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Phaser 84000/8500/8550/8560 Color Printer Service Manual 6-13
Adjustments and Calibrations
To correct print-quality problems, refer to the Eliminate Light Stripes test page
to determine which jets are weak or missing.
1. Select Jet Substitution Mode, and then press the OK button.
2. Select Jet Select, and then press the OK button.
3. Scroll to the color for the weak or missing jet, and then press OK to select
the color.
4. Use the Up Arrow and Down Arrow buttons to select the number of the
weak or missing jet, and then press OK to confirm the selection.
5. Select Save Change and Exit, and then press OK to complete the
procedure.
6. After substituting a jet, print the Light Stripes Test page to verify the
problem has been solved.
At the bottom of the page, a Service Mode key summarizes the number of
substituted jets for each color.
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The Configuration and Printer Status pages also list jets in Service Mode
(substituted).
Enabling Jet Substitution Mode (8500/8550/8560)
To select Jet Substitution Mode for 8500/8550/8560 models:
1. Select Troubleshooting, and then press the OK button.
2. Select Print Quality Problems, and then press the OK button.
3. Select Eliminate Light Stripes, and then press the OK button.
4. Select Jet Substitution Mode, and then press the OK button.
5. Follow the prompts to select the color and malfunctioning jet number
indicated on the Light Stripes Test page.
Disabling Jet Substitution Mode (8400)
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Turn Jet Substitution Mode Off will only become available if Jet
Substitution Mode has been turned on. If the option to turn off is not
available then Jet Substitution Mode is not turned on.
After the Printhead is replaced, disable Jet Substitution Mode to restore
normal operation. Using the hidden Jet Substitution Mode Menu, select Jet
Select.
1. Select Troubleshooting, and then press the OK button.
2. Select Print Quality Problems, and then press the OK button.
3. Press and hold the Up Arrow button, and then press the Back button.
4. Select Jet Substitution Mode, and then press the OK button.
5. Select Jet Select, and then press the OK button.
6. Select Turn Jet Substitution Mode Off, and then press the OK button.
7. Select Print the Eliminate Light Stripes to print the test page and verify
that Service Mode is disabled for all jets.