Konica Minolta bizhub C658 Service Manual page 1964

bizhub C658/C558/C458/C368/C308/C258
[1]
[2]
[1] Swing arm (standby position)
[3] Swing arm (feed position)
(2) Down control
• When the start key is pressed, the document feed motor starts rotating forward. The rotation shaft of the swing arm mounted on the
same shaft as the document feed roller is rotated forward, so that the original pick-up roller is lowered to the feed position.
• The document stopper is unlocked when the swing arm lowers.
3.1.4 Document feed/separation control
• When the start key is pressed, the document feed motor starts rotating forward, so that the document feed roller rotates forward.
• The rotation shaft of the swing arm mounted on the same shaft as the document feed roller is rotated forward, so that the document pick-up
roller is lowered to the feed position. The document pick-up roller is rotated by a drive belt to thereby feed the original onto the document
feed roller.
(1) Separation/feed operation
1. The document separation roller is pressed up against, and driven by, the document feed roller. A torque limiter is mounted on the shaft of
the document separation roller.
2. The acting pressure of the document feed roller/document separation roller/torque limiter serves as the limit torque for preventing double
feed.
3. When there is no original or only one sheet of original between the document separation roller and the document feed roller, the limit
torque is exceeded and the document separation roller follows the rotation of the document feed roller.
4. If there are two or more sheets of original between the document separation roller and the document feed roller, the limit torque is greater
than the friction force of the original, so that the document separation roller stops rotating.
5. Because of the stationary document separation roller, the lower sheet of original in contact with the document separation roller is not fed
in, so that the first sheet of original is original separated from the second sheet of original.
[1]
[4]
[1] Document feed motor (M2)
[3] Document separation roller
[5] Original
(2) Periodically replaced parts
• The document pick-up roller, document feed roller, and document separation roller are periodically replaced parts.
• At replacing the rollers, the paper feed assembly (document pick-up roller + document feed roller) and document separation roller must
be replaced at the same time.
• Otherwise, the document pick-up roller, document feed roller, and document separation roller must be replaced at the same time.
• None of the document pick-up rollers, document feed rollers, and document separation roller are provided with a new article detection
mechanism. When the three rollers are replaced with new ones, the "ADF Feed" counter must be reset to zero using
the Service Mode.
[3]
[4]
[2]
[3]
PB THEORY OF OPERATION DF-629 > 3. OPERATION
[2] Document stopper
[4] Document pick-up roller
[2]
[4]
[5]
[3]
[2] Document pick-up roller
[4] Document Feed roller
- -
PB-7
"Counter / Life" of