HP DesignJet T7200 Using Your Printer - Page 61
Clean the printhead drop detector, Reseat, Replace, Replace printheads
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5. Using the same cloth, clean the strip of electrical contacts on the printhead (unless the printhead is new). Avoid touching the printhead nozzles. CAUTION: Do not touch the surface of the printhead that contains the nozzles, because the nozzles are easily damaged. 6. After waiting a few moments to allow both connectors to dry, replace the printhead into the printhead carriage. See Insert a printhead on page 48. 7. Wash or dispose of the cloth. Take care to prevent the transfer of ink onto hands and clothing. If the front panel continues to show the Reseat or Replace message, replace the printhead or contact your HP customer service representative. Clean the printhead drop detector The printhead drop detector is a sensor that detects which nozzles on the printheads are not printing, so that other nozzles can substitute for them. If particles block the sensor (such as fibers, hair or small pieces of paper), print quality is affected. When the front panel displays a warning message that the drop detector needs cleaning, you are recommended to clean it. If you do not clean it immediately, the printer continues working normally, but the front panel display continues to show the warning. CAUTION: Wear gloves to avoid getting ink on your hands. 1. On the printer's front panel, select the icon, then select Replace printheads. 2. Turn off the printer at the front panel. 3. To avoid an electric shock, switch the printer off and unplug it. ENWW Work with ink system components 53
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