Reported adf problem hp m521 intermittent

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  • tmw
    Trusted Tech

    250+ Posts
    • Dec 2013
    • 256

    #1

    Reported adf problem hp m521 intermittent

    I only have a description of this problem to go by. I was there twice, one time right after they said it did it. Each time I could not reproduce the problem.
    They report that occasionally when scanning it was having a problem with the first page. (It will do a whole stack if it pulls right away.) The adf sounds like it's clicking and the page looks like it's going in and out a bit before it stops and registers a jam.
    I inspected the path and operation of the feeder. The gears mesh and have no broken teeth. Nothing is stuck in the path. They say if they cycle the power, usually it will work again, but sometimes not. I cleaned it up good, did a factory reset and updated to the latest firmware. Tested singles and stacks either by copy or scan function. I can't detect anything obvious, so I wonder if anyone has run across something similar. Or knows of anything I have missed. Thank you for your consideration.
  • austonrush
    Sharp & HP Tech

    100+ Posts
    • Jan 2010
    • 234

    #2
    Re: Reported adf problem hp m521 intermittent

    HP Doesn't make those ADF assemblies serviceable other than replacing the feed roller kit. I've seen your issue before and it can be caused by a damaged wire in the wiring harness for the adf. They are installed in such a way that when the ADF cover is opened repeatedly the wires get crimped and eventually brake. You can try checking and repairing the cables or just replace the ADF unit.

    ADF Unit part number is A8P79-65014

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