Konica Minolta bizhub C658 Service Manual page 1972

bizhub C658/C558/C458/C368/C308/C258
3.5 Paper path operation
3.5.1 1-sided mode
1. Pressing the start key will lower the document pick-up roller and press the original.
2. The document pick-up roller, document feed roller and document separation roller will start rotating to start feeding the first sheet of paper.
3. When the paper reaches the registration roller, a loop is formed in the paper. Then, the registration motor is started, so that the registration
roller transports the paper.
4. The document feed motor is deenergized when a predetermined period of time elapses after the registration motor has been activated. The
document reading motor will start running.
5. It starts reading from the leading edge of the original when the document reading sensor turned ON and the predetermined period of time
has passed.
6. The document reading roll will be retracted right before the back edge of the original passes through the document reading roller/1. After a
predetermined period of time, document reading roll will be pressed again to prepare for the next original.
7. The original will be exit by document reading roller/2 and the document exit roller.
8. All motors will turn OFF after the trailing edge of the original turns OFF the document exit sensor and the predetermined period of time is
passed.
3.5.2 2-sided mode
1. In the same manner as in the 1-side mode, the first side of the original is read.
2. After the original moves past document reading roller/2, the document reading motor is rotated backward and the original is transported to
the switchback section.
3. It starts reading from the leading edge of the original when the document reading sensor turned ON and the specified period of time has
passed.
4. To ensure that the front and back sides of the originals are in correct order, the original undergoes the similar switchback operation again
before being fed into the tray.
3.6 DF open/close detection mechanism
3.6.1 Document exchange detection control
• An angle detection mechanism is provided to detect the operation of exchanging originals when the DF is used as the original cover of the
main body.
• When the DF is raised to an angle of about 14.5 degrees or more, the detection lever is pushed up by a spring. The angle sensor that has
been blocked by the detection lever is now unblocked. It is, as a result, detected that the DF "is raised to an angle of 14.5 degrees or
more".
• When, on the other hand, the DF is lowered to an angle of about 14.5 degrees or less, the detection lever is pushed down. Then, the angle
sensor, which has been unblocked, is blocked, so that it is detected that the DF "is lowered to an angle of 14.5 degrees or less".
• When the DF state undergoes changes from a condition of being fully lowered to a condition of "being raised to an angle of 14.5 degrees or
more" and then to a condition of "being lowered to an angle of 14.5 degrees or less", it is determined that "an original is placed manually on
the original glass". Then the original size detection control will be started.
3.6.2 DF open/close detection
• The magnet is installed to detect the open/close status of the DF on the main body side.
• The original cover sensor on the main body will turn ON by the magnet when lowering the DF.
PB THEORY OF OPERATION DF-629 > 3. OPERATION
PB-15