Confidential
Ref. 2-12
3.3 Toner Cartridge
3.3.1 Methods for Detecting and Counting Toner Life
“Toner Life End” is displayed through the following two ways. First, such indication is displayed
when detection is performed by the toner sensor; second, it is displayed at the time when a
rotation rate of the develop roller reaches its upper limit.
(1) Detection by the toner sensor
The amount of toner remaining can be detected by checking the imperviousness to light of
the toner in the cartridge by means of the transmissive photosensor.
(2) Detection by means of rotation rates of the develop roller reached its upper limit
The upper limit of such rotation rates can be detected before the develop roller becomes
unusable due to wear.
<When a new toner cartridge is inserted after “Toner Life End” is displayed>
Corresponding counter, Setting value Operation
Counter of toner cartridge changes +1
Page counter for each toner cartridge Reset (0)
Coverage for each toner cartridge Reset (0)
Developing bias voltage Reset (Initial setting)
<When a toner cartridge in use is inserted after “Toner Life End” is displayed by toner
sensor detection *
1
>
A count value before changes is continuously indicated as a rotation rate of the develop roller.
Irrespective of the amount of toner, printing becomes disabled when the rotation rate reaches
the upper limit.
Corresponding counter, Setting value Operation
Counter of toner cartridge changes No count up
Page counter for each toner cartridge Continued
Coverage for each toner cartridge Continued
Developing bias voltage Reset (Initial setting)*
2
*
1
Excluding a toner cartridge in use in which there is a little toner remained.
*
2
The developing bias voltage is reset to the initial setting once when a toner cartridge in use
is inserted. After resetting, the developing bias voltage correction is performed so that the
developing bias voltage is corrected according to the amount of toner.
Note:
The descriptions in the above tables apply to all the four colors.
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