Differences Between the D014/D015 & B132/B200
D014/D015/D078/D079 D-50 SM
Laser Writing
In line with the improvement in the line speed, the speed of the polygon motor has been
increased. (This follows similar improvement in other machines.)
Paper Feed
In response to requests for better handling of thick paper, some changes have been
done within the restricted range of the present B132/B200 layout.
Some minor changes have been done in the paper feed trays (developed based on
B132/B200) to allow feeding thicker paper.
There are no changes in paper registration.
Some small changes have been done within the limitations of the present design of the
duplex/inverter unit for better handling of thicker paper and for reduction of paper curl.
Development, Toner Supply
Adoption of high-resolution oil-less polyester polymerization toner (hereafter "PxP
toner").
A new STC (Soft Toner Cartridge) that contains toner pre-mixed with 10 wt% carrier is
used to fill the development units.
A new single-direction development method has been devised to reduce uneven image
density on a single page and reduce developer deterioration.
In order to improve the precision of heat reduction, an aluminum steel sleeve has been
adopted. Also, Vs/Vp have been reduced to correct blurring at the trailing edges of solid
images
Automatic developer installation.
Drum Charge, Cleaning
The following measures have been adopted to deal with the problems of blade service life
and dirty OPC drums, caused by the slippage of PxP toner on the ITB:
The K PCU uses the Scorotron Charge Method that uses a self-cleaning charge corona
wire, and an auxiliary cleaning brush.
The other PCUs (Y,M,C) use charge rollers with retractable cleaning rollers and auxiliary
cleaning brushes.
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