Question about Lexmark E342n Laser Printer

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84 yellow PC unit missing (all 4 showing missing)

I tried to fix a streaking problem & created a disaster. I pulled a few toner & pc units out & blew on them I placed them back & receieved the 84 pc missing message for all 4 colors. I called Lexmark they told me to order all 4 pc units I did & replaced them same message. Tried to clear same message. They tried to send a tech for $750 to my house a new unit w/ shipping is $640. Then yesterday they told me to order a top camshaft cover. WOW I got this thing today & I have to take apart the whole printer. I am scared to start this job especially if it might not work any advice? Lexmark's service team is over seas & the place me on hold fr sevral minutes they seem as lost as me....

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  • southsidemik Dec 04, 2008

    I am encountering the same problem. I just replaced the PC units now they tell me they are missing....and the waste toner box is "ok" sometimes, then comes up "missing", also. Mine is a C530dn....any advice other than break it?

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1 Answer

I had the same problem here and it turned out that I closed the front door of the printer in the wrong way. It is tempting to close the black inner door by hand at first and then close the outer (beige) door. The RIGHT way is to close the beige door and let the inner door being automatically pushed in place by this procedure. All "missing PC unit" warnings disappeared immediately after this. I hope this solves it for you as well,

Posted on Oct 14, 2008

  • rcantu91 Jan 24, 2011

    i had the same problem and got on a chat with lexmark technical support and they helped me fix it, they referred me herehttp://i26.tinypic.com/24bj3tw.jpg, make sure those two crank wheels are in the up position, i did that and immediately the printer recognized the pc units and started working, i still had to reset the counts on the pc units, but the printer was instantly functioning

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Posted on Jan 02, 2017

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How do I reset ms610 imaging unit?


When you get the error message "Replace imaging unit, 0 estimated pgs remain [84.3x]" This means the imaging unit has reached end of life and needs to be replaced. The device will not print, and this message will not be cleared, unless you replace it with part number 50F0Z00
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Vertical streaking. If the imaging unit is near end of life, or the device has had problems with non standard toner, vertical streaks may occur on the page. Replacing the imaging unit will resolve the problem.
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Replace the Imaging Unit to fix the problem.
Spots, scratches, marks on the page. If they are random, this indicates a problem with toner scatter.If they are repeating patterns, measure the distance between matching marks or spots. If the distance is one of 97mm, 47mm or 38mm, this indicates marks or dents on the imaging unit and it will need to be replaced.
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You receive the message Replace unsupported imaging unit The imaging unit you attempted to install was either non-genuine, or was from a different region. Buy a genuine Lexmark imaging unit from an authorised Lexmark supplier in your country/region.
You receive a 31.6x error One of the following errors is shown on the display:
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31.62 Imaging unit I2C packet has been sent but code timed-out on receiving the data (callback)
31.63 Imaging unit security error in the send challenge sequence
31.64 Imaging unit ROM signature error
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In this case you need to ensure that the imaging unit is properly installed. If yes, check if the imaging unit is supported. Replace with a supported imaging unit if necessary.
If the problem remains, you will need to organise a Lexmark service call (Australia 1300 362 192)
You receive error message 32.11 Imaging unit smart chip compatibility error This could be caused by an unsupported imaging unit (non-genuine or incorrect region). Replace with correct imaging unit to clear this error. If your imaging unit is supported, you will need to organise a Lexmark service call (Australia 1300 362 192).
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1 Answer

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i had the same problem and got on a chat with lexmark technical support and they helped me fix it, they referred me here http://i26.tinypic.com/24bj3tw.jpg, make sure those two crank wheels are in the up position, i did that and immediately the printer recognized the pc units and started working, i still had to reset the counts on the pc units, but the printer was instantly functioning

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