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391

OKI 391 on laser printer: paper jam while feeding from the tray

Verified with sources6 sourcesReviewed Oct 4, 2026
Technician coming? See the 2 steps they must show you
Home office laser multifunction printer
Túllio FCC BY-SA 4.0Image source

Risk level

Low

Usually safe to check without specialist tools.

Urgency

Medium

Quick answer

OKI error 391 means a sheet jammed as it was picked from Tray 1 (392 is Tray 2). Pull out the indicated cassette, take out the jammed sheet, push the cassette back in, then open and close the top cover so the machine rechecks the paper path.

Safety first

Stop and check this first

  • Clean the rollers only with a damp, well wrung cloth as OKI describes; never pour liquid into the machine.
  • Do not stack paper above the mark on the paper guide: the manual forbids it and an overfilled cassette invites the 391 jam.

Safe checks you can perform

  • Take the jammed sheet out of the cassette
  • Open and close the top cover
  • Reload the paper the way OKI describes
  • Clean the paper feed rollers

Leave these tasks to a qualified professional

  • Do not attempt this professional task: Tray feed inspection
  • Do not attempt this professional task: Paper scraps out of reach

What a technician must be able to justify

Technician visit

These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.

These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.

  1. Tray feed inspection

    What they doIf 391 or 392 returns with fresh paper, correct loading and clean rollers, an authorised OKI technician checks the paper pick mechanism of that tray.

    They must show youthe printed status or configuration report and which tray keeps jamming.

    In writingwhich part is replaced, why, and whether warranty covers it.

  2. Paper scraps out of reach

    What they doIf a scrap remains inside the tray opening and you cannot reach it without taking anything apart, let OKI service remove it.

    They must show youthe scrap removed and a page printed from that tray without a jam.

    In writingthe work done and the case number.

Before accepting a part or repair

Nothing has been shown yet. Do not accept a part swap based on the code alone.

Follow these steps

Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.

  1. Take the jammed sheet out of the cassette

    No special tools

    Who:
    you.
    How:
    pull out the cassette of the tray the code names (391 Tray 1, 392 Tray 2), slowly remove the jammed sheet and any scraps, then push the cassette fully back in.
    Result that matters:
    a clear paper entry with no folded sheets or leftovers.
    If the sheet comes out whole:
    carry on with opening and closing the top cover.
    If it tears:
    look for the pieces in the cassette opening before refitting the cassette.
    Evidence to keep:
    a photo of the code shown and of the sheet you removed.

    Evidence: OKI MB492/MB562 Web Manual - If the Error Code is 391, 392 · Manual Web OKI MB492/MB562 - Si el código de error es 391, 392

  2. Open and close the top cover

    No special tools

    Who:
    you.
    How:
    open the scanner unit, press the top cover open button, open the top cover, close it again and then lower the scanner unit, as the OKI manual lists for this code.
    Result that matters:
    the machine re-arms jam detection and the jam message clears.
    If the jam alert clears:
    print a test page from the same tray.
    If it stays or a different number appears:
    follow the new code, since it points to another part of the paper path.
    Evidence to keep:
    a note of whether the message cleared and which code, if any, followed.

    Evidence: OKI MB492/MB562 Web Manual - If the Error Code is 391, 392 · Manual Web OKI MB492/MB562 - Si el código de error es 391, 392

  3. Reload the paper the way OKI describes

    No special tools

    Who:
    you.
    How:
    take the stack out, fan it and square the edges, load it print side down below the mark, set the guide and stopper, then on the panel go to Device Settings, Paper Setup, and set paper size, media type and media weight.
    Result that matters:
    the loaded paper and the panel settings agree.
    If 391 does not come back:
    loading or settings were the cause.
    If it repeats with fresh, well loaded paper:
    move on to cleaning the rollers.
    Evidence to keep:
    the size, type and weight set on the panel.

    Evidence: OKI MB492/MB562 Web Manual - Loading Paper in Tray 1 and Tray 2 · Manual Web OKI MB492/MB562 - Carga del papel en la Bandeja 1 y Bandeja 2

  4. Clean the paper feed rollers

    No special tools

    Who:
    you.
    How:
    with the cassette out, wipe the two feed rollers inside the machine with a damp cloth wrung out well; then empty the cassette, wipe its separation roller, reload the paper and close the tray.
    Result that matters:
    restored grip on the rollers that pick the first sheet.
    If the jams stop:
    note the date of the cleaning.
    If they keep happening often:
    ask an authorised OKI service provider to inspect the tray.
    Evidence to keep:
    date of cleaning and the number of jams before and after.

    Evidence: OKI MB492/MB562 Web Manual - If the Error Code is 391, 392 · Manual Web OKI MB492/MB562 - Si el código de error es 391, 392 · OKI MB492/MB562 Web Manual - Cleaning the Paper Feed Rollers (Tray 1/Tray 2) · Manual Web OKI MB492/MB562 - Limpieza de los rodillos de alimentación de papel (Bandeja 1/Bandeja 2)

Still not solved

If the error persists, stop here. See what the technician must do and show you.

Where this code applies

A code is meaningful only inside the right product and version context.

Primary scope

System
Printers
Brand
OKI
Product type
Laser printer

Known code variants

  • Atasco de papel quitar y comprobar la bandeja
  • OKI 391
  • OKI 391 atasco bandeja 1
  • OKI 391 tray 1 jam
  • OKI 392
  • OKI 392 atasco bandeja 2
  • OKI 392 tray 2 jam
  • OKI código de error 391
  • OKI error 391
  • OKI error code 391
  • OKI MB492 391
  • OKI MB562 391
  • Paper jam has occurred remove and check the tray cassette

What it means

In the web manual for the OKI MB492 and MB562 multifunction printers, the message Paper jam has occurred, remove and check the tray cassette carries a number that locates the sheet: 391 points to Tray 1 and 392 to the optional Tray 2. The sheet stops right as it leaves the cassette, before reaching the image drum. Other OKI models may number their trays differently, so compare with the guide for your machine. A 391 on the panel does not mean a roller is worn or broken; a skewed sheet, badly loaded paper or dirty rollers are far more common.

Warnings and stop conditions

  • Lowsource verified

    Clean the rollers only with a damp, well wrung cloth as OKI describes; never pour liquid into the machine.

    Evidence: OKI MB492/MB562 Web Manual - Cleaning the Paper Feed Rollers (Tray 1/Tray 2) · Manual Web OKI MB492/MB562 - Limpieza de los rodillos de alimentación de papel (Bandeja 1/Bandeja 2)

  • Mediumsource verified

    Do not stack paper above the mark on the paper guide: the manual forbids it and an overfilled cassette invites the 391 jam.

    Evidence: OKI MB492/MB562 Web Manual - Loading Paper in Tray 1 and Tray 2 · Manual Web OKI MB492/MB562 - Carga del papel en la Bandeja 1 y Bandeja 2

Symptoms and causes

Probable causes · in order

  • Paper loaded badly in the cassetteCommon

    OKI asks you to set the paper guide and stopper to the paper size, fan the stack, load it print side down and stay under the fill mark; miss one of these and the sheet feeds skewed.

    Evidence: OKI MB492/MB562 Web Manual - Loading Paper in Tray 1 and Tray 2 · Manual Web OKI MB492/MB562 - Carga del papel en la Bandeja 1 y Bandeja 2

  • Dirty paper feed rollersCommon

    The manual says that when jams happen often you should clean the feed rollers inside the machine and the separation roller in the cassette.

    Evidence: OKI MB492/MB562 Web Manual - If the Error Code is 391, 392 · Manual Web OKI MB492/MB562 - Si el código de error es 391, 392 · OKI MB492/MB562 Web Manual - Cleaning the Paper Feed Rollers (Tray 1/Tray 2) · Manual Web OKI MB492/MB562 - Limpieza de los rodillos de alimentación de papel (Bandeja 1/Bandeja 2)

  • Paper size or type not setPossible

    After loading a tray OKI has you set paper size, media type and media weight on the panel; if they do not match what is in the cassette, feeding can fail.

    Evidence: OKI MB492/MB562 Web Manual - Loading Paper in Tray 1 and Tray 2 · Manual Web OKI MB492/MB562 - Carga del papel en la Bandeja 1 y Bandeja 2

Virtual technician

Does 391 still appear after these checks?

Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.

Start diagnosis

Sources and technical references

  1. 1

    OKI MB492/MB562 Web Manual - If the Error Code is 391, 392

    OKI Data Corporation · 2014 · official_doc

  2. 2

    Manual Web OKI MB492/MB562 - Si el código de error es 391, 392

    OKI Data Corporation · 2014 · official_doc

  3. 3

    OKI MB492/MB562 Web Manual - Cleaning the Paper Feed Rollers (Tray 1/Tray 2)

    OKI Data Corporation · 2014 · official_doc

  4. 4

    Manual Web OKI MB492/MB562 - Limpieza de los rodillos de alimentación de papel (Bandeja 1/Bandeja 2)

    OKI Data Corporation · 2014 · official_doc

  5. 5

    OKI MB492/MB562 Web Manual - Loading Paper in Tray 1 and Tray 2

    OKI Data Corporation · 2014 · official_doc

  6. 6

    Manual Web OKI MB492/MB562 - Carga del papel en la Bandeja 1 y Bandeja 2

    OKI Data Corporation · 2014 · official_doc

Sources: OKI MB492/MB562 Web Manual - If the Error Code is 391, 392 · Manual Web OKI MB492/MB562 - Si el código de error es 391, 392 · OKI MB492/MB562 Web Manual - Cleaning the Paper Feed Rollers (Tray 1/Tray 2) · Manual Web OKI MB492/MB562 - Limpieza de los rodillos de alimentación de papel (Bandeja 1/Bandeja 2) · OKI MB492/MB562 Web Manual - Loading Paper in Tray 1 and Tray 2 · Manual Web OKI MB492/MB562 - Carga del papel en la Bandeja 1 y Bandeja 2reviewed 2026-10-04 · verified

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