Question about HP LaserJet 4mv Printer

3 Answers

Will not print.

Printer is showing 50 service

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  • lrobb316 Jun 25, 2008

    thanks for the fast response. to my service problem.

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3 Answers

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Theproblem sounds like the fuser assembly. Here is a link explaining on how to check it that contains a tutorial with pictures:

Link

Good luck and keep me posted. If you thought this solution was helpful please rate it when you get a chance. Thanks - Tech101

Posted on Jun 25, 2008

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Hi lrobb316 - 50 Service Errors are symptoms of a fuser malfunction. They may indicate either an improperly seated fuser or a defective fuser. Turn your printer off for 20 minutes and then turn it back on. This may correct the error. If not it will require service. Thanks.

Jeff

Posted on Jun 25, 2008

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  • 818 Answers

LaserJet 4V ***If it is intermittent or can be cleared by shutting it off to let it cool. The fuser is running too hot, order rebuilt.***

Notes to remember!!

  • The low voltage power supply is what the takes the 110v ac from the outlet and is for this reason often mistaken as the high voltage power supply. The high voltage power supply HVPS main purpose is to charge the toner cartridge with a much higher dc voltage.
  • Always Remove Power from the printer before working on it!
  • Lamps can break in shipping or if the fuser is dropped.
  • The fusers use floating connectors don't force them in.

Posted on Jun 25, 2008

  • Sergio Scalfaro
    Sergio Scalfaro Jun 25, 2008

    BX Fuser Measurements

















    If
    you measure values in the indicated range on the right hand side of the
    fuser, the lamp is fine (240V fusers will read 3-4 times higher on the
    right hand side).



    Models
    HP LaserJet 4V/4MV (Check our cross reference guide for other brands)Removal Instructions
    Open
    the front of the printer. Pop out the charge transfer roller, being
    careful not to touch the surface of the roller. Handle it at the metal
    ends only. Remove the 5 big brass screws holding the fuser in. There is
    a screw at each lower end of the fuser. At the top of the fuser, you'll
    see 5 screws. Remove the 2 outboard and the center screws. While
    pulling out on the plastic side to clear the metal shaft, lift one end
    of the fuser up, repeating for the other end.
    If you don't have a
    meter, continuity can also be checked across the contacts on the right
    hand side of the fuser by using a digital tester.


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POCBM
  • 121 Answers

SOURCE: cannot reset code 50 for service

50 error is the fusing assm. You need to replace the fuser then the error will go away.
hope this helps.

Posted on Mar 23, 2009

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