Panasonic Facsimile UF-590, Service Manual

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6.1.3. Printing Mechanism
The Receive Mechanism consists of the Laser Unit (LSU), OPC (Organic Photo Conductor) Drum, and
various other parts which ensure the normal feeding of recording paper. These components and their
functions are as follows:
Paper Feed Units No.1 and 2
The Paper Feeder Unit No. 2 is available as an option.
Paper Feed Unit No.1 Operation
1. The printing operation begins when the nPRNT (Print Request) output signal level goes Low. The
Printer Motor (626) is initialized.
2. The Paper Feed Solenoid (531) is energized for a specified period of time and turned ON. This
activates the Paper Feed Roller (518), which rotates one revolution. The paper is separated into
individual sheets by the L and R Paper Separation Clips (809 and 811) and transported to the Feed
Roller (526).
3. After one revolution the Paper Feed Roller (518) stops, releasing the paper. The Feed Roller (526)
transports the paper to the drum area.
4. The actual printing process starts at a specified time after the Timing Actuator (609) is activated and
stops at a a specified period of time after the trailing edge clears the Timing Actuator (609).
Bias Transfer Roller (604)
Paper Exit Actuator (730)
Timing Actuator (609)
Printer Motor (626)
Paper Direction
Fuser Unit (701)
OPC Drum
Toner Cartridge
Feed Roller (526)
Paper Feed Roller (518)
Laser Unit (512)
Paper Feed Solenoid (531)
Paper Feed Solenoid (908)
No Paper Actuator (525)
No Paper Actuator (922)
Feed Roller 2 (904)
Paper Feed Roller (911)
2nd Cassette (Option)