09/2007
3-9
Phaser 8860/8860MFP Service Manual
IQ12, IQ13
Image Quality
Initial Issue
IQ12 Fuzzy Text or Image
This RAP addresses image quality problems associated with the DADF.
Initial Actions
1.
Check that supported media is being used.
2.
Reseat all cable connections between the Scanner Assembly and the Electronics Module.
3.
Cycle power to the system.
Procedure
IQ13 Random Light Stripes
This RAP addresses image quality problems associated with the Print Engine. Random light
stripes typically result from an obstructed Printhead jet. Most jet obstructions are caused by
paper fibers or air bubbles. Indications of a random light stripe condition are one or more color
bars missing on the test page, or output that appears as follows:
Figure 1 Random Light Stripes
NOTE:
If there are discolored jets, as shown in
Figure 2
, print several solid fill test prints in the
affected color. In the following example, the center yellow stripe has discolored jets, therefore
you would print the yellow solid fill.
Figure 2 Discolored Jets on the Light Stripes Page
Table 1 IQ12 Fuzzy Text or Image
Step Questions and Actions
Yes
No
1
Print the Graphics Demo page for fuzzy
image or the Configuration page for fuzzy
text.
Does the text appear fuzzy?
The problem is
with the Print
Engine. See
IQ22
.
Go to Step 2.
2
Make a copy of the page printed in Step 1.
Does the image still appear fuzzy?
Go to Step 3.
Go to Step 4.
3
Check and/or adjust the Control Panel copy
settings.
Print the Troubleshooting Print Quality page
and evaluate the Output Quality and Color
Settings section. Use Text or Mixed print
mode to evaluate text. Graphics lose image
quality in these two modes. If the system is
set to Photo or Graphics mode, text quality
decreases.
Does the problem persist after making the
adjustments?
Go to Step 4.
Complete.
4
Perform the DADF to Scanner Calibration
adjustment procedure (
ADJ 1.15.1
).
Does the problem persist?
Go to Step 5.
Complete.
5
Scan a copy of the page printed in Step 2.
Does the problem persist?
Replace the Scan-
ner Assembly
(
REP 1.0.11
).
Replace the DADF
(
REP 1.0.15
).
Summary of Contents for Phaser 8860
Page 1: ...705P01205 September 2007 Phaser 8860 8860MFP Service Documentation...
Page 4: ...09 2007 iv Phaser 8860 8860MFP Service Manual Initial Issue Introduction...
Page 28: ...09 2007 1 2 Phaser 8860 8860MFP Service Manual Initial Issue Service Call Procedures...
Page 34: ...09 2007 2 2 Phaser 8860 8860MFP Service Manual Initial Issue Error Messages and Codes...
Page 94: ...09 2007 3 2 Phaser 8860 8860MFP Service Manual Initial Issue Image Quality...
Page 126: ...09 2007 4 2 Phaser 8860 8860MFP Service Manual Initial Issue Repairs and Adjustments...
Page 208: ...09 2007 5 2 Phaser 8860 8860MFP Service Manual Initial Issue Parts List...
Page 222: ...09 2007 6 2 Phaser 8860 8860MFP Service Manual Initial Issue Diagnostics...
Page 274: ...09 2007 7 2 Phaser 8860 8860MFP Service Manual Initial Issue Wiring Data...
Page 294: ...09 2007 8 2 Phaser 8860 8860MFP Service Manual Initial Issue Theory of Operation...
