09/20073-31Phaser 8860/8860MFP Service Manual Jet Substitution ModeImage QualityInitial IssueFigure 11 Cleaning PageJet Substitution ModeJet Substitution Mode provides a solution for print-quality problems when weak or missing jetsare not recoverable by cleaning. This mode substitutes adjacent jets to print the area normallycovered by the problem jet. Perform a cleaning procedure before disabling any jets. Substitutedjets are stored and remain disabled until Jet Substitution Mode is turned Off.Jet Substitution Mode, refer to Figure 1, is not effective in correcting situations where 3 or moreconsecutively numbered jets (1) are weak or missing. Jet substitution requires the presence ofan numerically adjacent functional jet to replace the affected jet. As an example, If jet 2 is miss-ing, jet 1 or jet 3 could substitute for 2. If 1, 2, and 3 were all missing, no jet is available to sub-stitute for 2. Once Jet Substitution mode is enabled for a particular jet, the Light Stripes Testpage displays a black line (2) underneath the substituted jet number. It is normal for the substi-tuted jet to appear either blank or filled on Light Stripes Test page after substitution. Also,Saved & Stored jobs stored on the hard drive will not print correctly because they were ren-dered before the Jet Substitution was made.Figure 1 Jet Substitution Exceptions
