Konica Minolta bizhub C450 Service Manual page 35

18.2 How to identify problematic part ....................................................................... 377
18.2.1 Initial Check Items .................................................................................... 377
18.3 Solution ............................................................................................................ 379
18.3.1 IR System: white lines in Sub Scan Direction, white bands in Sub Scan
Direction, colored lines in Sub Scan Direction, and colored bands in Sub
Scan Direction .......................................................................................... 379
18.3.2 Scanner System: white lines in Main Scan Direction, white bands in Main
Scan Direction, colored lines in Main Scan Direction, and colored bands in
Main Scan Direction.................................................................................. 380
18.3.3 Scanner System: color spots .................................................................... 381
18.3.4 Scanner System: fog ................................................................................ 382
18.3.5 Scanner System: blurred image, blotchy image........................................ 383
18.3.6 Scanner System: incorrect color image registration, sync shift (lines in main
scan direction) .......................................................................................... 384
18.3.7 Scanner System: moire ............................................................................ 385
18.3.8 Scanner System: skewed image............................................................... 386
18.3.9 Scanner System: distorted image............................................................. 387
18.3.10 Scanner System: low image density, rough image ................................... 388
18.3.11 Scanner System: defective ACS ............................................................... 389
18.3.12 Scanner System: blank copy, black copy .................................................. 390
18.3.13 Scanner System: abnormal image............................................................ 391
18.3.14 Printer Monocolor: white lines in Sub Scan Direction, white bands in Sub
Scan Direction, colored lines colored bands in Sub Scan Direction, white
lines in Main Scan Direction, white bands in Main Scan Direction, colored
lines in Main Scan Direction, colored bands in Main Scan Direction........ 392
18.3.15 Printer Monocolor: uneven density in sub scan direction ......................... 393
18.3.16 Printer Monocolor: uneven density in main scan direction ....................... 394
18.3.17 Printer Monocolor: low image density....................................................... 395
18.3.18 Printer Monocolor: gradation reproduction failure..................................... 397
18.3.19 Printer Monocolor: foggy background ....................................................... 399
18.3.20 Printer Monocolor: void areas, white spots............................................... 401
18.3.21 Printer Monocolor: colored spots .............................................................. 402
18.3.22 Printer Monocolor: blurred image ............................................................. 403
18.3.23 Printer Monocolor: blank copy, black copy ................................................ 404
18.3.24 Printer Monocolor: 0.5-mm-pitch uneven image ....................................... 405
18.3.25 Printer Monocolor: 2-mm-pitch uneven image .......................................... 406
18.3.26 Printer Monocolor: 94-mm-pitch uneven image........................................ 407
18.3.27 Printer 4-Color: white lines in sub scan direction, white bands in sub scan
direction, colored lines in sub scan direction, and colored bands in sub scan
direction .................................................................................................... 408
xiv
Field Service Ver. 1.0 Mar. 2005