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Printer got stuck

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by hearts5

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My friend is using a Hp640C colour printer,it was working well, but nowadays when he gives a print the printer cartridge gets stuck while printing and its power led and paper feed led starts blinking alternatively.He is not able to continue the print,then he should clean the sides of the cartridge and switch off the printer and then on to continue.It happens very often,eventhough the printer is kept in a clean atmosphere.(it is kept in a chilled room,will it cause the problem).I am confused about it please help me.
Thanks in advance.

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by johnm

When a printer begins sticking during a job, it is usually a lack of lubrication. The carriage that holds the ink cartridge slides on a large bar that is lightly lubricated. The carriage has bearings that ride on this layer of lubricant. Sometimes, something will get spilled on the bar that will make a rough spot, but that is rare, and requires cleaning and very careful polishing to get smooth. Sometimes, dirt or grit gets caught in the lubricant, gathered up by the carriage as it moves, and creates an abrasive film that slows the carriage down, lets heat build up from friction, swells the bar and brings the whole thing to a stop.

Usually, cleaning the bar with a soft, non-lint cloth, wiping off any buildup of lubricate on the carriage, and carefully laying a VERY thin coat of white lithium grease all over the bar will fix this problem.

It is a good place to start from for troubleshooting. Next most likely would be bad bearings on the carriage or a bad carriage drive motor,

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