Process Control Timing And Triggers - Ricoh P C300W Field Service Manual

7.Detailed Descriptions
Three TM/P sensors monitor color offset in the main scan and sub scan directions at each point [A]
(left), [B] (center), and [C] (right). They measure and calculate the amount main scan shift and
magnification errors, as well as sub scan shift skew and bending.
The center TM/P sensor is also used to detect the amount of toner coverage in the patterns on the
drum for toner coverage process control.

Process Control Timing and Triggers

The table below describes toner coverage control and the events that trigger MUSIC execution.
Process Control
Timing
At power ON
Recovery from
Sleep Mode
270
Process Control Triggers
AIO replacement detected
Count reset done after replacement of ITB unit
When changes in ambient conditions are detected
Other than above
AIO replacement detected
Count reset done after replacement of ITB unit
When changes in ambient conditions are detected
Other than above
Control Action
Toner coverage control,
and MUSIC execute
Toner coverage control,
and MUSIC execute
*1 Toner coverage control,
and MUSIC execute
MUSIC executes
Toner coverage control,
and MUSIC execute
Toner coverage control,
and MUSIC execute
*1
Toner coverage control,
and MUSIC execute
No action