HP Designjet 9000s Printer series - Manual (Page 29)

Turn on the heater
▲ Turn on the heater by pressing the power switch on the right rear of the printer.
1. Heater switch
NOTE Use the heater switch on the right rear of the printer only when turning the printer off
completely for removal, installation, or servicing.
Turn the power off
Turn off the printer
WARNING! The printer has an internal clock which allows it to wash the printheads
automatically, flushing some ink through the printhead, which keeps the printheads in good
condition. This is done after the first 20 hours without printing and every 3 days. If the printer is
switched off for a long period, this process does not happen. If the ink does not flow through
the printheads from time to time, the ink will dry inside the nozzles, reaching a point where it is
impossible to recover them and the printhead will fail. This will mean an expensive printhead
replacement.
Automatic maintenance and cleaning will not be performed even if you turn off the printer at
the front panel. The printer power switch on the rear of the printer should be used only when
the printer is turned off to move it, to connect it to a computer, or to install or maintain printer
parts.
CAUTION If you need to leave the printer unattended for any reason, ensure that the printer
is on, the ink cartridges are full, and the waste ink bottle is empty, so that automatic
maintenance (performed after the first 20 hours without printing and every 3 days) can be
completed successfully for the time you are not present. If needed, install new ink cartridges.
The ink cartridges that you replace can be reused when you return to your printer, if they still
contain ink.
ENWW Turn the power on/off 19
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