Lexmark Z31 Color Jetprinter Service Manual - Page 21
Maintenance Station Service Check, Seals the printhead when it is not being used to prevent
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4099 Maintenance Station Service Check The maintenance station has three functions: 1. Wipes the printhead nozzles to clean them of dirt. 2. Provides a place for printheads to fire all nozzles, keeping them clear prior to printing. 3. Seals the printhead when it is not being used to prevent the nozzles from drying FRU Action 1 Maintenance Station Assembly As the carrier moves to the right over the maintenance station, a slot on the bottom of the carrier engages a tab on the sled of the maintenance station causing the cap to rise and seal the printhead. Carrier movement to the left uncaps the printhead. The wiper cleans the printhead nozzles as the carrier leaves the maintenance station. The wiper cleans the printhead only when the carrier is moving to the left. There should be no wiping action of the printhead nozzles when the carrier is moving to the right. After the cleaning operation is complete, a tab on the maintenance station engages a tab on the carrier, causing the wiper to lower. Check the maintenance station for worn or broken parts. Worn wipers cause degraded print quality just after a maintenance cleaning. Check for loose or worn wipers. Worn caps cause the printhead nozzles to dry and clog. Check for loose or worn caps. Diagnostic Information 2-7