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HP 4300 59.4 EP MOTOR ROTATION ERROR October 9, 2009

Posted by admin in : Hardware , trackback

The HP 4300 has two drive motors on the right side of the printer. One drives only the toner cartridge and the other drives everything else. The printer was designed to stop and display a 59.4 error if the toner cartridge drive motor should fail or the toner cartridge locks up. In cases where the drum drive gear melts onto the case of the toner cartridge from lack of lubrication, or in cases where the wiper blade flips and puts excess strain on the motor, there have been cases where the socket on the main drive gear in the printer breaks and then the printer displays the 59.4 error. The replacement part for the entire gear assembly is RM1-0001. Pictured below is the socket on the main drive gear that broke.

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