HP Designjet Z3100 Photo Printer series - Manual (Page 190)

CAUTION: This is a delicate process and may damage the printhead. Do not touch the electrical
connections on the backside of the printhead.
First, remove the printhead, see Remove a printhead on page 122 , 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.
180 Chapter 14 Troubleshooting ink cartridge and printhead issues ENWW
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