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AcuLaser C1100, CX11N & CX21N: How to check the developers

RELATES TO:

  • You have been advised to check the developers
  • There are lines or gaps in the print affecting one colour only
  • There are lines or gaps in the print that affect different colours in different places
  • These models: AcuLaser C1100, CX11N, CX21N and all variants.

EXPLANATION:

The developer rollers, also known as developers or devs, are internal components that transfer toner from the toner cartridges to the photoconductor unit.

  • There are four developers, one for each of the colours: black (K), cyan (C), magenta (M) and yellow (Y).

A problem with a developer causes print quality issues with the associated colour only.

This article explains how to check the developer rollers in your printer for print quality-related problems.


Notes Icon Note:

Using non-genuine consumable products may affect the developing process. Epson recommend using genuine Epson toner cartridges.

SOLUTION:

  1. Examples of print quality issues indicating a developer problem (click on an image to view an enlarged version).



    Figure 1 Figure 2 Figure 3
    Gap in cyan only Gaps in cyan, magenta and black Incorrect colours


    1. Refer to the following Related Article to create a standardised print sample: AcuLaser C1100, CX11 and CX21 Print Quality Troubleshooting Guide

      Note:

      These are examples only. Gaps can appear in different places, and the colours on your print will differ.


  2. Locate and check the developer rollers.



    1. Remove the photoconductor unit (PCU). For handling and care instructions, see your reference guide (available from the Epson website) or the following Related Article: AcuLaser C1100, CX11N & CX21N: How to remove and reinstall the photoconductor unit

    2. Close Cover A, if it is open.

      1. If Cover A is open, you cannot rotate the toner carousel.

        Figure 4. AcuLaser C1100/N

        Cover A open C1100


        Figure 5. AcuLaser CX11N(F)/CX21N(F)

        Cover A open CX11N/CX21N


    3. Rotate the toner carousel to locate the relevant developer roller(s).

      1. Push or pull on a toner cartridge to rotate the toner carousel forwards or backwards.

        Caution:

        Touch only the plastic toner cartridges. Do NOT touch the developer rollers or print quality may be impaired.

        • If the carousel will not turn, check that Cover A is closed.

          Figure 6. Rotating the toner carousel.

          Rotating Toner Carousel


          Figure 7. Example: the yellow (Y) developer roller.

          Yellow Developer Unit


    4. Check each of the four developer rollers.

      1. Each developer roller should have a uniform coating of toner (see Figure 7 above for an example), with a darker horizontal line along the centre. It is normal to find that the colour of the roller is darker than expected.

      2. Check that the toner cartridges are installed in the correct slots.

        • Each toner cartridge must be installed beneath the developer of the same colour (see Figure 7 and Figure 9).

      3. The developer rollers must be coated in the correct colour. If the colour is incorrect, the developer is contaminated.

      4. Vertical score marks or thin gaps indicate a damaged developer.

        Figure 8. Example of a damaged developer roller (black).


        Figure 9. Example of a damaged developer roller (cyan).


        • Figure 8 and Figure 9 show developer problems that would cause small vertical gaps to appear in solid sections of black or cyan respectively.

        • Gaps, patches or darker areas wider than these examples indicate that the toner has not coated the developer properly.

      5. If one or more developer rollers appear to be damaged, then the printer may require a service. Contact Epson for further advice.

    5. Reinstall the photoconductor unit, and close all the covers.

  3. How to resolve a developer problem.



    1. If you have identified a damaged developer, contact Epson for further advice.

      • The developer rollers in the AcuLaser C1100/N, CX11N/F and CX21N/F are not user-replaceable, and should be fitted by an Epson-trained service engineer.

    2. If the toner cartridges are in the wrong slots, remove and reinstall them.

    3. If a developer is not coated properly, i.e. toner is missing towards the right or in a wide area, then remove, shake and reinstall the relevant toner cartridge.  Then test the print quality again.

    4. If the developers appear to be contaminated, and the toner cartridges are installed in the correct slots, contact Epson for further advice.

      • The developer rollers in the AcuLaser C1100/N, CX11N/F and CX21N/F are not user-replaceable, and should be fitted by an Epson-trained service engineer.

      • Using non-genuine toner cartridges may affect the developing process, and contaminate the developers.

        • Epson recommend replacing non-genuine toner cartridges with genuine Epson ones. However, if the developers are badly contaminated, and the colours do not improve over time, the developers may need to be replaced as well.

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