Panasonic UF-580 Service Manual page 190

Paper Feed Unit No. 2 (Optional) Operation
The Paper Feed Unit No.1 always takes priority. The Paper Feed Unit No. 2 becomes operational only
when the cassette No.1 runs out of paper and the NP Sensor is deactivated, causing the nPCHK1 output
signal level to go High.
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 (908) is energized for a specified period of time and is turned ON. This
activates the Paper Feed Roller (911), which rotates one revolution. The paper is separated into
individual sheets by the L and R Paper Separation Clips (809) (811) and transported to the Feed
Roller 2 (904).
3. After one revolution the Paper Feed Roller (911) stops, releasing the paper. The Feed Roller 2 (904)
and 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).
No Paper Actuator (525)
Paper Feed Solenoid (531)
CST2 PC Board (1009)
No Paper Actuator (922)
Paper Feed Solenoid (908)
Paper Feed Roller (518)
Clutch Gear Assembly
SNS3 PC Board (1009)
L and R Paper Separation Clips (809, 811)
Feed Roller (526)
SNS1 PC Board (1008)
L and R Paper Separation Clips
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Timing Actuator (609)
Pinch Roller (607)
Feed Roller (904)
Pinch Roller (919)
Paper Feed Roller (911)
Clutch Gear Assembly
(809, 811)