HP Designjet Z3100 Photo Printer series - Manual (Page 156)

First, remove the printhead (see Remove a printhead on page 88 ) and then use a cotton swab and a
little de-ionized or distilled water to clean the bottom of the printhead until the residue is removed.
Clean the printhead drop detector
The printhead drop detector is a sensor that detects which nozzles on the printheads are not printing in
order to substitute them for good printing nozzles. If particles, such as fibers, hair, or paper pieces, block
the sensor print quality is affected.
When the front panel displays a warning message that the clean process is needed, you are
recommended to clean the printhead drop detector. If you do not clean the printhead drop detector
immediately, the printer continues working normally, however, the front panel display continues to show
the warning.
CAUTION Wear gloves to avoid getting ink on your hands.
1. Turn off the printer at the front panel.
146 Chapter 13 Troubleshooting ink cartridge and printhead issues ENWW
Troubleshooting ink
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