Ink Jet Print Heads; Replacing The Print Head - NEC SuperScript 750C User Manual

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Ink Jet Print Heads

Your printer is a full-color printer. It must be equipped with
both its monochrome and color print heads in order to
operate correctly.
The print heads with replaceable ink cartridges supplied
with the printer have an outer casing, with the nozzles and
the electrical contacts, and an ink cartridge which fits inside
the outer casing. This economical and ecological system
allows you to change the cartridge several times before you
have to change the entire print head. This type of print head
generates an "end of ink" condition when the ink runs out,
causing printing to stop, the light indicators to flash
alternately and an error message to be displayed on your
PC screen.
The printer also supports a Photo Cartridge : an all-in-one
print head and ink cartridge which you can use with the
specific driver supplied to print photographic images.
ALWAYS use manufacturer-original Ink Jet Print Heads
and Cartridges.
This section describes:
how to replace the print heads and the ink cartridges,
how to clean the print head,
how to preserve optimum print quality.
18

Replacing the Print Head

See figures 1d and 2d on page V, for the monochrome
print head and 1e and 2e on the same page for the color
print head/Photo Cartridge, and the indications on the
template on the inside of the cover.
You should remove the print head from the printer only to
replace it or to repeat its insertion (see Inserting the Print
Head in the Quick Start), in the case of faulty printing.
When replacing the print head, take care not to touch the
print head carriage shaft nor the area under the print
head carriage.
Any document inserted for printing will be expelled if
you remove the color print head.
To remove the print head, proceed as follows:
1. Open the printer cover;
(a) print head with replaceable ink cartridge only:
if you are changing the print head due to an "end of ink"
condition signaled by the printer (printing stopped, both
ON LINE and POWER light indicators on the printer
operator panel flashing alternately, and an error
message on your PC screen), the print head carriage
will move automatically to the head loading/ replacement
position of the print head which caused the error signal.
(b) all types of print heads:
if you are changing the print head due to deteriorated
print quality which has NOT been signaled by the printer
( you pressed ON LINE to interrupt printing BEFORE
opening the cover ), the print head carriage will move to
the monochrome print head loading/replacement
Ink Jet Print Heads - Replacing the Print Head

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