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5-12 Phaser 8400/8500/8550/8560 Color Printer Service Manual
Print-Quality Troubleshooting
4 If there are streaks on the front side only of
a 2-sided print, the Preheater may be
scraping ink off the print.
1. Look for ink shavings along the streaks
on the printed paper.
2. Clean the Preheater using the Remove
Print Smears routine.
Did this correct the problem?
Complete. Go to Step 5.
5 Check for weak or missing jets. Print the
weak/missing jet test print, see
“Weak/
Missing Jet” on page 5-34.
Did this correct the problem?
Complete. Go to Step 6.
6 Check for discolored jets. Print the solid fill
test print, see
“Black, Red, Green, Blue,
Cyan, Magenta, and Yellow Solid Fills” on
page 5-42.
Did this correct the problem?
Complete. Go to Step 7.
7 Check X-Axis drive motion.
If the X-Axis drive does not move the
Printhead smoothly and evenly during
printing, vertical lines appear on the print.
See
“White Stripes (Pinstripes)” on
page 5-30.
Did this correct the problem?
Complete. Go to Step 8.
8 Check the Preheater’s temperature.
Smears on a duplex print can be caused by
the preheater operating at a temperature
that is too high or debris is in the Duplex
Roller or duplex guides.
Run the Service Diagnostics Duplex Path
test.
Is the operating temperature within the
correct value range?
Replace the
Preheater.
Replace the
Electronics
Module.
Streaks or Lines Down the Print Troubleshooting Procedure (Continued)
Step Questions and Actions
Yes No