PCDU
D0CA/D0C9/D0C8/D0CB 7-48 SM
After a job (not between consecutive jobs), the OPC drum is neutralized using the laser
of the Laser Unit.
Differences between K and CMY
Left: K
Right: CMY
The following points are the differences between K and C MY.
K CMY
Lubricant [B] quantity K > CMY
Lubricant application method Arm [A] Pressure spring [C]
Silencer [D] Available Available
The silencer [D] is an internal layer of the OPC drum, added to reduce sound during rotation.
7.6.3 DEVELOPMENT UNIT
• Developer Agitation Mechanism
The developer is agitated by the upper [A] and lower [B] transport coils.
Toner and developer are regulated by the doctor blade [F], and applied to the development
roller [D].
• Toner Density Detection Mechanism
TD sensors (S14-S17) [C] detect the toner density. Toner is supplied when the toner
density is not sufficient.
• Toner Density Control
The ID sensors (S27-S29) at the lower right of the ITB detect the amount of light reflected
from the ITB and detects the toner density. Toner is supplied based on the information
which the ID sensors (S27-S29) detect.
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