Konica Minolta bizhub C658 Service Manual page 1629

bizhub C658/C558/C458/C368/C308/C258
HDD Check
Compress/Decompression
Check
Memory Bus Check:
Output image
16.3 Corrective action procedure (bizhub C658/C558/C458/C368/C308/C258)
16.3.1 Image trouble sample illustrations
NOTE
▪ Sample illustrations schematically show exemplary image troubles that occur when the images are printed on A3-size paper.
▪ The arrow in the exemplary image troubles indicates the paper feeding direction.
Skewed image/Image deviation
Color line 2, Color band 2
Gradation reproduction failure
Void area
Back marking
Uneven gloss, Rough gloss
Image bleeding
ACS malfunction
Broken HDD cable, damaged HDD, faulty MFP board
Faulty MFP board, improperly connected dual scan image
processing board
Improperly connected MFP board, faulty MFP board
White line 1, White band 1
Uneven density 1
Color reproducibility error
White spot
Blank copy
Poor fusing performance
Blurred fine lines
Abnormal image
K TROUBLESHOOTING > 16. IMAGE QUALITY PROBLEM
Replace the HDD cable, replace the HDD,
replace the MFP board
Reinstall the dual scan image processing board,
replace the dual scan image processing board,
replace the MFP board
Replace the MFP board
Color line 1, Color band 1
Uneven density 2
Incorrect color image registration
Color spot
Black copy
Offset
Moire
K-301
White line 2, White band 2
Faint image, Low image density
Foggy background
Blurred image
Uneven pitch
Brush effect
Distorted image