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Main Unit Theory of Operation Toner Collecting Section
2-61
II Composition/Operation
10.3.7 Waste toner full condition detection control
A. Waste toner full condition detection control
• A waste toner full condition is detected when the cumulative total number of print dots
(waste toner detection dot count) exceeds a predetermined value after a Waste Toner
Box near-full condition has been detected.
• A waste toner full condition warning is given on the panel at this time.
• The machine accepts no print job after the waste toner full condition has been detected.
B. Waste toner dot count
• The waste toner dot count is taken since the waste toner near-full condition was
detected.
C. Waste toner status decision after detection of a waste toner full condition
• Opening and closing the Front Door resets a waste toner full condition. The control state
then proceeds to “waste toner status decision.”
• If the Waste Toner Full Sensor (PC11) continuously outputs a voltage of a predetermined
value or more for a predetermined period of time or more during “waste toner status deci-
sion,” the control state proceeds to “full condition.”
• If the Waste Toner Full Sensor (PC11) does not output continuously a voltage of a prede-
termined value or more for a predetermined period of time or more during “waste toner
status decision,” the control state proceeds to “waste toner full condition reset decision.”
Power source
Full condition
Waste toner /
Status decision
Full condition
detection
Full condition
reset decision
Near-full
condition reset
Near-full
condition
4138to2137e2
Power source
Full condition
Waste toner /
Status decision
Full condition
detection
Full condition
reset decision
Near-full
condition reset
Near-full
condition
4138to2137e3
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