Toner End Condition; Toner Near End; Toner End; Toner End Recovery - Ricoh A183 Service Manual

TONER SUPPLY

6.4 TONER END CONDITION

6.4.1 Toner Near End

≥ V
If the CPU detects toner supply level 6 (V + 4S/5) five times
T TS
consecutively, the toner end indicator blinks and the machine goes to the
toner near end condition. In this condition, the toner supply clutch is
energized for 16t seconds for every copy. If a toner sensor voltage lower than
V + 4S/5 is detected twice consecutively during the copy cycle, the
TS
machine recovers from the toner near end condition. (As explained before, t
depends on SP31.)
If the toner sensor voltage does not recover from level 6 during the copy
cycle, the main motor continuously rotates after the copy job is finished, and
the toner supply clutch is energized intermittently for T seconds (T can be
changed using SP23). The CPU monitors the TD sensor voltage during this T
seconds. If the toner sensor voltage returns to level 5 or less in this period,
the machine recovers from the toner near end condition and the main motor
stops.

6.4.2 Toner End

If TD sensor level 6 is detected, the machine supplies toner for T seconds
after the copy job is finished. During this T seconds, if the CPU detects TD
≥ V
sensor level 7 (V + S) three times consecutively, a toner end
T TS
condition is detected and copier operation is disabled.
If the toner sensor voltage stays in level 6 during the T seconds, the machine
keeps the toner near end condition and 50 more copies can be made. After
50 copies, the toner end indicator lights and copying is disabled.

6.4.3 Toner End Recovery

If the main switch is turned off and on, or the upper unit is opened and closed
during a toner end condition, the main motor turns on and the toner supply
clutch is intermittently energized. If the TD sensor voltage does not recover
from level 7 within 40 seconds, the machine stops, keeping the toner end
condition. If the TD sensor voltage level recovers to level 6 or less in this
period, the toner supply clutch on time is reduced and the main motor
continuously rotates for 40 seconds to evenly distribute toner inside the
development unit. The on/off timing of the clutch is set using SP25 and 26.
(These settings should not be changed.)
SM 2-27 A183/A184