October 2012
3-23
ColorQube 8570/8870 Service Manual
IQ16, IQ17
Image Quality
Xerox Internal Use Only - Revised, 3rd Revision
IQ16 Repeating Print Defects
Repeating defects typically result from debris or damage to an imaging component. The inter-
val between the defect can reveal the affected component.
Figure 1 Repeating Print Defects
Initial Actions
1. Check that supported media is being used.
2. Print several test prints as a sample.
3. Measure the interval between defects and note their position.
Troubleshooting Reference
Applicable Parts (Chapter 5 - Parts List)
• Drum Assembly, PL 2.1 Item 4
• Transfix Roller, PL 2.1 Item 14
Procedure
Repeating defects that occur every 11.6 cm (4.58 in.) are caused by the Transfix Roller. Clean
or replace the Transfix Roller (REP 2.13) as needed.
Does the error persist?
YN
Troubleshooting complete.
A repeating defect that has a different Y position on each page, but has the same X position
indicates a defect on the Drum. Clean the Drum.
Does the error persist?
YN
Troubleshooting complete.
Replace the Drum Assembly (REP 2.4).
IQ17 White Stripes (Pinstripes)
White striping appears as a series of evenly-spaced pinstripes approximately 0.7 mm (0.03 in.)
apart. This indicates a malfunction in the X-Axis Drive. This can cause vertical lines to be wavy.
Initial Actions
1. Check that supported media is being used.
2. Print the Light Stripes Test print (Control Panel Menu -> Troubleshooting -> Print
Quality Problems -> Eliminate Light Stripes -> Light Stripes Test).
3. Print several solid-fill test prints as a sample.
Troubleshooting Reference
Applicable Part (Chapter 5 - Parts List)
• Preheater and Deskew Assembly, PL 2.1 Item 20
• Lower Inner Duplex Guide, PL 3.1 Item 2
• Upper Duplex Guide with Solenoid, PL 3.1 Item 5
• X-Axis Motor, PL 4.1 Item 11
Figure 1 White Stripes (Pinstripes)
Figure 2 White Stripes
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