Oki MC860 Maintenance Manual

43967002TH Rev.1
33 /
Oki Data CONFIDENTIAL
2. Theory of Operation
(6) Fix
The toner image that is transferred to paper is fused on the paper when heat and
pressure are applied while a paper passes through the contacting point between
the heat roller and the backup roller unit (the backup roller, the pad and the fuser
belt).
The
heat roller is heated by the internal halogen lamps of 800W and of 350W.
The backup roller is heated by the internal halogen lamp of 50 W. The fusing
temperature is controlled by the sum of the temperature that is detected by the
thermistor which is not contacting with the heat roller surface, and the temperature
that is detected by the thermistor which is contacting with the backup roller surface.
For safety purpose, thermostat is provide. If the heat roller temperature increases
higher than the specified temperature, the thermostat opens so that the voltage
supply to the heat is shut down. The backup roller unit is pressed against the heater
by the pressure springs on both sides.
(7)
Drum cleaning
The toner that is not used for fusing and remained on the OPC drum surface is
scraped off by the drum cleaning blade and is collected in the waste toner area of
toner cartridge.
Heat roller
Backup roller
Pad
Thermistor
Thermistor
Thermostat
Paper
Thermostat thermistor
Fuser belt
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ID unit
Waste toner area
Toner cartridge
Drum cleaning blade
(8) Belt cleaning
The toner that is remained on the transfer belt is scraped off by the belt cleaning
belt and collected in the waste toner box.
Belt waste toner box
Transport belt
Belt cleaning blade

Oki MC860 Specifications

Printing Specifications

print speed color	26 ppm
print speed black & white	33 ppm
time to first page color	10 seconds
time to first page black & white	9.5 seconds
print resolution	1200 x 600 dpi
processor	500 MHz PowerPC CPU
duty cycle	75, 000 prints per month

Copying Specifications

copy speed color	26 cpm
copy speed black & white	33 cpm
first copy out color	14.5 seconds
first copy out black & white	13 seconds
copy resolution	600 x 600 dpi

Scanning Specifications

scan type	Color and black & white
max scan area	11" x 17"
scan speed black & white	33 spm
scan speed color	26 spm
scan resolution	600 dpi

Fax Specifications

fax modem	33.6 Kbps Super G3
transmission speed	2 seconds/page
fax resolution	600 x 600 dpi
speed dial locations	500 locations
broadcast transmission locations	530 locations

Power and Acoustic Noise

power consumption peak	1, 300W
power consumption standby	160W Avg.
power save mode	≤25W
acoustic noise operating	54dB
acoustic noise standby	≤37dB

System Memory

standard imaging RAM	512 MB
max imaging RAM	768 MB
hard disk drive	40 GB

Weight and Dimensions

1-tray configuration dimensions	22.2" x 25.9" x 26.3"
2-tray configuration dimensions	33.3" x 30.2" x 44.5"
weight 1-tray configuration	149.9 lb
weight 2-tray configuration	200.6 lb
weight 3-tray configuration	211.6 lb