HP Designjet 350c HP Designjet 330 and 350C Plotters - Users Guide - Page 143

Troubleshooting Solving print quality problems 3 One or more of your cartridges may be out of ink. For an explanation of how to check, see page 7-2. 4 If the ink levels are OK, try to assess which cartridge has the problem. If the problem occurs only in one of the plotter's seven "primary" colors (yellow, cyan, magenta, red, green, blue and black), then you can eliminate one or more of the cartridges. Remember that the plotter's cartridges are yellow, cyan, magenta and black, and that "pure" red, green and blue are made up as follows: = red + yellow magenta = green + cyan yellow = blue + magenta cyan 5 If you know which cartridge has the problem, then prime that cartridge to clean the nozzles, and try your plot again. For an explanation of how to prime a cartridge, see page 7-7. 6 If you don't know which cartridge has the problem, run the Color Cartridge Test Procedure, as explained on page 5-7. Then prime the appropriate cartridge(s), as explained on page 7-7. 7 If the problem still occurs after priming, try reseating each cartridge to ensure good electrical connections. Then run both the Black Cartridge Alignment Procedure (see page 5-3) and the Color Cartridge Test Procedure (see page 5-7). 8 If the Color Cartridge Test Procedure still shows gaps or streaks in a cartridge you've already primed, then prime it again, this time pressing the plunger twice. 9 If the problem still occurs, try choosing a higher print-quality level (see page 2-8). With lower print-quality levels, the different pattern of ink may create the impression in some drawings of white streaks or gaps. 10 If the problem is still unresolved, replace the cartridge. TROUBLE- 9 SHOOTING 9-13