Oce 3121, Техническое и сервисное руководство

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504 TSM Océ 3121 Functional description
Computation of Level
When the toner is stirred by the stirring rod, the toner is absent or the toner is
present state is repeated at intervals.
■
The absence of toner is assumed by monitoring the TEP* signal. This occurs
only while the developing clutch remains energised. The periods during
which the developing clutch remains ON are added.
■
The time elapsed from the first toner absent (TEP*) signal up to the end of
the last ‘toner absent signal’ is referred to as T1.
■
The time elapsed from the start of the next ‘toner absent signal’ until the end
of the ‘toner absent signal’ is referred to as T2.
■
Then, the sums are cleared and replaced by alternately adding subsequent T1
and T2.
Based on the results, the absence of toner is assumed for the following:
■
(T1 + T2) > 20 seconds: toner absent, level 1
■
(T1) or (T2) > 160 seconds: toner absent, level 2
Result Operation Resetting
Toner absent level 1 is
assumed if the ‘toner is
absent state’ continued
for 20 seconds or more
during the last two
checks. Toner supply is initiated.
Copying is prohibited.
(FAX reception and
printer output are possi-
ble.) Resetting occurs when
toner has been stirred: by
keeping the developing
clutch ON for 6 seconds.
This is after the control
panel power switch was
switched ON, or the
front door was opened
and closed.
Toner absent level 2 is
assumed if the ‘toner is
absent’ state continues
for 160 seconds or more. Toner supply is initiated.
Copying, FAX output,
and printing are all pro-
hibited. Resetting occurs when
toner has been stirred: by
keeping the developing
clutch ON for 30 sec-
onds. And, toner is
present is detected after
the control panel power
switch was switched ON
or the front door was
opened and closed.
Toner present
Toner absent
(TEP*occurs)
Result cleared Result cleared
T1 T2 T1 T2 T1 T2