NEC SuperScript 750C User Manual

Also see for SuperScript 750C: User guide

NEC SuperScript 750C User Manual Manual pdf 46 page image

When the printer is powered, the print head carriage willautomatically return to its rest position after 40 secondsof inactivity.Cleaning the Print HeadThe print heads are cleaned automatically at regularintervals while the printer is powered. This operationclears the print head nozzles, guaranteeing the ink flow.If you have a problem with the printing quality that is notsolved by this automatic nozzle clearing operation, you cando the same operation, using:• a key combination:WITH THE PRINTER COVER CLOSED, press and holdON LINE, press PAPER for at least two seconds andthen release both keys together.• the “CLEAN” function in the print care tab in the PrinterMonitor (see the specific section inUser Interface).If you have a problem with the printing quality that is notsolved by the nozzle clearing operation described above, trycleaning the print head, as follows:1. Open the cover, release and remove the print head.2. Clean the electrical contacts (gold part) on the print headand in the housing on the print head carriage with aslightly damp lint-free cloth, taking care not to touch theprint head nozzles.3. Re-insert the print head in the printer and close thecover.If there is still no improvement in the print quality, trycleaning the print head nozzles.This operation MUST NOT be repeated systematically, asit can damage the print head. It should ONLY beattempted as a last resort, before changing the ENTIREprint head.1. Open the cover, release and remove the print head.2. Dampen a tissue handkerchief with distilled water;squeeze it slightly to remove any excess water.3. Holding the print head with its nozzles facingdownwards, blot it against the handkerchief, pressinglightly.4. Repeat the blotting operation a few times on differentareas of the handkerchief, to clean the nozzles.5. Reinsert the print head in the printer and print the“demo” page to check the quality of printing (see thespecific section in theQuick Start).For other problems, see the specific items in theTroubleshooting Guide.22 Ink Jet Print Heads - Cleaning the Print Head