Panasonic KV-SS905C Service Manual ▷ View online
5.2. Circuit Boards
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KV-SS905C
5.3. Sensors (Boards)
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KV-SS905C
6 MECHANICAL FUNCTION
6.1. Paper Feed Mechanism
Fig. 6-1
1. When PC starts to output the scanning-start command signal after setting documents on the Hopper (detecting the document’s
existence by the Paper Detector), the Hopper goes up at the position which is good enough to attach the document to the Paper
Feed Roller, and to feed papers.
Feed Roller, and to feed papers.
Note
“Hopper position control mechanism” is shown in Fig. 6-5.
2. The Conveyor Motor starts to move to rotate the group of the Conveyor Rollers.
3. When the Paper Feed Motor starts, the Paper Feed Roller and the Separation Roller turn in feed direction (
). The Retard
Roller is supported by a shaft fixed via a torque limiter, and it is pushed against the Separation Roller. When the document
enters into the separation section, the Retard Roller exerts a manipulation force onto the document, which depends on the set
torque. In case of continuous paper feed, the document is separated by this manipulation force and is fed to the reading section.
When multiple sheets are fed, the Retard Roller is pushed down by the cam action when the ADF Separator is turned all the
way to the left, so that it separates from the Separation Roller and is retracted from the transport surface. By this, the document
is not manipulated and is fed to the reading section.
enters into the separation section, the Retard Roller exerts a manipulation force onto the document, which depends on the set
torque. In case of continuous paper feed, the document is separated by this manipulation force and is fed to the reading section.
When multiple sheets are fed, the Retard Roller is pushed down by the cam action when the ADF Separator is turned all the
way to the left, so that it separates from the Separation Roller and is retracted from the transport surface. By this, the document
is not manipulated and is fed to the reading section.
4. When the leading edge of the manuscript having passed the separation section passes the Waiting Sensor, the Paper Feed
Motor stops and the Paper Feed Roller and the Separation Roller turn together.
5. When the leading edge of the document passes the Starting Position Sensor, reading starts after a specified timing (the time
required for transport from the Starting Position Sensor to the reading position).
6. When the trailing edge of the document passes the Waiting Sensor and the buffer memory can hold four pages or more, the
Paper Feed Motor starts again and the next document is fed.
7. Afterwards, the steps (3) to (6) are repeated.
8. When the trailing edge of the document passes the Waiting Sensor and the buffer memory does not have space for four pages
or more, the Paper Feed Motor starts again, the next document is fed, and when the leading edge of the next document has
passed the Waiting Sensor, the Paper Feed Motor stops and standby is performed until the next read command comes from
the PC.
passed the Waiting Sensor, the Paper Feed Motor stops and standby is performed until the next read command comes from
the PC.
9. When a read command comes from the PC, the Paper Feed Roller starts again and the standby document is fed to the reading
section.
10. Afterwards, the steps (3), (4), (5), (8), and (9) are repeated.
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KV-SS905C
6.2. Feed Roller Mechanism
Fig. 6-2
The rotation of the Paper Feed Motor in arrow direction is transmitted to the Separation Roller via the Motor Pulley, the Paper Feed
Belt, the Pulley Gear, the Gears A, B, and C, and the Separation Roller Shaft, it is also transferred to the Paper Feed Roller via
the Gears D, E, and F, and the Paper Feed Roller and the Separation Roller are driven in the document feed direction indicated
by the bold arrow. The Retard Roller is in contact with the Retard Shaft via a torque limiter, and as the Retard Shaft is supported
by the U-groove of the Retard Mounting Plate, the built-in torque limiter of the Retard Roller operates and prevents entry of the
second or further documents when more than one document is fed at a time.
Belt, the Pulley Gear, the Gears A, B, and C, and the Separation Roller Shaft, it is also transferred to the Paper Feed Roller via
the Gears D, E, and F, and the Paper Feed Roller and the Separation Roller are driven in the document feed direction indicated
by the bold arrow. The Retard Roller is in contact with the Retard Shaft via a torque limiter, and as the Retard Shaft is supported
by the U-groove of the Retard Mounting Plate, the built-in torque limiter of the Retard Roller operates and prevents entry of the
second or further documents when more than one document is fed at a time.
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