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  1. #21
    Senior Tech 250+ Posts
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    Re: Problem in MP C 2011

    Team
    Thank you for your suggestions & Support.

    If you allow me let me explain case study in more details -
    Customer is at about 7 hrs drive and just logged complained about faint bands. Visited customer without any parts in hand. Checked overall machine. Machin dis 30K only and problem started at 22nd copy of 30 prints job. First 21 prints ware absolutely perfect with solid colors. Problem exhibited before Fixing. Image on belt was OK ( Image no 2) Image no 1 shows solid patch of 4 colors with eqi-distance light bands ( please note that colors are reproduced but faded)

    On second Visit following activities done -
    Again checked all PCDU & ITB for jamming and condition.
    For intermittent fluctuations in PCDU HV - Replaced HVP CB
    For Intermittent charging of transfer roll in ITB - Replace ITB HVP TTS.
    Replace PSU - Ac+Dc
    Replace PTR with Door Assy.
    Replace IPU
    Motors - Transport & PCU ( Black & ITB drive).
    Problem was not resolved

    I have a doubt & I will appreciate any suggestion /inputs from Team.

    I am doubting on PTR Contact motor OR PTR Contact Sensor OR PTR Door close Sensor. Motor is with gear box and we cannot check the rotation easily. Also movement of
    ITB will be so minute that we cannot observe in running. My logic is if image on belt is ok and before fixing there is problem, it should be due to paper transfer.
    If motor is malfunctioning possibly PTR & ITB gap may be veering slightly causing uneven transfer on paper.

    Please suggest
    Regards & Thanks in advance

  2. #22
    Retired 10,000+ Posts
    Problem in MP C 2011

    slimslob's Avatar
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    Re: Problem in MP C 2011

    Quote Originally Posted by AjitN View Post
    Team
    Thank you for your suggestions & Support.

    If you allow me let me explain case study in more details -
    Customer is at about 7 hrs drive and just logged complained about faint bands. Visited customer without any parts in hand. Checked overall machine. Machin dis 30K only and problem started at 22nd copy of 30 prints job. First 21 prints ware absolutely perfect with solid colors.
    I have seen this with Production model where the toner is being depleted faster than the machine can compensate for. With them the cure was to increase the frequency of normal process control and turn on process control during print runs. As this model was not sold in the US, as do not have access to the service manual so can not recommend what SP to change.

    The attached .pdf might help but it was written for older color machines and the SP numbers may have changed.

    Service Program (SP) Settings.pdf

  3. #23
    Senior Tech 250+ Posts
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    Re: Problem in MP C 2011

    [QUOTE=slimslob;715910]I have seen this with Production model where the toner is being depleted faster than the machine can compensate for. With them the cure was to increase the frequency of normal process control and turn on process control during print runs. As this model was not sold in the US, as do not have access to the service manual so can not recommend what SP to change.

    The attached .pdf might help but it was written for older color machines and the SP numbers may have changed.

    Sir
    Thank you for support. I will definitely try this solution

    Regards

  4. #24
    Senior Tech. 2,500+ Posts NeoMatrix's Avatar
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    Re: Problem in MP C 2011

    Moist card stock from old supplies sitting around open to the air???

    As a test:
    Do a manual double sided copy and see if the same card stock is better copy on the second side.
    Or run the card stock through fuser first and then do a single test copy.
    Inauguration to the "AI cancel-culture" fraternity 1997...
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  5. #25
    Senior Tech 250+ Posts
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    Mar 2009
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    Re: Problem in MP C 2011

    Team
    This problem is resolved by replacing HVP_TTS and loose connection at CN 802.

    Thank you everyone for those suggestions & Support.
    Attached Images Attached Images

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