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  1. #1
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    Konica C7000 have a problem with black color.


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    Konica C7000 have a problem with black color.

    Hello, KM C7000 have a problem with black color, it blurry (see photo attach).
    I have replaced the drum, charge, belt, transfer belt, develop, develop unit, laser K but all wrong
    Please give me any ideas to solve, thanks
    IMG_20160814_084133.jpgIMG_20160813_151835.jpgIMG_20160813_160433.jpgIMG_20160813_224828.jpgIMG_20160813_180008.jpg

  2. #2
    Service Manager 2,500+ Posts
    Konica C7000 have a problem with black color.

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    Re: Konica C7000 have a problem with black color.

    have you performed the several adjustments after replacing the printhead?

  3. #3
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    Konica C7000 have a problem with black color.


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    Re: Konica C7000 have a problem with black color.

    I have adjustments Writing Initial Pos.., gammar adj, color registration

  4. #4
    Service Manager 2,500+ Posts
    Konica C7000 have a problem with black color.

    Synthohol's Avatar
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    Re: Konica C7000 have a problem with black color.

    here is the list of adjustments in case you didnt use the manual.
    good luck!

    "> When reinstalling the writing units, be sure to check that
    each of them is inserted straight.
    6. Reinstall the above parts following the removal steps in reverse.
    7. After replacing the writing unit /K, conduct the following item.
    - Cleaning the dust proof glass (Refer to F.5.2.1 - Cleaning the
    dust proof glass)
    - Writing initial position memory (Skew initial position memory)
    (Refer to I.5.3.9 Skew Initial Position Memory (Printer Adjustment -
    Writing Initial Pos. Memory))
    - I/O Check Mode (LD1 to LD8 alarm data clear, LD alarm
    measurement) (Refer to I.5.7.1 I/O Check Mode)
    - CD-Mag. Skew Adj. (Refer to I.5.3.13 CD-Mag. Skew Adj.
    (Printer Adjustment))
    - Restart Timing Adjustment (Refer to I.5.3.1 Restart Timing
    Adjustment (Printer Adjustment))
    - Color Registration Auto.Adj. (Refer to I.5.3.10 Color Registration
    Auto.Adj. (Printer Adjustment))
    - Color Registration Manual (Refer to I.5.3.11 Color Registration
    Manual (Printer Adjustment))
    - Gamma Automatic Adjustment (Refer to I.5.4.7 Gamma
    Automatic Adj. (Drum Peculiarity Adjustment))
    - Beam Pitch Adjustment (Refer to I.5.3.14 Beam Pitch Adjustment
    (Printer Adjustment))
    - Moire Adjustment (Refer to I.5.3.15 Moire Adjustment (Printer
    Adjustment))

  5. #5
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    Konica C7000 have a problem with black color.


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    Re: Konica C7000 have a problem with black color.

    Thank you Synthohol.
    I have done your way, I also have service manual for C7000, when replacing any parts I have to do the right process. But the situation doesn't improve.

  6. #6
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    Re: Konica C7000 have a problem with black color.

    Excuse my English.
    I had the same problem on a C6000 and solved by replacing the NVRAM ( k laser beams out of sync )



    QUOTE=cxtqd;528249]Hello, KM C7000 have a problem with black color, it blurry (see photo attach).
    I have replaced the drum, charge, belt, transfer belt, develop, develop unit, laser K but all wrong
    Please give me any ideas to solve, thanks
    IMG_20160814_084133.jpgIMG_20160813_151835.jpgIMG_20160813_160433.jpgIMG_20160813_224828.jpgIMG_20160813_180008.jpg[/QUOTE]

  7. #7
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    Konica C7000 have a problem with black color.


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    Re: Konica C7000 have a problem with black color.

    Replace NVRAM means you have to have a different C7000?

  8. #8
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    Re: Konica C7000 have a problem with black color.

    Quote Originally Posted by cxtqd View Post
    Replace NVRAM means you have to have a different C7000?

    No, it means that for the NV Ram must contact KonicaMinolta

  9. #9
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    Konica C7000 have a problem with black color.


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    Re: Konica C7000 have a problem with black color.

    Thanks Silviux, I don't think so NVRAM.
    I'll check it again.

    Have you any other idea?

    IMG_20160814_084133(1).jpg

  10. #10
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    Re: Konica C7000 have a problem with black color.

    Quote Originally Posted by cxtqd View Post
    Thanks Silviux, I don't think so NVRAM.
    I'll check it again.

    Have you any other idea?

    IMG_20160814_084133(1).jpg

    Printer image processing board
    Printer control board

    you have tried to reverse the k laser wiring that goes to Printer image processing board with another laser ?

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