Panasonic Panafax UF-4000, Service Manual

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6 System Description
6.1. Mechanical Operation
6.1.1. Transmit Mechanism
ADF Mechanism
The ADF (Automatic Document Feeder) automatically feeds paper into the unit, and consists of ADF
Roller and Separation Rubber. Each document is placed face-down on the
Top Cover (117) before
being fed into the unit.
●
The ADF Roller (221) feeds individual pages into the scanning area.
●
The Separator Rubber (206) separates documents placed on the ADF, preventing multiple feeding.
The UF-490 utilizes a CIS (223). The LED Array of CIS turns ON when the Read Point Sensor (Actuator
B) is activated by the document leading edge.
Transmit Mechanism Drive System
This system feeds documents through the transmitting mechanism, and consists of rollers, gears and a
stepper motor.
●
The Transmit Motor (501), a stepper motor, controlled by the CPU, drives the ADF Roller (221),
Scanning Roller (218) and Eject Roller (302).
The speed is based on the density of the picture information.
●
The Scanning Roller (218) feeds the document to the scanning point.
●
The Eject Roller (302) feeds and ejects the document out of the machine.
Transmit Mechanism Sensors
The ADF Sensor on the PNL PCB (703), activated by Actuator A (207), detects the presence of
documents on the ADF Tray and multiple pages.
The
RP (Read Point) Sensor on the PNL PCB (703), activated by Actuator B (208), detects the lead
and trail edges of the document, controlling the reading position. The CPU determines that a document
is jammed if Actuator B is not tripped within a specified time after the ADF Roller starts feeding, and
disengages the ADF Roller by reversing the Transmit Motor direction.
Eject Roller (302)
CIS (223) (Contact Image Sensor)
ADF Roller (221)
Separator Rubber (206)
Actuator B (208) (RP Sensor)
Actuator A (207) (ADF Sensor)
Stamp Solenoid * (227)
Stamp Head * (238)
Stamp Holder * (239)
* Specific Countries Only
Scanning Roller (218)