Oki B6500 Service Manual

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Chapter 6 Principles of Operation
5.3 Xero
EP CARTRIDGE
The EP CARTRIDGE is also known as CRU (Customer Replaceable Unit), and is
made up of the following five components.
-Drum
This is a cylinder of aluminum and coated with a photoconductive material. Because of this
photoconductive coating layer, electric charges are retained on the surface in the dark, and
electrical conduction occurs when exposed to light.
-BCR (Bias Charge Roll)
This uniformly distributes electric charges over the drum surface, and erases a charge-
reduced pattern remaining from the previous cycle.
-Magnet Roll
This holds toner as a thin layer on the surface of this roll, and acts to transport the toner into
the gap between the drum and Magnet Roll. The toner is supplied to the Magnet Roll by the
Agitator in the Toner Compartment.
-CM Blade (Charging and Metering Blade)
This spreads the toner into a thin layer over the Magnet Roll, and applies negative charges to
the toner tribo-electrically.
-Cleaning Blade
This scrapes toner remaining after the transfer step off the drum surface.
BTR ASSY
The BTR of the BTR ASSY is in contact with the drum of the EP CARTRIDGE, and
is driven by the Drum Gear. When the paper moves between the BTR and Drum,
the BTR applies positive charges to the rear surface of the paper. The negatively
charged toner image is attracted by positive charges on the rear surface of the
paper. Thus, the image is transferred from the surface of the drum to the surface of
the paper.

Oki B6500 Specifications

General

Color	No
Duplex printing	Yes
Maximum resolution	1200 x 1200 DPI
Time to first page (black, normal)	8 s
Print speed (black, normal quality, A4/US Letter)	45 ppm
Flash memory	512 MB
Storage media	HDD
Internal memory	128 MB
Maximum internal memory	640 MB
Internal storage capacity	40 GB
Total input capacity	700 sheets
Total output capacity	500 sheets
Maximum input capacity	1800 sheets
Power requirements	230V
Standard media sizes	3\
Power consumption (active)	880 W
Compatible operating systems	Windows, XP (Home, Professional); 2000 (Workstation, Professional, Server, Advanced Server – SP4 +); NT 4.0 (Workstation, Server – SP6 +); ME; 98/98 SE; Mac OS 9.1+/10.1+; Unix (Sun Solaris 8, 7, 2.5; HP-UX 11.0/ 10.20); Linux (Redhat 6.x).
Envelopes sizes	C5, DL
Media weight (tray 1)	60 - 216 gsm
Non-ISO print media sizes	Executive (184 x 267mm), index card, Letter (media size), Statement (140 x 216mm), Legal (media size)
ISO A-series sizes (A0...A9)	A4, A5, A6
ISO B-series sizes (B0...B9)	B5
Maximum ISO A-series paper size	A4
PCL fonts	86
Printer fonts	PCL, PostScript
Maximum duty cycle	200000 pages per month
Number of PostScript fonts	136
Power consumption (standby)	110 W
Power consumption (printing)	1200 W

Weight and Dimensions

Dimensions (WxDxH)	422 x 465 x 404 mm