October 2012
3-1
ColorQube 8570/8870 Service Manual
Image Quality
Xerox Internal Use Only - Revised, 3rd Revision
3 Image Quality
Print-Quality Problems Overview .................................................................................... 3-3
Image Quality RAPs
IQ1 Image Quality Entry RAP ......................................................................................... 3-5
IQ2 Random Light Stripes............................................................................................... 3-5
IQ3 Predominant Light Stripes, Scratches or Marks Down the Print or Parallel to the Long Axis
of Printing........................................................................................................................ 3-7
IQ4 Streaks, Smudges, or Smears Down the Print......................................................... 3-8
IQ5 Partial Image/ Color Missing .................................................................................... 3-10
IQ6 The Printed Image is Too Light or Too Dark ............................................................ 3-11
IQ7 No Image is Printed.................................................................................................. 3-12
IQ8 Color is Uneven or Wrong (Uniformity) .................................................................... 3-13
IQ9 Skew......................................................................................................................... 3-14
IQ10 Ink on White Portion of the Printed Page ............................................................... 3-15
IQ11 Fuzzy or Blurry Printing .......................................................................................... 3-17
IQ12 Vertical Lines Appear Wavy ................................................................................... 3-18
IQ13 Ghosting................................................................................................................. 3-19
IQ14 Oil on Print.............................................................................................................. 3-20
IQ15 Incomplete Image Transfer, Drop Out, Loss of Image Pixels................................. 3-21
IQ16 Repeating Print Defects ......................................................................................... 3-23
IQ17 White Stripes (Pinstripes)....................................................................................... 3-23
IQ18 Media Wrinkling or Damage................................................................................... 3-25
IQ19 Image is Offset or Cutoff ........................................................................................ 3-26
IQ20 Poor Ink Adhesion, Poor Image Durability ............................................................. 3-27
IQ21 Gloss Irregularities ................................................................................................. 3-28
IQ22 Grainy.....................................................................................................................3-29
Internal Test Prints
Test Prints....................................................................................................................... 3-31
Weak or Missing Jet........................................................................................................ 3-31
Cleaning Page (Mud Page) & Light Stripes .................................................................... 3-31
Color Bands, RGBK Dither.............................................................................................. 3-32
Manufacturing Skew Margin............................................................................................ 3-33
YMCKRGB Solid Fills...................................................................................................... 3-33
Cyan Solid Fills ............................................................................................................... 3-34
Magenta Solid Fills.......................................................................................................... 3-34
Yellow Solid Fills ............................................................................................................. 3-35
Black Solid Fills...............................................................................................................3-35
Red Solid Fills .................................................................................................................3-36
Green Solid Fills.............................................................................................................. 3-36
Blue Solid Fills................................................................................................................. 3-36
Manufacturing Skew and Margins................................................................................... 3-37
Chase Pages................................................................................................................... 3-37
Oil Bar Chase.................................................................................................................. 3-38
Purge Efficiency .............................................................................................................. 3-38
X-Axis Motion.................................................................................................................. 3-38
Drop Mass Calibration..................................................................................................... 3-38
Head Roll ........................................................................................................................ 3-39
Intensity CMYK................................................................................................................ 3-39
Solid Fill Red Scan.......................................................................................................... 3-40
Solid Fill Green Scan....................................................................................................... 3-40
Solid Fill Blue Scan ......................................................................................................... 3-40
Jet Substitution Mode...................................................................................................... 3-41
Image Specifications....................................................................................................... 3-42
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