7-4 WorkCentre C2424 Service ManualPaper Preheater Cleaning (Remove Print Smears)The paper preheater cleaning procedure is a function selected on the control panel bythe user. This procedure cleans ink out of the paper preheater that may have beendeposited there. Heavier-weight, high-grade quality paper works best for thisprocedure. Ink can also be deposited if a jammed print, with ink on it, was pulledbackwards through the paper preheater.To perform the paper preheater cleaning cycle:1. On the control panel, select the Print Quality Problems menu and theRemove Print Smears menu.2. The system overheats the paper preheater to about 100 o C, softening ink trappedinside the paper preheater.Ordinarily the paper preheater runs at temperatures of between 60 o C and 65o Cfor paper or transparency film printing.3. The system picks and passes approximately 12-24 sheets of paper through thepaper path. The first few sheets absorb and remove ink from the paper preheater.The system continues to pass sheets of paper though to cool the preheater untilnormal operating temperature is reached. If duplex capability is enabled, 5 sheetsof paper go through the simplex paper path and up to 20 sheets go through theduplex paper path.4. The system returns to the Print Quality Problems menu.Because of the higher paper temperatures involved, this function can also be used toclean the drum surface of ink deposits caused by a contaminated blade on the drummaintenance system.Transfix Roller OilingOiling the transfix roller prevents ink from sticking to it. Every 50 prints, the systemperforms a transfix roller oiling cycle. During this cycle, oil is applied to the drum asit would be during a print cycle. The transfix roller is lowered against the drum andthe drum rotates, which transfers some of the oil to the transfix roller. The transfixroller is then raised to its standby position.Drum Cleaning - Chase PageThe system performs a drum cleaning with a chase page automatically anytime apaper jam occurs. The chase page transfers any image, which may not be complete,off the drum. The system then attempts to reprint the print that jammed. The chasepage is processed the same as a regular print, except that the drum is not oiled and noimage is printed on the drum (since an image is already printed on the drum). A chasepage is also run during startup/recovery if the system believes that there is ink on thedrum.
