Panasonic DF-1100 Service Manual page 199

ADF Mechanism
The ADF (Automatic Document Feeder) automatically feeds paper into the unit, and consists of the Pre–feed
Roller, ADF Roller and Separation Rubber. Each document is placed face-down on the ADF Guide Plate
before being fed into the unit.
B The Pre–feed Roller (327) moves the bottom document to the ADF Roller.
B The ADF Roller (335) feeds individual pages into the scanning area.
B The Separation Rubber (322) separates documents placed on the ADF Guide Plate, preventing
multiple feeding.
Xenon Lamp (1120)
The DF–1100 has one Xenon Lamp, used as a light source to illuminate the document. The Xenon Lamp
turns ON when the Read Point Sensor is activated by the document leading edge.
Transmit Guide Unit
The Transmit Guide Unit is an auxiliary part used for feeding and ejecting documents. It consists of the ADF
Chassis (311), Transmitter Chassis (353), Feed Roller (349), Eject Roller (354), and Pinch Roller (324). This
unit also provides the white scanning area and serves as a base for electronic white reference.
Transmit Mechanism Drive System
This system feeds documents through the transmitting mechanism, and consists of rollers, gears and a
stepper motor.
B The ADF Transmit Motor (357), a stepper motor, controlled by the CPU, drives the Pre–Feed Roller,
ADF Roller, Feed Roller and Eject Roller, with the speed based on the density of the picture
information.
B The Feed Roller (349) feeds the document to the scanning point.
B The Eject Roller (354) feeds and ejects the document out of the machine.
Transmit Mechanism Sensors [SNS PCB (318)]
B The SNS PC Board (318) performs three functions. The ADF Sensor (PC1), activated by Actuator A
(315), detects the presence of documents on the ADF Tray and multiple pages.
B The RP (Read Point) Sensor (PC3), activated by Actuator B (316), 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 Pre–feed
and ADF Rollers by reversing the Transmit Motor direction.
B The ADF Door Sensor (PC2), activated by Actuator C (317), halts all scanning operations when the ADF
Door is open.
Verification Stamp Unit
The Verification Stamp Unit stamps a mark on the front of the document after the document is successfully
transmitted or stored. It consists of the Stamp Head (1224) and Stamp Solenoid (1223).
System Description
6–3