• Date of unit installation
• Unit total counter at installation (no. of sheets, travel distance)
• Date of unit operation
• Unit total counter during operation (no. of sheets, travel distance)
• Unit parts information
• Total counter
• Total color counter
Pressure release filter
To prevent scattering of toner, the air pressure in the development unit is released via a filter.
Development drive
The following table shows the drive components for each model.
A gear for developer coil rotation is provided on the front side of the unit (downstream side).
MP C3004/C3504:
Drive source for Bk Drive source for C, M, Y
PCU: Black / Image Transfer Motor Development Motor: CMY
The PCU: Black / Image Transfer Motor is also used for the image transfer unit and waste toner bottle.
Drive is switched by the development solenoid.
MP C4504/C5504/C6004:
Drive source for Bk Drive source for C, M, Y
Development Motor: Black Development Motor: CMY
Development Bias
Applied from the development power pack via a plate spring on the front cover of the PCDU.
Removal of PCDU Seals
Seals for all colors of MP C4504/C5504/C6004, and for Bk of MP C3004/C3504 will be wound
up with the winding lever [B].
Remove the seal by winding it with the shaft [A] on the vent filter side.
PCDU (Photo Conductor and Development Unit)
1241
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