22 Troubleshooting scan-quality issues ......................................................................................................... 197
Random vertical lines ........................................................................................................................................ 198
Wrinkles or folds ................................................................................................................................................ 198
Line discontinuities ............................................................................................................................................ 199
Grain in area fills when scanning plain paper ................................................................................................... 200
Small color differences between adjacent CIS modules .................................................................................. 201
Vertical light lines at the intersection between CIS modules ........................................................................... 202
Variable line thickness or missing lines ............................................................................................................ 203
Inaccurately reproduced colors ........................................................................................................................ 203
Color fringing ..................................................................................................................................................... 204
Clipping in dark or light areas ........................................................................................................................... 204
Flare in the image when scanning glossy originals .......................................................................................... 206
Vertical red and green bands over white or black background ........................................................................ 206
The stop-start effect ......................................................................................................................................... 206
Vibration ............................................................................................................................................................ 207
Horizontal periodical banding ........................................................................................................................... 208
Defocus, blurring and fading colors .................................................................................................................. 208
Incorrect paper advance, skew during scanning, or horizontal wrinkles ........................................................ 210
Vertical black band 20 cm wide ......................................................................................................................... 211
The scanner damages some originals .............................................................................................................. 212
Completely wrong colors .................................................................................................................................. 212
Vertical distortion .............................................................................................................................................. 213
Object replication (ghosting) ............................................................................................................................. 213
Clipping or incorrect scale factor when down-scaling in copies and prints ..................................................... 214
Incorrect edge detection, mostly when scanning tracing paper ...................................................................... 214
A copied or scanned image is very skewed ....................................................................................................... 215
23 The scanner diagnostic plot ...................................................................................................................... 216
Prepare the printer and the paper to print the diagnostic sheet ..................................................................... 217
Visual check for errors while printing the diagnostic sheet ............................................................................. 217
Scan or copy the diagnostic plot ....................................................................................................................... 220
Monitor calibration ............................................................................................................................................ 221
Save the diagnostic plot for future use ............................................................................................................ 221
24 Troubleshooting ink cartridge and printhead issues ................................................................................... 222
Cannot insert an ink cartridge ........................................................................................................................... 223
Ink cartridge status messages .......................................................................................................................... 223
Cannot insert the printhead .............................................................................................................................. 223
The front-panel display recommends reseating or replacing the printhead .................................................. 223
Clean the printhead ........................................................................................................................................... 224
Align the printhead ............................................................................................................................................ 224
Printhead status messages ............................................................................................................................... 225
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