Toner Cartridge’s Applied Voltage
Three types of voltages are applied to a toner cartridge. The necessary voltage is applied to
development roller via develop voltage applied spring (A) and development roller plate (D), and to add
roller via add voltage applied spring (B) and add roller plate (E), and to doctor blade via DB voltage
applied spring (C) and DB plate (F).
Toner Cartridge and Drum Unit Replacement
Drum unit has a life Cycle of A4 with 5% chart as base and the machine displays “DRUM CARTRIDGE
CHANGE” message to notify the user to replace the drum unit when it exceeds 34,000 sheets by
calculating LSU dot count or drum rotation, but it still can print even if it is not replaced with a new drum
unit. But the image quality cannot be guaranteed.
As like the toner cartridge, the drum unit has a chip installed to record model information, sheet usage
for enclosed or AM drum unit and recycle information.
As like the drum unit, the toner calculates LSU dot count or drum rotation with A4 with 5% chart as base
and when 2.2K sheets 2.5K toner and 4.5K/7.5K sheets for 5K/8K toner are reached, the Toner Low
message is notified to the user to replace it.
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