Konica Minolta bizhub C658 Service Manual page 1631

bizhub C658/C558/C458/C368/C308/C258
Step
4 If there is looseness in the screw of the ADF hinge part, fix it and perform the installation settings of ADF.
DF-629
5 Perform test printing/scanning to check whether the problem has been resolved.
If it can not be resolved, confirm "(2) individual adjustment items".
(2) Individual adjustment items
Skewed image
Image deviation
NOTE
▪ If the trouble can not be solved by the above adjustment, replace the CCD unit.
(CCDB) (C658/C558/C458)
▪ When using DF-704 (dual scan document feeder), if there is a problem only on the back side image after the above adjustment,
replace the CIS module.
< Scanner (IR) >
(1) First steps of troubleshooting
Step
1 Check the set position of original, and correct it if needed.
2 When using a thick original (like a book), check whether the user strongly presses the document cover/ADF. *The
scanner section may not move smoothly due to the excessive pressure, and which may cause image deviation.
3 If original glass is not installed properly, reinstall original glass.
4 Perform test printing/scanning to check whether the problem has been resolved.
If it can not be resolved, confirm "(2) individual adjustment items".
(2) Individual adjustment items
Skewed image
Image deviation
NOTE
If the trouble can not be solved by the above adjustment, replace the CCD unit.
(C658/C558/C458)
< Paper feed tray >
(1) First steps of troubleshooting
Step
1 Correct the paper settings, if the paper size/type in the tray and the paper settings selected on the machine are not
matched.
2 Check the set position of paper or paper length guide / paper width guide, and correct it if needed.
*For a paper tray that uses only a specific paper size, it is possible to fix the paper width guide to a specific paper size
position by attaching a screw to the screw hole on the paper width guide (back side). It is possible to prevent problems
due to wrong paper setting, but be careful as users will not be able to change paper sizes by themselves.
3 Check the paper path and the back side of the tray, and remove any paper pieces or foreign matters.
4 Check each roller for dirt and wear, and clean or replace it if needed.
5 Perform test printing to check whether the problem has been resolved.
If it can not be resolved, confirm "(2) individual adjustment items".
(2) Individual adjustment items
Skewed image
Image deviation
NOTE
* If the trouble can not be solved by the above adjustment, check the Paper transport section.
< Paper transport section >
(1) First steps of troubleshooting
, Mount DF-704)
1. ADF adjusting the height
Adjusting the height
Adjusting the height (DF-629)
Adjusting the height (DF-704)
2. Skew Measurement
3. Registration Loop Adj.
(Perform this item only if the problem is not resolved by adjustment 1 and 2.)
1. Feed Zoom
2. FD-Mag. Adj. (B)
3. Auto Stop Position Adjustment
(Before performing this adjustment, adjustment 1 and 2 needs to be completed.)
CIS module (CIS) (dual scan document feeder)
Mechanical adjustment: Print Head Skew Adj.
Scan Area
Printer Reg. Loop Adj.
Printer Area * If the image deviation in the main scan direction (side edge) can not be adjusted completely,
perform the mechanical adjustment on below for the affected tray.
Mechanical adjustment: Centering adjustment of the tray 1/2
C258)/Centering adjustment of the tray 1/2
Mechanical adjustment: Paper reference position
position (PC-115/CP-215)/Paper reference position
K TROUBLESHOOTING > 16. IMAGE QUALITY PROBLEM
Content
CCD board (CCDB)
Content
(C658/C558/C458)
CCD board (CCDB)
Content
Centering adjustment of the tray 1/2
(C658/C558/C458)
Paper reference position (PC-100/PC-210)/Paper reference
(PC-410/PC-415)
K-303
(Mount
(C368/C308/C258) /
(C368/C308/C258) / CCD board (CCDB)
(C368/C308/
CCD board