HP Officejet Pro 8500 User Manual

When the quality of printouts deteriorates, follow the steps below:
1.Check the health of the printheads. For more information, see 
To check printhead
health .
2. Print the print quality diagnostic page on a clean sheet of white paper. Evaluate
any problem areas, and perform the recommended actions. For more information,
see 
To print the print quality diagnostic page.
3. Clean the printheads. For more information, see 
To clean the printheads .
4. Replace the printheads if the problems persist after...

•Control panel:  PressSetup, select  Print Report, select  Print Quality Page, and
then press  OK.
• Embedded Web server:  Click the Settings tab, click  Device Services  in the left
pane, select  Print a PQ (Print Quality) Diagnostic Page  from the drop-down list
in the  Print Quality  section, and then click  Run Diagnostic.
• Toolbox (Windows):  Click the Services tab, and then click  Print a PQ (Print
Quality) Diagnostic Page  and follow the onscreen instructions.
• HP Printer Utility (Mac OS X):...

1Printer Information: Shows device information (such as the product model number, serial
number, and firmware version number), the number of pages printed from the trays and
duplexer, the ink level information, and the printhead health status.
NOTE: Ink level warnings and indicators provide estimates for planning purposes only.
When you receive a low-ink warning message, consider having a replacement cartridge
available to avoid possible printing delays. You do not need to replace cartridges until...

To clean the printheads
NOTE:Cleaning uses ink, so clean the printheads only when necessary.
The cleaning process takes a few minutes. Some noise might be generated in the
process.
Before cleaning the printheads, make sure you load paper. For more information,
see 
Load media .
•Control panel:  PressSetup, select  Tools, and then select  Clean Printhead.
• Embedded Web server:  Click the Device Settings  tab, click Device Services  in
the left pane, select  Clean Printheads from the drop-down list in the...

4.Lift the handle of the printhead (which corresponds to the control-panel message)
and use it to pull the printhead out of its slot.
5.Obtain clean, dry, soft and lint-free cleaning material. Suitable materials include
paper coffee filters and eyeglass lens cleaning paper.
CAUTION: Do not use water.
6.Wipe the electrical contacts on the printhead but do not touch the nozzles.
NOTE: The electrical contacts are small copper-color squares, grouped on
one face of the printhead.
The nozzles are on a...

8.Clean the electrical contacts in the printhead slot inside the device with a clean,
dry, soft and lint-free cloth.
9.Plug in the power cord and turn on  the device. The control panel should indicate
that the printhead is missing.
10. Insert the printhead into its color-coded slot (the label on the printhead must match
the label on the printhead latch). Press down firmly on the printhead to ensure
proper contact.
11. Where necessary, repeat the steps for the remaining printheads.
12. Pull the printhead...

3.Lift the printhead latch.
4.Lift the handle of a printhead and use it to pull the printhead out of its slot.
5.Before installing a printhead, shake the printhead up and down at least six times
while the printhead is still in its packaging.
Maintain the printheads 183
 

6.Remove the new printhead from its package, and then remove its orange
protective caps.
CAUTION: Do not shake printheads after the caps are removed.
7.Insert the printhead into its color-coded slot (the label on the printhead must match
the label on the printhead latch). Press down firmly on the printhead to ensure
proper contact.
8. Pull the printhead latch all the way forward, and then press down to ensure that
the latch is properly engaged. You might have to apply some pressure to engage
the latch....

Dust or dirt on the scanner glass, scanner lid backing, or scanner frame can slow
down performance, degrade the quality of scans, and affect the accuracy of special
features such as fitting copies to a certain page size.
This section contains the following topics:
•
Clean the scanner glass
•
Clean the exterior
•
Clean the automatic document feeder
Clean the scanner glass
To clean the scanner glass
1. Turn off the device.
2. Lift the scanner lid.
3. Clean the glass by using a soft, lint-free cloth that...

Clean the automatic document feeder
If the automatic document feeder picks up multiple pages or if it does not pick up plain
paper, you can clean the rollers and separator pad. Lift the automatic document feeder
cover to access the pick assembly inside the automatic document feeder, clean the
rollers or separator pad, and then close the cover.
To clean the rollers or separator pad
1.Remove all originals from the document feeder tray.
2. Lift the automatic document feeder cover (1).
This provides easy...