HP 72SI, 98SI manual Checking Jet Health

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-Wipethe 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

Checking Jet Health 3-7