October 2012
3-8
ColorQube 8570/8870 Service Manual
IQ3, IQ4
Revised, 3rd Revision - Xerox Internal Use Only
Image Quality
Check the Paper Guides for nicks, cuts, or debris. Are the Guides damaged?
YN
Clean all parts in the paper path.
Replace the Paper Guides:
• Inner Simplex Guide with Predeskew Sensor and Harness (REP 3.1)
• Lower Inner Duplex Guide (REP 3.2)
• Lower Exit Guide Assembly w/Strip Flag (REP 3.3)
If the mark shows as vertical line with dull or low gloss surface, replace the Drum Wiper Blade
Assembly (REP 2.17).
Does the error persist?
YN
Troubleshooting complete.
Replace the Drum Maintenance Camshaft (REP 2.11) and Process Drive (REP 4.13). Does
the error persist?
YN
Troubleshooting complete.
Perform extra purge procedure (Control Panel Menu -> Troubleshooting -> Print Quality
Problems -> Eliminate Light Stripes -> Light Stripes Test).
Does the error persist?
YN
Troubleshooting complete.
Check the Wave Amp and cables.
Release the end of the cable and carefully examine the conductor ends (a magnifier helps) to
see that they are not cracked or torn. If the cable looks good, carefully reinstall it using a ZIF
tool (refer to REP 2.3 for how to use the ZIF tool for unlocking/locking the ZIF cable connector).
NOTE: Failure to properly unlock the connector will damage the cable.
Are the cables secured?
YN
Reconnect the cables.
Replace the Printhead Assembly (REP 2.3).
IQ4 Streaks, Smudges, or Smears Down the Print
Smudges or smears typically result from ink residue in the paper path. Residue can collect on
the rollers, paper guide ribs, or inside the Preheater. Smudges or smears.
Figure 1 Streaks, Smudges, or Smears
Figure 2 Smudges or Smears
A
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