MUTOH XPJ-461UF Operation Manual page 22

Agitate the ink cartridges
Before installing a new ink cartridge, invert the ink cartridge back and forth to agitate ink. Periodical ink agitation is also required
when prompted on the operation panel.
Otherwise, the ink inside the cartridges settles or coagulates and may cause poor print quality or a malfunction.
Please use this product at least once a week
If the printer is not used for a long time, the print head nozzles can get clogged causing damage to the printer.
Conduct periodic maintenance
This product requires daily maintenance.
• Perform the Nozzle check before and after printing.
If nozzle clog is found, conduct a head cleaning.
• Make sure to perform daily maintenance after you finish printing for the day.
Failure to perform daily maintenance may affect print quality or result in damage to the printer.
"Daily Maintenance" P. 114
• If you are not using the printer for an extended period*, put it into sleep mode and then perform followings.
*"Extended period" means one to four weeks.
• Agitate the ink cartridges.
• Check the ink level and replace the relevant ink cartridge if "Ink Low" is displayed.
If you may not be able to perform above, follow the instructions of
power off the printer.
• Empty the waste ink tank when needed.
• Clean the interior of the printer once a month.
Some parts need to be replaced periodically
In this product, following parts need to be replaced after a long-term use.
• Parts required to be replaced by users: Absorption material for the flushing box, Cleaning wiper, UV-LED lamp filter, UV-LED
lamp emitting window glass.
• Parts required to be replaced by service personnel: Various motors, Pumps, Print head, Head cap unit, UV-LED lamp
22 Precautions when using this product
"If not using the printer for a long time" P. 25
and