
ID sensor calibration
d
K development bias initialization
e
Color development bias initialization
f
Charge grid bias voltage adjustment
g
Y, C, M, and K bias fine adjustment
h
Process control interval counter reset
Situation
Condition
Steps done
Forced process
control
When forced process control is done (engine
SP mode 7. Process Ctrl - Initialize)
c
through
h
Process control
regular interval
When more than 100 sheets in 4C mode (or
an equivalent number of sheets in another
mode) have been printed upon completion of
a job. (The interval can be changed with
engine SP 7 Process Control – Interval Set)
c
,
f
,
g
,
h
Power on
When the fusing temperature is 80
°
C or lower
just after the power is turned on.
c
,
•
,
f
through
h
Environmental
change
When the change in the temperature/humidity
sensor output since the previous process
control exceeds a certain value
c
,
•
,
f
through
h
K-DTM
(Development
Toner Magazine)
replacement
This is done after clearing the K-DTM near-
end state (i.e., when a new K-DTM is added).
The machine idles and when the development
roller stops for 10 seconds, indicating that
idling is over, process control occurs.
c
,
•
,
f
Color DTM
replacement
After the color toner end or near-end state is
reset, the machine idles to transfer color toner
to the development unit. After idling, process
control occurs.
c
through
h
PCU replacement
After a new PCU is detected, it is lubricated
(new PCU lubricant application mode). Then
process control occurs.
c
through
h
