Konica-Minolta bizhub C257i

Skewed image/Image deviation

Troubleshooting steps for each cause area

NOTE
▪ If the problem can not be solved after "(1) First steps of troubleshooting," check "(2) Individual adjustment items".
▪ In "(2) Individual adjustment item," perform adjustment and test according to the manual description procedure of each item.

ADF

(1) First steps of troubleshooting

1. Check the set position of original and document width guide, and correct it if needed.
2. Check the paper path, and remove any paper pieces or foreign matters.
3. Check each roller for dirt and wear, and clean or replace it if needed.
4. If there is looseness in the screw of the ADF hinge part, fix it and perform the installation settings of ADF.
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
  1. ADF adjusting the height
  ADF adjusting the height
  2. Skew Measurement
  3. Registration Loop Adj. (Perform this item only if the problem is not resolved by adjustment 1 and 2.)
• Image deviation
  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.)

NOTE
▪ If the trouble can not be solved by the above adjustment, replace the CCD unit.
▪ 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

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

Image deviation: Scanner Area

NOTE: If the trouble can not be solved by the above adjustment, replace the CCD unit.

Paper feed tray

(1) First steps of troubleshooting

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
  Printer Reg. Loop Adj.
• Image deviation 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
  Mechanical adjustment: Paper reference position

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

1. 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.
2. If the Right door unit / Regist unit (inner door on the vertical transport section) is half-open, make it correct position.
3. Check the paper path, transport rollers, and registration section, and remove any paper pieces / foreign matters / paper dust.
4. 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: Printer Reg. Loop Adj.

NOTE: If the trouble can not be solved by the above adjustment, reinstall the Right door unit / Regist unit.