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  1. #11
    Junior Member Hoss99's Avatar
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    Sep 2013
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    Re: Sharp DX-C401 with code L4-16

    The code has to do with the fuser pressure release sensor. Check to make sure the release solenoid is moving as well.

  2. #12
    Trusted Tech 50+ Posts
    Sharp DX-C401 with code L4-16

    Join Date
    Nov 2005
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    Re: Sharp DX-C401 with code L4-16

    In addition to all of the above, I have found many fusers where all of these items are fine (& some where techs have replaced some or all of them) & the fuser still frequently fails to pressurize or release, generating the L4-16 code. The ratchet system consists of 2 one way bearings, one in the ratchet arm, & another at the other end of the shaft, If the one in the arm fails, the shaft wont turn, but if the opposite one fails, the shaft will wobble back & forth until the machine times out & throws the code. I just (because I was tired of ordering fusers at far below their yield) pulled several "bad" fusers off of the shelf & ripped into them. I now have a few more "good" ones. Hope this saves some of you a few bucks.

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