Ricoh A250 Service Manual page 99

Toner End Detection
High
Low
There is no toner end sensor in this machine. Instead, toner end is detected using
the toner near-end sensor.
When the toner near-end sensor detects a low toner condition for five seconds
continuously [A], the machine starts the toner near-end copy counter.
From this point, toner near-end/end detection depends on the settings of SP2-213
and 2-214. The following describes what happens with the default settings.
If the toner concentration is still low after 210 copies, the machine detects a toner
near-end condition [B]. The number of copies between starting the counter and
toner near end [D] can be changed with SP2-214.
If the toner concentration is still too low 150 copies after toner near-end was
determined, the machine detects a toner end condition [C]. If toner end is detected,
the machine stops and copying/printing is disabled. The number of copies between
toner near-end and toner end [E] can be changed with SP2-213.
The total number of copies between starting the copy counter and toner end [F]
depends on the SP2-214 and SP2-213 settings. The default is 150 + 210 = 360
copies.
SM
ALL-IN-ONE CARTRIDGE (AIO CARTRIDGE)
[A]
5 s [D]
[F]
2-41
[B] [C]
[E]
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A250