Specifications

13-10. Auxiliary Toner Replenishing (User Mode Function)
•
The copier is set into the Auxiliary Toner Replenishing mode when the User
Mode Key on the control panel is pressed and then Toner Replenisher
selected on the Touch Panel. It drives the Sub Hopper to let it feed toner
into the Developing Unit, thereby increasing the toner-to-carrier ratio of the
developer.
•
When Toner Replenisher is selected, the CPU compares the current
toner-to-carrier ratio with the "T/C Control Level" set by the AIDC Sensor
T/C Control. If the current T/C ratio is lower than the setting, auxiliary toner
replenishing is carried out. If the ratio is higher than the setting, the
Developing Unit is driven to mix the developer well.
•
Toner replenishing is intermittent to prevent toner from scattering and to
ensure that toner and carrier are sufficiently triboelectrically charged.
= Operation =
Toner Replenisher is selected.
PC Drum Drive Motor M5 is energized. = The Developing Unit is energized
to mix the developer.
ATDC Sensor UN8 takes readings of the T/C every 5 msec. for 280 msec.
and the CPU compares them with the T/C Control Level.
If the readings are lower than the setting
➀
Sub Hopper Toner Replenishing Motor M15 is energized for 2 sec.
➁
While the developer is being mixed for 1 sec., UN8 takes readings
of the T/C every 5 msec. for 280 msec. and the CPU compares
them with the T/C Control Level.
•
When the T/C Control Level is reached after steps
➀
and
➁
have
been repeated, toner replenishing is stopped. For 30 sec. thereafter,
the developer is mixed before the sequence is completed.
•
Steps
➀
and
➁
are repeated up to 30 times and, even if the T/C
Control Level is not reached, the sequence is terminated after the
mixing of developer for 30 sec.
If the readings are higher than the setting
M5 is deenergized and the sequence is terminated.
•
If a copy cycle is started during the toner replenishing sequence, the
sequence is interrupted and, after the copy cycle is completed, the
developer mixing is carried out.
•
The Toner Replenisher function is rejected while the copier is warming up
or toner is empty in the Sub Hopper.
M-88