Maintenance; Printhead; How To Change Ink Filters - Oce Arizona 550 GT User Manual

How to Change Ink Filters

How to Change Ink Filters
Introduction
Each ink color has a filter that removes any particulate matter from the ink as it is pumped
from the ink bag toward the printheads. The ink filters are located to the right of the AC
power switch at the electronics end of the printer around the corner from the ink bags.
When to do
The ink filter for each color of ink must be replaced at least every 12 months or after 11
bags (22 liters) of ink have been consumed. If an ink filter becomes clogged, it will trap
color pigment and affect the color balance of printed images. It can also cause damage to
the ink system. It is important to change the filter before this occurs.
If the Nozzle Check print shows one color weaker than normal, this is an indication that
the ink filter for the affected color is clogged and the filter must be replaced. Also, If you
notice that an ink reservoir takes a long time to fill, check your records for when the filter
for that color of ink was last changed. Make sure that the ink tubing from that filter is
not kinked.
Note:
New ink filters will contain air that must be released. Air in the ink filter can affect the
vacuum and result in dripping ink and deteriorated image quality as a result of nozzle
dropout. Bleeding the ink filters is a strategy to avoid persistent nozzle dropout. You
must bleed any trapped air out of the ink filters to prevent an overflow of ink into the
0.2 micron ink purge filters associated with the purge valves located on the top of the
carriage. If any of the 0.2-micron purge filters shows signs of ink contamination you
will need to place a service call to have them replaced. However, the preferred preventative
maintenance method is to bleed the ink filters on a regular basis.
Before you begin
IMPORTANT! Open the sliding maintenance station door to disable the ink pumps.
Close all of the purge valves on the top of the carriage.
Required tool
• Philips screwdriver (only if enclosure thumb-screws are too tight)
• Lint-free cloth
246 Chapter 12 - Printer Maintenance
User Manual: Arizona 550 GT - Version 1.2, Revision B - 2012