Konica Minolta bizhub C658 Service Manual page 1951

bizhub C658/C558/C458/C368/C308/C258
[2]
[3]
[1] White plate affixed
[3] CIS glass
[5] Cleaning brush (Shading correction surface)
5.3.5 CIS control when power is turned ON
1. The LEDs of CIS module are turned ON.
2. The cleaning brush is detected at its home position.
3. The cleaning brush is rotated and brought to a stop at the gain adjustment position.
The gain adjustment is made twice with the cleaning brush at that position.
The gain adjustment is performed near the center of the shading correction surface.
4. After the adjustments, the LEDs are turned OFF.
5. The cleaning brush is rotated and brought to a stop at the home position.
* The same control is performed when the main body exits from the sleep mode.
[1]
[2]
[1] CIS module (CIS)
[3] Cleaning brush (Gain adjustment position)
5.3.6 CIS control when the document is loaded
1. The cleaning brush is detected at its home position.
2. The LEDs of CIS module are turned ON.
3. The cleaning brush is rotated four complete turns.
The cleaning brush cleans the CIS glass during its first turn.
The cleaning brush uses the shading correction surface to perform the shading correction during its second and third turn. The shading
correction is performed (a total of twice).
The cleaning brush uses the shading correction surface to perform "ADF Scan Glass Contamin. Sensitivity" during its fourth turn.
4. The LEDs are turned OFF.
5. The cleaning brush is rotated and brought to a stop at the home position.
NOTE
▪ No operation is performed when the document is loaded if the following function is selected using the service mode: [System 2] -
> [ADF Scan Glass Contamin. Set.] -> [Back Side] -> [ADF Scan Glass Contamin. Sensitivity] -> [Not Set].
5.3.7 CIS control when the start key is pressed
• This control is performed only in the 2-sided original reading mode.
(1) Before a print cycle (back side reading)
1. The cleaning brush is detected at its home position.
2. The LEDs of CIS module are turned ON.
3. The cleaning brush is rotated three complete turns.
PA THEORY OF OPERATION DUAL SCAN DOCUMENT FEEDER/SP-501/UK-501
[4]
[5]
[3]
(bizhub C658/C558/C458) > 5. READ SECTION
[1]
[2] CIS module (CIS)
[4] Cleaning brush (Home position)
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[2] Cleaning brush (Home position)
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PA-13