LJ4050 41.3 Unexpected paper size

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  • Brian8506
    replied
    Re: LJ4050 41.3 Unexpected paper size

    Unfortunately no good news. Changed paper size board and entire pfu and no luck. Customer upgrading so machine will probably be scrapped out. I hate losing battles.

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  • Brian8506
    replied
    Re: LJ4050 41.3 Unexpected paper size

    Thanks. I'll try that Monday

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  • blackcat4866
    replied
    Re: LJ4050 41.3 Unexpected paper size

    Originally posted by Wild Bill
    You have to put electrical tape on the solenoid or it will not work correctly; just get the whole feed assembly their cheap
    Confirm that. I found that the metal actuator will magnetize if it makes direct contact with the coil. It has to have some kind of a pad. =^..^=

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  • Wild Bill
    replied
    Re: LJ4050 41.3 Unexpected paper size

    You have to put electrical tape on the solenoid or it will not work correctly; just get the whole feed assembly their cheap

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  • Brian8506
    replied
    Re: LJ4050 41.3 Unexpected paper size

    So when I replaced the paper size board I had actually taken it from the customers 2nd machine. Turns out that guy was having the same message. Took both machines apart and cleaned adhesive from solenoid plate. No good. Now I'm gonna order a new paper size board and start over.

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  • Wild Bill
    replied
    Re: LJ4050 41.3 Unexpected paper size

    Definetlty the solenoid; Very common...

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  • Brian8506
    replied
    Re: LJ4050 41.3 Unexpected paper size

    Thanks. Thats the job I've done only a couple times. Spend most time on copiers. I know its easy enough. I'll give it a shot later this week.

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  • blackcat4866
    replied
    Re: LJ4050 41.3 Unexpected paper size

    Only 10 minutes when you know where you're going. I did a 4100 last week, so it's fresh in my head.

    Remove cartridge
    rear fuser door,
    right side rear cover (over NIC)
    top cover (4 screws, laser shutter un-clipped from door)
    NIC box/cage assy (2 screws), slides out
    remaining right and left covers
    Two 4" long black shoulder screws at front left and front right
    Two machine screws from the area behind NIC box, and one connector ~14 pins
    One screw at left side rear

    Lift engine off cassette base

    metal plate off top of feed assy
    feed assy lifts right out into your hand. Ta Da! =^..^=

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  • Brian8506
    replied
    Re: LJ4050 41.3 Unexpected paper size

    380k on printer. I would guess pads. Solenoids dont go often. Is that easy to get to. I've only taken this to the frame a couple times.

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  • blackcat4866
    replied
    Re: LJ4050 41.3 Unexpected paper size

    ... hmm. Sounds like the tray #2 pickup solenoid is either magnetized, or the sound damping pad had gone sticky. The test is to press down the actuator hard, then release. The actuator should return immediately. If there is any delay you've found the problem. There are several ways to fix.

    If magnetized the solenoid will have to be replaced.

    If the foam pad is sticky, clean off the old pad and adhesive. Punch an 8mm disk of rubber (I have an old bicycle inner tube for the purpose), and secure it with superglue. =^..^=

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  • Brian8506
    replied
    Re: LJ4050 41.3 Unexpected paper size

    I replaced that board. No luck. It will feed 2 or 3 sheets thru then give the message, and shoot a blank. If I press go it will start again and do the same. Tray 2 loaded with paper. Tray 1 works fine

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  • blackcat4866
    replied
    Re: LJ4050 41.3 Unexpected paper size

    Check these first:

    "Load paper tray #1" when letter sized images are sent. In tray #2 paper length linkage gets stuck, indicating paper size "Plain Exec". Free up paper length linkage in tray #2.

    "13.1.00 PAPER JAM" message. Paper is present in tray #2, yet all paper attempts to feed from empty tray #1. Combination of two problems: tray #2 set to custom paper size on side of tray, and paper empty sensor is missing from tray #1 (detecting non-existent paper). Set paper size on tray #2 to Std paper sizes. Install PE senor flag on tray #1.


    I've also seen those push switches fail on the paper size PWB.
    =^..^=

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  • Brian8506
    started a topic LJ4050 41.3 Unexpected paper size

    LJ4050 41.3 Unexpected paper size

    Replaced feed and sep. Switched tray. Replaced feed size board rg5-2673. Could I have a problem with the paper feed unit? TIA
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