HP 72SI User Manual download pdf (Page 55)

Checking Jet Health 3-7

Checking Jet Health The printer’s automatic jet maintenance features (gutter print-

ing, spits, service station wipes) are designed to keep the inkjets

from clogging. In addition, when AutoJet detects a missing jet, it

attempts to replace it with a working jet on the same or another

printhead (in Production and High Quality modes). In this way,

printing occurs with all jets for maximum quality.

When you notice a decrease in print quality, one or more inkjets

may be clogged. To recover clogged jets:

1. Print a Prime Bars pattern to determine whether there are

any missing jets (see page 3-8).

2. If there are any missing jets, Purge-n-Wipe the printheads

(see page 3-8) or Print Jet-Out Lines (page 3-8).

3. Run AutoJet (page 4-3) or Manual Jet Mapping (page 4-13).

4. Repeat this process until all jets are working or substituted for

another jet. This process is summarized in Fig. 3-1, below.

Fig. 3-1. Checking jet health and recovering jets

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HP 72SI User Manual Page 55