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Phaser 8400/8500/8550/8560 Color Printer Service Manual 5-3
Print-Quality Troubleshooting
Random Light Stripes
One or more color bars are missing on the test page. This is likely caused by
a weak or clogged Printhead jet.
Initial Actions
■ Run the Eliminate Light Stripes routine from the Control Panel.
■ Check the exit path for debris or contamination.
Troubleshooting Reference
Applicable Parts Example Print
■ Printhead
■ Drum Maintenenace Kit
■ Stripper Carriage
Random Light Stripes Troubleshooting Procedure
Step Questions and Actions
Yes No
1 On the Control Panel, select the Eliminate
Light Stripes function and follow the
procedure on the printed pages. For 8400
printers, this step does not include Jet
Substitution.
Did this correct the problem?
Complete. Go to Step 2.
2 It may be necessary to repeat Step 1
up to 3 times if the stripes still appear.
NOTE If there are discolored jets, print the
solid fill test print in the color with the
discolored jets. In the following
example, the yellow stripe has
discolored jets, therefore you would
print the yellow solid fill. For
instructions on printing solid fill test
prints, see “Black, Red, Green, Blue,
Cyan, Magenta, and Yellow Solid
Fills” on page 5-42.
Discolored jets usually clear after two
or three prints, using the problem jets.
3 Clean the exit path and Stripper Blade with a
lint-free cloth.
Did this correct the problem?
Complete. Go to Step 4.
Light Stripes Test