Toner Near-Empty And Toner Empty Detection Control - Develop QC 2235 Plus Service Manual

QC 2235plus Theory of Operation Ver.1.0 Mar. 2004
9.3.2

Toner Near-Empty and Toner Empty detection control

• A toner near-empty/empty condition is detected by the Toner Near-Empty Sensor PQ
and LED mounted on each of the Toner Cartridges.
• A toner empty condition is detected by the ATDC Sensor.
• Detection timing
1. The number of times is detected, in which the sensor remains activated for a given
period of time or more while the Agitating Blade turns one complete turn. If this count
reaches two, a toner near-empty condition is detected and the machine gives a corre-
sponding warning display.
2. A toner empty condition is detected if the T/C reading taken by the ATDC Sensor is
lower by 0.5% than the target value for a given continuous period of time after the toner
near-empty condition has been detected. The machine is then brought to a stop.
3. The toner empty condition is reset if the Toner Near-Empty Sensor remains deactivated
for a given period of time or more after the Toner Cartridge set lever has been unlocked
and locked or the Power Switch has been turned OFF and ON.
Toner Near-Empty Sensor
LED/Y, M, C, Bk (PC21,
PC22, PC23, PC24)
Toner Near-Empty
• A different toner empty screen is displayed if "User" is selected for "Unit Change" avail-
able from the Tech. Rep. mode.
Clear Window
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Toner Supply section
Toner Near-Empty Sensor
PQ/Y, M, C, Bk (PC15,
PC16, PC17, PC18)
Toner Empty
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