Process Control
SM 6-41 D014/D015/D078/D079
Detailed
Descriptions
6.8.5 POTENTIAL CONTROL
When is Potential Control Done?
1. Initial Process Control Self-Check
The process control self-check is always done automatically after the machine is turned on.
If one or more of the following conditions existed before the machine is switched off, this
will also trigger the process control self-check:
The machine remained idle longer than the time specified with SP3554-1.
The temperature change since the previous time that the machine power was cycled
off/on was greater than the setting specified with SP3554-2.
The change in the relative humidity since the previous time that the machine power
was cycled off/on was greater than the value specified for SP3554-3.
The change in the absolute humidity since the previous time that the machine power
was cycled off/on was greater than the value specified for SP3554-4.
Note: The initial process control self-check is not done when the machine is turned on with
the front door open.
2. During a Job.
SP3552 determines when a process control self-check is done while the machine is
printing, receiving data for the next job, or while jobs are queued for printing. This occurs
when:
The current page count for black-and white (SP3552-3) > SP3552-1
The current page count for color (SP3552-4) > SP3552-2
If SP3552-1, -2 are set to "0", the self-check is done at the following intervals, which
depend on the development gamma from the most recent process control self-check.
If the development gamma reading is much larger than the target value of
development gamma, the process control self-check is done every 250 pages.
If the development gamma reading is only slightly different from the target value of
development gamma, the process control self-check is done every 500 pages.