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Theory of Operation Ver. 8.0 Jun. 2008
13. Toner supply section
6
7
Composition/Operation
B. Toner cartridge empty control
• After the toner cartridge empty condition is detected, if the sub hopper toner empty sen-
sor continuously detects toner empty 10 times or more, the toner empty warning is dis-
played.
C. Sub hopper toner empty detection
• After a near-empty condition is detected, the toner density detected by the TCR sensor,
at every T/C ratio detection timing, is compared with the target toner density to calculate
the density difference. The count number defined according to each density difference is
added, and when the value reaches the given level, toner empty warning is displayed.
• A different toner empty screen is displayed if “User” is selected for “Unit change” avail-
able from the Service Mode.
A00KT2E007DA
A00JT2E506DA
A00HT2E307AA
Toner cartridge empty
Toner cartridge near-empty
Sub hopper empty
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Y107522-3 Theory of Operation
