Oki MC561 User Manual

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Oki Data CONFIDENTIAL
2. DESCRIPTION OF OPERATION
(1) Electrophotographic process
The electrophotographic process is explained briefly below:
1. Charging
A voltage is applied to the CH roller to electrically charge the surface of the
OPC drum.
2.
Exposure
The LED head radiates light onto the charged OPC drum surface in
accordance with an image signal. The electric charge of the radiated part
of the OPC drum surface attenuates depending on the intensity of the light,
thus forming an electrostatic latent image on the OPC drum surface.
3.
Development
Charged toner adheres to the electrostatic latent image of the OPC drum by
electrostatic power, and forms a visible image on the OPC drum surface.
4.
Transfer
Paper is placed over the OPC drum surface and an electric charge is
applied to it from the backside by the transfer roller, so that the toner image
is transferred to the paper.
5.
Fusing
Heat and pressure are applied to the toner image on the paper to promote
its fusion.
6.
Drum cleaning
The drum cleaning blade removes toner remaining on the OPC drum after
transfer.
7.
Static elimination
Residual potential on the image drum is removed.
8. Belt cleaning
The belt cleaning blade removes toner remaining on the belt.
2.1 Electrophotographic process mechanism
(2) Charging
A voltage is applied to the charging roller, which is placed in contact with the OPC
drum surface, to charge the OPC drum surface.
(3
) Exposure
The light emitted from the LED head is radiated onto the charged OPC drum
surface. The charge of the radiated part of the OPC drum attenuates according to
the intensity of the light, forming an electrostatic latent image on the OPC drum
surface.
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Power
supply unit
Paper
OPC drum
OPC drum
LED head
LED head
Charging roller
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Power
supply unit
Charging roller
OPC drum

Oki MC561 Specifications

Printing Specifications

Print Speed	Up to 27 ppm color, 31 ppm black & white
Time to First Page	As fast as 8 seconds in color, 7.5 seconds in black & white
Print Resolution	Up to 1200 x 600 dpi

Copying Specifications

Copy Speed	Up to 27 cpm color, 31 cpm black & white
First Copy Out	As fast as 14 seconds in color, 12 seconds in black & white
Copy Resolution	Up to 600 x 600 dpi

Scanning Specifications

Scan Type	Color and black & white flatbed
Scan Resolution	Up to 1200 x 1200 dpi
Scan Speed	Approx. 3 sec./page color, approx 2 sec./page black & white at 300 dpi

Fax Specifications

Fax Modem	33.6 Kbps Super G3
Transmission Speed	3 seconds/page
Fax Resolution	Up to 200 x 400 dpi

System Memory

Standard Imaging RAM	256 MB
Max Imaging RAM	768 MB
SD Card Storage	4 GB standard; 16 GB optional

Paper Handling

Scanner RADF Capacity	Up to 50 letter/legal sheets
Standard Input	350 sheets (250 sheets via Main Tray + 100 sheets via MPT)
Maximum Input	880 sheets (with optional 530-sheet 2nd Paper Tray)

Environmental Specifications

Size	16.8" x 20" x 17.5" (42.7 cm x 50.9 cm x 44.4 cm)
Weight	63 lb. (29 kg)
Power Consumption	Operating Normal 570W; Max 1170W; Idle 100W; Power Save 20W; Deep Sleep <1.5W