Toner Cartridge; Toner Level Detection - Canon i-SENSYS MF229dw Service Manual

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Technical Overview > Image Formation System > Toner Cartridge > Specification of Toner level display

Toner Cartridge

■ Toner Level Detection

● 4in1Model
Toner level is detected by the Toner Sensor (Magnetic Sensor). When a Toner Cartridge is
installed, the Toner Sensor contacts with the lower side of the cartridge and it converts the
magnetic changes in the cartridge into voltage.
Then, CPU of engine controller PCB compares the output voltage of the Toner Sensor with
the reference value to detect the toner level.
Toner level detection is performed at startup of the Main Motor.
The toner level detection sequence starts after the Main Motor is started up and stabilization
time (200msec) has passed. The toner level detection sequence continues until the Main
Motor stops. There are following 2 types of toner level detection sequence: sequence at
warm-up rotation when opening door or turning ON the power, and sequence at normal
rotation.
1) Sequence at normal rotation
From the start of detection, detection value of magnetic toner is sampled for every 5 msec.
Remaining toner level is judged based on the average value and ripple value (V Peak to
Peak) of the Magnetic Sensor output while the Stirring Stick makes a full turn.
Time the Stirring Stick makes a full turn and number of samples
In case the process speed is 150mm/sec, time is 1.9 sec (380 samples).
In case the process speed is 75mm/sec, time is 3.8 sec (760 samples).
2) Sequence at warm-up rotation
Conditions of sampling and remaining toner level judgment are the same as those
mentioned above.
However, in the case that toner Low is detected even at once during warm-up rotation
sequence, toner Low is remained to be displayed.
● 3In1 Model
This equipment has no function of toner level detection.
2 Technical Overview > Image Formation System > Toner Cartridge > Specification of Toner level display
■ Specification of Toner level display
Toner level can be checked by pressing Status Monitor/Cancel key and selecting toner level.
The display of toner level is just a rough indication.
In the case of 4-in-1 models, the toner level is corrected depending on the usage conditions.
In the case of 3-in-1 models, a predicted value is displayed because they do not have the
function to correct the level.
In the following cases, status of toner level is considered as unidentified, and OK (100%) is
displayed on the panel.
• After power-on
• Right after recovery from engine sleep mode
• During opening/closing the door
• When the cartridge is not installed
● 4in1 Model
Display Hnadling
<Prepare a This message notifies you that a
cartridge.> toner cartridge needs to be replaced
soon. Shake the toner cartridge to
evenly distribute the toner inside the
cartridge. Replace the toner cartridge
if you see this message before you
start to print a large job.
<The amount The toner cartridge is about to reach
remaining in the the end of its lifetime. Shake the toner
cartridge is very low.> cartridge to evenly distribute the toner
inside the cartridge. If this does not
improve the print quality, replace the
toner cartridge.
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Complement
• If this message is displayed, the
incoming fax will be stored in the
memory without being printed. Also,
reports are not printed, even if they
are set to be printed automatically.
• You can continue printing when this
message is displayed, but the print
quality may deteriorate.
When a message is displayed
• If the message is displayed when
the machine is receiving a fax or
automatic report output is set,
received faxes and reports will be
stored in the machine so that they
do not appear faded after they are
printed.
• To continue printing even if the toner
is running low, set <Continue Print.
When Near Cart. Life End> to <On>.
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