Konica Minolta bizhub C658 Service Manual page 1949

bizhub C658/C558/C458/C368/C308/C258
[5]
[4]
[1] Reading motor (M3)
[3] CIS module (CIS)
[5] Reading roller 1
5.3.2 Reading roller pressure/retraction control
• Original speed fluctuates as the trailing edge of the original moves past reading roller 1. To inhibit these speed fluctuations, the reading
roller pressure/retraction motor is employed to retract reading roller 1.
• The rotation of the cam is driven by the reading roller pressure/retraction motor via the gear.
• Due to the rotation of the cam, the lever is put back and the reading roll being pressed against the reading roller 1 is pushed down.
[6]
[5]
[4]
[1] Reading roller pressure/retraction motor (M6)
[3] Reading roller 1
[5] Lever
5.3.3 DF original glass contamination prevention control
(1) DF original glass cleaning
• A reading line can occur if the DF original glass is contaminated with dust or dirt. The DF original glass cleaning mechanism prevents this
fault from occurring.
• The cleaning brush rotates to remove dust sticking to the DF original glass.
• The cleaning brush is rotated by the front side cleaning motor.
• The front side cleaning home sensor detects the cleaning brush at its home position.
PA THEORY OF OPERATION DUAL SCAN DOCUMENT FEEDER/SP-501/UK-501
[1]
[2]
[3]
[2] Reading roller 3
[4] Reading roller 2
- -
[1]
[2]
[3]
[2] Read roller home sensor (PS8)
[4] Reading roll
[6] Cam
PA-11
(bizhub C658/C558/C458) > 5. READ SECTION