HP 1050c Service Manual - Page 158
Solving the Banding Problem
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Print Quality Solving the Banding Problem There main causes of banding: n Printhead problems (see below). n Use of Non-HP media n Incorrect media type selected in the front panel. n Media advance problems. Banding Caused by Printhead Problems In this case you will see banding in only a few colors. If the test pattern has clear or dark horizontal bands in one or more of the primary color columns, then several of the secondary color columns will also have the same type of bands in the same position (but perhaps with less intensity). In the following example, several nozzles in the magenta printhead are not printing. There will be clear repetitive bands (perhaps white) in the magenta column. Consequently, you will see lower intensity bands in the same print position in the red (which is Magenta + Yellow) and blue (which is Magenta + Cyan) of the secondary color columns. 3 C60742 1 The bands could be caused by the nozzles not printing correctly. You can check the health of the nozzles by performing the Nozzle Print Test. 6-10 HP DesignJets 1050C and 1055CM Printers Service Manual