Panasonic KV-S1025C-S Service Manual ▷ View online
13
5 SECTIONAL VIEWS
5.1.
CCD
5.2.
Rollers and Sensors
Optical Unit (F)
Optical Unit (B)
Conveyor Motor
Conveyor Roller
Starting Sensor
Exit Roller
Free Rollers
Double-feed Prevention Roller
Door Detector
Paper Sensor
Paper Feed Roller
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5.3.
Boards
PANEL Board
DOOR DETECTION Board
STARTING SENSOR Board
CONTROL Board
PAPER SENSOR Board
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6 MECHANICAL FUNCTION
6.1.
Paper Feed Mechanism
Fig. 6.1
1. When the document is set on the Feed Tray, and its presence is detected by the Paper Sensor, the scanning command
from PC will allow the Conveyor Motor to be driven, which will rotate the Paper Feed Roller, Conveyor Roller, and Exit Roller
in the direction of the arrows.
in the direction of the arrows.
2. When the document enters into the separation section inside the paper feed section, the Double-feed Prevention Roller
(supported by shaft fixed via a torque limiter) exerts a manipulation force onto the document, which depends on the
set torque.
In case of continuous paper feed, the 1st document is separated from the 2nd or more documents by this manipulation
force, and is fed to the scanning section.
set torque.
In case of continuous paper feed, the 1st document is separated from the 2nd or more documents by this manipulation
force, and is fed to the scanning section.
3. When the leading edge of the document advances to the Conveyor Roller position, the document is conveyed at a faster
speed, that is 2.6 times as fast as the speed of the Paper Feed position.
4. When the leading edge of the document pushes down the Starting Sensor’s arm, the leading edge is detected, and
scanning the image will start after a certain interval.
5. When the trailing edge of the document passes through the separation section, the continuous rotation of the Paper Feed
Roller during a series of scanning, enables the following document to be conveyed.
(Different speed between the rotation of the Conveyor Roller and that of the Paper Feed Roller rotation makes up a distance
between the 1st document and the 2nd.)
(Different speed between the rotation of the Conveyor Roller and that of the Paper Feed Roller rotation makes up a distance
between the 1st document and the 2nd.)
6. Repeat the above steps 2 to 5.
7. When the Paper Sensor detects no document, and the Starting Sensor detects the trailing edge of the document, the
7. When the Paper Sensor detects no document, and the Starting Sensor detects the trailing edge of the document, the
Conveyor Motor will stop rotating after a certain interval to end a series of scanning sequence.
Note:
When the scanner’s buffer becomes full, the scanner stops to prevent buffer overflow, while allowing the data
to be transferred to the PC continuously. When enough free buffer area is secured again, the scanner resumes
the scanning process.
to be transferred to the PC continuously. When enough free buffer area is secured again, the scanner resumes
the scanning process.
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6.2.
Sensor Mechanism
6.2.1.
Paper Sensor
The Paper Sensor turns ON, when the document is properly placed on the Feed Tray, pushing the arm up away from the
sensor.
sensor.
6.2.2.
Starting Sensor
The Starting Sensor turns ON when the document is fed to the scanning-start position, pushing the arm down away from
the sensor.
the sensor.
6.2.3.
Door Detector
The Door Detector turns OFF when the ADF Door is closed, interrupting the detector with the claw.
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