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Service Manual for OF5800
Chapter 2 Machine Operations
A electrostatic latent image is made by the laser beam emitted from the Print Head Unit.
Sub-scanning Direction (vertical)
When the printer receives the PRINT signal, the Polygon Motor and the Main Motor rotate and paper is fed
into the printer.
The printing in the sub-scanning direction starts when the PWB-P sends the VIDEO signal to the Printer
Head at a specified time after the leading edge of the paper activates the Paper Sensor (TOD signal).
The print starting position of the 2nd line is determined by delaying the VIDEO signal.
In the scanning direction (horizontal)
The SOS (Start Of Scan) Sensor is installed on the Laser Diode Drive (PWB-D) to synchronize the laser
timing for each scan line.
NOTE:
Do
NOT
clean the lenses or mirrors in the Print Head Unit.
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business
Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)