Konica Minolta bizhub C658 Service Manual page 1950

bizhub C658/C558/C458/C368/C308/C258
[6]
[5]
[4]
[3]
[1] Reading roller 2
[3] DF original glass
[5] Front side cleaning home sensor (PS18)
(2) Details of DF original glass cleaning
Condition
Predrive Power ON
Existing from sleep
Start key ON Before starting reading
During reading (not
performed in black mode)
After completing reading
last original
5.3.4 CIS original reading control
• The back side of the original is read by the CIS (contact image sensor) module. The image data read by the CIS is transferred to the dual
scan image processing board.
• The CIS original reading section consists of the CIS module, DF power supply and the back side cleaning mechanism.
• The CIS module has two LEDs.
[4]
[3]
[1] Back side cleaning motor (M7)
[3] DF power supply (DFPU)
• A cleaning brush to which a white plate is affixed is disposed on the side opposite the CIS module. Use of a specific position of the cleaning
brush through rotation of the cleaning brush allows the following operations to be performed: "gain adjustment/shading correction", "ADF
Scan Glass Contamin. Sensitivity", and "CIS glass cleaning by the brush".
• "Document passage" is performed at the home position.
• "Shading correction", "gain adjustment", and "ADF Scan Glass Contamin. Sensitivity" are made using the shading surface.
PA THEORY OF OPERATION DUAL SCAN DOCUMENT FEEDER/SP-501/UK-501
[1]
[2]
[2]
[4]
[6]
Rotates the cleaning brush one complete turn to check for its correct operation.
Rotates the cleaning brush one complete turn to perform cleaning.
Rotates the cleaning brush one complete turn to perform cleaning for every two originals
during continuous reading of originals.
Rotates the cleaning brush three complete turns to perform cleaning for each original
during continuous reading of originals, if the despeckle mode is selected.
The cleaning brush tends to curl if repeatedly operated in one direction only, resulting in
poor cleaning performance. To straighten the brush, it is rotated one complete turn in the
backward direction when reading of the last original is completed.
[1]
[2]
[2]
[4]
PA-12
(bizhub C658/C558/C458) > 5. READ SECTION
Cleaning brush
Reading roller 1
Front side cleaning motor (M8)
Cleaning operation
Cleaning brush
CIS module (CIS)